MAX5251 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – +3V, Quad, 10-Bit Voltage-Output DAC with Serial Interface

19-1172; Rev 0; 12/96
+3V, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
__________________General Description ______________________________Features
The +3V MAX5251 combines four low-power, voltage-
output, 10-bit digital-to-analog converters (DACs) and
four precision output amplifiers in a space-saving, 20-
pin package. 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
MAX5251 ideal for industrial-process-control applica-
tions. Other features include software shutdown, hard-
ware shutdown lockout, an active-low reset that 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
3-wire serial interface is compatible with SPI™/QSPI™
and Microwire™. It allows the input and DAC registers to
be updated independently or simultaneously with a sin-
gle software command. All logic inputs are TTL/CMOS-
logic compatible.
________________________Applications
o Four 10-Bit DACs with Configurable
Output Amplifiers
o +3.0V to +3.6V Single-Supply Operation
o Low Supply Current: 0.8mA Normal Operation
3µA Shutdown Mode
o Available in 20-Pin SSOP
o Power-On Reset Clears all Registers and
DACs to Zero
o SPI/QSPI and Microwire Compatible
o Simultaneous or Independent Control of DACs
via 3-Wire Serial Interface
o User-Programmable Digital Output
o Schmitt-Trigger Digital Inputs for Direct
Optocoupler Interface
o 12-Bit Upgrade Available: MAX5253
_________________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
INL
(LSB)
Digital Offset and Gain Adjustment
MAX5251ACPP 0°C to +70°C 20 Plastic DIP
±1/2
Microprocessor-Controlled Systems
MAX5251BCPP 0°C to +70°C 20 Plastic DIP
±1
Industrial Process Controls
Automatic Test Equipment
MAX5251ACAP 0°C to +70°C 20 SSOP
MAX5251BCAP 0°C to +70°C 20 SSOP
Ordering Information continued on last page.
±1/2
±1
Remote Industrial Controls
Pin Configuration appears at end of data sheet.
Motion Control
_________________________________________________________________________Functional Diagram
DOUT CL
PDL DGND AGND ^VDD
REFAB
DECODE
CONTROL
INPUT
REGISTER A
MAX5251
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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