MAX525 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Low-Power, Quad, 12-Bit Voltage-Output DAC with Serial Interface

19-1098; Rev 1; 12/96
Low-Power, Quad, 12-Bit Voltage-Output DAC
with Serial Interface
__________________General Description ______________________________Features
The MAX525 combines four low-power, voltage-output,
12-bit digital-to-analog converters (DACs) and four pre-
cision output amplifiers in a space-saving, 20-pin pack-
age. In addition to the four voltage outputs, each
amplifier’s negative input is also available to the user.
This facilitates specific gain configurations, remote
sensing, and high output drive capacity, making the
MAX525 ideal for industrial-process-control applica-
tions. Other features include software shutdown, hard-
ware shutdown lockout, an active-low reset which clears
all registers and DACs to zero, a user-programmable
logic output, and a serial-data output.
Each DAC has a double-buffered input organized as an
input register followed by a DAC register. A 16-bit serial
word loads data into each input/DAC register. The serial
interface is compatible with SPI™/QSPI™ and
Microwire™. It allows the input and DAC registers to be
updated independently or simultaneously with a single
software command. The DAC registers can be simulta-
neously updated via the 3-wire serial interface. All logic
inputs are TTL/CMOS-logic compatible.
o Four 12-Bit DACs with Configurable
Output Amplifiers
o +5V Single-Supply Operation
o Low Supply Current: 0.85mA Normal Operation
10µA Shutdown Mode
o Available in 20-Pin SSOP
o Power-On Reset Clears all Registers and
DACs to Zero
o Capable of Recalling Last State Prior to Shutdown
o SPI/QSPI and Microwire Compatible
o Simultaneous or Independent Control of DACs
via 3-Wire Serial Interface
o User-Programmable Digital Output
_________________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
INL
(LSB)
________________________Applications
Industrial Process Controls
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
Remote Industrial Controls
Microprocessor-Controlled Systems
MAX525ACPP 0°C to +70°C 20 Plastic DIP
MAX525BCPP 0°C to +70°C 20 Plastic DIP
MAX525ACAP 0°C to +70°C 20 SSOP
MAX525BCAP 0°C to +70°C 20 SSOP
Ordering Information continued on last page.
Pin Configuration appears at end of data sheet.
±1/2
±1
±1/2
±1
_________________________________________________________________________Functional Diagram
DOUT CL
PDL DGND AGND ^VDD
REFAB
DECODE
CONTROL
INPUT
REGISTER A
MAX525
DAC
REGISTER A
DAC A
16-BIT
SHIFT
REGISTER
INPUT
REGISTER B
INPUT
REGISTER C
DAC
REGISTER B
DAC
REGISTER C
DAC B
DAC C
SR
CONTROL
LOGIC
OUTPUT
INPUT
REGISTER D
DAC
REGISTER D
DAC D
FBA
OUTA
FBB
OUTB
FBC
OUTC
FBD
OUTD
CS DIN SCLK UPO
REFCD
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
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