Rainbow Electronics MAX5661 User Manual

General Description

The MAX5661 single 16-bit DAC with precision highvoltage amplifiers provides a complete solution for programmable current and voltage-output applications. The output amplifiers swing to industry-standard levels of ±10V (voltage output) or source from 0mA (or from 4mA) to 20mA (current output). The voltage output (OUTV) drives resistive loads greater than 2kΩ and capacitive loads of up to 1.2µF. Voltage-output forcesense connections compensate for series protection resistors and field-wiring resistance. Short-circuit protection on the voltage output limits output current to 10mA (typ) sourcing or -11.5mA (typ) sinking. The current output (OUTI) drives resistive loads up to 37.5V (max) and inductive loads up to 1H.

The MAX5661 provides either a current output or a voltage output. Only one output is active at any given time, regardless of the configuration. The MAX5661 voltage output operates with ±13.48V to ±15.75V supplies (V

DDV

, V

SSV

) and the current output operates with a

single +13.48V to +40V supply (V

DDI

). A +4.75V to

+5.25V digital supply (V

) powers the rest of the internal circuitry. A buffered reference input accepts an external +4.096V reference voltage.

Update the DAC outputs using software commands or the asynchronous LDAC input. An asynchronous CLR input sets the DAC outputs to the value stored in the clear register or to zero. The FAULT output asserts when the DAC’s current output is an open circuit, the DAC’s voltage output is a short circuit, or when the CLR input is low.

The MAX5661 communicates through a 4-wire 10MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The DOUT output allows daisy chaining of multiple devices. The MAX5661 is available in a 10mm x 10mm, 64-pin, LQFP package and operates over the

-40°C to +105°C temperature range.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Applications

Industrial Analog Output Modules

Industrial Instrumentation

Programmable Logic Controls/Distributed Control Systems

Process Control

Features

♦ 10-Bit Programmable Full-Scale Output

Adjustment for Up to ±25% Over Range

♦ Programmable Voltage Output

Unipolar Range: 0 to +10.24V ±25% Bipolar Range: ±10.24V ±25%

♦ Programmable Current Output

Unipolar Low Range: 0 to 20.45mA Unipolar High Range: 3.97mA to 20.45mA

♦ Flexible Analog Supplies (See Table 16)

±13.48V to ±15.75V for Voltage Output +13.48V to +40V for Current Output

♦ Force-Sense Connections (Voltage Output)

for Differential Voltage-Output Remote Sensing

♦ Voltage-Output Current Limit

♦ Dropout Detector Senses Out-of-Regulation

Current Output

♦ CLR and LDAC Inputs for Asynchronous DAC

Updates

♦ CLR Input Resets Output to Programmed Value or

Zero Code

♦ FAULT Output Indicates Open-Circuited Current

Output, Short-Circuited Voltage Output, or Clear State

♦ Temperature Drift

Voltage Output: ±0.4ppm FSR/°C Current Output: ±7.9ppm FSR/°C

♦ Small 64-Pin LQFP Package (10mm x 10mm)

MAX5661

19-0741; Rev 0; 8/08

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

Pin Configuration and Typical Operating Circuit appear at end of data sheet.

________________________________________________________________

Maxim Integrated Products

For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

Denotes a lead-free/RoHS-compliant package.

PART TEMP RANGE PIN-PACKAGE

MAX5661GCB+

64 LQFP

-40°C to +105°C

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

2 ________________________________________________________________________________________

DDCORE

to V

SSV

...................................................-0.3V to +42V

DDI

to AGND.........................................................-0.3V to +42V

DDV

to AGND........................................................-0.3V to +17V

SSV

to AGND ........................................................-17V to +0.3V

DDI

to V

SSV

...........................................................-0.3V to +59V

to DGND ...........................................................-0.3V to +6V

DGND, DUTGND, DUTGNDS, DACGND,

DACGNDS to AGND ............................................-0.3V to +6V

Digital Inputs (CS, DIN, SCLK, CLR, LDAC,

CNF_) to DGND .....................................-0.3V to (V

+ 0.3V)

Digital Outputs (DOUT, FAULT) to DGND....................................

...............................-0.3V to the lesser of (V

+ 0.3V) or +6V

REF to AGND............................................................-0.3V to +6V

OUTV, SVP, SVN, COMPV to V

SSV

...........-0.3V to (V

DDV

+ 0.3V)

OUTI, COMPI, OUTI4/0 to AGND..............-0.3V to (V

DDI

+ 0.3V)

Maximum Current into Any Pin .......................................±100mA

Continuous Power Dissipation (T

= +70°C) 64-Pin, 10mm x 10mm TQFP (derate 25mW/°C

above +70°C)............................................................ 2000mW

Junction-to-Ambient Thermal Resistance

in Still Air (θ

) ...………………………………………….40°C/W

Junction-to-Case Thermal Resistance (θ

)...................... 8°C/W

Operating Temperature Range .........................-40°C to +105°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering,10s) ..................................+300°C

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V, V

AGND

= V

DGND

= V

DUTGND

DACGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= -40°C to +105°C,

unless otherwise noted. Typical values are at T

= +25°C. See the

Typical Operating Circuit

.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

STATIC PERFORMANCE

Resolution 16 Bits

Integral Nonlinearity INL

Differential Nonlinearity DNL Guaranteed monotonic (Note 3) -1.0 +1.0 LSB

Zero-Scale Voltage Error V

Zero-Scale Current (Note 4)

Zero-Scale Current Error (Note 4)

Voltage-Offset Error Drift TCV

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

OUT

, V

= V

DDI

= 40V,

DDV

OUT

SSV

(Note 2)

, V

DDI

= V

S S V

OUT

= + 15V , V (Note 2)

ZSE

OUTV

0 to 20mA mode

4–20mA mode

0 to 20mA mode

ZSE

4–20mA mode

OUTV

±0.2 ±4

4–20mA ±6

= 0

0 to 20mA ±10

DDV

4–20mA ±2

= - 15V

0 to 20mA ±6

Unipolar ±0.01 ±3

Bipolar ±2.0 ±10

TA = +25°C -45 -30 -15

= T

MIN

to T

MAX

-60 -30 0

TA = +25°C 3.955 3.97 3.985

= T

MIN

to T

MAX

3.94 3.97 4.00

TA = +25°C -15 ±2.0 +15

= T

MIN

to T

MAX

-30 ±2.0 +30

TA = +25°C -15 ±3.0 +15

= T

MIN

to T

MAX

-30 ±7.0 +30

Unipolar ±0.5

Bipolar ±0.2

LSB

µA

ppm of

FSR/

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V, V

AGND

= V

DGND

= V

DUTGND

DACGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= -40°C to +105°C,

unless otherwise noted. Typical values are at T

= +25°C. See the

Typical Operating Circuit

.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Current-Offset Error Drift TCI

Gain Error GE

Gain-Error Drift TCGE

Power-Supply Rejection Ratio PSRR

REFERENCE INPUT

Reference Input Current I

Reference Input Voltage Range V

DYNAMIC PERFORMANCE

Output-Voltage Noise at 10kHz e

Output-Current Noise at 10kHz i

Voltage-Output Slew Rate

Current-Output Slew Rate L

Major Code Transition Glitch

Digital Feedthrough

OUTI

OUTV

OUTI

OUTV

OUTI

OUTV, unipolar output, full-scale code, V

from +13.48V to +15.75V

DDV

OUTV, bipolar output, zero-scale code, V

from -13.48V to -15.75V

SSV

OUTI, full-scale code, V +40V, V

= -15.75V, V

SSV

OUTI, full-scale code, V

REF

+40V, V

Unipolar output, V

Bipolar output, V

0 to 20mA range 132

4–20mA range 120

OUTV

step = 20V, C

OUTI

= V

DDV

= 100pF, R

EXT

= 0, R

OUTI

SSV

OUTV

= 0nF

= 500Ω, step = 20mA 0.15 mA/µs

From code 7FFFh to code 8000h

Outputs set to zero scale, all digital inputs from

and

0V to V back to 0V

0 to 20mA ±4

4–20mA ±4

Unipolar ±2.5 ±10

Bipolar ±4.5 ±20

TA = +25°C ±8.0 ±70

= T

MIN

to T

MAX

±40 ±130

Unipolar ±0.4

Bipolar ±0.4

0 to 20mA -7.9

4–20mA -8.6

20 200

from +13.48V to

DDI

DDV

DDI

= 0

= +15.75V

from +13.48V to

0.013 5

0.017 5

0.050 1 µA

4.0 4.096 4.2 V

= +10.48V 230

OUTV

= ±10.48V 300

= 2kΩ,

OUTV

0.1 V/µs

OUTV 1 µV•s

OUTI

0 to 20mA 2.0

4–20mA 2.0

OUTV 0.1 nV•s

OUTI, R

= 500Ω 0.2 pA•s

ppm of

FSR/

µA

ppm of

FSR/

µV/V

µA/V

nV/√Hz

pA/√Hz

nA•s

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

4 ________________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V, V

AGND

= V

DGND

= V

DUTGND

DACGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= -40°C to +105°C,

unless otherwise noted. Typical values are at T

= +25°C. See the

Typical Operating Circuit

.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SETTLING TIME

Voltage-Output Settling Time

Current-Output Settling Time

Bipolar output, C

COMPV

= 3.3nF,

to 0.1%

Bipolar output, C

COMPV

= 0nF,

to 0.1%

Unipolar output, C

COMPV

= 3.3nF,

to 0.1%

Unipolar output, C

COMPV

= 0nF,

to 0.1%

0 to 20.45mA range to 0.1%

3.97mA to

20.45mA range to 0.1%

= 1nF,

OUTV

= 2kΩ

OUTV

= 1.2µF,

OUTV

= 2kΩ

OUTV

= 100pF,

OUTV

= 2kΩ

OUTV

= 1nF,

OUTV

= 2kΩ

OUTV

= 1.2µF,

OUTV

= 2kΩ

OUTV

= 100pF,

OUTV

= 2kΩ

OUTV

= 500Ω 1.5

OUTI

= 1mH 1.66

OUTI

= 10mH 1.66

OUTI

= 1H 1.97

OUTI

= 500Ω 1.43

OUTI

= 1mH 1.58

OUTI

= 10mH 1.58

OUTI

= 1H 1.73

OUTI

5.44

244 µs

1.8

3.64

130 µs

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V, V

AGND

= V

DGND

= V

DUTGND

DACGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= -40°C to +105°C,

unless otherwise noted. Typical values are at T

= +25°C. See the

Typical Operating Circuit

.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OUTV OUTPUT

OUTV Linear Output Voltage Range

Default OUTV Output Voltage Ranges (0V to Full Scale)

Minimum OUTV Output Voltage Range (FS to ADJ)

Maximum OUTV Output Voltage Range (FS to ADJ)

DC Output Impedance 0.1 Ω

OUTV Off-State Leakage Current

OUTV Short-Circuit Output Current

Minimum OUTV Resistive Load R

Maximum OUTV Capacitive Load C

OUTI OUTPUT

OUTI Voltage Compliance Full-scale output, R

OUTI Output Current Range

DC Output Impedance OUTI = full scale 45 MΩ

OUTI Off-State Leakage Current

Current-Mode Dropout Detection V

FEEDBACK SENSE BUFFER INPUTS

Input Current V

Input Voltage Range SVP, SVN

DIGITAL INPUTS

Input High Voltage V

Input Low Voltage V

Input Capacitance C

Input Leakage Current I

DIGITAL OUTPUTS

Output High Voltage V

Output Low Voltage V

OUT

OUTV

Unipolar, V

Bipolar, V

Unipolar +7.68

Bipolar ±7.68

Unipolar +12.8

Bipolar ±12.8

OUTV off or disabled, output leakage current from OUTV to AGND

Sourcing 7 10 13

Sinking -18.0 -11.5 -9.0 Full-scale code 2 kΩ

= 3.3nF 1.2 µF

COMPV

= 0nF 1 nF

COMPV

0 to 20mA mode includes FS calibration (Note 4)

= +13.48V, V

DDV

= +13.48V, V

DDV

= 1500Ω (Note 5) V

OUTI

SSV

3.0

= -13.48V 0 +10.48

SSV

= -13.48V -10.48 +10.48

SSV

2.5 10 µA

0 20.45

DDV

3.0

- 2.5 V

DDI

4–20mA mode includes FS calibration 3.97 20.45

OUTI off or disabled, 0V < V

DDI

SSV

< V

OUTI

- V

+ 1.7V < SVP, SVN < V

DDI

, FAULT does not assert 1.3 V

OUTI

- 1.7V 0.05 1 µA

DDV

SSV

+ 1.7

VCC = 4.75V to 5.25V 2.4 V

VCC = 4.75V to 5.25V 0.8 V

VIN = 0V or V

= 400µA, except FAULT VCC - 0.5 V

SOURCE

VCC = 4.75V

= 1.6mA 0.4

SINK

= 10mA 1

SINK

-1 +1 µA

0.1 10 µA

DDV

- 1.7

10 pF

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

6 ________________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V, V

AGND

= V

DGND

= V

DUTGND

DACGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= -40°C to +105°C,

unless otherwise noted. Typical values are at T

= +25°C. See the

Typical Operating Circuit

.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output High Leakage Current FAULT only 0.1 2 µA

Thr ee- S tate Outp ut Leakag e C ur r ent DOUT only ±0.1 ±2 µA

POWER SUPPLIES (see Table 16)

VCC Supply Range V

Supply Range V

DDV

Supply Range V

SSV

Supply Range V

DDI

DDCORE

Supply Range V

Analog and Digital Supply Currents (OUTV Active)

Analog and Digital Supply Currents (OUTI Active), 0 to 20mA Mode

Analog and Digital Supply Currents (OUTI Active), 4–20mA Mode

Analog and Digital Supply Currents (Either OUTV or OUTI Active)

+4.75 +5.25 V

Only OUTV powered +13.48 +15.75

DDV

Only OUTI powered AGND

Both OUTV and OUTI powered +13.48 +15.75

Only OUTV powered -15.75 -13.48

SSV

Only OUTI powered AGNDV

Both OUTV and OUTI powered -15.75 -13.48

DDI

DDCORE

VDDV

VDDI

VDDCORE

VSSV

AGND

VCC

VDDV

VDDI

VDDCORE

VSSV

AGND

VCC

VDDV

VDDI

VDDCORE

VSSV

AGND

VCC

VDDV

VDDCORE

VSSV

AGND

VCC

VDDI

Only OUTV powered V

Only OUTI powered +13.48 +40.00V

Both OUTV and OUTI powered V

DDV

Only OUTV powered V

Only OUTI powered V

Both OUTV and OUTI powered V

OUTV powered, V = +15.75V, V

SSV

OUTV unloaded, all ditgital inputs at V DGND

= V

DDI

= V

DDCORE

DDV

= -15.75V, VCC = +5.25V,

-5 -2.5

-3.0 -1.6

OUTI powered, V

= V

DDI

DDCORE

+5.25V, zero code

= V

DDV

= AGND,

SSV

= +12V to +40V, VCC =

-1.0 -0.03

-4.0 -2.1

OUTI powered, V V

= V

DDI

DDCORE

+5.25V, zero code

= V

DDV

= AGND,

SSV

= +12V to +40V, VCC =

-1.0 -0.03

-4.0 -2.1

Both OU TV and O U TI p ow er ed , V V + 40V , V cod e, all ditgital inputs at V

D D C ORE

= + 15.75V , V

= + 5.25V , O U TV unl oad ed at zer o

C C

= - 15.75V , V

S S V

D D V

or DGND

D D I

-4.0 2.6

-4.0 -2.0

0 to 20mA at zero code 1.3 2

4–20mA at zero code 5.3 6.5

DDV

+40

DDV

DDI

DDV

4.5 6.5

0.03 0.2

2.8 5.5

0.03 0.2

6.8 9.5

0.03 0.2

4.2 6

0.03 0.2

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

_______________________________________________________________________________________ 7

Note 1: Devices are 100% production tested at TA= +25°C and +105°C. Operation to -40°C is guaranteed by design. Note 2: I

OUT

INL 100% production tested from 0 to 20mA only.

Note 3: I

OUT

DNL guaranteed by V

OUT

DNL.

Note 4: 0 to 20mA zero-scale current extrapolated by interpolation from full scale and code 192. See the

Measuring Zero-Code

Current (0 to 20mA Mode)

section.

Note 5: OUTI voltage compliance measured at V

DDI

= +33.22V.

Note 6: When updating the DAC registers, allow 5µs before sending the next command.

TIMING CHARACTERISTICS

(VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V, AGND = DGND = DUTGND =

DACGND = 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= -40°C to +105°C,

unless otherwise noted. Typical values are at T

= +25°C. See Figure 1.) (Notes 1, 6)

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

SCLK Rise or Fall to CS Fall Setup Time

CS Fall to SCLK Rise or Fall Setup Time

SCLK Pulse-Width High t

SCLK Pulse-Width Low t

DIN to SCLK High Setup Time t

DIN to SCLK High Hold Time t

SCLK Period t

CS Pulse-Width High t CS High to SCLK High or Low

Setup Time SCLK High to CS Hold Time t

SCLK Fall to DOUT Valid Propagation Delay

CS Transitions to DOUT Enable/Disable Delay

SCLK Fall or Rise to CS Rise Time

LDAC Pulse-Width Low t CS Rise to LDAC Rise Time t

CSO

CSS

CSW

CS1

CSH

SCS

LDL

CSLD

DOUT

= 100pF 100 ns

45 ns

40 ns

45 ns

40 ns

0ns

100 ns

45 ns

15 ns

40 ns

80 ns

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

8 ________________________________________________________________________________________

Figure 1. Serial-Interface Timing Diagram

Typical Operating Characteristics

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

SCLK

DIN

DOUT

LDAC

CSO

CSS

CSH

SCS

CS1

CSLD

CSW

LDL

INL vs. DIGITAL INPUT CODE

1.0

0.8

0.6

0.4

0.2

INL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0

UNIPOLAR VOLTAGE OUTPUT

0 16,384 32,768 49,152 65,536

DIGITAL INPUT CODE

MAX5661 toc01

INL vs. DIGITAL INPUT CODE

1.0

0.8

0.6

0.4

0.2

INL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0

BIPOLAR VOLTAGE OUTPUT

0 16,384 32,768 49,152 65,536

DIGITAL INPUT CODE

MAX5661 toc02

INL vs. DIGITAL INPUT CODE

INL (LSB)

-1

-2

0 TO 20mA CURRENT OUTPUT

0 16,384 32,768 49,152 65,536

DIGITAL INPUT CODE

MAX5661 toc03

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

INL vs. DIGITAL INPUT CODE

9 8 7 6 5 4

INL (LSB)

3 2 1

-1

-2 0 16,384 32,768 49,152 65,536

0 TO 20mA CURRENT OUTPUT

= V

DDI

DDCORE

= V

= 0V

DDV

SSV

DIGITAL INPUT CODE

DNL vs. DIGITAL INPUT CODE

0.5

0.4

0.3

0.2

0.1

DNL (LSB)

-0.1

-0.2

-0.3

-0.4

-0.5 0 16,384 32,768 49,152 65,536

DIGITAL INPUT CODE

= +40V

ALL MODES

MAX5661 toc04

MAX5661 toc06

INL vs. DIGITAL INPUT CODE

INL (LSB)

-1

-2

-3

4–20mA CURRENT OUTPUT

0 16,384 32,768 49,152 65,536

DIGITAL INPUT CODE

INL vs. TEMPERATURE

0.4

0.3

0.2

0.1

INL (LSB)

-0.1

-0.2

-0.3 UNIPOLAR VOLTAGE OUTPUT

-0.4

-50 -25 0 25 50 75 100 125

MAX INL

MIN INL

TEMPERATURE (°C)

MAX5661 toc05a

MAX5661 toc07

INL vs. DIGITAL INPUT CODE

INL (LSB)

-1

-2 0 16,384 32,768 49,152 65,536

4–20mA CURRENT OUTPUT

= V

DDCORE

SSV

= +40V

= 0V

DDI

DDV

DIGITAL INPUT CODE

INL vs. TEMPERATURE

0.5

0.4

0.3

0.2

0.1

INL (LSB)

-0.1

-0.2

-0.3

-0.4

-50 -25 0 25 50 75 100 125

MAX INL

MIN INL

BIPOLAR VOLTAGE OUTPUT

TEMPERATURE (°C)

MAX5661 toc05b

MAX5661 toc08

3.0

2.5

2.0

1.5

1.0

INL (LSB)

0.5

-0.5

-1.0

-50 0-25 25 50 75 100 125

0 TO 20mA CURRENT OUTPUT

MAX INL

MIN INL

TEMPERATURE (°C)

INL vs. TEMPERATURE

MAX5661 toc09

INL vs. TEMPERATURE

7.0

6.5

6.0

5.5

5.0

4.5

4.0

3.5

3.0

INL (LSB)

2.5

2.0

1.5

1.0

0.5 0

-0.5

-1.0

-50 -25 0 25 50 75 100 125

0 to 20mA CURRENT OUTPUT

DDI

MAX INL

MIN INL

TEMPERATURE (°C)

= V

DDCORE

DDV

= V

= +40V

= 0V

SSV

MAX5661 toc10

3.0

2.5

2.0

1.5

1.0

INL (LSB)

0.5

-0.5

-1.0

MAX INL

MIN INL

-50 -25 0 25 50 75 100 125

4–20mA CURRENT OUTPUT

TEMPERATURE (°C)

INL vs. TEMPERATURE

MAX5661 toc11a

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

10 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

INL vs. TEMPERATURE

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

INL (LSB)

1.5

1.0

0.5 0

-0.5

-1.0

MAX INL

-50 -25 0 25 50 75 100 125 TEMPERATURE (°C)

VOLTAGE-OUTPUT FULL-SCALE VOLTAGE

vs. TEMPERATURE

10.4850

10.4825

10.4800

FULL-SCALE VOLTAGE (V)

10.4775

10.4750

-50 25 50-25 0 75 100 125

UNIPOLAR VOLTAGE OUTPUT

BIPOLAR VOLTAGE OUTPUT

TEMPERATURE (°C)

4–20mA CURRENT OUTPUT

= V

DDCORE

DDV

= V

= +40V

SSV

= 0V

DDI

MIN INL

0.4

0.3

MAX5661 toc11b

0.2

0.1

DNL (LSB)

-0.1

-0.2

-0.3

-0.4

-50 -25 0 25 50 75 100 125

CURRENT-OUTPUT FULL-SCALE CURRENT

20.60 CURRENT OUTPUT = 0 TO 20mA

20.55

MAX5661 toc14

20.50

20.45

20.40

FULL-SCALE CURRENT (mA)

20.35

20.30

-50 25 50-25 0 75 100 125

DNL vs. TEMPERATURE

ALL MODES

MAX DNL

MIN DNL

TEMPERATURE (°C)

vs. TEMPERATURE

TEMPERATURE (°C)

MAX5661 toc12

MAX5661 toc15

-1

-2

ZERO-SCALE ERROR (LSB)

-3

-4

-5

4.0

3.6

3.2

2.8

2.4

2.0

1.6

1.2

SUPPLY CURRENT (mA)

0.8

0.4

ZERO-SCALE ERROR

vs. TEMPERATURE

CURRENT OUTPUT = 0 TO 20mA

UNIPOLAR VOLTAGE OUTPUT

BIPOLAR VOLTAGE OUTPUT

-50 25 50-25 0 75 100 125 TEMPERATURE (°C)

SUPPLY CURRENT vs. TEMPERATURE

(UNIPOLAR VOLTAGE OUTPUT)

VSSV

-50 -25 0 25 50 75 100 125

VDDV

VDDI

TEMPERATURE (°C)

VDDCORE

MAX5661 toc13

MAX5661 toc16

SUPPLY CURRENT vs. TEMPERATURE

(BIPOLAR VOLTAGE OUTPUT)

4.0

3.6

3.2

2.8

2.4

2.0

1.6

1.2

SUPPLY CURRENT (mA)

0.8

0.4

VSSV

-50 -25 0 25 50 75 100 125

VDDV

VDDI

TEMPERATURE (°C)

VDDCORE

MAX5661 toc17

SUPPLY CURRENT vs. TEMPERATURE

(0 TO 20mA CURRENT OUTPUT)

4.0

3.6

3.2

2.8

2.4

2.0

1.6

1.2

SUPPLY CURRENT (mA)

0.8

0.4

VSSV

-50 -25 0 25 50 75 100 125

VDDV

VDDI

TEMPERATURE (°C)

VDDCORE

MAX5661 toc18a

SUPPLY CURRENT vs. TEMPERATURE

(4–20mA CURRENT OUTPUT)

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

SUPPLY CURRENT (mA)

1.5

1.0 I

= 4mA

OUTI

0.5

= 500Ω

-50 -25 0 25 50 75 100 125 TEMPERATURE (°C)

VDDI

VSSV

VDDCORE

VDDV

MAX5661 toc18b

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 11

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

SUPPLY CURRENT vs. TEMPERATURE

(0 TO 20mA CURRENT OUTPUT)

4.0

3.6

3.2

2.8

2.4

2.0

1.6

1.2

SUPPLY CURRENT (mA)

0.8 I

= 0mA

OUTI

0.4 V

= V

DDI

DDCORE

-50 -25 0 25 50 75 100 125 TEMPERATURE (°C)

= +40V

VDDCORE

VDDI

UNIPOLAR VOLTAGE-OUTPUT,

s/div

ZS-TO-FS TRANSITION vs. C

CL = 100pF

400

SUPPLY CURRENT vs. TEMPERATURE

(4–20mA CURRENT OUTPUT)

6.0

5.5

5.0

MAX5661 toc18c

4.5

4.0

3.5

3.0

2.5

2.0

SUPPLY CURRENT (mA)

1.5

1.0 I

= 4mA

OUTI

0.5 V

= V

DDI

DDCORE

-50 -25 0 25 50 75 100 125

UNIPOLAR VOLTAGE-OUTPUT,

COMP

MAX5661 toc20

CL = 100nF

= 0.47µF

= 1µF

CL = 1.8µF

= 2kΩ

= 0nF)

CS 5V/div

OUTV 2V/div

ZS-TO-FS TRANSITION vs. C

TEMPERATURE (°C)

= +40V

VDDCORE

VDDI

400

s/div

COMP

CL = 100pF

CL = 1.8µF

MAX5661 toc18d

= 3.3nF)

MAX5661 toc21

= 0.47µF

= 1µF

= 2kΩ

CS 5V/div

OUTV 2V/div

DIGITAL SUPPLY CURRENT

vs. TEMPERATURE

(μA)

VCC

VCC = +5.25V

ALL INPUTS CONNECTED TO VCC

-50 0 25-25 50 75 100 125 TEMPERATURE (°C)

UNIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

COMP

CL = 100pF

CL = 100nF

RL = 2kΩ ZS-TO-FS TRANSITION

100μs/div

= 0nF)

MAX5661 toc22

MAX5661 toc19

CS 5V/div

OUTV 100mV/div

UNIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

400μs/div

= 0nF)

COMP

MAX5661 toc23

CL = 1μF R

= 2kΩ

ZS-TO-FS TRANSITION

CS 5V/div

OUTV 100mV/div

UNIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

400μs/div

= 3.3nF)

COMP

CL = 100pF

CL = 1μF

RL = 2kΩ ZS-TO-FS TRANSITION

MAX5661 toc24

CS 5V/div

OUTV 100mV/div

UNIPOLAR VOLTAGE-OUTPUT,

FS-TO-ZS TRANSITION (C

CL = 100nF

CL = 0.47μF

CL = 1μF

CL = 1.8μF

400μs/div

COMP

= 0nF)

MAX5661 toc25

RL = 2kΩ

CS 5V/div

OUTV 2V/div

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

12 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

UNIPOLAR VOLTAGE-OUTPUT,

FS-TO-ZS TRANSITION (C

= 3.3nF)

COMP

MAX5661 toc26

UNIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

= 0nF)

COMP

MAX5661 toc27

UNIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

COMP

= 3.3nF)

MAX5661 toc28

400

UNIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

400μs/div

RL = 2kΩ

CL = 100pF

CL = 0.47µF

CL = 1µF

CL = 1.8µF

s/div

= 0nF)

COMP

MAX5661 toc29

CL = 1μF RL = 2kΩ FS-TO-ZS TRANSITION

CS 5V/div

OUTV 2V/div

CS 5V/div

OUTV 100mV/div

CL = 100pF

CL = 100nF

100μs/div

BIPOLAR VOLTAGE-OUTPUT,

ZS-TO-FS TRANSITION (C

1.0ms/div

RL = 2kΩ FS-TO-ZS TRANSITION

= 0nF)

COMP

MAX5661 toc30

CL = 100nF

CL = 0.47µF

CL = 1µF

CL = 1.8µF

RL = 2kΩ

CS 5V/div

OUTV 100mV/div

CS 5V/div

OUTV 5V/div

CL = 100pF

CL = 1μF

400μs/div

BIPOLAR VOLTAGE-OUTPUT,

ZS-TO-FS TRANSITION (C

1.0ms/div

RL = 2kΩ FS-TO-ZS TRANSITION

= 3.3nF)

COMP

MAX5661 toc31

CL = 100pF

CL = 0.47µF

CL = 1µF

CL = 1.8µF

RL = 2kΩ

CS 5V/div

OUTV 100mV/div

CS 5V/div

OUTV 5V/div

BIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

100μs/div

= 0nF)

COMP

CL = 100pF

CL = 100nF

RL = 2kΩ ZS-TO-FS TRANSITION

MAX5661 toc32

CS 5V/div

OUTV 100mV/div

BIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

COMP

CL = 100pF

CL = 1μF

1.0ms/div

= 3.3nF)

MAX5661 toc33

RL = 2kΩ

CS 5V/div

OUTV 100mV/div

BIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

1.0ms/div

= 0nF)

COMP

MAX5661 toc34

CL = 1μF RL = 2kΩ ZS-TO-FS TRANSITION

CS 5V/div

OUTV 100mV/div

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 13

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

BIPOLAR VOLTAGE-OUTPUT,

FS-TO-ZS TRANSITION (C

CL = 100pF

CL = 0.47μF

CL = 1μF

CL = 1.8μF

1.0ms/div

BIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

COMP

CL = 100pF

CL = 1μF

RL = 2kΩ FS-TO-ZS TRANSITION

1.0ms/div

= 0nF)

COMP

MAX5661 toc35

CS 5V/div

OUTV 5V/div

RL = 2kΩ

= 3.3nF)

MAX5661 toc38

CS 5V/div

OUTV 100mV/div

FS-TO-ZS TRANSITION (C

SETTLING TIME (C

BIPOLAR VOLTAGE-OUTPUT,

= 3.3nF)

COMP

CL = 100pF

CL = 0.47µF

CL = 1µF

CL = 1.8µF

1.0ms/div

BIPOLAR VOLTAGE-OUTPUT

= 0nF)

COMP

CL = 1μF RL = 2kΩ FS-TO-ZS TRANSITION

1.0ms/div

MAX5661 toc36

RL = 2kΩ

MAX5661 toc39

CS 5V/div

OUTV 5V/div

CS 5V/div

OUTV 100mV/div

BIPOLAR VOLTAGE-OUTPUT

SETTLING TIME (C

CL = 100pF

COMP

CL = 100nF

RL = 2kΩ FS-TO-ZS TRANSITION

100μs/div

0 TO 20mA CURRENT-OUTPUT,

ZS-TO-FS TRANSITION vs. INDUCTIVE LOAD

LL = 0mH, LL = 100mH

400

s/div

= 0nF)

LL = 1H

MAX5661 toc37

CS 5V/div

OUTV 100mV/div

MAX5661 toc40

CS 5V/div

OUTI 4mA/div

0 TO 20mA CURRENT-OUTPUT,

ZS-TO-FS SETTLING TIME

LL = 0mH, LL = 100mH

s/div

400

LL = 1H

MAX5661 toc41

CS 5V/div

OUTV 200µA/div

0 TO 20mA CURRENT-OUTPUT,

FS-TO-ZS TRANSITION vs. INDUCTIVE LOAD

LL = 0mH

LL = 100mH

LL = 1H

2ms/div

MAX5661 toc42a

CS 5V/div

OUTI 4mA/div

0 TO 20mA CURRENT-OUTPUT,

FS-TO-ZS SETTLING TIME

LL = 0mH

LL = 100mH

2ms/div

MAX5661 toc42b

LL = 1H

CS 5V/div

OUTI 200µA/div

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

14 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

0 TO 20mA CURRENT-OUTPUT,

ZS-TO-FS TRANSITION vs. INDUCTIVE LOAD

MAX5661 toc43a

0 TO 20mA CURRENT-OUTPUT,

ZS-TO-FS SETTLING TIME

MAX5661 toc43b

0 TO 20mA CURRENT-OUTPUT,

FS-TO-ZS TRANSITION vs. INDUCTIVE LOAD

MAX5661 toc43c

LL = 0mH, 100mH LL = 1H

V V

400

s/div

0 TO 20mA CURRENT-OUTPUT,

FS-TO-ZS SETTLING TIME

LL = 0mH

DDI

DDV

2ms/div

OUTI OUTPUT CURRENT

vs. OUTPUT VOLTAGE

= V

DDI

DDCORE

= V

DDV

SSV

LL = 100mH

LL = 1H

= V

DDCORE

= V

SSV

= +40V

= 0V

MAX5661 toc43d

= +40V

= 0V

CS 5V/div

OUTI 4mA/div

CS 5V/div

OUTI 200µA/div

MAX5661 toc46

CS 5V/div

LL = 1H

OUTI

LL = 0mH, LL = 100mH

= V

DDI

= V

DDV

400

s/div

DDCORE

SSV

= 0V

200µA/div

= +40V

OUTV OUTPUT VOLTAGE

vs. LOAD CURRENT (SOURCING)

10.484

10.482

10.480

(V)

10.478

OUTV

10.476

10.474

10.472 12345678910

011

UNIPOLAR OUTV MODE

MAX5661 toc44

BIPOLAR OUTV MODE

SOURCE CURRENT (mA)

OUTI OUTPUT CURRENT

vs. OUTPUT VOLTAGE

MAX5661 toc47

100

(V)

OUTV

UNIPOLAR OUTV MODE

-20

-12 0-11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1

UNIPOLAR VOLTAGE-OUTPUT, POSITIVE MAJOR

CARRY TRANSITION GLITCH (C

= V

DDI

DDCORE

= V

DDV

SSV

= 0V

LL = 1H

LL = 100mH

LL = 0mH

2ms/div

OUTV OUTPUT VOLTAGE

vs. LOAD CURRENT (SINKING)

SINK CURRENT (mA)

COMP

MAX5661 toc48

= +40V

= 3.3nF)

CS 5V/div

OUTI 4mA/div

MAX5661 toc45

CS 5V/div

(mA)

OUTI

= V

DDCORE

0105152025

= +24V

DDI

OUTPUT VOLTAGE (V)

(mA)

OUTI

= V

DDCORE

0101520530354025 45

= +40V

DDI

OUTPUT VOLTAGE (V)

100µs/div

OUTV 1mV/div

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 15

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

UNIPOLAR VOLTAGE-OUTPUT, NEGATIVE MAJOR

CARRY TRANSITION GLITCH (C

100µs/div

COMP

= 3.3nF)

MAX5661 toc49

CS 5V/div

OUTV 1mV/div

UNIPOLAR VOLTAGE-OUTPUT, POSITIVE MAJOR

CARRY TRANSITION GLITCH (C

COMP

MAX5661 toc52

= 0nF)

CS 5V/div

BIPOLAR VOLTAGE-OUTPUT, POSITIVE MAJOR

CARRY TRANSITION GLITCH (C

UNIPOLAR VOLTAGE-OUTPUT, NEGATIVE MAJOR

CARRY TRANSITION GLITCH (C

100µs/div

COMP

= 3.3nF)

MAX5661 toc50

= 0nF)

MAX5661 toc53

CS 5V/div

OUTV 1mV/div

CS 5V/div

BIPOLAR VOLTAGE-OUTPUT, NEGATIVE MAJOR

CARRY TRANSITION GLITCH (C

100µs/div

BIPOLAR VOLTAGE-OUTPUT, POSITIVE MAJOR

CARRY TRANSITION GLITCH (C

= 3.3nF)

COMP

MAX5661 toc51

= 0nF)

COMP

MAX5661 toc54

CS 5V/div

OUTV 1mV/div

CS 5V/div

OUTV 50mV/div

4µs/div

BIPOLAR VOLTAGE-OUTPUT, NEGATIVE MAJOR

CARRY TRANSITION GLITCH (C

4µs/div

COMP

MAX5661 toc55

= 0nF)

CS 5V/div

OUTV 50mV/div

4µs/div

0 TO 20mA CURRENT-OUTPUT, POSITIVE

MAJOR CARRY TRANSITION GLITCH

100µs/div

MAX5661 toc56

OUTV 50mV/div

CS 5V/div

OUTI 2µA/div

4µs/div

0 TO 20mA CURRENT-OUTPUT, NEGATIVE

MAJOR CARRY TRANSITION GLITCH

100µs/div

MAX5661 toc57

OUTV 50mV/div

CS 5V/div

OUTI 2µA/div

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

16 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

4–20mA CURRENT-OUTPUT, POSITIVE

MAJOR CARRY TRANSITION GLITCH

100µs/div

MAX5661 toc58

CS 5V/div

OUTI 2µA/div

UNIPOLAR VOLTAGE-OUTPUT

DIGITAL FEEDTHROUGH

MAX5661 toc61

CS = V DIN = SCLK f = 1MHz

4–20mA CURRENT-OUTPUT, NEGATIVE

MAJOR CARRY TRANSITION GLITCH

100µs/div

DIN, SCLK 5V/div

OUTV 1mV/div

MAX5661 toc59

10,000

CS 5V/div

1000

(µA)

OUTI 2µA/div

VCC

100

BIPOLAR VOLTAGE-OUTPUT

DIGITAL FEEDTHROUGH

CS = V DIN = SCLK f = 1MHz

VCC SUPPLY CURRENT

vs. DIGITAL INPUT VOLTAGE

VCC = 5.25V

DIGITAL INPUT VOLTAGE (V)

MAX5661 toc62

DIN, SCLK 5V/div

OUTV 2mV/div

MAX5661 toc60

54321

200ns/div

CURRENT-OUTPUT

DIGITAL FEEDTHROUGH

200ns/div

MAX5661 toc63

CS = V

DIN = SCLK f = 1MHz

DIN, SCLK 5V/div

OUTI 2µA/div

FULL-SCALE CURRENT vs. FULL-SCALE

OUTPUT CURRENT TRIM CODE

27 26 25 24 23 22 21 20 19 18

FULL-SCALE CURRENT (mA)

17 16 15 14

0 1024

200ns/div

768512256

CODE

MAX5661 toc64

MAX5661

Pin Description

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 17

Typical Operating Characteristics (continued)

(

Typical Operating Circuit

, VCC= +5V, C

COMPI

= 22nF, V

DDV

= V

DDCORE

= +15V, V

SSV

= -15V, V

DDI

= +24V, V

REF

= +4.096V,

AGND

= V

DGND

= 0V, R

SERIES

= 47Ω, OUTV loaded with 2kΩ || 100pF to AGND, OUTI loaded with 500Ω to AGND, TA= +25°C.)

FULL-SCALE VOLTAGE (V)

0 1024

PIN NAME FUNCTION

1, 3, 5, 7, 8,

10, 15–20, 29–34, 36, 38, 42, 44, 46–52,

58, 61–64

2 OUTI DAC Current-Source Output. OUTI sources either from 0 to 20mA or from 4–20mA.

6 COMPI

9 OUTI4/0

11 REF

12 DACGND

13 DACGNDS

14 CNF1

21 CNF0

POSITIVE FULL-SCALE VOLTAGE

vs. FULL-SCALE OUTPUT TRIM CODE

UNIPOLAR OR BIPOLAR MODE

CODE

768512256

MAX5661 toc65

N.C. No Connection. Not internally connected.

DAC Current-Output Positive Supply. Connect V

DDI

+40V to power the DAC current-output (OUTI) buffer. Bypass V AGND, as close as possible to the device.

OUTI Noise-Limiting Capacitor Connection. Connect a 22nF capacitor from COMPI to V reduce transient noise at OUTI.

Current-Output Range Selection Input. Connect OUTI4/0 to AGND to select the 0 to 20mA OUTI current-output range. Connect OUTI4/0 to V The OUTI current range can also be set by software. When using software to set the OUTI current range, connect OUTI4/0 to AGND.

Buffered Voltage Reference Input. Connect an external +4.096V voltage reference to REF. Bypass REF with a 0.1µF capacitor to DACGND, as close as possible to the device. Use a 1kΩ resistor in series to the reference input for optimum performance.

DAC Analog Ground. Connect DACGND, DACGNDS, DUTGND, and DUTGNDS together on a low-noise ground plane with a star connection.

DAC Analog Sense Ground. Connect DACGND, DACGNDS, DUTGND, and DUTGNDS together on a low-noise ground plane with a star connection.

Voltage/Current Configuration Input. CNF1 and CNF0 control the OUTV and OUTI outputs. See Tables 13 and 14.

Voltage/Current Configuration Input. CNF0 and CNF1 control the OUTV and OUTI outputs. See Tables 13 and 14.

NEGATIVE FULL-SCALE VOLTAGE

vs. FULL-SCALE OUTPUT TRIM CODE

-6

-7

-8

-9

-10

-11

FULL-SCALE VOLTAGE (V)

-12

-13

-14 0 1024

CODE

768512256

MAX5661 toc66

to a power supply between +13.48V and

DDI

to select the 4–20mA OUTI current-output range.

DDI

with a 0.1µF capacitor to

DDI

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

18 _______________________________________________________________________________________

Pin Description (continued)

PIN NAME FUNCTION

22 DIN Serial-Data Input. Data is clocked into the serial interface on the rising edge of SCLK.

23 SCLK Serial-Clock Input

24 CS

25 DGND Digital Ground

26 V

27 LDAC

28 FAULT

35 DOUT

37 CLR

39 V

40 DUTGNDS

41 DUTGND

43 COMPV

45 AGND Analog Ground

53 SVP

54, 59 I.C. Internal Connection. Leave unconnected.

55 V

56 OUTV

57 V

60 SVN Rem ote V ol tag e S ense Inp ut. C onnect to the top ter m i nal of R

DDCORE

SSV

DDV

Active-Low Chip-Select Input. Drive CS low to enable the serial interface. Drive CS high to disable the serial interface. DOUT is high impedance when CS is high.

Digital Power Supply. Connect V with a 0.1µF capacitor to DGND, as close as possible to the device.

Active-Low Asynchronous Load DAC Input. Drive LDAC low to transfer the contents of the input register to the DAC register to immediately update the output. Connect LDAC to V

Active-Low Open-Drain Fault Output. FAULT asserts low for an OUTI open-circuit condition, an OUTV short-circuit condition, or when the CLR input is low (see Table 12 and Figure 9).

Serial Data Output. Data transitions at DOUT on SCLK’s falling edge. DOUT is high impedance when CS is high. Use DOUT to read the shift register contents or for daisy chaining multiple MAX5661 devices.

Active-Low Clear Input. Drive CLR low to set the DAC code to the value stored in the clear register, to 0V in voltage mode, or 0mA/4mA depending on the output current mode. Program the contents of the clear register through the serial interface. Enable and disable the CLR input through the control register’s CLREN bit (see Table 4).

DAC Core Positive Supply. Connect V with a 0.1µF capacitor to AGND, as close as possible to the device.

DUT Analog Sense Ground. Connect DACGND, DACGNDS, DUTGND, and DUTGNDS together on a low-noise ground plane with a star connection.

DUT Analog Ground. Connect DACGND, DACGNDS, DUTGND, and DUTGNDS together on a low-noise ground plane with a star connection.

OUTV Amplifier Compensation Feedback Node. Connect a 3.3nF capacitor from OUTV to COMPV when OUTV drives capacitive loads of up to 1.2µF. Leave COMPV open for faster response time.

Remote Ground Sense Input. Connect SVP to the bottom terminal of R Operating Circuit.

D AC V ol tag e- Outp ut N eg ati ve P ow er S up p l y. Al w ays connect V and -15.75V. Bypass V

DAC Unipolar/Bipolar Voltage Output. OUTV provides 0 to +10.48V in unipolar mode and -10.48V to +10.48V in bipolar mode.

DAC Voltage-Output Positive Power Supply. Connect V and +15.75V. Bypass V

with a 0.1µF capacitor to AGND, as close as possible to the device.

SSV

DDV

to a power supply between +4.75V and +5.25V. Bypass V

or V

DDCORE

with a 0.1µF capacitor to AGND, as close as possible to the device.

to V

DDI

(see Table 16). Bypass V

DDV

. See the Typical

OUTV

to a p ow er sup p l y b etw een - 13.48V

S S V

to a power supply between +13.48V

DDV

. S ee the Typ i cal Op er ati ng C i r cui t.

OU T V

if unused.

DDCORE

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 19

Detailed Description

The MAX5661 single 16-bit DAC with precision high-voltage amplifiers provides a complete solution for programmable current and voltage-output applications. The programmable output amplifiers swing to industry-standard voltage levels of ±10V or current levels from 0mA (or from 4mA) to 20mA. The OUTV voltage output drives resistive loads greater than 2kΩ and capacitive loads up to 1.2µF. Force and sense connections on the voltage output compensate for series protection resistors and field wiring resistance. Short-circuit protection on the voltage output limits output current. The OUTI current output drives resistive loads from 0Ω and higher, up to a compliance voltage of (V

DDI

- 2.5V). The OUTI current

output also drives inductive loads up to 1H.

The MAX5661 provides a current output or a voltage output, with only one output active at any given time. The MAX5661 operates with ±13.48V to ±15.75V dual supplies (V

DDV

, V

SSV

) for the voltage output and a

+13.48V to +40V single supply (V

DDI

) for the current output (see Table 16). The +4.75V to +5.25V digital supply (VCC) powers the digital circuitry and V

DDCORE

powers the rest of the internal analog circuitry. A buffered reference input accepts a +4.096V reference voltage.

The LDAC and CLR inputs asynchronously update the DAC outputs. CLR sets the DAC code to the value stored in the clear register (software clear), or to zero scale (hardware clear). The FAULT output asserts for an open-circuit current output, a short-circuit voltage output, or a clear state condition when CLR is low. The power-on reset circuitry guarantees the outputs remain off at power-up and all register bits are set to zero to ensure a glitchless power-up sequence.

A 10MHz SPI-/QSPI-/MICROWIRE-compatible serial interface programs the DAC outputs and configures the device. The DOUT output allows shift-register reads or daisy chaining of several devices. The double-buffered interface includes an input register and a DAC register. Use software commands or the asynchronous LDAC input to transfer the input register contents to the DAC register and update the DAC outputs.

4-Wire SPI-Compatible Serial Interface

The MAX5661 communicates through a serial interface compatible with SPI, QSPI, and MICROWIRE devices. For SPI, ensure that the SPI bus master (typically a

microcontroller (µC)) runs in master mode to generate the serial-clock signal. Set the SCLK frequency to 10MHz or less, and set the clock polarity (CPOL) and phase (CPHA) in the µC control registers to the same value. The MAX5661 operates with SCLK idling high or low, and thus operates with CPOL = CPHA = 0 (see Figure 2) or CPOL = CPHA = 1 (see Figure 3). Force CS low to input data at DIN on the rising edge of SCLK. Output data at DOUT updates on the falling edge of SCLK (see Figure 1).

A high-to-low transition on CS initiates the 24-bit data input cycle. Once CS is low, write an 8-bit command byte (MSB first) at DIN to send data to the appropriate internal register (see Tables 1, 2, and 3). C7 is the MSB of the command byte and C0 is the LSB. Following the command byte, write 2 data bytes containing bits D15–D0. D15 is the MSB of the 2 data bytes and D0 is the LSB (see Figure 4 and the

sec-

tion). Data loads into the shift register 1 bit at a time.

Write the data as one continuous 24-bit stream, always keeping CS low throughout the entire 24-bit word. The MAX5661 stores the 24 most recent bits received, including bits from previous transmission(s). Ensure SCLK has 24 rising and falling edges between CS falling low to CS returning high. Data loads into the shift register on the rising edge of SCLK. Once CS returns high, data transfers from the shift register into the appropriate internal register.

When reading data, write an 8-bit command byte and 16 data bits at DIN. On the following 24-bit sequence, read out the shift register’s contents (command byte and the 16 data bits) at DOUT (see Figure 5). Data transitions at DOUT on the falling edge of SCLK. While reading data at DOUT on the second 24-bit sequence, load another command byte and 2 data bytes at DIN or write a no-operation command. DOUT three-states when CS is high. The DAC outputs update on the rising edge of CS after writing to the DAC register or by pulling LDAC low.

Daisy chain multiple devices by connecting the first DOUT to the second DIN, and so forth. Daisy chaining allows communication with multiple MAX5661 devices using single CS and SCLK signals. See the

Daisy

Chaining Multiple MAX5661 Devices

section.

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

20 _______________________________________________________________________________________

Figure 3. SPI-Interface Timing Diagram (CPOL = CPHA = 1)

Figure 2. MICROWIRE- or SPI-Interface Timing Diagram (CPOL = CPHA = 0)

SCLK

DIN

DOUT

BITS WITH CAPITAL LETTERS REPRESENT DATA BEING WRITTEN TO THE SHIFT REGISTER. BITS WITH LOWERCASE LETTERS REPRESENT DATA IN THE SHIFT REGISTER FROM THE PREVIOUS 24-BIT CYCLE.

SCLK

DIN

DOUT

p IS DATA LEFT FROM THE PREVIOUS INSTRUCTION CYCLE.

BITS WITH CAPITAL LETTERS REPRESENT DATA BEING WRITTEN TO THE SHIFT REGISTER. BITS WITH LOWERCASE LETTERS REPRESENT DATA IN THE SHIFT REGISTER FROM THE PREVIOUS 24-BIT CYCLE.

C7 C6 C5 C4 D3 D2 D1 D0

c7 c6 c5 c4 d3 d2 d1 d0 C7

C7 C6 C5 C4 D3 D2 D1 D0

c7 c6 c5 c4 d3 d2 d1 d0

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 21

Table 1. Input Command Bits

Table 2. Register Description

The MAX5661 communicates between its internal registers and the external bus lines through the 4-wire SPI-/QSPI-/MICROWIRE-compatible serial interface. Table 1 details the command bits (C7–C0) and the data bits (D15–D0) of the serial input word. Tables 2 and 3 detail the command byte and the subsequent register accessed. Tables 4–8 detail the various read/write internal registers and their power-on reset states. When

updating the DAC register, allow 5µs before sending the next command.

Control Register (Read/Write)

Write to the control register to enable the current or voltage output, set the voltage output for unipolar or bipolar

mode, and set the current-output range. The control register also initializes the clear and fault modes. Set the command byte to 0x01 to write to the control register. Set the command byte to 0x02 to read from the control register. Write or read data bits D15–D5. D4–D0 are don’t-care bits for a write operation. D4, D3, and D2 are read-only bits. D1 and D0 are don’t-care bits for a read operation (see Table 4).

Set the OUTVON bit (D15) to 1 to enable the OUTV DAC voltage output. Set the OUTION bit (D14) to 1 to enable the OUTI DAC current output. Always set bit D13 to 0. Set the B/U bit (D12) to determine whether the OUTV output operates in bipolar mode (B/U = 0) or unipolar mode (B/U = 1).

X = Don’t care. All other commands are reserved for factory use. Do not use.

24-BIT SERIAL INPUT WORD

COMMAND BYTE DATA BITS

MSB LSB

C7 C6 C5 C4 C3 C2 C1 C0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

COMMAND BITS

C7 C6 C5 C4 C3 C2 C1 C0

X X X X 0 0 0 0 No operation. Transfer shift register’s data to DOUT.

X X X X 0 0 0 1 Write control register.

X X X X 0 0 1 0 Read control register.

X X X X 0 0 1 1 Load input register. DAC register unchanged.

X X X X 0 1 0 0 Load DAC and input register.

XXXX0101

X X X X 0 1 1 0 Write clear register.

X X X X 0 1 1 1 Read input register.

X X X X 1 0 0 0 Read DAC register.

X X X X 1 0 0 1 Read clear register.

X X X X 1 1 1 1 No operation. Transfer shift register’s data to DOUT.

Load DAC register. Transfer input register data to DAC register. DAC outputs update on CS’s rising edge.

OPERATION

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

22 _______________________________________________________________________________________

Table 3. Register Bit Descriptions

OPERATION

No operation. Transfer shift-

to DOUT.

No operation. Transfer shift-

to DOUT.

Write control

Read control

Load input

Load DAC register

from input

Write clear

Read input register

Read DAC

Read clear

Write full-scale

output trim

DESCRIPTION

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

Data in shift register

before CS driven high and

command executed

Data in shift register

after CS driven high and

command executed

C7 C6 C5 C4 C3 C2 C1 C0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

COMMAND BYTE 1ST DATA BYTE 2ND DATA BYTE

0000

1111

XXXXX

0001

XXXX

XXXX0010 XXXXX

XXXX0011

XXXX0100

XXXX0101XX XXXXXX XXXXX XXX

XXXX0110 MSB <-- 16-Bit Clear-Register Data --> LSB

0111XX XXXXXX XXXXX XXX

XXXX

Same as line above.

1000XX XXXXXX XXXXX XXX

XXXX

Same as line above.

XXXX

1001XX XXXXXX XXXXX XXX

Same as line above.

XXXX

10101XX XX X

Same as line above.

XXXXXXXXX

Same as line above. Shift-register data not changed by this operation.

XXXXXXXXXX

Same as line above. Shift-register data not changed by this operation.

OUTIONOUTION

OUTVONOUTVON

Same as line above. Shift-register data not changed by this operation.

XXXX XXXXXXX

Same as line above. Shift-register data not changed by this operation.

XXXXX

FS_ EN

B/UB/U

OUTI4/0

MSB <-- 16-Bit DAC Clear Register Data --> LSB

CLRENCLREN

CLRMODECLRMODE

14 to 20 BIT

14 to

20 BIT

MSB <-- 16-Bit DAC Data --> LSB

MSB <-- 16-Bit Input-Register Data --> LSB

MSB <-- 16-Bit DAC-Register Data --> LSB

XXXX XXX XXX

FS_ BIT 8

FS_ BIT 9 (MSB)

XXXX XXX

XXXXXX

FAULTENFAULTEN

FS_ BIT 6

CLRFLAGENCLRFLAGEN

FS_ BIT 5

FAULTV

FS_ BIT 4

FAULTI

FS_ BIT 3

CLEARST

FS_ BIT 2

RCLRRCLR

FS_ BIT 7

FS_ BIT 1

XXXX

XXSame as line above.

FS_ BIT 0 (LSB)

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 23

Set the OUTI4/0EN bit (D11) low to enable the OUTI4/0 hardware input. Set the I4TO20BIT bit (D10) high to select the current-output range through the software. Set the CLREN bit (D9) low to enable the CLR hardware input. Set the CLRMODE bit (D8) high to force the output to the value in the clear register or the zero state when the CLR hardware input is pulled low. Set the RCLR bit (D7) high to remain in the clear state. Set the FAULTEN bit (D6) high to enable the FAULT output

functionality. Set the CLRFLAGEN bit (D5) high to activate the FAULT output when the MAX5661 is in the clear state.

Bits D4, D3, and D2 are read-only bits. The FAULTV bit (D4) is set to 1 when OUTV is short circuited. The FAULTI bit (D3) is set to 1 when OUTI is open circuited. The CLEARST bit (D2) is set to 1 when the MAX5661 is in the clear state.

Figure 4. Write Timing

Figure 5. Read Timing

DIN CLOCKED IN ON THE

SCLK RISING EDGE

SCLK

DIN

SCLK

DIN

DOUT

WRITE COMMAND EXECUTED

C7 C6 C5 C4 C0 D15 D14 D13 D0

READ COMMAND EXECUTED

C7 C6 C5 C4 C0 D15 D14 D13 D0

DOUT READY

SCLK

DIN

DOUT

X = DON'T CARE.

XXXX XXXX X

C7 C6 C5 C4 C0 D15 D14 D13 D0

DOUT TRANSITIONS ON THE FALLING SCLK EDGE

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

24 _______________________________________________________________________________________

Table 4. Control Register (Read/Write)

BIT NAME

OUTVON D15 0 DAC OUTV output enable bit. Set to 1 to enable the OUTV output.

OUTION D14 0 DAC OUTI output enable bit. Set to 1 to enable the OUTI output.

— D13 0 Reserved. Always set to 0.

B/U D12 0

OUTI4/0EN D11 0

I4TO20BIT D10 0

CLREN D9 0

CLRMODE D8 0

RCLR D7 0

FAULTEN D6 0

CLRFLAGEN D5 0 C l ear fl ag enab l e. S et to 1 to enab l e the FAU LT outp ut to r ep or t w hen the d evi ce i s i n the cl ear state.

FAULTV D4 0

FAULTI D3 0

CLEARST D2 0

X D1, D0 0 Not used.

DATA

BIT

RESET

STATE

FUNCTION

Voltage-output unipolar/bipolar mode select bit. Set to 0 (default power-up state) to select the bipolar output range (±10.48V). Set to 1 to select the unipolar output range (0 to +10.48V).

OUTI4/0 enable bit. Set to 0 (default power-up state) to enable the OUTI4/0 hardware input. Set to 1 to disable the OUTI4/0 hardware input, thereby controlling the current-output range through software commands.

OUTI current range bit. Set to 0 to set the OUTI current range from 0 to 20mA. Set to 1 to set the OUTI current range from 4–20mA.

Clear enable bit. Set to 0 to enable the external CLR input. Set to 1 to disable the external CLR input.

Clear mode bit. Set to 1 and drive the external CLR input low to force the DAC output to the value stored in the clear register. Set to 0 and drive the external CLR input low to force the DAC output to 0V in voltage mode or 0mA/4mA depending on output-current mode.

Remain in clear bit. Set to 1 to remain in the clear state. The RCLR bit determines the steps

CLR

required to exit the clear state. See the

Fault output enable. Set to 1 to enable the FAULT output functionality. Set to 0 to disable the FAULT output functionality.

Output voltage fault bit (read only). The FAULTV bit is set to 1 when FAULT triggers due to an OUTV short-circuit condition. The FAULTV bit is a don’t-care bit for control-register write commands.

Output-current fault bit (read only). The FAULTI bit is set to 1 when FAULT triggers due to an OUTI open-circuit condition. The FAULTI bit is a don’t-care bit for the control register write commands.

C l ear state b i t ( r ead onl y) . The C LE ARS T b i t i s set to 1 w hen CLR i s l ow and C LRE N = 0. The C LRS T b i t i s a d on’ t- car e b i t for contr ol r eg i ster w r i te com m and s.

Input section.

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 25

Input Register (Read/Write)

Write to the input register to store the DAC code. Transfer the value written to the input register to the DAC register by pulling the LDAC input low or by writing to the load DAC register (0x05). Set the command byte to 0x03 to write to the input register. Set the command byte to 0x07 to read from the input register. Bits D15–D0 contain the straight binary data (see Table 5).

DAC Register (Read/Write)

Write to the DAC register to update the OUTV and OUTI outputs after CS returns high. Set the command byte to 0x04 to write to the DAC register. Set the command byte to 0x08 to read from the DAC register. Bits D15–D0 contain the straight binary data (see Table 6).

Load DAC Register (Write)

Write to the load DAC register to transfer the input register data to the DAC register and update the DAC out-

put. Set the command byte to 0x05 to write to the load DAC register. Bits D15–D0 are don’t-care bits.

Clear Register (Read/Write)

Write to the clear register to set the DAC output value when the CLR hardware input is pulled low (forcing the MAX5661 into the clear state). Set the command byte to 0x06 to write to the clear register. Set the command byte to 0x09 to read the clear register. Bits D15–D0 contain the straight binary data (see Table 7).

No Operation

Set the command byte to 0x0F or 0x00 to perform a nooperation command. After writing the command byte and 2 data bytes (16 don’t-care bits), read out the shift register’s contents on the following 24-bit cycle.

Table 5. Input Register (Read/Write)

Table 6. DAC Register (Read/Write)

Table 7. Clear Register (Read/Write)

Table 8. Full-Scale Output Trim Register (Write)

BIT NAME DATA BIT RESET STATE FUNCTION

0000 0000 0000 0000

IN15–IN0 D15–D0

(unipolar/current)

1000 0000 0000 0000

(bipolar)

IN15 is the MSB and IN0 is the LSB. Data format is straight binary.

BIT NAME DATA BIT RESET STATE FUNCTION

0000 0000 0000 0000

DAC15–DAC0 D15–D0

(unipolar/current)

0000 0000 0000 0000

(bipolar)

DAC15 is the MSB and DAC0 is the LSB. Data format is straight binary.

BIT NAME DATA BIT RESET STATE FUNCTION

0000 0000 0000 0000

CLR15–CLR0 D15–D0

(unipolar/current)

1000 0000 0000 0000

(bipolar)

CLR15 is the MSB and CLR0 is the LSB. Data format is straight binary.

BIT NAME DATA BIT RESET STATE FUNCTION

FS_EN +

FS_BIT9–

FS_BIT0

D9–D0 0000 0000 0000 0000

FS_EN (D15) enables the full-scale output adjustment feature. D9 is the MSB and D0 is the LSB. D9 is straight binary, D8–D0 are inverted binary.

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

26 _______________________________________________________________________________________

Table 9. N to D: Full-Scale Output Trim Register Bits Map

Table 10. Full-Scale Output Variation vs. N and B

Figure 6. Transfer Function of Bits (B) to Numerical (N) Representation

Full-Scale Output

Current Trim Register (Write)

Write to the full-scale output trim register to adjust the output voltage or current ±25%. Set command bits to 0x06 to write to the output trim register. Bit 15 enables the output trim register. Bits D9–D0 program the 10-bit trim DAC (Table 8).

N9 N8 N7 N6 N5 N4 N3 N2 N1 N0

D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

DECIMAL

VALUE (N)

0 511 -25

256 255 -12.5

511 0 0

512 1023 0

767 768 +12.5

1023 512 +25

BIT DECIMAL

VALUE (B)

% CHANGE

BITS (B) TO NUMERICAL (N)

TRANSFER FUNCTION

1100

1000

900

800

700

600

500

NUMBER (N)

400

300

200

100

0 1100

BITS (B)

MAX5661 fig06

+25%

+12.5%

-12.5%

-25%

1000900700 800200 300 400 500 600100

% CHANGE FULL-SCALE OUTPUT

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 27

Figure 7. Functional Diagram

Figure 8. LDAC Timing

Reference Input

Connect an external voltage reference in the +4V to +4.2V range through a 1kΩ series resistor to the buffered REF input. Use a high-accuracy, lownoise +4.096V voltage reference such as the MAX6126AASA41 (3ppm/°C temperature drift and

0.02% initial accuracy) for best 16-bit static accuracy. REF does not accept AC signals. See Table 17 for a listing of +4.096V references.

LDAC

Input

The MAX5661 features an active-low load DAC (LDAC) logic input that allows asynchronous updates to the DAC outputs. Drive LDAC high to VCCduring normal operation while controlling the MAX5661 using only the serial interface. Drive LDAC low to update the DAC output with the input register data. Hold LDAC low to make the input register transparent and immediately update the DAC output with the input register data. Figure 8 shows the LDAC timing with respect to OUT_.

LDAC

SOFTWARE

LOAD DAC

CONTROL

SCLK

DIN

DOUT

SHIFT

MAX5661

INPUT

CLEAR

DAC

FULL-SCALE

ADJUST

DAC

2-TO-1

MUX

FULL-SCALE

OUTPUT ADJUST

TO OUTPUT

CIRCUITRY

OUTI

OUTV

LDAC

OUT_

LDL

± 2 LSB

DELAY

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

28 _______________________________________________________________________________________

CLR

Input

The active-low external CLR input asynchronously sets the DAC code to the value in the clear register (software clear) or to the zero state (hardware clear), depending on the control register’s CLRMODE bit setting (see Tables 4 and 11). Set the CLRMODE bit to 1 and drive external CLR low to force the output to the value stored in the clear register. Set the CLRMODE bit to 0 and drive the external CLR input low to force the output to the zero state. The zero state value is 0mA in 0 to 20mA current mode, 3.97mA in 4–20mA current mode, or 0V in voltage mode (unipolar or bipolar).

Disable the external CLR input functionality by setting the control register’s CLREN bit to 1. Set the CLREN bit to 0 to enable the external CLR input functionality.

After setting the CLREN bit to 0, force the external CLR input low to set the MAX5661 into the clear state. The control register’s read-only CLEARST bit is set to 1 while in the clear state. The RCLR (remain in clear) bit determines the steps required to exit the clear state.

With the RCLR bit set to 1, exit the clear state in one of three ways:

1) Pull the external CLR input high and then write to

the DAC register (0x04) or the load DAC register (0x05) or force LDAC low.

2) Pull the external CLR input high and set the RCLR

bit low.

3) Initiate a power-on reset (POR) to reset the RCLR bit

to 0.

With the RCLR bit set to 0, exit the clear state one of three ways:

1) Set the CLREN bit high.

2) Pull the external CLR input high.

3) Initiate a power-on reset (POR).

FAULT

Output

The open-drain active-low FAULT output asserts low for a current-output open circuit or dropout condition, for a voltage-output short circuit, or when the MAX5661 is in the clear state (see the

CLR Input

section).

Enable and disable the FAULT output with the control register’s FAULTEN and CLRFLAGEN bits (see Tables 4, 12, and Figure 9). Set the FAULTEN bit to 1 to enable the FAULT output to report fault conditions on OUTV and OUTI. Set FAULTEN to 0 to disable the FAULT out- put for fault conditions on OUTV and OUTI. Set the CLRFLAGEN bit to 1 to enable the FAULT output to report when the device is in the clear state. Set CLRFLAGEN to 0 to disable a hardware indication of the clear state. The FAULT output asserts low if CLRFLAGEN = 1 and CLEARST = 1.

Read the control register to determine the source of a FAULT output condition. The FAULTV read-only bit is set to 1 when the voltage output (OUTV) is shortcircuited. The FAULTI bit is set to 1 when the current output (OUTI) is open circuited or in a dropout condition (V

DDI

- V

OUTI

at 1.3V typ). The FAULT output asserts

low if FAULTEN is set to 1 and either the FAULTV bit or FAULTI bit is set to 1.

Table 11. Hardware-Clear and Software-Clear Truth Table

X = Don’t care.

Zero state is 0V in unipolar voltage mode, -10.48V in bipolar voltage mode, and 0mA/4mA depending on output-current mode.

CLEARST BIT

(READ)

0 (not in clear state) X X X

1 (in clear state) 0 DAC code set to zero state* —

1 (in clear state) 1 — DAC code set by clear register data

CLRMODE BIT (READ/WRITE)

HARDWARE CLEAR SOFTWARE CLEAR

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 29

Figure 9. FAULT Output Logic Diagram

Table 12. FAULT Output Truth Table

X = Don’t care. Only one output (OUTV or OUTI) is active at a time.

FAULTEN BIT

FAULT_AT_

OUTPUT

INTERNAL

FAULT SIGNAL

FAULTI BIT

FAULTV BIT

FAULTI BIT

FAULTEN BIT

FAULTV BIT

CLRFLAGEN

CLEARST BIT

FAULT_AT_OUTPUT

CANNOT BE READ)

(INTERNALLY

GENERATED,

FAULT_AT_

OUTPUT

INTERNAL FAULT SIGNAL

INTERNAL

FAULT SIGNAL

(INTERNALLY GENERATED,

CANNOT BE READ)

CLRFLAGEN

BIT

CLEAR_FLAG

CLEARST

CLEAR_

FLAG

BIT

FAULT

OUTPUT

FAULT

OUTPUT

CLEAR_

FLAG

X = DON'T CARE.

OUTV SHORT

CIRCUITED

No No 0 X X High

No No X X 0 High

X X 1 X 1 Low

X X 0 0 X High

No Yes X 1 X Low

X X X 0 0 High

Yes No X 1 X Low

OUTI OPEN CIRCUITED

OR IN DROPOUT

CLEARST

BIT

FAULTEN BIT CLRFLAGEN BIT FAULT OUTPUT

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

30 _______________________________________________________________________________________

Output Configurations

The CNF0, CNF1, and OUTI4/0 hardware inputs determine whether the hardware or software controls the MAX5661 DAC outputs (see Table 13). The CNF0 and CNF1 inputs enable and disable the DAC outputs or allow software control of the outputs (see Table 14). The OUTI4/0 input sets the current range of the OUTI output. Hardware inputs take precedence over the software commands.

The V

digital supply powers the CNF1, CNF0, and

OUTI4/0 inputs. If VCC= 0V, the DAC outputs enter the zero state and all register bits are set to 0. The zero state of the voltage output (OUTV) is 0V. The zero state of the current output (OUTI) is 0mA when OUTI4/0 = AGND or 4mA when OUTI4/0 = V

DDI

Table 13. Output Configuration

CONTROL

SIGNAL

CNF1 Hardware input

CNF0 Hardware input

OUTI4/0 Hardware input Sets the OUTI current range.

OUTI4/0EN Software bit

OUTVON Software bit

OUTION Software bit

B/U Software bit

I4TO20BIT Software bit

HARDWARE

INPUT/SOFTWARE BIT

DESCRIPTION DETAILS

Enables/disables the DAC

OUTV and OUTI outputs.

Enables and disables the

OUTI4/0 input.

Enables and disables the

DAC OUTV and OUTI

Sets the voltage output to

unipolar mode or bipolar

Sets the OUTI current range

through software.

outputs.

mode.

CNF1, CNF0: 00 = both outputs disabled 01 = OUTI active, set to 0 to 20mA range 10 = OUTV active, set to bipolar mode 11 = outputs controlled by serial interface

S et the OU TI4/0E N b i t to 0 ( d efaul t p ow er - up state) to enab l e the O U TI4/0 har d w ar e i np ut. C onnect the OU TI4/0 har d w ar e i np ut to AGN D to set the OU TI cur r ent r ang e to 0 to 20m A. C onnect the O U TI4/0 har d w ar e i np ut to V cur r ent r ang e to 4–20m A. S et the OU TI4/0E N b i t to 1 to d i sab l e the O U T14/0 har d w ar e i np ut. C onnect OU TI4/0 to AGN D w hen contr ol l i ng the cur r ent outp ut thr oug h softw ar e.

Set the OUTI4/0EN bit to 0 (default power-up state) to enable the OUTI4/0 hardware input. Set to 1 to disable the OUTI4/0 hardware input.

When the CNF1 and CNF0 hardware inputs are high, the OUTION and OUTVON bits control the DAC output OUTI and OUTV settings. OUTVON, OUTION: 00 = both outputs powered down 01 = OUTI active 10 = OUTV active 11 = both outputs powered down

Set B/U to 0 to set the OUTV output to bipolar mode (±10.48V). Set B/U to 1 to set the OUTV output to unipolar mode (0 to +10.48V).

Set I4TO20BIT to 0 to set the OUTI current range from 0 to 20mA. Set I4TO20BIT to 1 to set the OUTI current range from 4–20mA.

to set the O U TI

D D I

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 31

CNF0/CNF1 Hardware Inputs

The CNF0 and CNF1 inputs enable the DAC’s voltage (OUTV) or current (OUTI) outputs. Drive CNF0 and CNF1 low to disable both the OUTV and OUTI outputs. Drive CNF0 high and CNF1 low to enable the OUTI output. Drive CNF0 low and CNF1 high to enable the OUTV output. Drive CNF0 and CNF1 high to control the OUTV and OUTI outputs through the serial interface. Table 14 summarizes the output behavior when programmed by the CNF0/CNF1 hardware inputs.

OUTI Current-Output Configuration

Drive CNF0 high and CNF1 low to enable the OUTI output through the hardware. Alternatively, drive CNF0 and CNF1 high to control OUTI with the serial interface. With CNF1 and CNF0 high, the control register’s OUTION bit enables the OUTI output. Set OUTION to 1 to enable the OUTI output. Set OUTION to 0 (default power-up state) to disable the OUTI output.

The OUTI current output derives power from V

DDI

and

DDCORE

(+13.48V to +40V). Connect V

DDCORE

DDI

when using the OUTI output.

The control register’s OUTI4/0EN bit (see Tables 4 and

13) determines whether the OUTI4/0 hardware input or the control register’s I4TO20BIT bit controls the OUTI current range. Set the OUTI4/0EN bit to 0 (default power-up state) to control the current range through the OUTI4/0 hardware input. Connect the OUTI4/0 hardware input to AGND to select the 0 to 20mA mode. Connect the OUTI4/0 hardware input to V

DDI

to select

the 4–20mA mode. Set the OUTI4/0EN bit to 1 to allow software control of

the OUTI current range through the I4TO20BIT bit (see Table 13). Set I4TO20BIT to 0 to select the 0 to 20mA mode. Set I4TO20BIT to 1 to select the 4–20mA mode.

OUTV Voltage-Output Configuration

Drive CNF0 low and CNF1 high to enable the OUTV output through the hardware (see Table 14). Alternatively, drive CNF0 and CNF1 high to control OUTV with the serial interface. With CNF1 and CNF0 high, the control register’s OUTVON bit enables the OUTV output. Set OUTVON to 1 to enable the OUTV output. Set OUTVON to 0 (default power-up state) to disable the OUTV output.

The OUTV output derives power from V

DDV

, V

SSV

, and

DDCORE

. Connect V

DDCORE

to V

DDV

(+13.48V to +15.75V) when using the OUTV output. Always connect a negative supply to V

SSV

(-13.48V to -15.75V) (see

Table 16). The control register’s B/U bit sets OUTV for bipolar or

unipolar mode. Set B/U to 0 (default power-up state) to select the bipolar output range (±10.48V). Set B/U to 1 to select the unipolar output range (0 to +10.48V).

Output Transfer Functions

The DAC output voltage/current is a function of the various hardware control inputs and digital inputs in the control register (see Table 13). The transfer functions below assume that the outputs are on, and a reference voltage of +4.096V is applied to the reference input. For the voltage output, the sense input is at the same potential as the DAC output (OUTV = SVP and AGND = SVN). Table 15a details the bipolar output voltage transfer function. Table 15b details the unipolar output voltage transfer function. Table 15c details the 0 to 20mA current-range transfer function. Table 15d details the 4mA to 20mA current-range transfer function.

Table 14. CNF1/CNF0 Hardware Settings

CNF1 CNF0 OUTV, OUTI SETTING

DGND DGND Both DAC outputs disabled.

DGND V

DGND OUTV enabled. OUTI disabled.

OUTI enabled. OUTV disabled.

DAC outputs controlled by the serial interface.

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

32 _______________________________________________________________________________________

Table 15a. Bipolar Voltage Output

Table 15b. Unipolar Voltage Output

DAC CODE (DECIMAL VALUE) OUTPUT VOLTAGE (V) RANGE

65535 10.47984 Overrange

64769 10.23485 Overrange

64768 10.23453 Nominal range

64767 10.23421 Nominal range

48769 5.117585 Nominal range

48768 5.117266 Nominal range

48767 5.116946 Nominal range

35969 1.023773 Nominal range

35968 1.023453 Nominal range

35967 1.023133 Nominal range

32769 0.00032 Nominal range

32768 0 Nominal range

32767 -0.00032 Nominal range

29569 -1.02313 Nominal range

29568 -1.02345 Nominal range

29567 -1.02377 Nominal range

16769 -5.11695 Nominal range

16768 -5.11727 Nominal range

16767 -5.11759 Nominal range

769 -10.2342 Nominal range

768 -10.2345 Nominal range

767 -10.2349 Underrange

0 -10.4802 Underrange

DAC CODE (DECIMAL VALUE) OUTPUT VOLTAGE (V) RANGE

65535 10.48 Overrange

64001 10.23469 Overrange

64000 10.23453 Nominal range

32001 5.117425 Nominal range

32000 5.117266 Nominal range

31999 5.117106 Nominal range

6401 1.023613 Nominal range

6400 1.023453 Nominal range

6399 1.023293 Nominal range

1 0.00016 Nominal range

0 0 Nominal range

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 33

Table 15c. 0 to 20mA Current Output

Table 15d. 4–20mA Current Output

DAC CODE (DECIMAL)

65535 20.449688 Overrange 20.449688

64001 19.970313 Overrange 19.970313

64000 19.970000 Nominal range 19.970000

63999 19.969688 Nominal range 19.969688

32001 9.970313 Nominal range 9.970313

32000 9.970000 Nominal range 9.970000

31999 9.969688 Nominal range 9.969688

12801 3.970313 Nominal range 3.970313

12800 3.970000 Nominal range 3.970000

12799 3.969688 Nominal range 3.969688

97 0.000313 Nominal range 0.000313

96 0.000000 Nominal range 0.000000

95 0.000000 Underrange -0.000313

80 0.000000 Underrange -0.005000

60 0.000000 Underrange -0.011250

40 0.000000 Underrange -0.017500

30 0.000000 Underrange -0.020625

0 0.000000 Underrange -0.030000

ACTUAL OUTPUT CURRENT

(mA)

RANGE

EXTENSION OF OUTPUT

CURRENT LINEAR RANGE

(mA)

DAC CODE (DECIMAL) OUTPUT CURRENT (mA) RANGE

65535 20.449688 Overrange

64000 20.063690 Overrange

63634 19.971655 Nominal range

60000 19.057835 Nominal range

50000 16.543196 Nominal range

40000 14.028556 Nominal range

30000 11.513917 Nominal range

20000 8.999278 Nominal range

16000 7.993423 Nominal range

5000 5.227320 Nominal range

500 4.095732 Nominal range

238 4.029848 Nominal range

200 4.020293 Underrange

100 3.970000 Underrange

80 3.970000 Underrange

60 3.970000 Underrange

30 3.970000 Underrange

0 3.970000 Underrange

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

34 _______________________________________________________________________________________

Table 16. Application Modes and Supply-Voltage Limits

On-the-fly switching. Only one output is active at a time.

Measuring Zero-Code Current

(0 to 20mA Mode)

After setting the MAX5661 for 0 to 20mA current-range mode, determine the LSB size as follows:

1) Measure I

OUT

at full scale (FS).

2) Measure I

OUT

at code 192.

3) Measure I

OUT

at code 193:

If I

OUT

(code 193) - I

OUT

(code 192) > 0.5 I

LSB

, I

OUT

(code 192) is inside the linear region of the I

OUT

trans-

fer curve.

Obtain the straight-line equation from I

OUT

(FS) and

OUT

(192) and substituting code 0 for I

OUT

(zero scale)

in the equation:

The expected current is -30µA (typ).

Applications Information

Power-Supply Sequencing and Bypassing

After connecting all ground inputs, apply the analog supply voltages V

SSV

first followed by the most positive supply, the second most positive supply, etc. Before applying power, connect the V

DDCORE

supply to either

DDV

or V

DDI

, as shown in Table 16, depending on whether the current output or voltage output is used. Do not apply V

DDCORE

separate from the main supply

DDV/VSSV

or V

DDI

) in the preferred configuration (Table 16). Ensure that there are no unconnected power-supply connections when powering the MAX5661. If V

SSV

cannot be powered first, connect a

Schottky diode between V

SSV

and AGND.

Daisy Chaining Multiple MAX5661 Devices

In standard SPI-/QSPI-/MICROWIRE-compatible systems, a microcontroller (µC) communicates with its slave devices through a 3- or 4-wire serial interface. The typical interface includes a chip select signal (CS), a serial clock (SCLK), a data input signal (DIN), and sometimes a data signal output (DOUT). In this system, the µC allots an independent chip-select signal to each slave device so that they can be addressed individually (see Figure 10). Only the slaves with their CS inputs asserted low acknowledge and respond to the activity on the serial clock and data lines. This is simple to implement when there are very few slave devices in the system. An alternative programming method is daisy chaining. Daisy chaining, in serial-interface applications, is a method of propagating commands through multiple devices connected in series (see Figure 11). Daisy chaining reduces CS and DIN line routing, and saves board space when using the MAX5661.

Daisy chain multiple MAX5661 devices by connecting the DOUT of one device to the DIN of the next. Connect the SCLK of all devices to a common clock and connect the CS from all devices to a common chip-select line. Data shifts out of DOUT 24.5 clock cycles after it is shifted into DIN on the falling edge of SCLK. Hold CS low until each slave in the chain receives its 24-bit word (8 command bits and 16 data bits). In this configuration, the µC only needs three signals (CS, SCLK, and DIN) to control all the slaves in the network. The SPI-/QSPI/MICROWIRE-compatible serial interface normally works at up to 10MHz, but must be slowed to 6MHz if daisy chaining. DOUT is high impedance when CS is high.

Figure 10 details a method of controlling multiple MAX5661 devices using separate CS lines. This method allows writes to and reads from each device without shifting data through the other device’s shift register. Figure 10 shows the FAULT outputs shorted together. This configuration requires a read from each device to determine which one has the fault condition and saves an optocoupler in isolated applications. It is not necessary to short the FAULT outputs together.

()II at

IatFSI

OUT

OUT OUT

− =

−

192

aat

x code

OUT

()

192

65535 192

192

−

⎛

⎝

⎜

⎞

⎠

⎟

−

().at ZS I at I at FS x

OUT OUT

= −192 0 00229383 192+Iat

OUT

LSB

IatFSI at

OUT OUT

( )

−

−−

192

2 1 192

APPLICATION MODE V

Voltage from OUTV +13.48V to +15.75V -13.48V to -15.75V V

Current from OUTI (Single Supply)

Voltage from OUTV and Current from OUTI*

+13.48V to +15.75V -13.48V to -15.75V V

DDV

AGND AGND +13.48V to +40V V

SSV

DDI

DDV

to +40V V

DDV

DDCORE

DDV

DDI

DDV

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 35

Figure 11 shows a method of daisy chaining multiple MAX5661 devices using a single CS and SCLK line with the FAULT outputs shorted together. Connect DOUT from IC1 to DIN of IC2, and DOUT from IC2 to DIN of

IC3. Hold CS low for three 24-bit write cycles to load data into all three devices. Due to the latency of reading and writing to the different devices, using separate lines for each FAULT output does not save time.

Figure 10. Address Two MAX5661 Devices Through Separate CS Lines

Driving Inductive Loads from I

OUT

When driving inductive loads > 275µH with the current output (I

OUT

), connect a 1nF capacitor between V

DDI

and I

OUT

for optimal performance.

MAX5661

CSCS1

DINDIN

SCLKSCLK

LDACLDAC

CLRCLR

CSCS2

DIN

IC1

FAULT

DOUT

MAX5661

IC2

SCLK

LDAC

CLR

DOUT

FAULT

DOUT

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

36 _______________________________________________________________________________________

Figure 11. Address Three MAX5661 Devices Through Separate CS Lines

CS CS

DIN DIN

SCLK SCLK

LDAC LDAC

CLR CLR

DIN

SCLK

LDAC

CLR

MAX5661

IC1

FAULT

DOUT

MAX5661

IC2

FAULT

DOUT

MAX5661

DIN

SCLK

LDAC

CLR

DOUT

FAULT

IC3

FAULT

DOUT

MAX5661

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

______________________________________________________________________________________ 37

Chip Information

PROCESS: BiCMOS

Table 17. +4.096V Reference Selector Guide

Pin Configuration

µMAX is a registered trademark of Maxim Integrated Products, Inc.

INITIAL

ACCURACY

(%)

FEATURES

output noise

P-P

output noise

P-P

High-precision reference with temperature sensor

PART

SUPPLY VOLTAGE

RANGE (V)

TEMPERATURE

DRIFT (ppm/°C max)

MAX6341 +8 to +36 1 0.02 Ultra-low drift, 2.4µV

MAX6241 +8 to +36 3 0.02 Low drift, 2.4µV

MAX6174 +4.3 to +40 3 0.06

MAX6133_41 +4.3 to +12.6 3 0.04 Ultra-low drift, µMAX®

MAX6126_41 +4.3 to +12.6 3 0.02 Ultra-low noise, µMAX

MAX6043_41 +6 to +40 3 0.05 High voltage, low drift

MAX6143_41 +6 to +40 8 0.1 High precision

MAX6033_41 +4.3 to +12.6 10 0.04 10mA output current, ultra-low drift, SOT23

MAX6041 +4.3 to +12.6 20 0.2 Low power, low drift, low dropout

MAX6064 +4.3 to +12.6 20 0.2 5mA current output, precision SOT23

MAX6220 +8 to +40 20 0.1 -40°C to +125°C, 15mA output

MAX6037_41 +4.3 to +5.5 25 0.2 SOT23 with shutdown

MAX6034_41 +4.3 to +5.5 30 0.2 Low supply current in SC70

MAX6029 +4.3 to +12.6 30 0.15 Ultra-low supply current, SOT23

TOP VIEW

N.C.

SVN

I.C.

N.C.

CNF0

5859606162 5455565763

2322212019 2726252418 2928 32313017

DIN

N.C.

MAX5661

SCLK

OUTI

N.C.

COMPI

N.C.

OUTI4/0

N.C.

REF

DACGND

DACGNDS

CNF1

N.C.

DDI

N.C.

LQFP

DDV

SSV

OUTV

I.C.

SVP

N.C.

5253

5051

48 N.C.N.C.

N.C.

AGND

N.C.

COMPV

N.C.

DUTGND

DUTGNDS

DDCORE

N.C.

CLR

N.C.

DOUT

N.C.

DGND

LDAC

FAULT

N.C.

MAX5661

Single 16-Bit DAC with Current and Voltage Outputs for Industrial Analog Output Modules

38 _______________________________________________________________________________________

Typical Operating Circuit

OR V

+4.75V TO +5.25V

DDV

+13.48V TO +15.75V -13.48V TO -15.75V

DDI

+13.48V TO +40V

1kΩ

DOUT

DIN

SCLK

CLR

LDAC

OUTI4/0

CNF0

CNF1

FAULT

REF

MICROCONTROLLER

+5V

+4.096V

REFERENCE

SERIAL

INTERFACE*

FULL-SCALE

OUTPUT

ADJUST

REFERENCE

BUFFER

DDCORE

DDV

UNIPOLAR CURRENT BLOCK

(SOURCE ONLY)

16-BIT

DAC

VOLTAGETO-CURRENT CONVERTER

UNIPOLAR OR BIPOLAR

VOLTAGE BLOCK

SSV

DDI

DETAIL OF

SURGE PROTECTION

DDV

SSV

OUTI

OPTIONAL

SURGE

PROTECTION

OPTIONAL

DDI

AGND

22nF

COMPI

OUTI

SVN

DACGNDS

MAX5661

DAC

2.5R

DACGND

DUTGND DUTGNDS

DDV

SSV

DGND AGND

COMPV

3.3nF**

OUTV

PROTECTION

SVP

* SEE THE DAC FUNCTIONAL DIAGRAM IN FIGURE 7. ** REQUIRED TO DRIVE C

PROTECTION

OPTIONAL

SURGE

OPTIONAL

SURGE

OUTV

< 1nF.

MAX5661

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________

Single 16-Bit DAC with Current and Voltage

Outputs for Industrial Analog Output Modules

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

64 LQFP C64-8

21-0083

Package Information

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.

Rainbow Electronics MAX5661 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual