Alternative Parts

  • AD7606-6
    AD7606-6

    Integrated Front End Anti-Alias Filter, Improved Performance, Enhanced feature set

  • ADAS3023
    ADAS3023

    Integrated Front End, Improved Performance, Enhanced feature set

Overview

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

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 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 conventional CMOS processes, iCMOS 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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Product Recommendations

AD7656 Companion Parts

Recommended High Accuracy, Precision References - 2.5V

  • For high accuracy, low noise, low temperature drift: ADR421, ADR431.
  • For applications requiring the lowest noise performance and output trim adjust: ADR441.
  • For wide supply applications: AD780.
  • For cost sensitive applications: AD1582, ADR391.

Recommended Driver Amplifiers

  • For 16 bit applications driving large capacitive loads: AD8610, ADA4627-1.
  • For 16 bit applications requiring ultra low noise, low distortion: AD8597, AD8599.
  • For 16-bit ADC drivers requiring high speed and low noise: AD8021, ADA4899-1.

Recommended Voltage Regulators

  • For low dropout regulators with inputs up to 5V: ADP151, ADP160.
  • For high current switching regulators with inputs up to 5V: ADP2114.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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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.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.