19-1171; Rev 1; 10/02
Low-Power, Quad, 10-Bit Voltage-Output DAC
with Serial Interface
______________________________Features
o Four 10-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 and DIP Packages
o Power-On Reset Clears all Registers and
DACs to Zero
o SPI/QSPI and MICROWIRE Compatible
o Simultaneous or Independent Control of DACs
through 3-Wire Serial Interface
o User-Programmable Digital Output
o Schmitt-Trigger Inputs for Direct Optocoupler
Interface
o 12-Bit Upgrade Available: MAX525
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 single software command. All logic inputs are
TTL/CMOS-logic compatible.
_________________Ordering Information
PART
Industrial Process Controls
Automatic Test Equipment
INL
(LSB)
0°C to +70°C
20 Plastic DIP
±1/2
MAX5250BCPP
MAX5250ACAP
MAX5250BCAP
Digital Offset and Gain Adjustment
Microprocessor-Controlled Systems
PIN-PACKAGE
MAX5250ACPP
________________________Applications
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
20 Plastic DIP
20 SSOP
20 SSOP
±1
±1/2
±1
Ordering Information continued on last page.
Remote Industrial Controls
Motion Control
Pin Configuration appears at end of data sheet.
_________________________________________________________________________Functional Diagram
DOUT CL
PDL
DGND
AGND
VDD
REFAB
FBA
DECODE
CONTROL
MAX5250
OUTA
INPUT
REGISTER A
LOGIC
OUTPUT
CS DIN SCLK
UPO
DAC
REGISTER B
DAC B
INPUT
REGISTER C
SR
CONTROL
DAC A
INPUT
REGISTER B
16-BIT
SHIFT
REGISTER
DAC
REGISTER A
DAC
REGISTER C
DAC C
INPUT
REGISTER D
DAC
REGISTER D
DAC D
FBB
OUTB
FBC
OUTC
FBD
OUTD
REFCD
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ 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
MAX5250
__________________General Description
The +5V MAX5250 combines four low-power, voltageoutput, 10-bit digital-to-analog converters (DACs) and
four precision output amplifiers in a space-saving, 20pin 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
MAX5250 ideal for industrial-process-control applications. Other features include software shutdown, hardware shutdown lockout, an active-low reset that clears
all registers and DACs to zero, a user-programmable
logic output, and a serial-data output.
