●Product Details
●The AD7656/AD7657/AD7658 contain six 16-/14-/12-bit, fast, low power, successive approximation ADCs all in the one package that is designed on the _i_CMOS™ process (industrial CMOS). _i_CMOS 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 parts could achieve. Unlike analog ICs using conventional CMOS processes, _i_CMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.
●The AD7656/AD7657/AD7658 feature throughput rates up to 250 kSPS. The parts contain low noise, wide bandwidth, track-and-hold amplifiers that can handle input frequencies up to 12 MHz.
●The conversion process and data acquisition are controlled using CONVST signals and an internal oscillator. Three CONVST pins allow independent, simultaneous sampling of the three ADC pairs. The AD7656/AD7657/AD7658 all have a high speed parallel and serial interface, allowing the devices to interface with microprocessors or DSPs. In serial interface mode, the parts have a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656/ AD7657/AD7658 can accommodate true bipolar input signals in the ±4 × VREF range and ±2 × VREF range. The AD7656/ AD7657/AD7658 also contain an on-chip 2.5 V reference.
●For reduced decoupling requirements visit the AD7658-1 product page.
●Product Highlights
● 1. Six 16-/14-/12-bit, 250 kSPS ADCs on board.
● 2. Six true bipolar, high impedance analog inputs.
● 3. Parallel and high speed serial interfaces.
●Applications
● Power line monitoring systems
● Instrumentation and control systems
● Multi-axis positioning systems
●### Features and Benefits
● 6 independent ADCs
● True bipolar analog inputs
● Pin-/software-selectable ranges: ±10 V, ±5 V
● Fast throughput rate: 250 kSPS
● iCMOS process technology
● Low power
●140 mW at 250 kSPS with 5 V supplies
● Wide input bandwidth 86.5 dB SNR at 50 kHz input frequency
● On-chip reference and reference buffers
● Parallel, serial, and daisy-chain interface modes
● High speed serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
● Standby mode: 100 µW maximum
● 64-lead LQFP
