19-2715; Rev 1; 2/05
16-Bit DACs with 16-Channel
Sample-and-Hold Outputs
General Description
The MAX5621/MAX5622/MAX5623 are 16-bit digital-to-
analog converters (DACs) with 16 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 MAX5621/MAX5622/MAX5623 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 channel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 MAX5621 features a 50鈩?output
impedance and is capable of driving up to 250pF of out-
put capacitance. The MAX5622 features a 500鈩?output
impedance and is capable of driving up to 10nF of output
capacitance. The MAX5623 features a 1k鈩?output imped-
ance and is capable of driving up to 10nF of output
capacitance.
The MAX5621/MAX5622/MAX5623 are available in 64-pin
TQFP (10mm x 10mm) and 68-pin thin QFN (10mm x
10mm) packages.
Features
鈾?/div>
Integrated 16-Bit DAC and 16-Channel SHA with
SRAM and Sequencer
鈾?/div>
16 Voltage Outputs
鈾?/div>
0.005% Output Linearity
鈾?/div>
200碌V Output Resolution
鈾?/div>
Flexible Output Voltage Range
鈾?/div>
Remote Ground Sensing
鈾?/div>
Fast Sequential Loading: 1.3碌s per Register
鈾?/div>
Burst and Immediate Mode Addressing
鈾?/div>
No External Components Required for Setting
Gain and Offset
鈾?/div>
Integrated Output Clamp Diodes
鈾?/div>
Three Output Impedance Options
MAX5621 (50鈩?, MAX5622 (500鈩?, and
MAX5623 (1k鈩?
MAX5621/MAX5622/MAX5623
Ordering Information
PART
MAX5621UCB
MAX5621UTK
MAX5622UCB
MAX5622UTK
MAX5623UCB
MAX5623UTK
TEMP RANGE*
0 C to +85 C
0
o
C to +85
o
C
0 C to +85 C
0 C to +85 C
0
o
C to +85
o
C
0
o
C to +85
o
C
o
o
o
o
o
o
PIN-PACKAGE
64 TQFP
68 Thin QFN-EP**
64 TQFP
68 Thin QFN-EP**
64 TQFP
68 Thin QFN-EP**
*For
other temperature ranges, contact factory.
**EP
= Exposed pad.
Pin Configurations
63
OUT15
61
OUT14
59
OUT13
56
OUT12
68
N.C.
66
V
REF
64
N.C.
62
N.C.
60
N.C.
57
N.C.
55
N.C.
67
CH
53
N.C.
33
TOP VIEW
54
OUT11
65
AGND
58
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
CS
DIN
SCLK
V
LOGIC
IMMED
ECLK
CLKSEL
5
6
7
8
9
10
11
12
52
CL
51
N.C.
50
V
DD
49
CH
48
V
SS
47
OUT10
46
N.C.
45
OUT9
44
N.C.
43
OUT8
42
AGND
41
V
DD
40
N.C.
39
OUT7
38
N.C.
37
OUT6
36
N.C.
35
CL
34
MAX5621
MAX5622
MAX5623
DGND
13
V
LSHA
14
AGND
15
V
SS
16
N.C.
17
CL
19
OUT0
20
N.C.
21
OUT1
22
N.C.
23
OUT2
24
N.C.
25
AGND
26
OUT3
27
N.C.
28
OUT4
29
N.C.
30
31
V
DD
18
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
THIN QFN
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
OUT5
CH
V
SS
N.C.
32
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