Overview

Features and Benefits

  • Low power dissipation
    • 2 mW at 500 kSPS typical (VDD only)
    • 3.5 mW at 500 kSPS typical (total)
  • 18-bit resolution with no missing codes
  • Throughput: 500 kSPS
  • INL: ±1 LSB typical, 2 LSB maximum
  • SNR: 98 dB at 1 kHz, VREF = 5 V typical
  • SINAD: 97 dB at 1 kHz typical
  • THD: −120 dB at 10 kHz typical
  • Dynamic range: 99 dB at VREF = 5 V typical
  • True differential analog input voltage range: ±VREF
    • 0 V to VREF with VREF between 2.4 V and 5.1 V
  • No pipeline delay
  • Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface
  • Proprietary serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
  • Ability to daisy-chain multiple ADCs
  • 10-lead MSOP and 3 mm × 3 mm 10-Lead LFCSP

Product Details

The AD7989-1/AD7989-5 are 18-bit, successive approximation, analog-to-digital converters (ADCs) that operate from a single power supply, VDD. The AD7989-1/AD7989-5 contain a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7989-1/AD7989-5 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins typically swing in opposite phases between 0 V and VREF. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.

The AD7989-1/AD7989-5 are serial peripheral interface (SPI)- compatible, which features the ability, using the SDI/CS input, to daisy-chain several ADCs on a single 3-wire bus. The AD7989-1/AD7989-5 are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.

The AD7989-1/AD7989-5 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C.

Applications

  • Battery-powered equipment
  • Data acquisition systems
  • Medical instruments
  • Seismic 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

AD7989-5 Companion Parts

Recommended Digital Isolators

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

Recommended External Voltage References

  • For low drift, low noise, low power: ADR4550.
  • For low drift, low noise and high current output applications: ADR435.
  • For low drift, low noise and low dropout: ADR445.
  • For driving the voltage reference input: AD8031, AD8655.

Recommended Driver Amplifiers

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.