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MAX5451EUD-MAX5452EUB
Dual / 256-Tap / Up/Down Interface / Digital Potentiometers
General DescriptionThe 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).
ApplicationsMechanical 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
FeaturesSmall-Footprint Packages
10-Pin µMAX (MAX5450/MAX5452/MAX5454)
14-Pin TSSOP (MAX5451/MAX5453/MAX5455)256-Tap PositionsIndependent Up/Down Potentiometer Controls
(MAX5451/MAX5453/MAX5455)Ultra-Low 0.1µA Supply Current+2.7V to +5.5V Single-Supply OperationLow 35ppm/°C End-to-End Temperature
CoefficientPower-On Reset Sets Wiper to Midscale
(Position 127)Glitchless Switching Between the Resistor Taps10kΩ, 50kΩ, 100kΩResistance Values
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
Pin Configurations19-1997; Rev 0; 4/01
Ordering Information
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
ABSOLUTE MAXIMUM RATINGSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDDto GND..............................................................-0.3V to +6VCS_, INC_, and U/D_to GND...................................-0.3V to +6V
H_, L_, W_ to GND......................................-0.3V to (VDD+0.3V)
Maximum Continuous Current into H_, L_, and W_............±1mA
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX (derate 6.94mW/°C above +70°C)..........555mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C)..........727mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS(VDD= +2.7V to +5.5V, VH= VDD, VL= 0; TA= TMINto TMAX, unless otherwise noted. Typical values are at VDD= +5V, TA= +25°C,
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
Note 1:Linearity is defined in terms of the H_ to L_ code-dependent resistance.
Note 2:The DNL and INL are measured with the potentiometer configured as a voltage divider with H_ = VDDand L_ = GND. The
wiper terminal is unloaded and measured with an ideal voltmeter.
Note 3:The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers
(MAX5451/MAX5453/MAX5455), H_ is unconnected and L_ = GND. For the 2-terminal potentiometers
(MAX5450/MAX5452/MAX5454), L_ = GND. At VDD= +5V, the wiper terminal is driven with a source current of 400µA for the
10kΩconfiguration, 80µA for the 50kΩconfiguration, and 40µA for the 100kΩconfiguration. At VDD= +3V,
200µA/40µA/20µA for 10kΩ/50kΩ/100kΩconfiguration, respectively.
Note 4:The wiper resistance is the worst value measured by injecting the currents given in Note 3 into W_ with L_ = GND. RW_ =
(VW_ - VH_) / IW_.
Note 5:Device draws higher supply current when digital inputs are driven with voltages between 0.3 x VDDand 0.7 x VDD. (See
Supply Current vs. Digital Input Voltage in the Typical Operating Characteristics.)
Note 6:Wiper-Settling Time is the worst case 0% to 50% rise-time measured between consecutive wiper positions. H_ = VDD, L_ =
GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see Tap-To-Tap Switching
Transient in the Typical Operating Characteristics).
Note 7:Digital timing is guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +5.5V, VH= VDD, VL= 0; TA= TMINto TMAX, unless otherwise noted. Typical values are at VDD= +5V, TA= +25°C,
unless otherwise noted.)
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
Typical Operating Characteristics(VDD= +5V, TA = +25°C, unless otherwise noted.)
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital PotentiometersVARIABLE RESISTOR INL
vs. WIPER POSITION (MAX5453)
MAX5450/5 toc10
WIPER POSITION
INL (LSB)0.04
MAX5450/5 toc11
WIPER POSITION
VARIABLE RESISTOR DNL
vs. WIPER POSITION (100kΩ)
DNL (LSB)
MAX5450/5 toc12
WIPER POSITION
VARIABLE RESISTOR INL
vs. WIPER POSITION (MAX5455)
INL (LSB)
MAX5450/5 toc13
WIPER POSITION
VOLTAGE-DIVIDER DNL
vs. WIPER POSITION (10kΩ)
DNL (LSB)
MAX5450/5 toc14
WIPER POSITION
VOLTAGE-DIVIDER INL
vs. WIPER POSITION (10kΩ)
INL (LSB)
MAX5450/5 toc15
WIPER POSITION
VOLTAGE-DIVIDER DNL
vs. WIPER POSITION (50kΩ)
DNL (LSB)
MAX5450/5 toc16
WIPER POSITION
VOLTAGE-DIVIDER INL
vs. WIPER POSITION (50kΩ)
INL (LSB)
MAX5450/5 toc17
WIPER POSITION
VOLTAGE-DIVIDER DNL
vs. WIPER POSITION (100kΩ)
DNL (LSB)
MAX5450/5 toc18
WIPER POSITION
VOLTAGE-DIVIDER INL
vs. WIPER POSITION (100kΩ)
INL (LSB)
Typical Operating Characteristics (continued)
(VDD= +5V, TA = +25°C, unless otherwise noted.)
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
Typical Operating Characteristics (continued)(VDD= +5V, TA = +25°C, unless otherwise noted.)
