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.

General Description

The MAX5631/MAX5632/MAX5633 are 16-bit digital-to-

analog converters (DACs) with 32 sample-and-hold

(SHA) outputs for applications where a high number of

programmable voltages are required. These devices

include a clock oscillator and a sequencer that updates

the DAC with codes from an internal SRAM. No external

components are required to set offset and gain.

The MAX5631/MAX5632/MAX5633 feature a -4.5V to

+9.2V output voltage range. Other features include a

200µV/step resolution, with output linearity error, typi-

cally 0.005% of full-scale range (FSR). The 100kHz

refresh-rate updates each SHA every 320µs, resulting

in negligible output droop. Remote ground sensing

allows the outputs to be referenced to the local ground

of a separate device.

These devices are controlled through a 20MHz

SPI™/QSPI™/MICROWIRE™-compatible 3-wire serial

interface. Immediate Update Mode allows any chan-

nel’s output to be updated within 20µs. Burst Mode

allows multiple values to be loaded into memory in a

single, high-speed data burst. All channels are updated

within 330µs after data has been loaded.

Each device features an output clamp and output resis-

tors for filtering. The MAX5631 features a 50

Ω output

impedance and is capable of driving up to 250pF of out-

put capacitance. The MAX5632 features a 500

Ω output

impedance and is capable of driving up to 10nF of output

capacitance. The MAX5633 features a 1k

Ω output imped-

ance and is capable of driving up to 10nF of output

capacitance.

The MAX5631/MAX5632/MAX5633 are available in 12mm

x 12mm, 64-pin TQFP, and 10mm x 10mm, 68-pin thin

QFN packages.

________________________Applications

MEMS Mirror Servo Control

Industrial Process Control

Automatic Test Equipment

Instrumentation

Features

o Integrated 16-Bit DAC and 32-Channel SHA with

SRAM and Sequencer

o 32 Voltage Outputs

o 0.005% Output Linearity

o 200µV Output Resolution

o Flexible Output Voltage Range

o Remote Ground Sensing

o Fast Sequential Loading: 1.3µs per Register

o Burst and Immediate Mode Addressing

o No External Components Required for Setting

Gain and Offset

o Integrated Output Clamp Diodes

o Three Output Impedance Options:

MAX5631 (50

Ω), MAX5632 (500Ω), and

MAX5633 (1k

Ω)

19-2171; Rev 3; 1/05

16-Bit DACs with 32-Channel

Sample-and-Hold Outputs

________________________________________________________________ Maxim Integrated Products

1

Pin Configurations

Ordering Information

*For other temperature-range options, contact factory.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor, Corp.

PART

TEMP RANGE*

PIN-PACKAGE

MAX5631UCB

0°C to +85°C

64 TQFP

MAX5631UTK

0°C to +85°C

68 Thin QFN

MAX5632UCB

0°C to +85°C

64 TQFP

MAX5632UTK

0°C to +85°C

68 Thin QFN

MAX5633UCB

0°C to +85°C

64 TQFP

MAX5633UTK

0°C to +85°C

68 Thin QFN

Pin Configurations continued at end of data sheet.

58

59

60

61

62

54

55

56

57

63

38

39

40

41

42

43

44

45

46

47

ECLK

TQFP

TOP VIEW

52

53

49

50

51

CH

OUT20

OUT19

OUT18

OUT17

OUT16

AGND

OUT15

33

34

35

36

37

OUT14

OUT13

OUT12

OUT11

CL

IMMED

SCLK

DIN

CS

AGND

DGND

CLKSEL

RST

GS

N.C.

48

N.C.

64

23

22

21

20

19

27

26

25

24

18

29

28

32

31

30

17

11

10

9

8

7

6

5

4

3

2

16

15

14

13

12

1

MAX5631

MAX5632

MAX5633