AD7476A/AD7477A/AD7478A are 12-/10-/8-Bit ADCs produced by Analog Devices. The working voltage range is 2.35 V to 5.25 V, the sampling rate is 1 MSPS, and it has low power consumption, wide input bandwidth, flexible power/serial clock speed management, no pipeline delays, high speed serial interface and other features. It is suitable for portable devices, personal digital assistants, medical instruments, mobile communications, instrumentation and control systems, data acquisition systems, high speed modems and optical sensors.
The AD7478A is an 8‑bit successive‑approximation analog‑to‑digital converter that operates from a single 2.35 V to 5.25 V supply and provides up to 1 MSPS throughput. It offers low power consumption, a wide input bandwidth, and a flexible serial interface compatible with SPI, QSPI, Microwire, and DSP protocols.
The document includes functional block diagrams, electrical specifications, timing characteristics, and application notes for battery‑powered systems, PDAs, medical instruments, and high‑speed modems. Ordering information, package options, and evaluation board references are also provided.
| Resolution | 8 Bits |
|---|---|
| Throughput Rate | 1 MSPS max |
| Signal‑to‑Noise Ratio | 71 dB at 100 kHz |
| Input Voltage Range | 0 V to Vop |
| Power Consumption (Normal Mode, Operational) | 17.5 mW max at 5 V |
The AD7478A can sample at up to 1 MSPS.
In normal operational mode it consumes up to 17.5 mW at a 5 V supply.