MAX5467EUT ,32-Tap FleaPoT / 2-Wire Digital PotentiometersELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, V = V , V = 0, T = -40°C to +85°C. Typical values ar ..
MAX5467EUT+T ,32-Tap FleaPoT™, 2-Wire Digital PotentiometersELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, V = V , V = 0, T = -40°C to +85°C. Typical values ar ..
MAX5467EUT+T ,32-Tap FleaPoT™, 2-Wire Digital PotentiometersMAX5460–MAX546819-1956; Rev 3; 11/05™32-Tap FleaPoT , 2-Wire DigitalPotentiometers
MAX5468EUT+T ,32-Tap FleaPoT™, 2-Wire Digital PotentiometersMAX5460–MAX546819-1956; Rev 3; 11/05™32-Tap FleaPoT , 2-Wire DigitalPotentiometers
MAX5471EZT+T ,32-Tap, Nonvolatile, Linear-Taper Digital Potentiometers in SOT23ApplicationsMechanical Potentiometer ReplacementOrdering InformationLiquid-Crystal-Display (LCD) Sc ..
MAX5471EZT-T ,32-Tap, Nonvolatile, Linear-Taper Digital PotentiometersFeaturesThe MAX5471/MAX5472/MAX5474/MAX5475 linear- Wiper Position Stored in Nonvolatile Memory an ..
MAXQ3100-EMN+ , Mixed-Signal Microcontroller with Analog Comparators, LCD, and RTC
MAXQ3120+ ,High-Precision ADC Mixed-Signal MicrocontrollerFeaturesThe MAXQ3120 microcontroller is a high-performance, ♦ High-Performance, Low-Power, 16-Bit R ..
MAXQ3120-FFN ,High-Precision ADC Mixed-Signal MicrocontrollerFeaturesGas and ChemicalUp to 32 General-Purpose I/O PinsIndustrial ControlSensors112-Segment LCD D ..
MAXQ314+ ,Single-Phase Power-Measurement IC with I²C InterfacePin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
MAXQ3210 ,Microcontroller with Internal Voltage Regulator, Piezoelectric Horn Driver, and ComparatorFeatures♦ High-Performance, Low-Power, 16-Bit RISC CoreThe MAXQ3210 microcontroller is a low-power, ..
MAXQ3210 ,Microcontroller with Internal Voltage Regulator, Piezoelectric Horn Driver, and ComparatorELECTRICAL CHARACTERISTICS(V = V to V , C = 10µF + 0.1µF, C = 1µF, T = -40°C to +85°C. Typical valu ..
MAX5461EXT-MAX5467EUT
32-Tap FleaPoT / 2-Wire Digital Potentiometers
General DescriptionThe MAX5460–MAX5468 linear-taper digital potentiome-
ters perform the same function as a mechanical poten-
tiometer or a variable resistor. These devices consist of a
fixed resistor and a wiper contact with 32-tap points that
are digitally controlled through a 2-wire serial interface.
The MAX5462/MAX5465/MAX5468 are configured as
potentiometers. The rest of the devices in this family are
configured as variable resistors. See Pin Configurations
for part functionality.
Three resistance values are available: 10kΩ(MAX5466/
MAX5467/MAX5468), 50kΩ(MAX5463/MAX5464/
MAX5465), and 100kΩ(MAX5460/MAX5461/MAX5462).
The MAX5460–MAX5465 (100kΩand 50kΩ) are avail-
able in space-saving 5-pin and 6-pin SC70 packages.
The MAX5466/MAX5467/MAX5468 (10kΩ) are available
in 5-pin and 6-pin SOT23 packages.
ApplicationsLCD Screen Adjustment
Volume Control
Mechanical Potentiometer Replacement
Gain Adjustment
Line Impedance Matching
FeaturesMiniature SC70 and SOT23 Packages0.3µA Ultra-Low Supply Current+2.7V to +5.5V Single-Supply OperationGlitchless Switching Between Resistor TapsPower-On Reset to Midscale2-Wire Up/Down Serial Interface10kΩ, 50kΩ, and 100kΩResistance Values
MAX5460–MAX5468
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
Pin Configurations
Ordering Information
Functional Diagram appears at end of data sheet.FleaPoT is a trademark of Maxim Integrated Products Inc.
MAX5460–MAX5468
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +2.7V to +5.5V, VH= VDD, VL= 0, TA= -40°C to +85°C. Typical values are at VDD= +2.7V, 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
All Other Pins to GND.................................-0.3V to (VDD+ 0.3)V
Input and Output Latch-Up Immunity.............................±200mA
Maximum Continuous Current into H, L, and W
MAX5460/MAX5461/MAX5462 (100kΩ).......................±0.6mA
MAX5463/MAX5464/MAX5465 (50kΩ).........................±1.3mA
MAX5466/MAX5467/MAX5468 (10kΩ).........................±1.3mA
Continuous Power Dissipation (TA= +70°C)
5-pin SC70 (derate 3.1mW/°C above TA= +70°C)..........247mW
5-pin SOT23 (derate 7.1mW/°C above TA= +70°C)........571mW
6-pin SC70 (derate 3.1mW/°C above TA= +70°C)..........245mW
6-pin SOT23 (derate 8.7mW/°C above TA= +70°C).....695.7mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Soldering Temperature (soldering, 10s)..........................+300°C
MAX5460–MAX5468
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers WIPER RESISTANCE vs. WIPER VOLTAGE
(MAX5460–MAX5465)
MAX5460 toc01
WIPER VOLTAGE (V)
WIPER RESISTANCE (
WIPER RESISTANCE vs. WIPER VOLTAGE
(MAX5466/MAX5467/MAX5468)
MAX5460 toc02
WIPER VOLTAGE (V)
WIPER RESISTANCE (
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5460 toc03
TEMPERATURE (°C)
END-TO-END RESISTANCE % CHNAGE
W-TO-L RESISTANCE
vs. TAP POSITION
MAX5460 toc04
TAP POSITION
RESISTANCE (k
SUPPLY CURRENT vs. TEMPERATURE
MAX5460 toc05
TEMPERATURE (°C)
CURRENT (
U/D
2V/div
OUTPUT
100mV/div
200ns/div
TAP-TO-TAP SWITCHING TRANSIENT
(MAX5460)MAX5460 toc06
Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
Note 1:Up/Down Toggle Rate:
Note 2:Typical settling times are dependent on end-to-end resistance.
Note 3:Supply current taken while changing wiper tap, fTOGGLE= 1MHz.
Note 4:Supply current taken while wiper position is fixed.
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +5.5V, VH= VDD, VL= 0, TA= -40°C to +85°C. Typical values are at VDD= +2.7V, TA= +25°C, unless
otherwise noted.)
MAX5460–MAX5468
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
Pin DescriptionR-INL ERROR vs. INPUT CODE (50kΩ)
MAX5460 toc10
INPUT CODE (DECIMAL)
R-INL LSB
R-DNL ERROR vs. INPUT CODE (10kΩ)MAX5460 toc11
R-DNL LSB
INPUT CODE (DECIMAL)
R-INL ERROR vs. INPUT CODE (10kΩ)
MAX5460 toc12
INPUT CODE (DECIMAL)
R-INL (LSB)
R-DNL ERROR vs. INPUT CODE (100kΩ)
MAX5460 toc07
INPUT CODE (DECIMAL)
R-DNL (LSB)
R-INL ERROR vs. INPUT CODE (100kΩ)
MAX5460 toc08
INPUT CODE (DECIMAL)
R-INL (LSB)
R-DNL ERROR vs. INPUT CODE (50kΩ)
MAX5460 toc09
INPUT CODE (DECIMAL)
R-DNL (LSB)
MAX5460–MAX5468
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
Detailed DescriptionThe MAX5460–MAX5468 consist of a fixed resistor and a
wiper contact with 32-tap points that are digitally con-
trolled through a 2-wire serial interface. Three resistance
values are available: 10kΩ(MAX5466/MAX5467/
MAX5468), 50kΩ(MAX5463/MAX5464/MAX5465), and
100kΩ(MAX5460/MAX5461/MAX5462).
The MAX5462/MAX5465/MAX5468are designed to oper-
ate as potentiometers. In this configuration, the low termi-
nal of the resistor array is connected to ground (pin 2).
The MAX5461/MAX5464/MAX5467perform as variable
resistors. In these devices, the wiper terminal and high
terminal of the resistor array are connected at pin 5.
The MAX5460/MAX5463/MAX5466 are similar variable
resistors, except the low terminal is connected to
ground (pin 2).
Digital Interface OperationThe MAX5460–MAX5468 have two modes of operation
when the serial interface is active: increment and
decrement mode. The serial interface is only active
when CSis low.
The CSand U/Dinputs control the position of the wiper
along the resistor array. When CStransitions from high to
low, the part will go into increment mode if U/Dis high,
and into decrement mode if U/Dis low. Once the mode is
set, the device will remain in that mode until CSgoes high
again. A low-to-high transition at the U/Dpin will incre-
ment or decrement the wiper position depending on the
current mode (Figures 1 and 2).
When the CSinput transitions to high (serial interface
inactive), the value of the counter is stored and the
wiper position is maintained.
Note that when the wiper reaches the maximum (or mini-
mum) tap position, the wiper will not wrap around to the
minimum (or maximum) position.
Figure 2. Serial Interface Timing Diagram, Decrement Mode
MAX5460–MAX5468
32-Tap FleaPoT™, 2-Wire Digital
Potentiometers
Power-On ResetAll parts in this family feature power-on reset (POR) cir-
cuitry that sets the wiper position to midscale at power-
up. By default, the chip is in the increment mode.
Applications InformationThe MAX5460–MAX5468 are intended for circuits
requiring digitally controlled adjustable resistance,
such as LCD contrast control, where voltage biasing
adjusts the display contrast.
Controlling a Switch-Mode
LCD Bias GeneratorFigure 3 shows an application where the variable resis-
tor is used with a MAX1771 to make an adjustable posi-
tive LCD-bias circuit. The output of the MAX1771 is a
positive voltage that is digitally controlled through the
MAX5461/MAX5464/MAX5467. Similarly, Figure 4
shows the application of the variable resistor in a digi-
tally controlled negative LCD-bias circuit along with the
MAX774/MAX775/MAX776.
Alternative Positive
LCD Bias ControlAlternatively, use an op amp to provide buffering and
gain to the output of the MAX5462/MAX5465/MAX5468.
Connect the mechanical potentiometer to the positive
input of a noninverting op amp (Figure 5) to select a
portion of the input signal by digitally controlling the
wiper terminal. Figure 6 shows a similar circuit for the
MAX5461/MAX5464/MAX5467.
Adjustable GainFigure 7 shows how to use the variable resistor to digi-
tally adjust the gain of a noninverting op amp configura-
tion. Connect the MAX5461/MAX5464/MAX5467in
series with a resistor to ground to form the adjustable
gain control of a noninverting amplifier. The MAX5460–
MAX5468have a low 5ppm/°C ratiometric tempco that
allows for a very stable adjustable gain configuration
over temperature.
