AD7989-5:  18-Bit, 500 kSPS PulSAR ADCs in MSOP/LFCSP

Product Details

Product Status:Recommended for New Designs

The AD7989-1/AD7989-5 are 18-bit, successive approximation, analog-to-digital converters (ADC) that operate from a single power supply, VDD. They 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 usually swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus. It is 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.


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


  • Low power dissipation
    2 mW at 500 kSPS (VDD only)
    3.5 mW at 500 kSPS (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)
  • SINAD: 97 dB at 1 kHz
  • THD: −120 dB at 10 kHz
  • Dynamic range: 99 dB
  • True differential analog input range: ±VREF
    0 V to VREF with VREF between
    2.4 V and 5.1 V
    Allows use of any input range
    Easy to drive with the ADA4941-1
  • No pipeline delay
  • Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
  • SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface
  • Ability to daisy-chain multiple ADCs
  • 10-lead package: MSOP and 3 mm × 3 mm LFCSP

Functional Block Diagram for AD7989-5

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Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products

Recommended Driver Amplifiers for the AD7989-5

Recommended External Voltage References for the AD7989-5
  • For low drift, low noise and high current output applications, we recommend the ADR435 reference family.
  • For low drift, low noise and low dropout, we recommend the ADR445 reference family.
  • For low drift, low noise, low power, we recommend the ADR4550 reference family.
  • For driving the voltage reference input, we recommend the AD8031 or the AD8655 buffer amplifiers.

Recommended Digital Isolators for the AD7989-5

  • For SPI Interface, lowest power, 2.5 kVrms isolation, we recommend the ADuM1401.
  • For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation, we recommend the ADuM3401.
  • For SPI Interface, low power, 5.0 kVrms isolation, we recommend the ADuM4401.
  • For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V), we recommend the ADuM3481.
Recommended Power Solutions for the AD7989-5
  • For a low noise positive LDO, For 5V systems we recommend the ADM7160, for 12V systems the ADP7118 and 24V systems the ADP7142.
  • For a low noise negative LDO, for 5V, 12V and 24V systems we recommend the ADP7182.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7989-5 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7989-5BCPZ-R2 Status: Production LFCSP:LEADFRM CHIP SCALE 10 Ind Reel, 250 $14.58 $11.95 Y  Material Info PCN Purchase
AD7989-5BCPZ-RL7 Status: Production LFCSP:LEADFRM CHIP SCALE 10 Ind Reel, 1500 - $11.95 Y  Material Info PCN Purchase
AD7989-5BRMZ Status: Production MICRO SOIC 10 Ind Tube, 50 $14.58 $11.95 Y  Material Info Notify Me Purchase Sample
AD7989-5BRMZ-RL7 Status: Production MICRO SOIC 10 Ind Reel, 1000 - $11.95 Y  Material Info Notify Me Purchase
Price Table Help

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.

AD7989-1/AD7989-5 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-AD7989-5SDZ Status: Production Evaluation Board $99.00 Yes -
EVAL-SDP-CB1Z Status: Production Evaluation Board $99.00 Yes -

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.

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