AD7949SCPZ-EP-R2
数据手册.pdf模数转换器 - ADC 8 ch 250ksps 14bit ADC IC
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
