19-1896; Rev 0; 1/01
256-Tap, µPoT, Low-Drift,
The MAX5402 µPoT™ digital potentiometer is a 256-tap
variable resistor with 10kΩ total resistance in a tiny 8-
pin µMAX package. This device functions as a mechan-
ical potentiometer, consisting of a fixed resistor string
with a digitally controlled wiper contact. It operates
from +2.7V to +5.5V single-supply voltages and uses
an ultra-low 0.1µA supply current. This device also pro-
vides glitchless switching between resistor taps, as well
as a convenient power-on reset (POR) that sets the
wiper to the midscale position at power-up. A low
5ppm/°C ratiometric temperature coefficient makes it
ideal for applications requiring low drift.
The MAX5402 serves well in applications requiring digi-
tally controlled resistors, including adjustable voltage
references and programmable gain amplifiers (PGAs).
A nominal end-to-end resistor temperature coefficient of
35ppm/°C makes this part suitable for use as a variable
resistor in applications such as low-tempco adjustable
gain and other circuit configurations. This device is
guaranteed over the extended industrial temperature
range (-40°C to +85°C).
o Small Footprint, 8-Pin µMAX Package
o Ultra-Low 100nA Supply Current
o +2.7V to +5.5V Single-Supply Operation
o 256 Tap Positions
o Low Ratiometric Temperature Coefficient
o Low End-to-End Resistor Temperature Coefficient
o Power-On Reset: Wiper Goes to Midscale
o Glitchless Switching Between the Resistor Taps
o 3-Wire SPI™-Interface Compatible
o 10kΩ Resistor Value
Mechanical Potentiometer Replacement
Adjustable Voltage References
MAX5402EUA -40°C to +85°C 8 µMAX
µPoT is a trademark of Maxim Integrated Products.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.