AD7982BRMZRL7

采用MSOP / QFN封装的18位， 1 MSPS PulSAR系列7.0 mW的ADC 18-Bit, 1 MSPS PulSAR 7.0 mW ADC in MSOP/QFN

Product Details

The AD7982 is an 18-bit, successive approximation, analog-to- digital converter ADC that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7982 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, 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 and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply.

The AD7982 is available in a 10-lead MSOP or a 10-lead QFN LFCSP with operation specified from −40°C to +85°C.

**Applications**

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Battery-powered equipment

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Data acquisition systems

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Medical instruments

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Seismic data acquisition systems

### Features and Benefits

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18-bit resolution with no missing codes

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Throughput: 1 MSPS

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Low power dissipation

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4 mW at 1 MSPS VDD only

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7 mW at 1 MSPS total

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70 μW at 10 kSPS

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INL: ±1 LSB typical, ±2 LSB maximum

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Dynamic range: 99 dB typical

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True differential analog input range: ±VREF

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0 V to VREF with VREF between 2.5 V to 5.0 V

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Allows use of any input range

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

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No pipeline delay

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

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Proprietary serial interface SPI-/QSPI™/ MICROWIRE™-/DSP-compatible

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Ability to daisy-chain multiple ADCs and busy indicator

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10-Lead MSOP and 3 mm × 3 mm 10-Lead LFCSP