The AD7653 is a 16-bit, 1 MSPS, pulse SAR unipolar ADC with reference, operating from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, internal conversion clock, internal reference, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous conversion rate applications, and a reduced power mode (Impulse) for low power applications where power is scaled with the throughput. The AD7653 is fabricated using Analog Devices’ high performance, 0.6 micron CMOS process, with correspondingly low cost. It is available in a 48-lead LQFP and a tiny 48-lead LFCSP with operation specified from –40°C to +85°C.
The AD7653 is a 16‑bit charge‑redistribution SAR analog‑to‑digital converter that operates from a single 5 V supply. It offers three conversion modes: Warp (1 MSPS), Normal (800 kSPS) and Impulse (666 kSPS), with power dissipation that scales with throughput. The device includes an internal reference, error‑correction circuitry, and both parallel and 2‑wire serial interfaces compatible with 3 V and 5 V logic.
The datasheet provides detailed electrical specifications, timing diagrams, pin configurations, absolute maximum ratings and application hints. Package options are 48‑lead LQFP and 48‑lead LFCSP, and the part is rated for operation from –40 °C to +85 °C. Typical performance includes 86 dB SNR, 98 dB SFDR and a 2 ns aperture delay.
| Resolution | 16 bits |
|---|---|
| Throughput (Warp mode) | 1 MSPS |
| Throughput (Normal mode) | 800 kSPS |
| Throughput (Impulse mode) | 666 kSPS |
| Power dissipation (typical, 666 kSPS) | 92 mW |
| Input voltage range | 0 V to 2.5 V |
| Aperture delay | 2 ns |
| Signal‑to‑Noise Ratio | 86 dB (100 kHz) |
| Spurious‑Free Dynamic Range | 98 dB (100 kHz) |
| Package options | 48‑lead LQFP, 48‑lead LFCSP |
The AD7653 can sample at up to 1 MSPS in Warp mode.
It operates from a single 5 V supply.
The device is offered in 48‑lead LQFP and 48‑lead LFCSP packages.