AD7981HRMZ

模数转换器 - ADC 16-bit 600ksps 175C SAR ADC

Product Details

The AD7981 is a 16-bit, successive approximation, PulSAR® analog-to-digital converter ADC designed for high temperature operation. The AD7981 is capable of sample rates of up to 600 kSPS while maintaining low power consumption from a single power supply, VDD. It is a fast throughput, high accuracy, high temperature,successive approximation register SAR ADC, packaged in a small form factor with a versatile serial port interface SPI.

On the CNV rising edge, the AD7981 samples an analog input, IN+, between 0 V and REF 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 device 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, or 5 V logic, using the separate supply, VIO.

For space constrained applications, the AD7981 is available in a 10-lead mini small outline package MSOP with operation specified from −55°C to +175°C and 10-lead ceramic flat package FLATPACK with operation specified from −55°C to +210°C. These packages are designed for robustness at extreme temperatures, including monometallic wire bonding, and are qualified for up to 1000 hours of operation at the maximum temperature rating.

The AD7981 is a member of a growing series of high temperature qualified products offered by Analog Devices, Inc. For a complete selection of available high temperature products, see the high temperature product list and qualification data available at www.analog.com/hightemp.

**Applications**

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Downhole drilling and instrumentation

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Avionics

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Heavy industrial

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High temperature environments

### Features and Benefits

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Extreme high temperature operation

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Specified temperature range

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−55°C to +210°C 10-lead FLATPACK

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−55°C to +175°C 10-Lead MSOP

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High performance

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16-bit resolution with no missing codes

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600 kSPS throughput with no latency/pipeline delay

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SNR: 91 dB typical at 1 kHz input frequency

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THD: −102 dB typical at 1 kHz input frequency

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INL: ±2.5 LSB maximum, DNL: ±0.9 LSB maximum

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Low power

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2.25 mW typical at 600 kSPS VDD only

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4.65 mW typical at 600 kSPS total

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75 µW typical at 10 kSPS

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Small footprint

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10-lead, 3 mm × 3 mm, monometallic wire bonding MSOP

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10-lead, 0.255 mm × 0.255 mm, monometallic wire bonding FLATPACK

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Pseudo differential analog input range

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0 V to VREF with VREF between 2.4 V and 5.1 V

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Single-supply 2.5 V operation with 1.8 V to 5 V logic interface

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SPI-/QSPI-/MICROWIRE-/DSP-compatible digital interface

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Daisy-chain multiple ADCs and busy indicator