AD7982BRMZRL7

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1. DESCRIPTION

The AD7982BRMZRL7 is an 18-bit, successive approximation, analog-todigital converter (ADC) that operates from a single power supply, VDD. The AD7982BRMZRL7 contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7982BRMZRL7 samples 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, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput. The serial peripheral interface (SPI)-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. The AD7982BRMZRL7 is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply. The AD7982BRMZRL7 is available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C. 

2. FEATURES

    1. High performance

        - True differential analog input range: ±VREF

           0 V to VREF with VREF between 2.5 V to 5 V 

           Easy to drive with the ADA4941-1 or ADA4940-1

        - Throughput: 1 MSPS

           Zero latency architecture

        - 18-bit resolution with no missing codes

        - INL: ±1 LSB typical, ±2 LSB maximum

        - Dynamic range: 99 dB, VREF = 5 V

        - SNR: 98 dB at fIN = 1 kHz, VREF = 5 V

        - THD: −119 dB at fIN = 1 kHz, VREF = 5 V

        - SINAD: 97 dB at fIN = 1 kHz, VREF = 5 V

    2. Low power dissipation

        - Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface

        - 4 mW at 1 MSPS (VDD only)

        - 7 mW at 1 MSPS (total)

        - 70 μW at 10 kSPS

    3. Proprietary serial interface

        - SPI-/QSPI™/ MICROWIRE™-/DSP-compatible1

    4. Ability to daisy-chain multiple ADCs and busy indicator

    5. 10-lead MSOP and 3 mm × 3 mm 10-lead LFCSP

    6. Wide operating temperature range: −40°C to +85°C

3. APPLICATIONS

    1. Automated test equipment

    2. Data acquisition systems

    3. Medical instruments

    4. Machine automation