The AD7655 is a 4-channel, 16-bit, 1 MSPS PulSAR® ADC with low cost, low power, low latency, serial and parallel interfaces, and flexible packaging.
The AD7655 is a 4‑channel, 16‑bit PulSAR analog‑to‑digital converter that operates from a single 5 V supply. It offers both parallel and serial (SPI/QSPI/MICROWIRE) interfaces, supports 3 V and 5 V logic, and provides a typical power dissipation of 120 mW in normal mode.
The device features two low‑noise track‑and‑hold amplifiers for simultaneous sampling, a high‑speed conversion engine (up to 1 MSPS normal mode, 888 kSPS impulse mode), and extensive timing specifications. Detailed pin configurations, absolute maximum ratings, and layout recommendations are included for designers.
| Resolution | 16 bits |
|---|---|
| Analog input voltage range | 0 V to 5 V |
| Throughput (normal mode) | 1 MSPS |
| Throughput (impulse mode) | 888 kSPS |
| Power dissipation (typical, normal mode) | 120 mW |
| Operating temperature range | -40 °C to +85 °C |
| Input bandwidth | 10 MHz |
| Signal‑to‑Noise Ratio (100 kHz) | 86 dB |
| Spurious‑Free Dynamic Range (100 kHz) | 98 dB |
The AD7655 can sample at up to 1 MSPS in normal mode.
It provides four analog input channels.
The device operates from a single 5 V supply.
Typical power dissipation is 120 mW.