AD7949: 14-Bit, 8-Channel, 250 kSPS PulSAR ADC Data Sheet (Rev. F)9/24/2015749K
AD7949-EP: Enhanced Product Data Sheet (Rev. B)9/24/2015310 K
AD7949-DSCC: Military Data Sheet9/24/2015
Features and Benefits
- 14-bit resolution with no missing codes
- 8-channel multiplexer with choice of inputs
Differential (GND sense)
- Multiple reference types
Internal selectable 2.5 V or 4.096 V
External buffered (up to 4.096 V)
External (up to VDD)
- See datasheet for additional features
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.
- 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
- Process control
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The EVAL-AD7949EDZ is a fully featured evaluation Kit for the AD7949. This board operates in stand alone mode or in conjunction with the Converter Evaluation and Development board, EVAL-CED1Z . When operated with the Converter Evaluation and Development board, software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the Converter Evaluation and Development board.
Documentation & Resources
Tools & Simulations
AD7949 Companion Parts
Recommended Driver Amplifiers
For precision, low power, low distortion applications
: ADA4805-1, ADA4805-2, ADA4841-1, ADA4841-2.
- For a fully differential attenuating precision amplifier: AD8475.
- For low noise, low power single-to-differential driver amplifier: ADA4941-1.
- For 5V single supply and low noise: AD8655.
High frequency, low noise, low distortion applications
: ADA4807-1, ADA4807-2, ADA4897-1, ADA4897-2.
Recommended External References
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|AD7949BCPZ||Material Declaration||Reliability Data||20-Lead LFCSP (4mm x 4mm w/ EP)|
|AD7949BCPZRL7||Material Declaration||Reliability Data||20-Lead LFCSP (4mm x 4mm w/ EP)|
|AD7949SCPZ-EP-R2||Material Declaration||Reliability Data||20-Lead LFCSP (4mm x 4mm w/ EP)|
|AD7949SCPZ-EP-RL7||Material Declaration||Reliability Data||20-Lead LFCSP (4mm x 4mm w/ EP)|
|Wafer Fabrication Data|
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Support & Discussions
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Please see the latest communication from our CCO regarding lead times.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.