The AD977/AD977A is a high-speed, low-power 16-bit A/D converter that operates from a single 5 V supply. The AD977A has a throughput rate of 200 kSPS whereas the AD977 has a throughput rate of 100 kSPS.
The AD977 and AD977A are high‑speed, low‑power 16‑bit analog‑to‑digital converters that operate from a single 5 V supply. The AD977 provides 100 kSPS throughput, while the AD977A reaches 200 kSPS. Both devices feature factory‑calibrated switched‑capacitor architecture, internal 2.5 V reference, and a serial data interface.
The datasheet details electrical specifications, pin configurations, timing diagrams, and ordering information for the 20‑lead DIP, 20‑lead SOIC and 28‑lead SSOP packages. It also includes absolute‑maximum ratings, power‑supply recommendations, and ESD handling guidelines.
| Resolution | 16 bits |
|---|---|
| Throughput Rate | 100 kSPS (AD977) / 200 kSPS (AD977A) |
| Power Dissipation | 100 mW max |
| Supply Voltage | Single 5 V |
| Input Voltage Ranges | Unipolar 0‑10 V, 0‑5 V, 0‑4 V; Bipolar +10 V, +5 V, +3.3 V |
| Signal‑to‑Noise Ratio (SNR) | 83 dB |
| Total Harmonic Distortion (THD) | -90 dB |
| Full Power Bandwidth | 700 kHz (AD977) / 1 MHz (AD977A) |
| Package Options | 20‑Lead DIP, 20‑Lead SOIC, 28‑Lead SSOP |
The AD977A can operate at a throughput rate of 200 kSPS.
Both devices run from a single 5 V supply.
The AD977 provides 16‑bit resolution.
Unipolar ranges of 0‑10 V, 0‑5 V and 0‑4 V, and bipolar ranges of +10 V, +5 V and +3.3 V are available.