19-1478; Rev 1; 9/02
Low-Power, Serial, 14-Bit DACs
with Voltage Output
The MAX5170/MAX5172 low-power, serial, voltage-output, 14-bit digital-to-analog converters (DACs) feature a
precision output amplifier in a space-saving 16-pin
QSOP package. The MAX5170 operates from a +5V
single supply and the MAX5172 operates from a +3V
single supply. Both devices draw only 280µA of supply
current, which reduces to 1µA in shutdown. In addition,
the programmable power-up reset feature allows for a
user-selectable power-up output voltage of either 0 or
midscale.
The 3-wire serial interface is compatible with SPI™,
QSPI™, and MICROWIRE™ standards. An input register followed by a DAC register provides a doublebuffered input, allowing the input and DAC registers to
be updated independently or simultaneously with a 16bit serial word. Additional features include software and
hardware shutdown, shutdown lockout, a hardware
clear pin, and a reference input capable of accepting
DC and offset AC signals. These devices provide a programmable digital output pin for added functionality
and a serial-data output pin for daisy-chaining. All logic
inputs are TTL/CMOS-compatible and are internally
buffered with Schmitt triggers to allow direct interfacing
to optocouplers.
The MAX5170/MAX5172 incorporate a proprietary on-chip
circuit that keeps the output voltage virtually “glitch free,”
limiting the glitches to a few millivolts during power-up.
Both devices are available in 16-pin QSOP packages and
are specified for the extended (-40°C to +85°C) temperature range. For 100% pin-compatible DACS with internal
reference, see the 13-bit MAX5130/MAX5131 and the 12bit MAX5120/MAX5121 data sheets.
Applications
Industrial Process Controls
Digital Offset and Gain Adjustment
Motion Control
Automatic Test Equipment (ATE)
Remote Industrial Controls
µP-Controlled Systems
Features
o ±1 LSB INL
o 1µA Shutdown Current
o “Glitch Free” Output Voltage at Power-Up
o Single-Supply Operation
+5V (MAX5170)
+3V (MAX5172)
o Full-Scale Output Range
+2.048V (MAX5172, VREF = +1.25V)
+4.096V (MAX5170, VREF = +2.5V )
o Rail-to-Rail® Output Amplifier
o Adjustable Output Offset
o Low THD (-80dB) in Multiplying Operation
o SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
o Programmable Shutdown Mode and Power-Up
Reset (0 or Midscale)
o Buffered Output Capable of Driving 5kΩ || 100pF
Loads
o User-Programmable Digital Output Pin Allows
Serial Control of External Components
o Pin-Compatible Upgrade to the 12-Bit
MAX5174/MAX5176
Ordering Information
TEMP RANGE
PIN-PACKAGE
MAX5170AEEE
-40°C to +85°C
16 QSOP
±1
MAX5170BEEE
MAX5172AEEE
MAX5172BEEE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
16 QSOP
16 QSOP
16 QSOP
±2
±2
±4
Pin Configuration
TOP VIEW
OS 1
16 VDD
OUT 2
15 N.C.
RS 3
PDL 4
CLR 5
14 REF
MAX5170
MAX5172
13 AGND
12 SHDN
CS 6
Functional Diagram appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
INL
(LSB)
PART
11 UPO
DIN 7
10 DOUT
9
SCLK 8
DGND
QSOP
________________________________________________________________ Maxim Integrated Products
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.
1
MAX5170/MAX5172
General Description
