Rainbow Electronics MAX5231 User Manual

General Description

The MAX5230/MAX5231 low-power, dual 12-bit voltageoutput digital-to-analog converters (DACs) feature an internal 3ppm/°C precision bandgap voltage reference and precision output amplifiers. The MAX5231 operates on a single 5V supply with an internal 2.5V reference and features a 4.095V full-scale output range. The MAX5230 operates on a single 3V supply with an internal 1.25V reference and features a 2.0475V full-scale output range. The MAX5231 consumes only 470µA while the MAX5230 consumes only 420µA of supply current. Both devices feature low-power (2µA) software- and hardwareenabled shutdown modes.

The MAX5230/MAX5231 feature a 13.5MHz SPI™-, QSPI™-, and MICROWIRE™-compatible 3-wire serial interface. An additional data output (DOUT) allows for daisy-chaining and read back. Each DAC has a doublebuffered digital input. The MAX5230/MAX5231 feature two software-selectable shutdown output impedances: 1kΩ or 200kΩ. A power-up reset feature sets DAC outputs at ground or at the midscale DAC code.

The MAX5230/MAX5231 are specified over the extended temperature range (-40°C to +85°C) and are available in 16-pin QSOP packages.

Applications

Industrial Process Controls

Automatic Test Equipment

Digital Offset and Gain Adjustment

Motion Control

µP-Controlled Systems

Features

♦ Internal 3ppm/°C Precision Bandgap Reference

2.465V (MAX5231)

1.234V (MAX5230)

♦ 10ppm/°C (max) Full-Scale Output Range

4.095V (MAX5231)

2.0475V (MAX5230)

♦ Single-Supply Operation

5V (MAX5231) 3V (MAX5230)

♦ Low Supply Current

470µA (MAX5231) 420µA (MAX5230)

♦ 13.5MHz SPI/QSPI/MICROWIRE-Compatible,

3-Wire Serial Interface

♦ Pin-Programmable Power-Up Reset State to Zero

or Midscale Output Voltage

♦ Programmable Shutdown Modes with 1kΩ or

200kΩ Internal Output Loads

♦ Recalls Output State Prior to Shutdown or Reset

♦ Buffered Output Drives 5kΩ || 100pF Loads

♦ Space-Saving 16-Pin QSOP Package

MAX5230/MAX5231

3V/5V, 12-Bit, Serial Voltage-Output Dual DACs

with Internal Reference

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2332; Rev 0; 1/02

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

Functional Diagram appears at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor, Corp.

Pin Configuration

TOP VIEW

OSA OSB

OUTA

RSTV

MAX5230

LDAC

CLR

DIN

SCLK

MAX5231

OUTB

AGND

REF

PDL

DOUT

DGND

PART TEMP RANGE

MAX5230AEEE -40°C to +85°C 16 QSOP ±0.5 MAX5230BEEE -40°C to +85°C 16 QSOP ±1 MAX5231AEEE -40°C to +85°C 16 QSOP ±0.5 MAX5231BEEE -40°C to +85°C 16 QSOP ±1

PIN-

PACKAGE

INL

(LSB)

QSOP

MAX5230/MAX5231

3V/5V, 12-Bit, Serial Voltage-Output Dual DACs with Internal Reference

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—MAX5231

(VDD= +4.5V to +5.5V, OS_ = AGND = DGND = 0, RL = 5kΩ, CL = 100pF, TA= 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.

VDDto AGND, DGND...............................................-0.3V to +6V

AGND to DGND.....................................................-0.3V to +0.3V

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

Digital Output (DOUT) to DGND...................-0.3V to V

+ 0.3V

OUT_ to AGND .............................................-0.3V to V

+ 0.3V

OS_ to AGND...................................................-4V to V

+ 0.3V

Maximum Current into Any Pin............................................50mA

Continuous Power Dissipation (T

= +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

Operating Temperature Range ...........................-40°C to +85°C

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

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

STATIC PERFORMANCE

Resolution N 12 Bits

Integral Nonlinearity (Note 1) INL

Differential Nonlinearity DNL ±1 LSB

Offset Error (Note 2) V

Offset-Temperature Coefficient (Note 3) TCV

Full-Scale Voltage V

Full-Scale Temperature Coefficient (Note 3)

Power-Supply Rejection PSR 4.5V ≤ V

DC Crosstalk (Note 4) 100 µV

REFERENCE

Output Voltage V

Output-Voltage Temperature Coefficient (Note 3)

Reference External Load Regulation V

Reference Short-Circuit Current 4mA

DIGITAL INPUTS

Input High Voltage V

Input Low Voltage V

Input Hysteresis V

Input Leakage Current I

Input Capacitance C

DIGITAL OUTPUTS

Output High Voltage V

Output Low Voltage V

DYNAMIC PERFORMANCE

Voltage-Output Slew Rate SR 0.6 V/µs

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX5231A ±0.5

MAX5231B ±1

Code = FFF hex, T

TCV

REF

TCV

OUT/IOUT

HYS

MAX5231A 3 10

MAX5231B (Note 6) 10 30

MAX5231A 3

REF

MAX5231B 10

0 ≤ I

OUT

Digital inputs = 0 or V

SOURCE

= 2mA 0.2 V

SINK

LSB

±3mV

8 µV/°C

= +25°C 4.070 4.095 4.120 V

ppm/°C

≤ 5.5V 30 200 µV

2.465 V

ppm/°C

≤ 100µA (sourcing) 0.1 2 µV/µA

0.7 x V

0.3 x V

200 mV

±1µA

8pF

= 2mA 4.25 V

MAX5230/MAX5231

3V/5V, 12-Bit, Serial Voltage-Output Dual DACs

with Internal Reference

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—MAX5231 (continued)

(VDD= +4.5V to +5.5V, OS_ = AGND = DGND = 0, RL = 5kΩ, CL = 100pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

= +25°C.)

ELECTRICAL CHARACTERISTICS—MAX5230

(VDD= +2.7V to +3.6V, OS_ = AGND = DGND = 0, RL = 5kΩ, CL = 100pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

= +25°C.)

Voltage-Output Settling Time

Output-Voltage Swing (Note 5) 0 to V

OS_ Input Resistance R

Time Required for Output to Settle After Turning on V

Time Required for Output to Settle After Exiting Full Power-Down (Note 6)

Time Required for Output to Settle After Exiting DAC Power-Down (Note 6)

Digital Feedthrough

Major-Carry Glitch Energy 90 nV-s

POWER SUPPLIES

Power-Supply Voltage V

Power-Supply Current (Note 7) I

Power-Supply Current in Power-Down and Shutdown Modes (Note 7)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

(Note 6)

To ±0.5LSB, V (V

- 0.25V) ≥ V

CS = V V

SCLK

Full power-down mode 1.4 5

One DAC shutdown mode 350 390

Both DACs shutdown mode 235 260

= 5V

, f

STEP

SCLK

P-P

= ±4V

≥ 0.25V

OUT

= 100kHz,

10 µs

83 121 kΩ

95 400 µs

12 160 µs

5 nV-s

4.5 5.5 V

470 525 µA

µA

Resolution N 12 Bits

Integral Nonlinearity (Note 1) INL

Differential Nonlinearity DNL ±1 LSB

Offset Error (Note 2) V

Offset-Temperature Coefficient (Note 3) TCV

Full-Scale Voltage V

Full-Scale Temperature Coefficient (Note 3)

Power-Supply Rejection PSR 2.7V ≤ V

DC Crosstalk (Note 4) 100 µV

REFERENCE

Output Voltage V

Output-Voltage Temperature Coefficient (Note 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX5230A ±0.5

MAX5230B ±1

Code = FFF hex, TA = +25°C 2.0350 2.0475 2.0600 V

TCV

REF

TCV

MAX5230A 3 10

MAX5230B (Note 6) 10 30

≤ 3.6V 40 280 µV

MAX5230A 3

REF

MAX5230B 10

±3mV

8 µV/°C

1.234 V

ppm/°C

LSB

MAX5230/MAX5231

3V/5V, 12-Bit, Serial Voltage-Output Dual DACs with Internal Reference

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX5230 (continued)

(VDD= +2.7V to +3.6V, OS_ = AGND = DGND = 0, RL = 5kΩ, CL = 100pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

= +25°C.)

Reference External Load Regulation V

Reference Short-Circuit Current 4 mA

DIGITAL INPUTS

Input High Voltage V

Input Low Voltage V

Input Hysteresis V

Input Leakage Current I

Input Capacitance C

DIGITAL OUTPUTS

Output High Voltage V

Output Low Voltage V

DYNAMIC PERFORMANCE

Voltage-Output Slew Rate SR 0.6 V/µs

Voltage-Output Settling Time

Output-Voltage Swing (Note 5) 0 to V

OS_ Input Resistance R

Time Required for Output to Settle After Turning on V

Time Required for Output to Settle After Exiting Full Power-Down (Note 6)

Time Required for Output to Settle After Exiting DAC Power-Down (Note 6)

Digital Feedthrough

Major-Carry Glitch Energy 90 nV-s

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

(Note 6)

OUT/IOUT

HYS

0 ≤ I

Digital inputs = 0 or V

To ±0.5 LSB, V (V

CS =V V

≤ 100µA (sourcing) 0.1 2 µV/µA

OUT

= 2mA 2.3 V

SOURCE

= 2mA 0.25 V

SINK

= ±2V

, f

SCLK

STEP

P-P

≥ 0.25V

OUT

= 100kHz,

- 0.25V) ≥ V

= 3V

SCLK

0.7 x V

0.3 x V

200 mV

±1µA

8pF

10 µs

83 121 kΩ

95 400 µs

12 160 µs

5 nV-s

MAX5230/MAX5231

3V/5V, 12-Bit, Serial Voltage-Output Dual DACs

with Internal Reference

_______________________________________________________________________________________ 5

Note 1: Accuracy is guaranteed as shown in the following table:

Note 2: Offset is measured at the code closest to 10mV. Note 3: Temperature coefficient is determined by the box method in which the maximum ∆V

OUT

over the temperature range is

divided by ∆T.

Note 4: DC crosstalk is measured as follows: set DAC A to midscale, and DAC B to zero, and measure DAC A output; then change

DAC B to full scale, and measure ∆V

OUT

for DAC A. Repeat the same measurement with DAC A and DAC B interchanged.

DC crosstalk is the maximum ∆V

OUT

measured.

Note 5: Accuracy is better than 1LSB for V

OUT_

= 10mV to VDD- 180mV.

Note 6: Guaranteed by design, not production tested. Note 7: R

LOAD

= ∞ and digital inputs are at either VDDor DGND.

TIMING CHARACTERISTICS—MAX5231

(VDD= +4.5V to +5.5V, AGND = DGND = 0, TA= T

MIN

to T

MAX

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

(Figures 1 and 2)

ELECTRICAL CHARACTERISTICS—MAX5230 (continued)

(VDD= +2.7V to +3.6V, OS_ = AGND = DGND = 0, RL = 5kΩ, CL = 100pF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

= +25°C.)

POWER SUPPLIES

Power-Supply Voltage V

Power-Supply Current (Note 7) I

Power-Supply Current in Power-Down and Shutdown Modes (Note 7)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Full power-down mode 0.9 5

One DAC shutdown mode 320 360

Both DACs shutdown mode 220 245

(V)

3 20 4095

5 10 4095

ACCURACY GUARANTEED

FROM CODE TO CODE

2.7 3.6 V

420 475 µA

µA

SCLK Clock Period t

SCLK Pulse Width High t

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

DIN Setup Time t

DIN Hold Time t

SCLK Rise to DOUT Valid Propagation Delay Time

SCLK Fall to DOUT Valid Propagation Delay Time

SCLK Rise to CS Fall Delay t

CS Rise to SCLK Rise Hold Time t CS Pulse Width High t LDAC Pulse Width Low t CS Rise to LDAC Rise Hold Time t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CSS

CSH

DO1

DO2

CS0

CS1

CSW

LDL

CSLD

= 200pF 80 ns

LOAD

= 200pF 80 ns

LOAD

(Note 8) 40 ns

74 ns

30 ns

0ns

30 ns

0ns

10 ns

30 ns

75 ns

30 ns

MAX5230/MAX5231

3V/5V, 12-Bit, Serial Voltage-Output Dual DACs with Internal Reference

6 _______________________________________________________________________________________

TIMING CHARACTERISTICS—MAX5230

(VDD= +2.7V to +3.6V, AGND = DGND = 0, TA= T

MIN

to T

MAX

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

(Figures 1 and 2)

Note 8: This timing requirement applies only to CS rising edges, which execute commands modifying the DAC input register

contents.

INTEGRAL NONLINEARITY

vs. DIGITAL INPUT CODE (MAX5230)

MAX5230/MAX5231 toc01

DIGITAL INPUT CODE

INL (LSB)

40003500300025002000150010005000

-0.10

-0.05

0.05

0.10

0.15

-0.15

INTEGRAL NONLINEARITY

vs. DIGITAL INPUT CODE (MAX5231)

MAX5230/MAX5231 toc02

DIGITAL INPUT CODE

INL (LSB)

40003500300025002000150010005000

-0.10

-0.05

0.05

0.10

0.15

-0.15

DIFFERENTIAL NONLINEARITY

vs. DIGITAL INPUT CODE (MAX5230)

MAX5230/MAX5231 toc03

DIGITAL INPUT CODE

DNL (LSB)

40003500300025002000150010005000

-0.283

-0.037

0.086

0.208

-0.160

Typical Operating Characteristics

(VDD= +3V (MAX5230), VDD= +5V (MAX5231), RL= 5kΩ, CL= 100pF, OS_ = AGND, both DACs enabled with full-scale output code, T

= +25°C, unless otherwise noted.)

SCLK Clock Period t

SCLK Pulse Width High t

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

DIN Setup Time t

DIN Hold Time t

SCLK Rise to DOUT Valid Propagation Delay Time

SCLK Fall to DOUT Valid Propagation Delay Time

SCLK Rise to CS Fall Delay t

CS Rise to SCLK Rise Hold Time t CS Pulse Width High t LDAC Pulse Width Low t CS Rise to LDAC Rise Hold Time t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CSS

CSH

DO1

DO2

CS0

CS1

CSW

LDL

CSLD

(Note 8) 75 ns

74 ns

30 ns

0ns

30 ns

0ns

= 200pF 200 ns

LOAD

= 200pF 200 ns

LOAD

10 ns

30 ns

75 ns

30 ns

+ 12 hidden pages

Rainbow Electronics MAX5231 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual