19-1997; Rev 0; 4/01
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
General Description
The MAX5450–MAX5455 are a family of dual digital
potentiometers that perform the same function as a
mechanical potentiometer or variable resistor. The
MAX5451/MAX5453/MAX5455 have two 3-terminal
potentiometers and the MAX5450/MAX5452/MAX5454
have two 2-terminal variable resistors. The MAX5450–
MAX5455 operate from a +2.7V to +5.5V single-supply
voltage and use an ultra-low supply current of 0.1µA.
These devices consist of two fixed resistors each
with 256 digitally-controlled wiper contacts. The conve-
nient power-on reset (POR) sets the wiper to midscale
position at power-up and the easy-to-use up/down
interface allows glitchless switching between
resistor taps. Six inputs control the 14-pin MAX5451/
MAX5453/MAX5455 potentiometers. Four inputs control
the 10-pin MAX5450/MAX5452/MAX5454 variable resis-
tors.
The MAX5450–MAX5455 are ideal for applications
requiring digitally-controlled resistors. Three resistance
values are available: 10kΩ, 50kΩ, and 100kΩ. An end-
to-end resistor temperature coefficient of 35ppm/°C
and a ratiometric temperature coefficient of 5ppm/°C
make the MAX5450–MAX5455 excellent choices for
adjustable gain circuit requiring low-temperature drift
The MAX5450–MAX5455 are available in 10-pin µMAX
and 14-pin TSSOP packages. Each device is guaran-
teed over the extended–industrial temperature range
(-40°C to +85°C).
Features
o
Small-Footprint Packages
10-Pin µMAX (MAX5450/MAX5452/MAX5454)
14-Pin TSSOP (MAX5451/MAX5453/MAX5455)
o
256-Tap Positions
o
Independent Up/Down Potentiometer Controls
(MAX5451/MAX5453/MAX5455)
o
Ultra-Low 0.1µA Supply Current
o
+2.7V to +5.5V Single-Supply Operation
o
Low 35ppm/°C End-to-End Temperature
Coefficient
o
Power-On Reset Sets Wiper to Midscale
(Position 127)
o
Glitchless Switching Between the Resistor Taps
o
10kΩ, 50kΩ, 100kΩ Resistance Values
MAX5450–MAX5455
Ordering Information
PART
MAX5450EUB
MAX5451EUD
MAX5452EUB
MAX5453EUD
MAX5454EUB
MAX5455EUD
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
10
µMAX
14 TSSOP
10
µMAX
14 TSSOP
10
µMAX
14 TSSOP
R (kΩ)
10
10
50
50
100
100
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage References
Adjustable Linear Regulators
Programmable Filters, Delays, Time Constants
Impedance Matching
Pin Configurations
TOP VIEW
CS1
1
U/D
V
DD
W1
L1
2
3
4
5
10
CS2
9
INC
GND
W2
L2
CS1 1
U/D1
U/D2
2
3
14 CS2
13 INC1
12 INC2
MAX5450
MAX5452
MAX5454
8
7
6
V
DD
4
W1 5
H1 6
L1 7
MAX5451
MAX5453
MAX5455
11 GND
10 W2
9
8
H2
L2
µMAX
TSSOP
________________________________________________________________
Maxim Integrated Products
1
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.
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