AD5142AWBCPZ10-RL7

Potentiometers, or the more common term pots, are adjustable resistors with a movable contact or wiper, or slider, that can be moved relative to the fixed outer contacts of the resistor. The term \'potentiometer\' suggests electrical potential differences, while the term \'variable resistor\' suggests changes in the resistive value. AD5142AWBCPZ10-RL7 is a digipot, a digital potentiometer which is electronically adjustable in reference to all three terminals of the resistor. With digipots, the value of the resistance or tapping point can be electroniclly adjusted by means of digital or logic command signals.

AD5142AWBCPZ10-RL7 belongs to Data Acquisition - Digital Potentiometers series, and has the access to the 128 wiper positions. Its primary application includes Potentiometer Replacements and Digitally Programmable Attenuators. It includes 10kΩ series resistance and UP/N/UP wiper configuration. It offers low temperature coefficient, low noise and low power consumption solutions and operates in -40℃ to +125℃ operating temperature range. It does not employ mechanical hardware, but instead uses circuit software to control the position of the digital wiper.

AD5142AWBCPZ10-RL7’s working principle is to enable the user to control an accurate voltage division ratio or resistance division over either a fixed resistor or a dynamically changing surface area. The digital wiper is a three-terminal device controlled by micro-controller or logic commands which is capable of providing an accurate, digital division of voltage over a resistor network. When the wiper position is changed, the voltage difference across the two ends of the resistor changes due to the resistance division, and the division ratio is changed accordingly.

The AD5142AWBCPZ10-RL7 device has a high immunity against noise and ESD, since its multiplexed, three-wire SPI serial interface reduces EMI and crosstalk from unshielded cables. Multiplexed SPI serial interface also allows access to all modes, including readback and latch for device synchronization. In modulation applications, the device may be driven by a square wave to allow for dynamic control of the resistance change over time. With an integrated reference voltage source, the device can provide a stable output control and accuracy even when the supply voltage varies.

AD5142AWBCPZ10-RL7 proves to be a highly dynamic, compact and dependable digipot component, which fulfills applications where adaptive gain control, adjustable dynamic data ranges and signal tracking amplifiers are needed. It expands digital systems’ capabilities to include function blocks and signal paths which are otherwise not achievable.