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MAX5439EUDMAXIMN/a10avai+/-15 V, 100 kom, dual, 128-tap, low-drift digital potentiometer


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MAX5439EUD
+/-15 V, 50 kom, dual, 128-tap, low-drift digital potentiometer
General Description
The MAX5436–MAX5439 are 128-tap high-voltage (±5V
to ±15V) digital potentiometers in packages that are half
the size of comparable devices in 8-pin SO. They perform
the same function as mechanical potentiometers, but
replace the mechanics with a simple digital interface. The
digital logic is powered by a separate single +2.7V to
+5.25V supply voltage (VCC). The resistor string uses its
own analog supplies (VDDand VSS) that require
VDD- VSSto be greater than 9V and less than 31.5V. This
allows for greater flexibility in voltage ranges that can be
used with these devices. Examples of analog supply
ranges include not only dual voltages of ±5V to ±15V, but
single-supply voltages, such as +10V, +15V, +30V, -30V,
and more, as long as the ranges of VDD- VSSand VCC-
VSSare met.
The MAX5437/MAX5439 include an on-chip, high-
voltage, uncommitted amplifier, providing additional
reductions in board space and cost. Other features
include low 35ppm/°C end-to-end and 5ppm/°C ratio-
metric resistor temperature coefficients, a 3-wire SPI™/
QSPI™/MICROWIRE™-compatible serial interface, and
a power-on reset to midscale.
The MAX5436/MAX5438 are available in 10-pin µMAX
packages. The MAX5437/MAX5439 are available in 14-
pin TSSOP package. Each device is guaranteed over
the extended temperature range of -40°C to +85°C.
Applications

LCD Screen Contrast Adjustment
Data-Acquisition Systems
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier
Audio Volume Control
Features
+10V to +30V Single-Supply Operation-28V to -10V Single Negative Supply Operation±5V to ±15V Dual-Supply Operation128 Tap PositionsUncommitted High-Voltage Amplifier
(MAX5437/MAX5439)
Low Temperature Coefficient
35ppm/°C (End-to-End)
5ppm/°C (Ratiometric)
Small-Footprint Packages
10-Pin µMAX (MAX5436/MAX5438)
14-Pin TSSOP (MAX5437/MAX5439)
Glitchless Switching Between the Resistor Taps3-Wire SPI/QSPI/MICROWIRE-Compatible Serial
Interface
50kΩ/100kΩEnd-to-End ResistancesPower-On Reset: Wiper Goes to Midscale
(Position 64)
MAX5436–MAX5439
±15V, 128-Tap, Low-Drift Digital Potentiometers
Pin Configurations
Ordering Information

19-2657; Rev 2; 7/04
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX5436–MAX5439
±15V, 128-Tap, Low-Drift 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, VSS= GND........................................-0.3V to +34V
VSSto GND, VDD= GND........................................-34V to +0.3V
VDDto VSS..............................................................-0.3V to +34V
VDDto VCC........................................................-6.3V to +28.75V
VCCto VSS..............................................................-0.3V to +34V
VCCto GND..............................................................-0.3V to +6V
DIN, SCLK, CS, SHDN...............................-0.3V to (VCC+ 0.3V)
H, L, W, IN+, IN-, OUT.....................(VSS- 0.3V) to (VDD+ 0.3V)
Maximum Continuous Current into H, L, and W
MAX5436–MAX5439.......................................................±1mA
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX (derate 6.94mW/°C above +70°C).........556mW
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= +15V, VSS= -15V, VCC= +5V, VH= VDD, VL= VSS, TA= -40°C to +85°C, unless otherwise noted. Typical values are at = +25°C, unless otherwise noted.)
MAX5436–MAX5439
±15V, 128-Tap, Low-Drift Digital Potentiometers
ELECTRICAL CHARACTERISTICS (continued)

(VDD= +15V, VSS= -15V, VCC= +5V, VH= VDD, VL= VSS, TA= -40°C to +85°C, unless otherwise noted. Typical values are at
MAX5436–MAX5439
±15V, 128-Tap, Low-Drift Digital Potentiometers
ELECTRICAL CHARACTERISTICS (continued)

(VDD= +15V, VSS= -15V, VCC= +5V, VH= VDD, VL= VSS, TA= -40°C to +85°C, unless otherwise noted. Typical values are at = +25°C, unless otherwise noted.)
wiper terminal is unloaded.
Note 2:
The DNL and INL are measured with the potentiometer configured as a variable resistor. H is unconnected and L = VSS.
The wiper terminal is driven with a source current of 80µA for the 50kΩconfiguration and 40µA for the 100kΩconfiguration.
Note 3:
The wiper resistance is measured assuming the source currents given in Note 2.
Note 4:
The device draws current in excess of the specified supply current when the digital inputs are driven with voltages between
(VCC- 0.5V) and (GND to 5V). See Supply Current vs. Digital Input Voltage in the Typical Operating Characteristicssection.
Note 5:
Guaranteed by design and characterization.
Typical Operating Characteristics

(VDD= +15V, VSS= -15V, VCC= +5V, VH= VDD, VL= VSS, TA= +25°C, unless otherwise noted.)
MAX5436–MAX5439
±15V, 128-Tap, Low-Drift Digital Potentiometers
W-TO-L RESISTANCE CHANGE
vs. INPUT CODE

INPUT CODE
RESISTANCE (k
MIDSCALE SWITCHING TRANSIENT
(CODE 63 TO CODE 64)
MAX5436 toc07
100ns/div
2V/div
VW-L
100mV/div
VARIABLE-RESISTOR DNL
vs. INPUT CODE (50kΩ)

MAX5436 toc08
INPUT CODE
DNL (LSB)
VARIABLE-RESISTOR DNL
vs. INPUT CODE (100kΩ)
MAX5436 toc09
INPUT CODE
DNL (LSB)
VARIABLE-RESISTOR INL
vs. INPUT CODE (100kΩ)
MAX5436 toc11
INPUT CODE
INL (LSB)
VOLTAGE-DIVIDER DNL
vs. INPUT CODE (50kΩ)
MAX5436 toc12
INPUT CODE
DNL (LSB)
VARIABLE-RESISTOR INL
vs. INPUT CODE (50kΩ)
MAX5436 toc10
INPUT CODE
INL (LSB)
Typical Operating Characteristics (continued)
(VDD= +15V, VSS= -15V, VCC= +5V, VH= VDD, VL= VSS, TA= +25°C, unless otherwise noted.)
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