AD7949BCPZRL7

14位， 8通道， 250 kSPS时的PulSAR ADC 14-Bit, 8-Channel, 250 kSPS PulSAR ADC

Product Details

The AD7949 is an 8-channel, 14-bit, charge redistribution successive approximation register SAR analog-to-digital converter ADC that operates from a single power supply, VDD.

The AD7949 contains all components for use in a multichannel, low power data acquisition system, including a true 14-bit SAR ADC with no missing codes; an 8-channel, low crosstalk multiplexer that is useful for configuring the inputs as single-ended with or without ground sense, differential, or bipolar; an internal low drift reference selectable 2.5 V or 4.096 V and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order.

The AD7949 uses a simple SPI interface for writing to the configuration register and receiving conversion results. The SPI interface uses a separate supply, VIO, which is set to the host logic level. Power dissipation scales with throughput.

The AD7949 is housed in a tiny 20-lead LFCSP with operation specified from −40°C to +85°C.

**Applications**

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Multichannel system monitoring

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Battery-powered equipment

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Medical instruments: ECG/EKG

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Mobile communications: GPS

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Personal digital assistants

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Power line monitoring

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Data acquisition

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Seismic data acquisition systems

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Instrumentation

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Process control

### Features and Benefits

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14-bit resolution with no missing codes

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8-channel multiplexer with choice of inputs

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Unipolar single-ended

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Differential GND sense

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Pseudobipolar

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Throughput: 250 kSPS

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INL/DNL: ±0.5/±0.25 LSB typical

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SINAD: 85 dB @ 20 kHz

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THD: −100 dB @ 20 kHz

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Analog input range: 0 V to VREF with VREF up to VDD

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See data sheet for additional features

**AD7949-EP supports defense and aerospace applications AQEC standard**

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Download AD7949-EP data sheet

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Military temperature range  −55°C to +125°C

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Controlled manufacturing baseline

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Enhanced product change notification

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Qualification data available on request

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V62/12645 DSCC Drawing Number