Analog Devices Inc. AD7656ABSTZ

Description
The AD7656A is a 6-channel, 16-bit, 250 kSPS analog-to-digital converter (ADC) with true bipolar analog inputs. It is designed on the iCMOS process, which combines high voltage silicon with submicron CMOS and complementary bipolar technologies. This allows for high performance analog ICs capable of 33 V operation in a small footprint.
The AD7656A features wide bandwidth (12 MHz) track-and-hold amplifiers that can handle input frequencies up to 12 MHz. The conversion process and data acquisition are controlled using 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 has a high speed parallel and serial interface, allowing it to interface with microprocessors or digital signal processors (DSPs). In serial interface mode, the AD7656A has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface.

Features
Six 16-bit, 250 kSPS ADCs on board
Six true bipolar, high impedance analog inputs
Pin-/software-selectable ranges: ±10 V or ±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
Power-down mode: 100 mW maximum
Improved power supply sequencing (PSS) robustness

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