The AD7711A is a complete analog front end for low frequency measurement applications. It features 24 bits of no missing codes performance, programmable gain front end, programmable filter cutoffs, and the ability to read/write calibration coefficients.
The AD7711A is a complete analog front‑end for low‑frequency measurement applications. It provides a 24‑bit sigma‑delta conversion with programmable gain (1‑128), differential inputs, and an on‑chip 400 µA RTD excitation current. The device can operate from a single supply (5‑10 V) or dual‑supply configurations and includes self‑calibration, system calibration, and background calibration features.
The handbook includes functional block diagrams, pin configurations, timing characteristics, power‑requirement tables, and detailed static performance specifications such as non‑linearity (+0.0015 % FSR) and noise levels. It also outlines absolute maximum ratings, ESD sensitivity, and recommended operating conditions for reliable use in microcontroller‑based systems.
| Resolution | 24 bits (no missing codes) |
|---|---|
| Integral Nonlinearity | +0.0015 % FSR (filter notches < 60 Hz) |
| Supply Voltage (AVpp) | 5 V to 10 V nominal |
| Reference Output Voltage | 2.5 V nominal |
The AD7711A provides a 24‑bit resolution with no missing codes.
It operates from 5 V to 10 V nominal (AVpp) with a ±5 % tolerance for specified performance.