AD7656YSTZ Datasheet PDF - ADI

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.

●Please visit next generation product AD7606. Recommended for new designs is the AD7656A pin for pin compatible device with improved PSS robustness. For reduced decoupling requirements visit the AD7656-1 or AD7656A-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