MAX5403 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-μMAX

19-1934; Rev 1; 4/01
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAX
General Description
The MAX5403/MAX5404/MAX5405 is a family of dual
linear taper digital potentiometers. Each device has one
3-terminal potentiometer and one 2-terminal variable
resistor (Figure 1). The MAX5403/MAX5404/MAX5405
operate from +2.7V to +5.5V single-supply voltages
and use an ultra-low supply current of 0.1µA. These
devices also provide glitchless switching between
resistors taps as well as a convenient power-on reset
(POR) that sets the wiper to the midscale position at
power-up. The potentiometer consists of a fixed resistor
with a wiper contact that is digitally controlled through a
3-wire serial interface and has 256-tap points. It per-
forms the same function as a discrete potentiometer or
variable resistor.
These parts are ideal for applications requiring digitally
controlled resistors. Three resistance values are avail-
able: 10kΩ (MAX5403), 50kΩ (MAX5404), and 100kΩ
(MAX5405). A nominal resistor-temperature coefficient
of 35ppm/°C end-to-end and 5ppm/°C ratiometric make
the MAX5403/MAX5404/MAX5405 ideal for applications
requiring low temperature-coefficient variable resistors,
such as adjustable-gain circuit configurations.
The MAX5403/MAX5404/MAX5405 are available in a 10-
pin µMAX package. Each device is guaranteed over the
extended industrial temperature range (-40°C to +85°C).
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage Reference
Programmable Filters, Delays, Time Constant
Impedance Matching
Features
o 10-Pin µMAX Small Footprint Package
o 256-Tap Positions
o Ultra Low 0.1µA Supply Current
o +2.7V to +5.5V Single-Supply Operation
o Low End-To-End Temperature Coefficient:
35ppm/°C
o Low Ratiometric Temperature Coefficient:
5ppm/°C
o Power-On Reset: Wiper Goes to Midscale
(Position 128)
o Glitchless Switching Between Resistor Taps
o 3-Wire SPI™ -Interface Compatible
o 10kΩ/50kΩ/100kΩ Resistor Values
Ordering Information
PART
MAX5403EUB
MAX5404EUB
MAX5405EUB
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX
10 µMAX
10 µMAX
R (kΩ)
10
50
100
Pin Configuration
SPI is a registered trademark of Motorola, Inc.
TOP VIEW
GND 1
L_B 2
H_B 3
W_B 4
CS 5
MAX5403
MAX5404
MAX5405
µMAX
10 L_A
9 W_A
8 V_DD
7 SCLK
6 DIN
________________________________________________________________ Maxim Integrated Products 1
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