AD7658-1:  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 12-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, ...続きを見る

AD7658-1:  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 12-Bit ADC

製品概要

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 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 range and ±2 × VREF range. The AD7656-1/ AD7657-1/AD7658-1 also contain an on-chip 2.5 V reference.

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

Applications

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

    • 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.

    Data Sheet, Rev. 0, 8/08

    Features

    • Pin and software compatible with AD7656/AD7657/AD7658 featuring reduced decoupling requirements
    • Six 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

    Diagrams

    AD7658-1 Diagram
    Functional Block Diagram for AD7658-1

    仕様

    Resolution (Bits) 12bit
    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 (max) 140mW
    Interface Par,Ser,SPI
    Ain Range 10V p-p,20 V p-p,Bip 10V,Bip 20V
    SNR (dB) n/a
    Pkg Type QFP

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    新製品情報のRSSフィードを取得 続きを見る
    Part# Res Throughput Rate # of Inputs Operating Pwr Diss
    AD7658-1 12 250KSPS 6 140mW
    AD7938 12 1.5MSPS 8 16mW
    AD7864 12 520KSPS 4 120mW
    AD7866 12 1MSPS 4 24mW
    AD7891 12 500KSPS 8 100mW
    AD7862 12 250KSPS 4 75mW
    AD7366 12 1MSPS 4 88.8mW