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
● Multichannel system monitoring
● Battery-powered equipment
● Medical instruments: ECG/EKG
● Mobile communications: GPS
● Personal digital assistants
● Power line monitoring
● Data acquisition
● Seismic data acquisition systems
● Instrumentation
● Process control
●### Features and Benefits
● 14-bit resolution with no missing codes
● 8-channel multiplexer with choice of inputs
● Unipolar single-ended
● Differential (GND sense)
● Pseudobipolar
● Throughput: 250 kSPS
● INL/DNL: ±0.5/±0.25 LSB typical
● SINAD: 85 dB @ 20 kHz
● THD: −100 dB @ 20 kHz
● Analog input range: 0 V to VREF with VREF up to VDD
● See data sheet for additional features
●AD7949-EP supports defense and aerospace applications (AQEC standard)
● Download AD7949-EP data sheet
● Military temperature range (−55°C to +125°C)
● Controlled manufacturing baseline
● Enhanced product change notification
● Qualification data available on request
● V62/12645 DSCC Drawing Number
