256-Position/ Ultralow Power 1.8 V Logic-Level Digital Potentiometer
256-Position, Ultralow Power 1.8 V Logic-Level Digital Potentiometer AD5165
FEATURES
Ultralow standby power IDD = 50 nA ...
Description
256-Position, Ultralow Power 1.8 V Logic-Level Digital Potentiometer AD5165
FEATURES
Ultralow standby power IDD = 50 nA typical 256-position End-to-end resistance 100 kΩ Logic high voltage 1.8 V Power supply 2.7 V to 5.5 V Low temperature coefficient 35 ppm/°C Compact thin 8-lead TSOT-8 (2.9 mm × 2.8 mm) package Simple 3-wire digital interface Wide operating temperature −40°C to +125°C Pin-to-pin compatible to AD5160 with CS inverted
FUNCTIONAL BLOCK DIAGRAM
VDD A CS SDI CLK 3-WIRE INTERFACE W
WIPER REGISTER
B
04749-0-001
GND
APPLICATIONS
Battery-operated electronics adjustment Remote utilities meter adjustment Mechanical potentiometer replacement Transducer circuit adjustment Automotive electronics adjustment Gain control and offset adjustment System calibration VCXO adjustment
Figure 1.
PIN CONFIGURATION
W 1 VDD 2
8
A
04749-0-002
B TOP VIEW GND 3 (Not to Scale) 6 CS 5 SDI CLK 4
7
AD5165
GENERAL OVERVIEW
The AD5165 provides a compact 2.9 mm × 2.8 mm packaged solution for 256-position adjustment applications. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. The AD5165’s supply voltage requirement is 2.7 V to 5.5 V, but its logic voltage requirement is 1.8 V to VDD. The AD5165 consumes very low quiescent power during standby mode and is ideal for battery-operated applications. Wiper settings are con...
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