The AD7656A-11 is a reduced decoupling pin- and softwarecompatible version of AD7656A. The AD7656A-1 contains six 16-bit， fast， low power successive approximation ADCs in a package designed on the iCMOS? process （industrial CMOS）。 iCMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs， capable of 33 V operation in a footprint that no previous generation of high voltage devices could achieve. Unlike analog ICs using conventional CMOS processes， iCMOS components can accept bipolar input signals while providing increased performance， which dramatically reduces power consumption and package size. The AD7656A-1 features throughput rates of to 250 kSPS. It contains wide bandwidth （4.5 MHz）， track-and-hold amplifiers that can handle input frequencies up to 4.5 MHz. The conversion process and data acquisition are controlled using the CONVST x signals and an internal oscillator. Three CONVST x pins （CONVST A， CONVST B， and CONVST C） allow independent， simultaneous sampling of the three ADC pairs. The AD7656A-1 has a high speed parallel and serial interface， allowing the device to interface with microprocessors or digital signal processors （DSPs）。 In serial interface mode， the AD7656A-1 has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656A-1 can accommodate true bipolar input signals in the ±4 × VREF range and the ±2 × VREF range. The AD7656A-1 also contains an on-chip 2.5 V reference. Multifunction pin names may be referenced by their relevant function only.