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MAX5403EUB+T
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX
General DescriptionThe 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).
ApplicationsMechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier (PGA)
Volume Control
LCD Screen Adjustment
Adjustable Voltage Reference
Programmable Filters, Delays, Time Constant
Impedance Matching
Features10-Pin µMAX Small Footprint Package256-Tap PositionsUltra Low 0.1µA Supply Current+2.7V to +5.5V Single-Supply OperationLow End-To-End Temperature Coefficient:
35ppm/°CLow Ratiometric Temperature Coefficient:
5ppm/°CPower-On Reset: Wiper Goes to Midscale
(Position 128)Glitchless Switching Between Resistor Taps3-Wire SPI™-Interface Compatible10kΩ/50kΩ/100kΩResistor Values
MAX5403/MAX5404/MAX5405
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAXVDD
SCLKWB
GND
MAX5403
MAX5404
MAX5405
μMAX
TOP VIEW
DINCS
Pin Configuration
Ordering Information19-1934; Rev 2; 11/05
PARTPIN-PACKAGER
(kΩ)
PKG
CODE
MAX5403EUB10 µMAX10U10C-4
MAX5404EUB10 µMAX50U10C-4
MAX5405EUB10 µMAX100U10C-4
SPI is a registered trademark of Motorola, Inc.
µMAX is a registered trademark of Maxim Integrated
Products, Inc.
Note:All devices operate over the -40°C to +85°C temperature
range.
MAX5403/MAX5404/MAX5405
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAX
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +5V, unless otherwise noted. VH= VDD, VL= 0, TA= TMINto TMAX. Typical values are at VDD= +5V, TA= +25°C,
unless otherwise noted.)
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
DIN, SCLK, CS.........................................................-0.3V to +6V
HX, LX, WXto GND.......................................-0.3V to (VDD+ 0.3)
Maximum Continuous Current Into HX, LX, and WX...........±1mA
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW
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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC PERFORMANCE (Voltage Divider Mode)ResolutionN8Bits
Integral Nonlinearity (Notes 1, 2)INL±1/2LSBi ffer enti al N onl i near i ty ( N otes 1, 2) DNL±1/2LSB
End-to-End Resistor TempcoTCR35ppm/°C
Ratiometric Resistor Tempco5ppm/°C
Full-Scale ErrorMAX5403-8LSB
Zero-Scale ErrorMAX5403+8LSB
Full-Scale ErrorMAX5404-1.6LSB
Zero-Scale ErrorMAX5404+1.6LSB
Full-Scale ErrorMAX5405-0.8LSB
Zero-Scale ErrorMAX5405+0.8LSB
DC PERFORMANCE (Variable Resistor Mode)ResolutionN8Bits
MAX5403 (Pot A)±2.5
MAX5403 (Pot B)±1
MAX5404±1VDD = +5V
MAX5405±1
MAX5403 (Pot A)±4.5
MAX5403 (Pot B)±3
MAX5404±1.5
Integral Nonlinearity (Notes 1, 3)INL
VDD = +3V
MAX5405±1.5
LSB
VDD = +5VDifferential Nonlinearity
(Notes 1, 3)DNLVDD = +3V±1/2LSB
DC PERFORMANCE (Resistor Characteristics)VDD = +5V275Wiper Resistance (Note 4)RWVDD = +3V550Ω
MAX540350Wiper CapacitanceCWMAX5404/MAX540530pF
MAX5403/MAX5404/MAX5405
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAX
ELECTRICAL CHARACTERISTICS (continued)(VDD= +5V, unless otherwise noted. VH= VDD, VL= 0, TA= TMINto TMAX. Typical values are at VDD= +5V, TA= +25°C,
unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSMAX54037.51012.5
MAX540437.55062.5End-to-End ResistanceRHL
MAX540575100125
DIGITAL INPUTSInput High VoltageVIH0.7 ✕ VDDV
Input Low VoltageVIL0.3 ✕ VDDV
Input Leakage Current±1.0µA
Input Capacitance5pF
TIMING CHARACTERISTICS (ANALOG)MAX5403100
MAX5404325Wiper-Settling TimetS
MAX5405650
TIMING CHARACTERISTICS (DIGITAL) (Note 5)Maximum SCLK Frequency10MHz
SCLK Clock PeriodtCP100ns
SCLK Pulse Width HightCH40ns
SCLK Pulse Width LowtCL40ns
CS Fall to SCLK Rise Setup TimetCSS40ns
SCLK Rise to CS Rise Hold TimetCSH0ns
DIN Setup TimetDS40ns
DIN Hold TimetDH0ns
SCLK Rise to CS Fall DelaytCS010ns
CS Rise to SCLK Rise HoldtCS140ns
CS Pulse Width HightCSW100ns
POWER SUPPLIESSupply VoltageVDD2.75.5V
VDD = +5V0.85µASupply CurrentIDDCS = SCLK = DIN = VDDVDD = +2.7V0.1µA
Note 1:Linearity is defined in terms of the HXto LXcode-dependent resistance.
Note 2:The DNL and INL are measured with the potentiometer configured as a voltage divider with HX= VDDand LX= 0. 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 potentiometer
(Pot A), HAis unconnected and LA= 0. For the 2-terminal potentiometer (Pot B), only LB= 0. At VDD= +5V, the wiper termi-
nal 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 into WX, a current IW= VDD/ RHL.
Note 5:Digital timing is guaranteed by design.
MAX5403/MAX5404/MAX5405
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAX
Typical Operating Characteristics(VDD= +5.0V, TA = +25°C, unless otherwise noted.)
WIPER RESISTANCE vs.
WIPER VOLTAGE (50kΩ)
MAX5403 toc01
WIPER VOLTAGE (V)
WIPER RESISTANCE (VDD = +3V
VDD = +5V
WIPER RESISTANCE vs.
WIPER VOLTAGE (100kΩ)
MAX5403 toc02
WIPER VOLTAGE (V)
WIPER RESISTANCE (VDD = +3V
VDD = +5V
WIPER-TO-END RESISTANCE
vs. INPUT CODE (10kΩ)
MAX5403 toc06
INPUT CODE (DECIMAL)
W-TO-L RESISTANCE (k
WIPER-TO-END RESISTANCE
vs. INPUT CODE (50kΩ)
MAX5403 toc04
INPUT CODE (DECIMAL)
W-TO-L RESISTANCE (k
WIPER-TO-END RESISTANCE
vs. INPUT CODE (100kΩ)
MAX5403 toc05
INPUT CODE (DECIMAL)
W-TO-L RESISTANCE (k
WIPER VOLTAGE (V)
WIPER RESISTANCE
vs. WIPER VOLTAGE (10kΩ)MAX5403 toc03
WIPER RESISTANCE (VDD = +3V
VDD = +5V
VARIABLE RESISTOR DNL
vs. INPUT CODE (10kΩ)
MAX5403 toc07
DNL (LSB)
VARIABLE RESISTOR INL
vs. INPUT CODE (10kΩ)
MAX5403 toc08
INL (LSB)
VARIABLE RESISTOR DNL
vs. INPUT CODE (50kΩ)
MAX5403 toc09
DNL (LSB)
VDD = +5V
MAX5403/MAX5404/MAX5405
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAXVARIABLE RESISTOR INL
vs. INPUT CODE (50kΩ)
MAX5403 toc10
INPUT CODE (DECIMAL)
INL (LSB)0.04
INPUT CODE (DECIMAL)
VARIABLE RESISTOR DNL
vs. INPUT CODE (100kΩ)
DNL (LSB)
MAX5403 toc11MAX5403 toc12
INPUT CODE (DECIMAL)
VARIABLE RESISTOR INL
vs. INPUT CODE (100kΩ)
INL (LSB)
MAX5403 toc13
INPUT CODE (DECIMAL)
VOLTAGE-DIVIDER DNL
vs. INPUT CODE (10kΩ)
DNL (LSB)
MAX5403 toc14
INPUT CODE (DECIMAL)
VOLTAGE-DIVIDER INL
vs. INPUT CODE (10kΩ)
INL (LSB)
MAX5403 toc15
INPUT CODE (DECIMAL)
VOLTAGE-DIVIDER DNL
vs. INPUT CODE (50kΩ)
DNL (LSB)
MAX5403 toc16
INPUT CODE (DECIMAL)
VOLTAGE-DIVIDER INL
vs. INPUT CODE (50kΩ)
INL (LSB)
MAX5403 toc17
INPUT CODE (DECIMAL)
VOLTAGE-DIVIDER DNL
vs. INPUT CODE (100kΩ)
DNL (LSB)
MAX5403 toc18
INPUT CODE (DECIMAL)
VOLTAGE-DIVIDER INL
vs. INPUT CODE (100kΩ)
INL (LSB)
Typical Operating Characteristics (continued)
(VDD= +5.0V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. LOGIC INPUT VOLTAGE
MAX5403 toc19
INPUT LOGIC VOLTAGE (V)
SUPPLY CURRENT (mA)
VDD = +3V
VDD = +5V
SUPPLY CURRENT vs. TEMPERATURE
MAX5403 toc20
TEMPERATURE (°C)
SUPPLY CURRENT (
VDD = +3V
VDD = +5V
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5403 toc21
TEMPERATURE (°C)
END-TO-END RESISTANCE % CHANGE
100kΩ
100kΩ
10kΩ
50kΩ
10kΩ
50kΩ
200ns/div
TAP-TO-TAP SWITCHING TRANSIENT
(CODE 127 TO 128)VW-L
10mV/div
MAX5403 toc22
5V/div
MAX5403/MAX5404/MAX5405
Dual 256-Tap, Low-Drift,
Digital Potentiometers in 10-µMAX
Typical Operating Characteristics (continued)(VDD= +5.0V, TA = +25°C, unless otherwise noted.)
