AD7476/AD7477/AD7478 is a high performance, low power, single channel, 1MSPS, 12/10/8-bit ADC with an on-chip high precision reference voltage. It can output 12/10/8-bit digital output, and is suitable for portable devices, personal digital assistants, medical instruments, mobile communications, instruments and control systems, data acquisition systems, high speed modems and optical sensors.
The AD7476, AD7477, and AD7478 are successive‑approximation ADCs offered in a 6‑lead SOT‑23 package. They operate from a single 2.35 V to 5.25 V supply and provide high‑throughput conversion rates up to 1 MSPS while consuming very little power. Each device includes a low‑noise track‑and‑hold amplifier with a wide input bandwidth and supports SPI, QSPI, Microwire, and DSP‑compatible serial interfaces.
Typical applications include battery‑powered systems, personal digital assistants, medical instruments, mobile communications, high‑speed modems, and optical sensors. The parts feature flexible power/clock management, standby mode with 1 pA leakage, and no pipeline delays, making them suitable for compact, energy‑constrained designs.
| Throughput Rate | 1 MSPS max |
|---|---|
| Power Dissipation (Normal Mode Operational) | 5 mW max |
| Resolution | 12‑bit (AD7476), 10‑bit (AD7477), 8‑bit (AD7478) |
| Input Voltage Range | 0 V to Vop |
| Signal‑to‑Noise Ratio (SNR) | ≈70 dB min |
| Package | 6‑lead SOT‑23 |
The AD7478 can sample at up to 1 MSPS.
Normal‑mode operational power dissipation is up to 5 mW.
All three parts are offered in a 6‑lead SOT‑23 package.