What is a Digital potentiometer? Digital Potentiometers are a three terminal device, two fixed end terminals and one wiper terminal which is used to vary the resistance. A Digital potentiometer also known as digipot, is similar to a standard analogue potentiometer, which is a variable resistor except the digital potentiometer has an integrated chip (IC) that accepts a signal input rather than the physical movement of a shaft or slide for adjustment. Potentiometers physically change the resistance value whereas digital potentiometers modify the resistance value via digital inputs rather than a rotary wheel or a slider. Where might I use one? Digital potentiometers would be beneficial where environmental factors would impact a mechanical potentiometer in areas where there is vibration, dust, moisture or grease as digital potentiometers are encapsulated they offer better protection, they are also less vunerable to vibration Digital potentiometers are used to calibrate system tolerances or control system parameters.
What are the advantages over a mechanical potentiometer? Digital potentiometers can be operated in a closed control loop and dont need physical access to be adjusted. . They offer better stability and reliability and as digital will offer additional functionality, some even have on - chip memory Applications System calibration Process control Sensor calibration Smart actuator Voltage margining Programmable power supplies Volume control
Description:
The ADuCM360 is a 3.9kSPS, 24-bit data acquisition
system that incorporates dual multichannel sigma-delta (Σ-Δ) analogue-to-digital converters (ADCs), an ARM Cortex-M3 core processor and memory on a single chip. The ADuCM361 has a single ADC. 2 x 24-bit multichannel Σ-Δ ...
Description:
ROHM's low voltage CMOS comparators (BU7251, BU7231, BU7252,
and BU7232) integrate input full swing / push-pull output functionality and 1 or 2 circuits on single chip. A low operating voltage range of between 1.8V and 5.5V (single supply configuration) and ...
Description:
Dual, Audio Log Taper Potentiometers. Low THD+N and
Crosstalk5V Analog Supply (Independent of Digital Supply)3V to 5V Digital Supply Range. Potentiometer Settings Configurable as NV or Volatile. Zero-Crossing Detector Eliminates Switching Noise. Two User-Configurable Attenuation Options. Configuration Option 1: 63 ...
Description:
The Microchip FTQFN package is a step up
8-pin surface mount 16, 14, and 12-bit, 1 Msps single-channel ADC family devices. It has an analogue supply voltage rating of 1.8. This is a highly efficient 2MHz switching frequency. It supports ...