AD5248

Data Sheet Dual, 256-Position, I2C-Compatible Digital Potentiometers AD5243/AD5248 FEATURES 2-channel, 256-position potentiometers End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ Compact 10-lead MSOP (3 mm × 4.9 mm) package Fast settling time: tS = 5 µs typical on power-up Full read/write of wiper register Power-on preset to midscale Extra package address decode pins: AD0 and AD1 (AD5248 only) Computer software replaces microcontroller in factory programming applications Single supply: 2.7 V to 5.5 V Low temperature coefficient: 35 ppm/°C Low power: IDD = 6 µA maximum Wide operating temperature: −40°C to +125°C Evaluation board available FUNCTIONAL BLOCK DIAGRAMS A1 W1 B1 A2 W2 B2 VDD GND SDA SCL WIPER REGISTER 1 WIPER REGISTER 2 AD5243 PC INTERFACE Figure 1. AD5243 W1 B1 W2 B2 04109-0-001 APPLICATIONS Systems calibrations Electronics level settings Mechanical trimmers replacement in new designs Permanent factory printed circuit board (PCB) setting Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Gain control and offset adjustment GENERAL DESCRIPTION The AD5243 and AD5248 provide a compact 3 mm × 4.9 mm packaged solution for dual, 256-position adjustment applications. The AD5243 performs the same electronic adjustment function as a 3-terminal mechanical potentiometer, and the AD5248 performs the same adjustment function as a 2-terminal variable resistor. Available in four end-to-end resistance ...