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AD7656-1:  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC

The AD7656-1/AD7657-1/AD7658-11 are reduced decoupling pin- and software-compatible versions of AD7656/AD7657/AD7658. The AD7656-1/AD7657-1/AD7658-1 devices contain six 16-/ 14-/12-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 ...More

AD7656-1:  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC

Product Description

The AD7656-1/AD7657-1/AD7658-11 are reduced decoupling pin- and software-compatible versions of AD7656/AD7657/AD7658. The AD7656-1/AD7657-1/AD7658-1 devices contain six 16-/ 14-/12-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 parts could achieve. Unlike analog ICs using conven-tional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.

The AD7656-1/AD7657-1/AD7658-1 feature throughput rates of up to 250 kSPS. The parts contain low noise, wide bandwidth 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 signals and an internal oscillator. Three CONVST pins (CONVST A, CONVST B, and CONVST C) allow independent, simultaneous sampling of the three ADC pairs. The AD7656-1/AD7657-1/AD7658-1 have a high speed parallel and serial interface, allowing the devices to interface with microprocessors or DSPs. When the serial interface is selected, each part has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656-1/AD7657-1/ AD7658-1 can accommodate true bipolar input signals in the ±4 × VREF and ±2 × VREF ranges. Each AD7656-1/AD7657-1/ AD7658-1 also contains an on-chip 2.5 V reference.

1 Protected by U.S. Patent No. 6,731,232.

Product Highlights

  1. Six 16-/14-/12-bit, 250 kSPS ADCs on board.
  2. Six true bipolar, high impedance analog inputs.
  3. High speed parallel and serial interfaces.
  4. Reduced decoupling requirements and reduced bill of materials cost compared with the AD7656/AD7657/ AD7658 devices.

Applications

  • Power line monitoring and measuring systems
  • Instrumentation and control systems
  • Multiaxis positioning systems

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EVALUATION BOARDS & DEVELOPMENT KITS

  • Pin and software compatible with AD7656/AD7657/AD7658 featuring reduced decoupling requirements
  • 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
  • See Data Sheet for Additional Information
  • Resolution (Bits): 16bit
  • T-Put Rate: 250kSPS
  • # Chan: 6
  • Supply V: (±15, +5An, +5Dig, +3Drv),(±15, +5An, +5Dig, +5Drv),(±5, +5An, +5Dig, +3Drv),(±5, +5An, +5Dig, +5Drv)
  • Pwr Diss: 140mW
  • Interface: Par,Ser,SPI
  • Ain Range: 10V p-p,20 V p-p,Bip 10V,Bip 5.0V
  • SNR (dB): 88dB
  • Pkg Type: QFP

Functional Block Diagram for AD7656-1

Similar Products

arrow View Full Interactive Product Selection Table
Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7656-1 16 250KSPS 6 140mW
AD7654 16 500KSPS 4 135mW
AD7655 16 1MSPS 4 135mW
AD7657-1 14 250KSPS 6 140mW
AD7682 16 250KSPS 4 19.2mW
AD7689 16 250KSPS 8 19.2mW
AD7658-1 12 250KSPS 6 140mW
AD7610 16 250KSPS 1 110mW
AD7621 16 3MSPS 1 86mW
AD7622 16 2MSPS 1 85mW
AD7623 16 1.33MSPS 1 55mW
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.