Alternative Parts

Overview

Features and Benefits

  • High performance
    • Pseudo differential analog input range 0 V to VREF with VREF from 2.5 V to 5.0 V
    • Throughput: 500 kSPS/100 kSPS options Zero latency architecture
    • 16-bit resolution with no missing codes
    • INL: ±0.6 LSB typical, ±1.25 LSB maximum
    • Dynamic range: 92 dB, VREF = 5 V
    • SNR: 91.5 dB at fIN = 10 kHz, VREF = 5 V
    • THD: −114 dB at fIN = 10 kHz, VREF = 5 V
    • SINAD: 91 dB at fIN = 10 kHz, VREF = 5 V
  • Low power dissipation
    • Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
    • AD7988-1: 400 μW at 100 kSPS (VDD only)
      • 700 μW at 100 kSPS (total)
    • AD7988-5: 2 mW at 500 kSPS (VDD only)
      • 3.5 mW at 500 kSPS (total)
    • 70 μW at 10 kSPS (total)
  • Proprietary SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface
  • 10-lead MSOP, 10-lead 3 mm × 3 mm LFCSP
  • Wide operating temperature range: −40°C to +125°C

Product Details

The AD7988-1/AD7988-5 are 16-bit, successive approximation, analog-to-digital converters (ADC) that operate from a single power supply, VDD. The AD7988-1 offers a 100 kSPS throughput, and the AD7988-5 offers a 500 kSPS throughput. They are low power, 16-bit sampling ADCs with a versatile serial interface port. On the CNV rising edge, they sample an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD.

The SPI-compatible serial interface also features the ability to daisy-chain several ADCs on a single 3-wire bus using the SDI input. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply, VIO.

The AD7988-1/AD7988-5 generics are housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C.

Applications

  • Automated test equipment
  • Data acquisition systems
  • Medical instruments
  • Machine automation

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 (2)

Tools & Simulations

Precision ADC Driver Tool

The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input

Precision-ADC-Driver-2

IBIS Models

AD7988-1 IBIS Models

Reference Designs (3)

Product Recommendations

AD7988-1 Companion Parts

Recommended Digital Isolators

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

Recommended Driver Amplifiers

Recommended External Voltage References

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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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.