Overview

Features and Benefits

  • 8 Simultaneously Sampled Inputs
  • True bipolar analog input ranges: ±10 V, ±5 V
  • Single 5V Analog Supply, 2.3V to +5V VDRIVE
  • 1MΩ Analog Input Impedance
  • 2nd Order Anti-alias Analog Filter
  • 7kV ESD rating on Analog input channels
  • Analog Input Over Voltage Clamp Protection
  • Over-sampling capability with digital filter,
    e.g. 96dB SNR at 50 ksps
  • Fast throughput rate: 200 kSPS for all channels
  • 90dB SNR at 200ksps
  • Low power: 80 mW at 200 kSPS, 10 mW per channel
  • On-chip accurate reference and reference buffer
  • See data sheet for additional features

Product Details

The AD7608 is an 18-bit, 8 channel, simultaneous sampling Analog-to-Digital Data Acquisition system (DAS). The part contains analog input clamp protection, 2nd order anti-alias filter, track and hold amplifier, 18-bit charge redistribution successive approximation ADC, flexible digital filter, 2.5V reference and reference buffer and high speed serial and parallel interfaces. 

The AD7608 operates from a single 5V supply and can accommodate ± 10V and ±5V true bipolar input signals while sampling at throughput rates up to 200 kSPS for all channels. The input clamp protection circuitry can tolerate voltages up to ±16.5V. The AD7608 has 1 MΩ analog input impedance regardless of sampling frequency. The single supply operation, on chip filtering and high input impedance eliminates the need for driver op-amps and external bipolar supplies. The AD7608 antialias filter has a 3 dB cut off frequency of 22 kHz and provides 40 dB anti-alias rejection when sampling at 200ksps. The flexible digital filter is pin driven, yields improvements in SNR, and reduces the 3 dB bandwidth.

Applications

  • Power line monitoring and protection systems
  • Multiphase Motor Control
  • Instrumentation and control systems
  • Multi-axis positioning systems
  • Data Acquisition Systems


Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Product Recommendations

AD7608 Companion Parts

Recommended Digital Isolators

  • For high performance, low power, bidirectional communication: ADUM1402.
  • For isolated power in 3.3V or 5V outputs: ADUM5000.
  • For high performance, low power, bidirectional communication with integrated isolated power: ADUM5402.

Recommended External 2.5V Voltage Reference

  • For high accuracy, low noise and excellent long term stability: ADR421.
  • For high accuracy, low noise and higher output current: ADR431.

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

Discussions

AD7608 Discussions

RE: About the signal FRSTDATA on AD7608
19 week(s) ago in Precision ADCs
RE: AD7608 Analog Filter Pass Band
19 week(s) ago in Precision ADCs
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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.