19-2171; Rev 2; 9/02
16-Bit DACs with 32-Channel
Sample-and-Hold Outputs
General Description
Features
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.
ꢀ Integrated 16-Bit DAC and 32-Channel SHA with
SRAM and Sequencer
ꢀ 32 Voltage Outputs
ꢀ 0.005% Output Linearity
ꢀ 200µV Output Resolution
ꢀ Flexible Output Voltage Range
ꢀ Remote Ground Sensing
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.
ꢀ Fast Sequential Loading: 1.3µs per Register
ꢀ Burst and Immediate Mode Addressing
ꢀ No External Components Required for Setting
Gain and Offset
ꢀ Integrated Output Clamp Diodes
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.
ꢀ Three Output Impedance Options:
MAX5631 (50Ω), MAX5632 (500Ω), and
MAX5633 (1kΩ)
Ordering Information
PART
TEMP RANGE
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
PIN-PACKAGE
64 TQFP
MAX5631AECB
MAX5631AETK
MAX5632AECB
MAX5632AETK
MAX5633AECB
Each device features an output clamp and output resis-
tors for filtering. The MAX5631 features a 50Ω output
impedance and is capable of driving up to 250pF of out-
put capacitance. The MAX5632 features a 500Ω output
impedance and is capable of driving up to 10nF of output
capacitance. The MAX5633 features a 1kΩ output imped-
ance and is capable of driving up to 10nF of output
capacitance.
68 Thin QFN
64 TQFP
68 Thin QFN
64 TQFP
MAX5633AETK
-40oC to +85oC
68 Thin QFN
Pin Configurations
The MAX5631/MAX5632/MAX5633 are available in 12mm
x 12mm, 64-pin TQFP, and 10mm x 10mm, 68-pin thin
QFN packages.
TOP VIEW
1
51
N.C.
N.C.
________________________Applications
MEMS Mirror Servo Control
50
V
49
2
N.C.
GS
DD
3
4
CH
V
48
V
47 OUT20
LDAC
RST
CS
SS
5
Industrial Process Control
6
46
OUT19
Automatic Test Equipment
7
45
DIN
OUT18
8
44
43
42
41
40
39
38
37
36
35
SCLK
OUT17
OUT16
AGND
Instrumentation
9
V
LOGIC
IMMED
MAX5631
MAX5632
MAX5633
10
11
12
13
14
15
16
17
ECLK
CLKSEL
DGND
V
DD
OUT15
OUT14
OUT13
OUT12
OUT11
CL
V
LSHA
AGND
Pin Configurations continued at end of data sheet.
V
SS
N.C.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
THIN QFN
________________________________________________________________ Maxim Integrated Products
1
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.