MAX5302 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Low-Power, 12-Bit Voltage-Output DAC with Serial Interface

19-1559; Rev 0; 10/99
Low-Power, 12-Bit Voltage-Output DAC
with Serial Interface
__________________General Description
The MAX5302 combines a low-power, voltage-output,
12-bit digital-to-analog converter (DAC) and a precision
output amplifier in an 8-pin µMAX package. It operates
from a single +5V supply, drawing less than 280µA of
supply current.
The output amplifier’s inverting input is available to the
user, allowing specific gain configurations, remote sens-
ing, and high output current capability. This makes the
MAX5302 ideal for a wide range of applications, includ-
ing industrial process control. Other features include a
software shutdown and power-on reset.
The serial interface is SPI™/QSPI™/MICROWIRE™ com-
patible. The DAC has a double-buffered input, organized
as an input register followed by a DAC register. A 16-bit
serial word loads data into the input register. The DAC
register can be updated independently or simultaneously
with the input register. All logic inputs are TTL/CMOS-
logic compatible and buffered with Schmitt triggers to
allow direct interfacing to optocouplers.
Applications
Industrial Process Control
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
Remote Industrial Control
Microprocessor-Controlled Systems
Functional Diagram
Features
o 12-Bit DAC with Configurable Output Amplifier
o +5V Single-Supply Operation
o Low Supply Current: 0.28mA Normal Operation
2µA Shutdown Mode
o Available in 8-Pin µMAX
o Power-On Reset Clears DAC Output to Zero
o SPI/QSPI/MICROWIRE Compatible
o Schmitt-Trigger Digital Inputs for Direct
Optocoupler Interface
PART
MAX5302CUA
MAX5302EUA
Ordering Information
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 µMAX
Pin Configuration
GND
V_DD
REF
FB
OUT
DAC
REGISTER
DAC
CONTROL
INPUT
REGISTER
CS
DIN
SCLK
16-BIT
SHIFT
REGISTER
MAX5302
TOP VIEW
OUT 1
CS 2
DIN 3
SCLK 4
MAX5302
8 V_DD
7 GND
6 REF
5 FB
µMAX
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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