Analog Devices Inc. AD7657YSTZ

Description
The AD7656/AD7657/AD7658 are 250 kSPS, 6-channel, simultaneous-sampling, bipolar 16-/14-/12-bit ADCs. They feature true bipolar analog inputs, pin-/software-selectable ranges (±10 V, ±5 V), and a fast throughput rate. The ADCs are designed on the iCMOS process, which combines high voltage silicon with submicron CMOS and complementary bipolar technologies. This process enables the development of high-performance analog ICs capable of 33 V operation in a small footprint.
The AD7656/AD7657/AD7658 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 have a high speed parallel and serial interface, allowing them 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.

Features
Six 16-/14-/12-bit, 250 kSPS ADCs on board
Six true bipolar, high impedance analog inputs
Pin-/software-selectable ranges: ±10 V, ±5 V
Fast throughput rate: 250 kSPS
CMOS process technology
Low power: 140 mW at 250 kSPS with 5 V supplies
Wide input bandwidth: 250 kSPS, 6-channel, simultaneous sampling, bipolar 16-/14-/12-bit ADC
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

Applications
Power line monitoring systems
Instrumentation and control systems
Multi-axis positioning systems