
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
output
impedance and is capable of driving up to 250pF of out-
put capacitance. The MAX5632 features a 500
output
impedance and is capable of driving up to 10nF of output
capacitance. The MAX5633 features a 1k
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
), MAX5632 (500
), and
MAX5633 (1k
)
Ordering Information
19-2171; Rev 3; 1/05
M
16-Bit DACs with 32-Channel
Sample-and-Hold Outputs
________________________________________________________________
Maxim Integrated Products
1
Pin Configurations
*
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*
0
°
C to +85
°
C
0
°
C to +85
°
C
0
°
C to +85
°
C
0
°
C to +85
°
C
0
°
C to +85
°
C
0
°
C to +85
°
C
PIN-PACKAGE
64 TQFP
68 Thin QFN
64 TQFP
68 Thin QFN
64 TQFP
68 Thin QFN
MAX5631
UCB
MAX5631UTK
MAX5632
UCB
MAX5632UTK
MAX5633
UCB
MAX5633UTK
Pin Configurations continued at end of data sheet.
58
59
60
61
62
54
55
56
57
63
38
37
OUT14
OUT13
OUT12
OUT11
CL
39
40
41
42
43
44
45
46
47
ECLK
CLKSEL
O
V
R
TQFP
TOP VIEW
A
O
O
O
O
O
O
A
O
52
53
49
50
51
O
O
O
O
C
C
O
O
O
O
A
O
O
O
O
O
C
O
V
S
CH
V
SS
OUT20
OUT19
OUT18
OUT17
OUT16
AGND
V
DD
OUT15
33
34
35
36
IMMED
V
LOGIC
SCLK
DIN
CS
V
SS
AGND
V
LSHA
DGND
RST
V
LDAC
GS
N.C.
48
V
DD
N.C.
64
C
V
D
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