AD5247

Features:

128-position
End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Ultracompact SC70-6 (2 mm * 2.1 mm) package
I²C^® compatible interface
Full read/write of wiper register
Power-on preset to midscale
Single supply 2.7 V to 5.5 V
Low temperature coefficient 45 ppm/°C
Low power, IDD = 3 µA typical
Wide operating temperature 40°C to +125°C
Evaluation board available





Application

Mechanical potentiometer replacement in new designs
Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
RF amplifier biasing
LCD brightness and contrast adjustment
Automotive electronics adjustment
Gain control and offset adjustment





Pinout








Specifications

VDD to GND 0.3 V to +7 V
VA, VW to GND VDD
Terminal Current, AxBx, AxWx, BxWx
Pulsed² ±20 mA
Continuous ±5 mA
Digital Inputs and Output Voltage to GND 0 V to VDD+ 0.3 V
Operating Temperature Range 40°C to +125°C
Maximum Junction Temperature (TJMAX)150°C
Storage Temperature 65°C to +150°C
Lead Temperature (Soldering, 10 sec) 300°C
Thermal Resistance³_JA: SC70-6 340°C/W






Description

The AD5247 provides a compact 2 mm × 2.1 mm packaged solution for 128-position adjustment applications. This device performs the same electronic adjustment function as a mechanical potentiometer or a variable resistor. Available in four different end-to-end resistance values (5 kΩ, 10 kΩ, 50 kΩ,
100 kΩ), these low temperature coefficient devices AD5247 are ideal for high accuracy and stability variable resistance adjustments. The wiper settings are controllable through the I²C compatible digital interface, which can also be used to read back the present wiper register control word. The resistance between the wiper and either end point of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC1 latch. Operating from a 2.7 V to 5.5 V power supply and consuming 3 µA allows for usage in portable battery-operated applications.