AD7655

Low Cost, 4-Channel, 16-Bit, 500 kSPS PulSAR ADC

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Product Details

The AD7655 is a low cost, simultaneous sampling, dual-channel, 16-bit, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains two low noise, wide bandwidth, track-and-hold amplifiers that allow simultaneous sampling, a high speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports. Each track-and-hold has a multiplexer in front to provide a 4-channel input ADC. The A0 multiplexer control input allows the choice of simultaneously sampling input pairs INA1/INB1 (A0 = low) or INA2/INB2 (A0 = high). The part features a very high sampling rate mode (normal) and, for low power applications, a reduced power mode (impulse) where the power is scaled with the throughput. Operation is specified from −40°C to +85°C.

Product Highlights

  1. Multichannel ADC.
    The AD7655 features 4-channel inputs with two sample-and-hold circuits that allow simultaneous sampling.
  2. Fast Throughput.
    The AD7655 is a 500 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry.
  3. Single-Supply Operation.
    The AD7655 operates from a single 5 V supply. In impulse mode, its power dissipation decreases with throughput.
  4. Serial or Parallel Interface.
    Versatile parallel or 2-wire serial interface arrangements are compatible with both 3 V and 5 V logic.

Applications

  • AC motor control
  • 3-phase power control
  • 4-channel data acquisition
  • Uninterrupted power supplies
  • Communications

Product Lifecycle

checked 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)

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EVAL-AD7655

Product Details

The EVAL-AD7655CBZ is a fully featured evaluation kit for the AD7655. This board operates in stand alone mode or in conjunction with the Evaluation Controller board . When operated with the Evaluation Controller board, software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the Evaluation Controller board.

Documentation

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Product Recommendations

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AD7655 Companion Parts

Recommended Digital Isolators

  • For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V): ADUM3481.
  • For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation: ADUM3401.
  • For SPI Interface, lowest power, 2.5 kVrms isolation: ADUM1401.
  • For SPI Interface, low power, 5.0 kVrms isolation: ADUM4401.

Recommended External Voltage References - 2.5V

  • For high accuracy, low noise, low temperature drift: ADR421, ADR431, ADR4525.
  • For applications requiring the lowest noise performance and output trim adjust: ADR441.
  • For cost sensitive applications: AD1582, ADR391, AD8605.
  • For wide supply applications: AD780.

Recommended Driver Amplifiers

Recommended Voltage Regulators

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

Design Resources

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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.

AD7655 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

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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.


Price Table Help

 
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.