End-to-end resistance 10 k鈩? 50 k鈩? 100 k鈩?/div>
Low temperature coefficient 35 ppm/擄C
Power-on preset to midscale
SPI compatible interface
Automotive temperature range 鈥?0擄C to +105擄C
Compact MSOP-10 (3 mm 脳 4.9 mm) package
APPLICATIONS
Programmable Gain and Offset
Programmable Power Supply
Industrial Actuator Control
LED Array Driver
Audio Volume Control
General Purpose DAC Replacement
Mechanical Potentiometer Replacement
Compact +30V/鹵15V 256-Position Digital
Potentiometer
AD5290
MSOP-10 package. AD5290 can be operated from a single
supply +2.7 V to +30 V or dual supply 鹵2.7 V to 鹵15 V. All
parts are guaranteed to operate over the automotive
temperature range of -40擄C to +105擄C.
FUNCTIONAL BLOCK DIAGRAM
AD5290
SDO
Q
8-Bit
SERIAL
REG
V
DD
A
8
8-Bit
LATCH
8
W
B
V
SS
SDI
CLK
CS
D
CK
RS
GENERAL OVERVIEW
The AD5290 is a low cost, compact 2.9 mm 脳 3 mm
+30V/鹵15V, 256-position digital potentiometer. This device
performs the same electronic adjustment function as
mechanical potentiometers or variable resistors, with enhanced
resolution, solid-state reliability, and superior low temperature
coefficient performance.
The wiper settings are controllable through an SPI compatible
digital interface. The resistance between the wiper and either
end point of the fixed resistor varies linearly with respect to the
digital code transferred into the RDAC latch.
The AD5290 is available in 10k, 50k, and 100k鈩?in compact
POR
DG ND
Figure 1.
Note:
The terms
digital potentiometer
and
RDAC
are used interchangeably.
Rev. PrC
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