19-2715; Rev 0; 1/03
16-Bit DACs with 16-Channel
Sample-and-Hold Outputs
General Description
Features
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.
ꢀ Integrated 16-Bit DAC and 16-Channel SHA with
SRAM and Sequencer
ꢀ 16 Voltage Outputs
ꢀ 0.005% Output Linearity
ꢀ 200µV Output Resolution
ꢀ Flexible Output Voltage Range
ꢀ Remote Ground Sensing
The MAX5621/MAX5622/MAX5623 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
ꢀ Three Output Impedance Options
MAX5621 (50Ω), MAX5622 (500Ω), and
MAX5623 (1kΩ)
These devices are controlled through a 20MHz
SPI™/QSPI™/MICROWIRE™-compatible 3-wire serial
interface. Immediate update mode allows any channel’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.
Ordering Information
PART
TEMP RANGE
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
-40oC to +85oC
PIN-PACKAGE
64 TQFP
MAX5621AECB
MAX5621AETK
MAX5622AECB
MAX5622AETK
MAX5623AECB
68 Thin QFN-EP*
64 TQFP
Each device features an output clamp and output resis-
tors for filtering. The MAX5621 features a 50Ω output
impedance and is capable of driving up to 250pF of out-
put capacitance. The MAX5622 features a 500Ω output
impedance and is capable of driving up to 10nF of output
capacitance. The MAX5623 features a 1kΩ output imped-
ance and is capable of driving up to 10nF of output
capacitance.
68 Thin QFN-EP*
64 TQFP
MAX5623AETK
-40oC to +85oC
68 Thin QFN-EP*
*EP = Exposed pad.
Pin Configurations
The MAX5621/MAX5622/MAX5623 are available in 64-pin
TQFP (10mm x 10mm) and 68-pin thin QFN (10mm x
10mm) packages.
TOP VIEW
1
51
N.C.
N.C.
50
V
2
N.C.
DD
3
4
49
GS
CH
V
48
V
47 OUT10
LDAC
RST
CS
SS
________________________Applications
5
6
46
N.C.
OUT9
N.C.
MEMS Mirror Servo Control
Industrial Process Control
Automatic Test Equipment
7
45
DIN
8
44
43
42
41
40
39
38
37
36
35
SCLK
9
OUT8
AGND
V
DD
V
LOGIC
IMMED
MAX5621
MAX5622
MAX5623
10
11
12
13
14
15
16
17
ECLK
CLKSEL
DGND
N.C.
OUT7
N.C.
OUT6
N.C.
CL
Instrumentation
V
LSHA
AGND
V
SS
N.C.
THIN QFN
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.