19-2171; Rev 2; 9/02
16-Bit DACs with 32-Channel
Sample-and-Hold Outputs
MAX5631/MAX5632/MAX5633
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
200碌V/step resolution, with output linearity error, typi-
cally 0.005% of full-scale range (FSR). The 100kHz
refresh-rate updates each SHA every 320碌s, 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鈩?QSPI鈩?MICROWIRE鈩?compatible 3-wire serial
interface. Immediate Update Mode allows any chan-
nel鈥檚 output to be updated within 20碌s. Burst Mode
allows multiple values to be loaded into memory in a
single, high-speed data burst. All channels are updated
within 330碌s after data has been loaded.
Each device features an output clamp and output resis-
tors for filtering. The MAX5631 features a 50鈩?output
impedance and is capable of driving up to 250pF of out-
put capacitance. The MAX5632 features a 500鈩?output
impedance and is capable of driving up to 10nF of output
capacitance. The MAX5633 features a 1k鈩?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.
Features
o
Integrated 16-Bit DAC and 32-Channel SHA with
SRAM and Sequencer
o
32 Voltage Outputs
o
0.005% Output Linearity
o
200碌V Output Resolution
o
Flexible Output Voltage Range
o
Remote Ground Sensing
o
Fast Sequential Loading: 1.3碌s 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鈩?, MAX5632 (500鈩?, and
MAX5633 (1k鈩?
Ordering Information
PART
MAX5631AECB
MAX5631AETK
MAX5632AECB
MAX5632AETK
MAX5633AECB
MAX5633AETK
TEMP RANGE
-40 C to +85 C
-40
o
C to +85
o
C
-40 C to +85 C
-40 C to +85 C
-40
o
C to +85
o
C
-40
o
C to +85
o
C
o
o
o
o
o
o
PIN-PACKAGE
64 TQFP
68 Thin QFN
64 TQFP
68 Thin QFN
64 TQFP
68 Thin QFN
Pin Configurations
64
OUT31
63
OUT30
62
OUT29
61
OUT28
60
OUT27
59
OUT26
57
OUT25
56
OUT24
54
OUT22
68
N.C.
67
CH
TOP VIEW
55
OUT23
58
AGND
53
OUT21
66
V
REF
65
AGND
________________________Applications
MEMS Mirror Servo Control
Industrial Process Control
Automatic Test Equipment
Instrumentation
N.C.
1
N.C.
2
GS
3
V
LDAC
4
RST
5
CS
6
DIN
7
SCLK
8
V
LOGIC
IMMED
ECLK
CLKSEL
9
10
11
12
52
CL
51
N.C.
50
V
DD
49
CH
48
V
SS
47
OUT20
46
OUT19
45
OUT18
44
OUT17
43
OUT16
42
AGND
41
V
DD
40
OUT15
39
OUT14
38
OUT13
37
OUT12
36
OUT11
35
CL
MAX5631
MAX5632
MAX5633
DGND
13
V
LSHA
14
Pin Configurations continued at end of data sheet.
AGND
15
V
SS
16
N.C.
17
CL
19
OUT0
20
OUT1
21
OUT2
22
OUT3
23
OUT4
24
OUT5
25
AGND
26
OUT6
27
OUT10
31
CH
32
V
SS
33
OUT7
28
OUT8
29
OUT9
30
N.C.
34
V
DD
18
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鈥檚 website at www.maxim-ic.com.
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