AD5165

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...