19-1934; Rev 2; 11/05
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: 10k
(MAX5403), 50k
(MAX5404), and 100k
(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).
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage Reference
Programmable Filters, Delays, Time Constant
Impedance Matching
SPI is a registered trademark of Motorola, Inc.
µMAX is a registered trademark of Maxim Integrated
Products, Inc.
________________________________________________________________ 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.
Dual 256-Tap, Low-Drift,
♦ 10-Pin µMAX Small Footprint Package
♦ 256-Tap Positions
♦ Ultra Low 0.1µA Supply Current
♦ +2.7V to +5.5V Single-Supply Operation
♦ Low End-To-End Temperature Coefficient:
35ppm/°C
♦ Low Ratiometric Temperature Coefficient:
5ppm/°C
♦ Power-On Reset: Wiper Goes to Midscale
(Position 128)
♦ Glitchless Switching Between Resistor Taps
♦ 3-Wire SPI™ -Interface Compatible
♦ 10k /50k /100k Resistor Values
PART
MAX5403EUB
Applications
MAX5404EUB
MAX5405EUB
Note: All devices operate over the -40°C to +85°C temperature
range.
TOP VIEW
Features
Ordering Information
R
PKG
PIN-PACKAGE
(k )
CODE
10 µMAX
10
U10C-4
10 µMAX
50
U10C-4
10 µMAX
100
U10C-4
Pin Configuration
GND
1
10
L
A
L
2
9
W
B
A
MAX5403
H
3
8
V
B
MAX5404
DD
MAX5405
W
4
7
SCLK
B
CS
5
6
DIN
MAX
1