AD7984BRMZ

ANALOG DEVICES  AD7984BRMZ  模数转换器, 18 bit, 1.33 MSPS, 单, 2.375 V, 2.625 V, MSOP

Product Details

The AD7984 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 AD7984 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.

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 AD7984 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: 1.33 MSPS

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Low power dissipation: 10.5 mW at 1.33 MSPS

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INL: ±2.25 LSB maximum

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Dynamic range: 99.7 dB typical

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True differential analog input range: ±VREF 0 V to VREF 

with VREF between 2.9 V to 5.0 V

Allows use of any input range

Easy to drive with the ADA4941

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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/5 V logic interface

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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 MSOP-8 size and 10-lead 3 mm × 3 mm QFN LFCSP, SOT-23 size