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MAX5402 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX5402
Description  256-Tap, μPoT, Low-Drift, Digital Potentiometer
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX5402 Datasheet(HTML) 1 Page - Maxim Integrated Products

   
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General Description
The MAX5402 µPoTdigital potentiometer is a 256-tap
variable resistor with 10k
Ω 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).
________________________Applications
Mechanical Potentiometer Replacement
Low-Drift PGAs
Adjustable Voltage References
Features
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
5ppm/°C
o Low End-to-End Resistor Temperature Coefficient
35ppm/°C
o Power-On Reset: Wiper Goes to Midscale
(Position 128)
o Glitchless Switching Between the Resistor Taps
o 3-Wire SPI™-Interface Compatible
o 10kΩ Resistor Value
256-Tap, µPoT, Low-Drift,
Digital Potentiometer
VDD
SCLK
DIN
1
2
8
7
H
W
GND
L
µMAX
TOP VIEW
3
4
6
5
MAX5402
CS
Pin Configuration
19-1896; Rev 0; 1/01
Ordering Information
µPoT is a trademark of Maxim Integrated Products.
SPI is a trademark of Motorola, Inc.
PART
TEMP.
RANGE
PIN-
PACKAGE
R (k
Ω)
MAX5402EUA
-40
°C to +85°C
8 µMAX
10
________________________________________________________________ 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.
MAX5402
POR
8
8-BIT
SHIFT
REGISTER
CLOCK
LOGIC
8-BIT
LATCH
SCLK
DIN
CS
8
H
W
L
DECODE
VDD
GND
256
R
R
Functional Diagram


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