The AD7171 is a very low power 16-bit analog-to-digital converter (ADC). It has an output data rate of 125 Hz and features pin-programmable power-down and reset functions. It is suitable for applications such as weigh scales, pressure measurement, industrial process control, and portable instrumentation.
The AD7171 is a very low‑power 16‑bit analog‑to‑digital converter featuring a precision sigma‑delta modulator and an on‑chip oscillator. It operates from 2.7 V to 5.25 V, consumes 135 µA in normal mode and 5 µA in power‑down mode, and provides a single differential input with a gain of 1. The device delivers an output data rate of 125 Hz and a typical settling time of 24 ms.
The datasheet includes specifications, pin descriptions, timing diagrams, absolute maximum ratings, thermal resistance, and application notes such as temperature‑measurement and signal‑conditioning circuits. It also provides recommended external filtering and layout guidelines for optimal performance.
| Output data rate | 125 Hz |
|---|---|
| Power supply voltage | 2.7 V to 5.25 V |
| Supply current (normal mode) | 135 µA |
| Effective number of bits (ENOB) | 16 bits |
| RMS noise (5 V reference) | 11.5 µV |
| Power‑down current | 5 µA |
| Differential input voltage range | ±VREF |
The AD7171 provides an output data rate of 125 Hz.
In power‑down mode the device consumes about 5 µA.