Rainbow Electronics MAX5139 User Manual

General Description

The MAX5138/MAX5139 are a family of single-channel
pin-compatible and software-compatible 16-bit and 12­bit DACs. The MAX5138/MAX5139 are low-power, 16­bit/12-bit, buffered voltage-output, high-linearity DACs.
They use a precision internal reference or a precision
external reference for rail-to-rail operation. The
MAX5138/MAX5139 accept a wide +2.7V to +5.25V sup­ply-voltage range to accommodate most low-power and
low-voltage applications. These devices accept a 3-wire
SPI

TM

-/QSPITM-/MICROWIRETM-/DSP-compatible serial
interface to save board space and reduce the complexi­ty of optically isolated and transformer-isolated applica­tions. The digital interface’s double-buffered hardware
and software LDAC provide simultaneous output update.
The serial interface features a READY output for easy
daisy-chaining of several MAX5138/MAX5139 devices
and/or other compatible devices. The MAX5138/MAX5139
include a hardware input to reset the DAC outputs to
zero or midscale upon power-up or reset, providing
additional safety for applications that drive valves or
other transducers that need to be off during power-up.
The high linearity of the DACs makes these devices ideal
for precision control and instrumentation applications.
The MAX5138/MAX5139 are available in an ultra-small
(3mm x 3mm), 16-pin TQFN package and are specified
over the -40°C to +105°C extended industrial tempera­ture range.

Applications

Automatic Test Equipment

Automatic Tuning

Communication Systems

Data Acquisition

Gain and Offset Adjustment

Portable Instrumentation

Power-Amplifier Control

Process Control and Servo Loops

Programmable Voltage and Current Sources

Features

o 16-/12-Bit Resolution in a 3mm x 3mm, 16-Pin

TQFN Package

o Hardware-Selectable on Power-Up or Reset-to-

Zero/Midscale DAC Output

o Double-Buffered Input Registers
o LDAC Asynchronously Updates DAC Output
o READY Facilitates Daisy Chaining
o High-Performance 10ppm/°C Internal Reference
o Guaranteed Monotonic Over All Operating

Conditions

o Wide +2.7V to +5.25V Supply Range
o Rail-to-Rail Buffered Output Operation
o Low Gain Error (Less Than ±0.5% FS) and Offset

(Less Than ±10mV)

o 30MHz 3-Wire SPI-/QSPI-/MICROWIRE-/

DSP-Compatible Serial Interface

o CMOS-Compatible Inputs with Hysteresis
o Low Power Consumption (I

SHDN

= 2µA max)

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,

Buffered Voltage-Output DACs

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration

19-4428; Rev 1; 4/09

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.

EVALUATION KIT

AVAILABLE

Functional Diagram and Typical Operating Circuit appear
at end of data sheet.

SPI and QSPI are trademarks of Motorola Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Ordering Information

+

Denotes a lead(Pb)-free/RoHS-compliant package.

*

EP = Exposed pad.
Note: All devices are specified over the -40°C to +105°C operating
temperature range.

PART PIN-PACKAGE

RESOLUTION

(BITS)

MAX5138BGTE+ 16 TQFN-EP* 16
MAX5139GTE+ 16 TQFN-EP* 12

TOP VIEW

AVDD

REFI

REFO

AGND

*EXPOSED PAD

OUT

12 10 9

13

14

15

16

+

13

N.C.

3mm x 3mm

11

MAX5138
MAX5139

2

M/Z DVDD

TQFN

READY

*EP

LDAC

N.C.

AGND

8

DIN

7

CS

6

SCLK

5

4

N.C.

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,
Buffered Voltage-Output DACs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

AVDD

= 2.7V to 5.25V, V

DVDD

= 2.7V to 5.25V, V

AVDD

≥ V

DVDD

, V

A

GND

= 0, V

REFI

= V

AVDD

- 0.25V, C

OUT

= 200pF, R

OUT

= 10kΩ,

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

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.

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

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

OUT to AGND...............................................-0.3V to the lower of

(AVDD + 0.3V) and +6V

REFI, REFO, M/Z to AGND...........................-0.3V to the lower of

(AVDD + 0.3V) and +6V

SCLK, DIN, CS to AGND..............................-0.3V to the lower of

(DVDD + 0.3V) and +6V

LDAC, READY to AGND...............................-0.3V to the lower of

(DVDD + 0.3V) and +6V

Continuous Power Dissipation (T

A

= +70°C)

16-Pin TQFN (derate at 14.7mW/°C above +70°C) ..1176.5mW

Maximum Current into Any Input or Output

with the Exception of M/Z Pin .......................................±50mA

Maximum Current into M/Z Pin ...........................................±5mA

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

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

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

STATIC ACCURACY (Notes 1, 2)

Resolution N

MAX5138 Integral Nonlinearity INL

MAX5139 Integral Nonlinearity INL V

Differential Nonlinearity DNL Guaranteed monotonic -1.0 +1.0 LSB

Offset Error OE (Note 4) -10 ±1 +10 mV

Offset-Error Drift ±4 µV/°C

Gain Error GE (Note 4) -0.5 ±0.2 +0.5 % of FS

Gain Temperature Coefficient ±2

REFERENCE INPUT

Reference-Input Voltage Range V

Reference Input Impedance 113 kΩ

INTERNAL REFERENCE

Reference Voltage V

Refer ence Tem p er atur e C oeffi ci ent (Note 5) 10 25 ppm/°C
Reference Output Impedance 1 Ω

Line Regulation 100 ppm/V

Maximum Capacitive Load C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

REFI

REFO

R

MAX5138 16

MAX5139 12

V

= 5V,

REFI

AVDD = 5.25V

= 5V, AVDD = 5.25V -1 ±0.25 +1 LSB

REFI

AVDD = 3V to 5.25V 2 AVDD

AVDD = 2.7V to 3V 2

T

+25°C 2.437 2.440 2.443 V

A =

( N ote 3) -9 ±2 +11

= +25°C ±6

T

A

AVDD -

0.1 nF

0.2

Bits

LSB

ppm

FS/°C

V

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,

Buffered Voltage-Output DACs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

AVDD

= 2.7V to 5.25V, V

DVDD

= 2.7V to 5.25V, V

AVDD

≥ V

DVDD

, V

A

GND

= 0, V

REFI

= V

AVDD

- 0.25V, C

OUT

= 200pF, R

OUT

= 10kΩ,

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

DAC OUTPUT VOLTAGE (Note 2)

Output Voltage Range No load 0.02

DC Output Impedance 0.1 Ω

Maximum Capacitive Load
(Note 5)

Resistive Load R

Short-Circuit Current I

Power-Up Time From power-down mode 25 µs

DIGITAL INPUTS (SCLK, DIN, CS, LDAC) (Note 6)

Input High Voltage V

Input Low Voltage V

Input Leakage Current I

Input Capacitance C

DIGITAL OUTPUTS (READY)

Output High Voltage V

Output Low Voltage V

DYNAMIC PERFORMANCE

Voltage-Output Slew Rate SR Positive and negative 1.25 V/µs

Voltage-Output Settling Time t

Digital Feedthrough Code 0, all digital inputs from 0 to DVDD 0.5 nV•s

Major Code Transition Analog
Glitch Impulse

Output Noise 10kHz 120 nV/√Hz

Integrated Output Noise 1Hz to 10kHz 18 µV

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

C

SC

IN

OH

OL

Series resistance = 0Ω 0.2 nF

L

Series resistance = 500Ω 15 µF

L

AVDD = 5.25V ±35

AVDD = 2.7V -40 ±20 +40

IH

IL

VIN = 0 or DVDD -1 ±0.1 +1 µA

IN

I

SOURCE

I

= 2mA 0.4 V

SINK

1/4 scale to 3/4 scale V

S

settle to ±2 LSB (Note 5)

= 3mA

= AVDD = 5V

REFI

2kΩ

0.7 x

DVDD

DVDD

- 0.5

5µs

25 nV•s

AVDD

- 0.02

0.3 x

DVDD

10 pF

V

mA

V

V

V

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,
Buffered Voltage-Output DACs

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

AVDD

= 2.7V to 5.25V, V

DVDD

= 2.7V to 5.25V, V

AVDD

≥ V

DVDD

, V

A

GND

= 0, V

REFI

= V

AVDD

- 0.25V, C

OUT

= 200pF, R

OUT

= 10kΩ,

T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.)

Note 1: Static accuracy tested without load.
Note 2: Linearity is tested within 20mV of AGND and AVDD

,

allowing for gain and offset error.

Note 3: Codes above 2047 are guaranteed to be within ±9 LSB

.

Note 4: Gain and offset tested within 100mV of AGND and AVDD

.

Note 5: Guaranteed by design.
Note 6: Device draws current in excess of the specified supply current when a digital input is driven with a voltage of VI < DVDD - 0.6V

or VI > 0.5V. At VI = 2.2V with DVDD = 5.25V, this current can be as high as 2mA. The SPI inputs are CMOS-input-level com­patible. The 30MHz clock frequency cannot be guaranteed for a minimum signal swing.

Note 7: Excess current from AVDD is 10mA when powered without DVDD. Excess current from DVDD is 1mA when powered without

AVDD.

Note 8: All timing specifications are with respect to the digital input and output thresholds.
Note 9: Maximum daisy-chain clock frequency is limited to 25MHz.

C7

C6

C5 D2

D1

D0

X

COMMAND EXECUTED ON

24th FALLING EDGE OF SCLK

CS

SCLK

DIN

X = DON'T CARE.

t

CH

t

CL

t

CSS

t

DH

t

CSH

t

DS

t

SRL

READY

X

t

CSW

D3

Figure 1. Serial-Interface Timing Diagram

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER REQUIREMENTS (Note 7)

Analog Supply Voltage Range AVDD 2.7 5.25 V

Digital Supply Voltage Range DVDD 2.7 AVDD V

Supply Current

Power-Down Supply Current

I

AVDD

I

DVDD

I

AVPD

I

DVPD

No load, all digital inputs at 0 or DVDD

No load, all digital inputs at 0 or DVDD

1 1.6 mA

110µA

0.2 2

0.1 2

TIMING CHARACTERISTICS (Note 8) (Figure 1)

Serial-Clock Frequency f

SCLK Pulse-Width High t

SCLK Pulse-Width Low t
CS Fall-to-SCLK Fall Setup Time t
SCLK Fall-to CS-Rise Hold Time t

DIN-to-SCLK Fall Setup Time t

DIN-to-SCLK Fall Hold Time t
SCLK Fall to READY Transition t

CS Pulse-Width High t
LDAC Pulse Width t

LDACPWL

SCLK

CH

CL

CSS

CSH

DS

DH

SRL

CSW

(Note 9) 30 ns

0 30 MHz

13 ns

13 ns

8ns

5ns

10 ns

2ns

33 ns

33 ns

µA

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,

Buffered Voltage-Output DACs

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

MAX5138 INTEGRAL NONLINEARITY

vs. DIGITAL INPUT CODE

9

6

3

0

INL (LSB)

-3

-6

-9
0 65,536

DIGITAL INPUT CODE (LSB)

49,15232,76816,384

DIFFERENTIAL NONLINEARITY

vs. DIGITAL INPUT CODE

1.0

0.8

0.6

0.4

0.2

0

DNL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0
0 65,536

DIGITAL INPUT CODE (LSB)

49,5232,76816,384

MAX5138 toc01

MAX5138 toc04

9

7

5

3

1

-1

INL (LSB)

-3

-5

-7

-9

2.7 3.2

1.0

0.8

0.6

0.4

0.2

0

DNL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0

2.7

INTEGRAL NONLINEARITY

vs. ANALOG SUPPLY VOLTAGE

4.73.7 4.2 5.2

SUPPLY VOLTAGE (V)

DIFFERENTIAL NONLINEARITY

vs. ANALOG SUPPLY VOLTAGE

4.73.2 3.7 4.2 5.2

SUPPLY VOLTAGE (V)

MAX5138 toc02

MAX5138 toc05

9

7

5

3

1

-1

INL (LSB)

-3

-5

-7

-9

-40

1.0

0.8

0.6

0.4

0.2

0

DNL (LSB)

-0.2

-0.4

-0.6

-0.8

-1.0

-40

INTEGRAL NONLINEARITY

vs. TEMPERATURE

MAX5138 toc03

1008040 60020-20

TEMPERATURE (°C)

DIFFERENTIAL NONLINEARITY

vs. TEMPERATURE

MAX5138 toc06

1008040 60020-20

TEMPERATURE (°C)

vs. ANALOG SUPPLY VOLTAGE

10

8

6

4

2

0

-2

OFFSET ERROR (mV)

-4

-6

-8

-10

2.7

OFFSET ERROR

SUPPLY VOLTAGE (V)

4.73.2 3.7 4.2 5.2

MAX5138 toc07

12-BIT DIFFERENTIAL NONLINEARITY

vs. DIGITAL INPUT CODE

0.10

0.08

0.06

0.04

0.02

0

DNL (LSB)

-0.02

-0.04

-0.06

-0.08

-0.10
04096

DIGITAL INPUT CODE (LSB)

307220481024

MAX5138 toc08

INL (LSB)

12-BIT INTEGRAL NONLINEARITY

vs. DIGITAL INPUT CODE

1.00

0.75

0.50

0.25

0

-0.25

-0.50

-0.75

-1.00
0 4096

DIGITAL INPUT CODE (LSB)

307220481024

MAX5138 toc09

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,
Buffered Voltage-Output DACs

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

OFFSET ERROR

vs. TEMPERATURE

0.8

0.6

0.4

0.2

0

-0.2

-0.4

OFFSET ERROR (mV)

-0.6

-0.8

-1.0

-40

V
V

AVDD
REF

V

AVDD

= 5V

V

REF

= 2.7V

= 2.5V

TEMPERATURE (°C)

= 5.25V

MAX5138 toc10

GAIN ERROR (%FS)

1008040 60020-20

ANALOG SUPPLY CURRENT

vs. ANALOG SUPPLY VOLTAGE

1.00

V

= 2.7V

DVDD

0.98

0.96

V

= V

0.94

0.92

0.90

0.88

0.86

ANALOG SUPPLY CURRENT (mA)

0.84

0.82

0.80

2.7 5.2
ANALOG SUPPLY VOLTAGE (V)

OUT

V

OUT

REFO

= 0

4.74.23.73.2

MAX5138 toc13

ANALOG SUPPLY CURRENT (mA)

GAIN ERROR

vs. ANALOG SUPPLY VOLTAGE

0.5

0.4

0.3

0.2

0.1

0

-0.1

-0.2

-0.3

-0.4

-0.5

2.7
SUPPLY VOLTAGE (V)

4.7 5.23.73.2 4.2

ANALOG SUPPLY CURRENT

vs. TEMPERATURE

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

-40 100

I

AVDD

I

DVDD

TEMPERATURE (°C)

GAIN ERROR

vs. TEMPERATURE

0.036

0.032

MAX5138 toc11

0.028

0.024

0.020

GAIN ERROR (%FS)

0.016

0.012

0.008

-40

V

= 5.25V

AVDD

= 5V

V

REF

TEMPERATURE (°C)

V
V

AVDD
REF

= 2.7V

= 2.5V

MAX5138 toc12

100806040200-20

ANALOG SUPPLY CURRENT vs. SUPPLY

VOLTAGE (POWER-DOWN MODE)

0.8

MAX5138 toc14

806020 400-20

0.7

0.6

TA = -40°C

0.5

0.4

0.3

0.2

ANALOG SUPPLY CURRENT (μA)

0.1

0

2.7 5.2

TA = +105°C

TA = +25°C

SUPPLY VOLTAGE (V)

MAX5138 toc15

4.74.23.2 3.7

EXITING/ENTERING

POWER-DOWN MODE

V

OUT

4μs/div

MAX5138 toc16

500mV/div

MAJOR CODE TRANSITION

1μs/div

MAX5138 toc17

20mV/div

SETTLING TIME UP

MAX5138 toc18

500mV/div

400ns/div