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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5438 Datasheet

+-15V 128-Tap Low-Drift Digital Potentiometers

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19-2657; Rev 3; 9/04
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±15V, 128-Tap, Low-Drift Digital Potentiometers
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 (VDD and VSS) that require
VDD - VSS to 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 - VSS and VCC -
VSS are 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
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Features
+10V to +30V Single-Supply Operation
-28V to -10V Single Negative Supply Operation
±5V to ±15V Dual-Supply Operation
128 Tap Positions
Uncommitted 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 Taps
3-Wire SPI/QSPI/MICROWIRE-Compatible Serial
Interface
50k/100kEnd-to-End Resistances
Power-On Reset: Wiper Goes to Midscale
(Position 64)
Ordering Information
PART
MAX5436EUB
MAX5437EUD
MAX5438EUB
MAX5439EUD
TEMP RANGE
PIN-
PACKAGE
-40°C to +85°C 10 µMAX
-40°C to +85°C 14 TSSOP
-40°C to +85°C 10 µMAX
-40°C to +85°C 14 TSSOP
RESISTANCE
(k)
50
50
100
100
Pin Configurations
TOP VIEW
SCLK 1
DIN 2
CS 3
GND 4
VSS 5
MAX5436
MAX5438
µMAX
10 VCC
9L
8W
7H
6 VDD
SCLK 1
DIN 2
CS 3
SHDN 4
GND 5
VSS 6
OUT 7
MAX5437
MAX5439
14 VCC
13 L
12 W
11 H
10 VDD
9 IN+
8 IN-
TSSOP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5438 Datasheet

+-15V 128-Tap Low-Drift Digital Potentiometers

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±15V, 128-Tap, Low-Drift Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
VDD to GND, VSS = GND........................................-0.3V to +34V
VSS to GND, VDD = GND........................................-34V to +0.3V
VDD to VSS ..............................................................-0.3V to +34V
VDD to VCC ........................................................-6.3V to +28.75V
VCC to VSS ..............................................................-0.3V to +34V
VCC to 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
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.
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
TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC PERFORMANCE (voltage-divider mode)
Resolution
2N
128 Taps
Integral Nonlinearity
INL (Note 1)
±1 LSB
Differential Nonlinearity
DNL (Note 1)
±1 LSB
End-to-End Resistor Tempco
Ratiometric Resistor Tempco
TCR
35 ppm/°C
5 ppm/°C
Full-Scale Error
RHL = 50k(MAX5436/MAX5437)
-0.3 LSB
Zero-Scale Error
Full-Scale Error
RHL = 50k(MAX5436/MAX5437)
RHL = 100k(MAX5438/MAX5439)
+0.3
-0.15
LSB
LSB
Zero-Scale Error
RHL = 100k(MAX5438/MAX5439)
DC PERFORMANCE (variable-resistor mode)
Resolution
2N
+0.15
128
LSB
Taps
Integral Nonlinearity
INL (Note 2)
±1 LSB
Differential Nonlinearity
DNL (Note 2)
±1 LSB
DC PERFORMANCE (resistor characteristics)
Wiper Resistance
Wiper Capacitance
End-to-End Resistance
WR (Note 3)
WC Midscale
MAX5438/MAX5439
RHL
MAX5436/MAX5437
0.9 2
6
75 100 125
37.5 50 62.5
k
pF
k
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
VCC = 4.75V to 5.25V (Note 4)
VCC = 4.75V to 5.25V
2.4 V
0.8 V
2 _______________________________________________________________________________________


Part Number MAX5438
Description +-15V 128-Tap Low-Drift Digital Potentiometers
Maker Maxim Integrated Products
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MAX5438 Datasheet PDF






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