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 from Analog Devices. Both operate from a single 5 V supply; the AD977 provides 100 kSPS throughput while the AD977A reaches 200 kSPS. The devices feature an internal 2.5 V reference, a high‑speed serial interface, and factory‑calibrated linearity.
Key specifications include selectable unipolar (0‑10 V, 0‑5 V, 0‑4 V) and bipolar (+10 V, +5 V, +3.3 V) input ranges, 100 mW maximum power dissipation, 700 kHz full‑power bandwidth, and spurious‑free dynamic range of 90 dB. Detailed timing parameters and pin functions support flexible integration in mixed‑signal systems.
| Resolution | 16 bits |
|---|---|
| Throughput Rate (AD977) | 100 kSPS |
| Throughput Rate (AD977A) | 200 kSPS |
| Power Dissipation | 100 mW max |
| Supply Voltage | 5 V (single supply) |
| Input Voltage Range – Unipolar | 0‑10 V, 0‑5 V, 0‑4 V |
| Input Voltage Range – Bipolar | +10 V, +5 V, +3.3 V |
| Full Power Bandwidth | 700 kHz |
| Spurious Free Dynamic Range | 90 dB |
Both devices operate from a single 5 V supply for analog and digital sections.
Unipolar ranges are 0‑10 V, 0‑5 V, and 0‑4 V; bipolar ranges are +10 V, +5 V, and +3.3 V.
The AD977 dissipates up to 100 mW at maximum performance.
The AD977A provides a throughput rate of 200 kSPS.