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MAX5450EUB+MAXIMN/a1500avaiDual, 256-Tap, Up/Down Interface, Digital Potentiometers
MAX5452EUB+TMAXIMN/a186avaiDual, 256-Tap, Up/Down Interface, Digital Potentiometers


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MAX5450EUB+-MAX5452EUB+T
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).
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
Features
Small-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
Coefficient
Power-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

INC
GNDW1
VDDMAX5450
MAX5452
MAX5454
μMAX
TOP VIEWL1
GNDVDDMAX5451
MAX5453
MAX5455W2L1
TSSOP

U/D
CS1CS2
INC1
INC2
U/D1
U/D2
CS2CS1
Pin Configurations

19-1997; Rev 2; 2/06
Ordering Information
PARTPIN-PACKAGER (kΩ)PKG
CODE
MAX5450EUB
10 µMAX10U10C-4
MAX5451EUD
14 TSSOP10U14-1
MAX5452EUB
10 µMAX50U10C-4
MAX5453EUD
14 TSSOP50U14-1
MAX5454EUB
10 µMAX100U10C-4
MAX5455EUD
14 TSSOP100U14-1
Note:
All devices specified over the -40°C to +85°C operating
range.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS

Stresses 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 +6V
CS_, 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,
unless otherwise noted.)
PARAMETERSYM B O L CONDITIONSMINTYPMAXUNITS
DC PERFORMANCE (Voltage-Divider Mode, MAX5451/MAX5453/MAX5455 Only)

ResolutionN8Bits
VDD = +5V±1Integral Nonlinearity
(Notes 1 and 2)INLVDD = +3V±1LSB
VDD = +5V±1Differential Nonlinearity
(Notes 1 and 2)DNLVDD = +3V±1LSB
End-to-End Resistor TempcoTCR35ppm/°C
Ratiometric Resistor Tempco5ppm/°C
MAX5451-8
MAX5453-1.6Full-Scale Error
MAX5455-0.8
LSB
MAX5451+8
MAX5453+1.6Zero-Scale Error
MAX5455+0.8
LSB
DC PERFORMANCE (Variable Resistor Mode)

ResolutionN8Bits
MAX5450, MAX5451±3VDD = +5VMAX5452–MAX5455±1
MAX5450, MAX5451±4.5
Integral Nonlinearity
(Notes 1 and 3)INL
VDD = +3VMAX5452–MAX5455±2
LSB
VDD = +5V±1Differential Nonlinearity
(Notes 1 and 3)DNLVDD = +3V±1LSB
DC PERFORMANCE (Resistor Characteristics)

VDD = +5V, MAX5451/MAX5453/MAX5455225Wiper Resistance (Note 4)RWVDD = +3V, MAX5451/MAX5453/MAX5455550Ω
Wiper CapacitanceCW10pF
MAX5450, MAX54516.51012.5
MAX5452, MAX5453325062.5End-To-End ResistanceRHL
MAX5454, MAX545560100125
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 (VDD -0.5V) and (GND + 0.5V).
(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.)
PARAMETERSYM B O L CONDITIONSMINTYPMAXUNITS
DIGITAL INPUTS (Note 5)

Input High VoltageVIH0.7 x VDDV
Input Low VoltageVIL0.3 x VDDV
Input Leakage Current±1.0µA
Input Capacitance5pF
TIMING CHARACTERISTICS (Analog)

MAX54510.5
MAX54531.2Wiper-Settling Time
(Note 6)tIW
MAX54551.8
TIMING CHARACTERISTICS (Digital, Note 7, Figure 1)

Maximum INC FrequencyfMAX7MHz
CS to INC Setup TimetCI25ns
CS to INC Hold TimetIC0ns
INC Low PeriodtIL25ns
INC High PeriodtIH25ns
U/D to INC SetuptDI50ns
U/D to INC HoldtID0ns
POWER SUPPLIES

Supply VoltageVDD2.75.5V
VDD = +5V0.72Supply CurrentIDDCS = INC = U/D = VDD
or GNDV D D = + 2.7V 0.1µA
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers
Typical Operating Characteristics

(VDD= +5V, TA = +25°C, unless otherwise noted.)
WIPER VOLTAGE (V)
WIPER RESISTANCE
vs. WIPER VOLTAGE (10kΩ)

MAX5450/5 toc01
WIPER RESISTANCE (VDD = +3V
VDD = +5V
WIPER RESISTANCE
vs. WIPER VOLTAGE (50kΩ)
MAX5450/5 toc02
WIPER VOLTAGE (V)
WIPER RESISTANCE (VDD = +3V
VDD = +5V
WIPER RESISTANCE
vs. WIPER VOLTAGE (100kΩ)
MAX5450/5 toc03
WIPER VOLTAGE (V)
WIPER RESISTANCE (VDD = +3V
VDD = +5V
WIPER RESISTANCE
vs. WIPER POSITION (10kΩ)
MAX5450/5 toc04
WIPER POSITION
W-TO-L RESISTANCE (k
WIPER RESISTANCE
vs. WIPER POSITION (50kΩ)
MAX5450/5 toc05
WIPER POSITION
W-TO-L RESISTANCE (k
WIPER RESISTANCE
vs. WIPER POSITION (100kΩ)
MAX5450/5 toc06
WIPER POSITION
W-TO-L RESISTANCE (k
VARIABLE RESISTOR DNL
vs. WIPER POSITION (10kΩ)
MAX5450/5 toc07
WIPER POSITION
DNL (LSB)
VARIABLE RESISTOR INL
vs. WIPER POSITION (MAX5451)
MAX5450/5 toc08
WIPER POSITION
INL (LSB)
VARIABLE RESISTOR DNL
vs. WIPER POSITION (50kΩ)
MAX5450/5 toc09
WIPER POSITION
DNL (LSB)
MAX5450–MAX5455
Dual, 256-Tap, Up/Down Interface,
Digital Potentiometers

VARIABLE 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.)
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
MAX5450/5 toc20
DIGITAL INPUT VOLTAGE (V)
IDD
(mA)3
VDD = 5V
VDD = 3V
SUPPLY CURRENT vs. TEMPERATURE
MAX5450/5 toc21
TEMPERATURE (°C)
SUPPLY CURRENT (
VDD = +3V
VDD = +5V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5450/5 toc19
VDD (V)
IDD
DIGITAL INPUTS + VDD
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5450/5 toc22
TEMPERATURE (°C)
END-TO-END RESISTANCE % CHANGE
100kΩ
100kΩ
10kΩ
50kΩ
10kΩ
50kΩ
1μs/div
TAP-TO-TAP SWITCHING TRANSIENT

10mV/div
MAX5450/5 toc23
INC_
5V/div
MAX5455
MAX5451
MAX5453
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