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.