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MAX5160LEUAMAXIM ?N/a163avaiLow-Power Digital Potentiometers
MAX5160LEUAMAXIMN/a239avaiLow-Power Digital Potentiometers
MAX5160LEUAMAXN/a1209avaiLow-Power Digital Potentiometers
MAX5160MEUAMAXIMN/a55avaiLow-Power Digital Potentiometers
MAX5160MEUAMAXIM ?N/a19avaiLow-Power Digital Potentiometers
MAX5160NEUA+ |MAX5160NEUAMAXIMN/a460avaiLow-Power Digital Potentiometers
MAX5161NEUTMAXIMN/a3000avaiLow-Power Digital Potentiometers


MAX5161NEUT ,Low-Power Digital Potentiometersapplications requiring a low-temper-ature-coefficient variable resistor, such as low-tempco,' Singl ..
MAX5161NEZT ,Low-Power Digital PotentiometersFeaturesThe MAX5160/MAX5161 linear-taper digital potentiome-♦ 32 Tap Positionsters perform the same ..
MAX5161NEZT+T ,Low-Power Digital PotentiometersFeaturesThe MAX5160/MAX5161 linear-taper digital potentiome-♦ 32 Tap Positionsters perform the same ..
MAX5161NEZT-T ,Low-Power Digital Potentiometersapplications requiring a low-temper-ature-coefficient variable resistor, such as low-tempco,♦ +2.7V ..
MAX5165LCCM ,32-Channel Sample/Hold Amplifier with a Single Multiplexed InputApplicationsMAX5165LECM -40°C to +85°C 48 TQFP 50Automatic Test Equipment (ATE)MAX5165MECM -40°C to ..
MAX5167MCCM ,32-Channel Sample/Hold Amplifier with Output Clamping DiodesFeaturesThe MAX5167 contains 32 sample-and-hold amplifiers♦ 32-Channel Sample/Holddriven by a singl ..
MAX9686MJA ,Single/Dual Very Fast TTL Output ComparatorsELECTRICAL CHARACTERISTICS (VS = wc TA = 25 C unless otherwise noted ) ( MAX9686C/9698C MAX9686M/9 ..
MAX9686MJA ,Single/Dual Very Fast TTL Output ComparatorsGeneral Description The MAX9686 (Single) and MAX9698 (Dual) are very fast F ea tures . 6ns P ..
MAX9687CPE ,Dual / Ultra-Fast ECL-Output ComparatorMAX968719-2400; Rev 1; 7/93Dual, Ultra-Fast ECL-Output Comparator_______________
MAX9687CSE ,Dual / Ultra-Fast ECL-Output ComparatorFeaturesThe MAX9687 is a dual, ultra-fast ECL comparator ' 1.4ns Propagation Delaymanufactured with ..
MAX9687ESE ,Dual / Ultra-Fast ECL-Output ComparatorApplications** Contact factory for dice specifications.High-Speed A/D ConvertersHigh-Speed Line Rec ..
MAX968ESA ,Single/Dual/Quad / Micropower / Ultra-Low-Voltage / Rail-to-Rail I/O ComparatorsFeaturesThe MAX965–MAX970 single/dual/quad micropower' Ultra-Low Single-Supply Operation down to +1 ..


MAX5160LEUA-MAX5160MEUA-MAX5160NEUA+-MAX5161NEUT
Low-Power Digital Potentiometers
General Description
The MAX5160/MAX5161 linear-taper digital potentiome-
ters perform the same function as a mechanical poten-
tiometer or a variable resistor. They consist of a fixed
resistor and a wiper contact with 32 tap points that are
digitally controlled by three lines for the 8-pin MAX5160
or by two lines for the 6-pin MAX5161.
These parts are ideal for applications requiring digitally
controlled resistors. Three resistance values are avail-
able for each part type: 50kΩ, 100kΩ, and 200kΩ. A
nominal resistor temperature coefficient of 50ppm/°C
end-to-end and only 5ppm/°C ratiometric makes the
MAX5160 ideal for applications requiring a low-temper-
ature-coefficient variable resistor, such as low-tempco,
adjustable-gain circuit configurations.
The MAX5160 is available in an 8-pin µMAX package,
and the MAX5161 is available in a 6-pin SOT23 pack-
age. Both devices are guaranteed over the extended-
industrial temperature range (-40°C to +85°C).
Applications

LCD Screen Adjustment
Volume Control
Mechanical Potentiometer Replacement
Features
32 Tap Positions50kΩ, 100kΩ, and 200kΩResistance Values400ΩWiper Resistance ±25% Resistance Tolerance 3-Wire Serial Data Input±1LSB DNL ±0.5LSB INL 100nA Supply CurrentSingle-Supply Operation: +2.7V to +5.5V Power-On Reset: Wiper Goes to Midscale
(position 16)
±2kV ESD ProtectionSmall-Footprint Packages
6-Pin SOT23 (MAX5161)
8-Pin µMAX (MAX5160)
Glitchless Switching Between the Resistor Taps
MAX5160/MAX5161
Low-Power Digital Potentiometers
Functional Diagram

19-1435; Rev 1; 4/99
Pin Configurations
Ordering Information
MAX5160/MAX5161
Low-Power Digital Potentiometers
Note 1:
For the MAX5160, linearity is defined in terms of H to L code-dependent resistance.
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VDD= +2.7V to +5.5V, 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
CS, INC, U/Dto GND...............................................-0.3V to +6V
H, L, W to GND..........................................-0.3V to (VDD+ 0.3V)
Input and Output Latchup Immunity ..............................±200mA
Maximum Continuous Current into H, L, and W
MAX516_ _ E _ _..............................................................±1mA
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW
8-Pin µMAX (derate 4.1mW/°C above +70°C)..............330mW
Operating Temperature Range..........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec)............................+300°C
MAX5160/MAX5161
Low-Power Digital Potentiometers
Typical Operating Characteristics

(VDD= +5V, TA= +25°C, unless otherwise noted.)
MAX5160/MAX5161
Low-Power Digital Potentiometers

OUTPUT
50mV/div
INC
2V/div
5μs/div
TAP-TO-TAP SWITCHING TRANSIENT

MAX5160/61 toc07ypical Operating Characteristics (continued)
(VDD= +5V, TA= +25°C, unless otherwise noted.)
Pin Description
MAX5160/MAX5161
Low-Power Digital Potentiometers
Detailed Description

The MAX5160/MAX5161 consist of resistor arrays with
31 resistive elements. Thirty-two tap points are accessi-
ble to the wiper along the resistor string between H and
L. Logic inputs CS, U/D, and INCdetermine the posi-
tion of the wiper. With CSlow and U/Dhigh, a high-to-
low transition on INCincrements the internal counter,
increasing the resistance between W and L. When bothCSand U/Dare low, a high-to-low INCtransition
decrements the internal counter, decreasing the resis-
tance between W and L. At either end (maximum or mini-
mum positions), additional transitions in the direction of
the end points will not change the counter value (the
counter will not wrap around).
The H and L terminals of the MAX5160 are similar to the
two end terminals of a mechanical potentiometer. The
tap W is equivalent to the variable tap (wiper) of the
potentiometer.
The MAX5161 is similar to the MAX5160 except that CS
internally connects to ground and the wiper terminal (W)
is shorted to the high terminal (H). The MAX5161 acts as
a variable resistor (a potentiometer with the wiper and
one end terminal shorted together).
The MAX5160/MAX5161 feature power-on reset circuit-
ry that sets the wiper position to midscale at power-up.
Applications Information

The MAX5160/MAX5161 are intended for circuits
requiring digitally controlled adjustable voltage or
adjustable gain, such as LCD contrast control, where
voltage biasing adjusts the display contrast.
Controlling a Switch-Mode
LCD Bias Generator

Figure 1 shows an application where the MAX5161 is
used with a MAX1771 to make an adjustable positive
LCD-bias circuit. The output of the MAX1771 is a posi-
tive voltage that is digitally controlled through the
MAX5160/MAX5161. Similarly, Figure 2 shows the
application of the MAX5161 in a digitally controlled
negative LCD-bias circuit along with the MAX774/
MAX775/MAX776.
Figure 1. Adjustable Positive LCD Bias
Figure 2. Adjustable Negative LCD Bias
MAX5160/MAX5161
Alternative Positive
LCD Bias Control

Alternatively, use an op amp to provide buffering and
gain to the output of the MAX5160/MAX5161. Connect
the MAX5160 to the positive input of a noninverting op
amp (Figure 3) to select a portion of the input signal by
digitally controlling the wiper terminal. Figure 4 shows a
similar circuit for the MAX5161.
Adjustable Gain

Figure 5 shows how to use the MAX5161 to digitally
adjust the gain of a noninverting op amp configuration.
Connect the MAX5161 in series with a resistor to ground
to form the adjustable gain control of a noninverting
amplifier. The MAX5160/MAX5161 have a low 5ppm/°C
ratiometric tempco that allows for a very stable adjust-
able gain configuration over temperature.
Serial Interface

Figure 6 is the serial-interface timing diagram.
Low-Power Digital Potentiometers

Figure 3. MAX5160 Positive LCD Bias Control
Figure 4. MAX5161 Positive LCD Bias Control
Figure 5. Adjustable Gain Circuit: a) MAX5161; b) MAX5160
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