Data Sheets   Rev 0, 02/2007 (pdf, 432K) Email PDF      Lead(Pb) - Free Data (Data Sheet Help)     Application Notes Evaluation Boards Price, Packaging, and Availability

	Product Description
	The AD7747 is a high-resolution, Σ-Δ capacitance-to-digital converter (CDC). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high...More

Specifications Resolution (Bits) 24bit T-Put Rate 45.5SPS # Chan 1 Pwr Diss (max) 4.25mW Supply V Single(+2.7 to +5.25) Ain Range ± 8 pF (Delta C) , (2Vref) p-p Product Description 24-bit, Cap-to-Dig Conv w/1 SE/Diff Capacitive Input Ch for interface to Single Electrode Cap Sensor Ref Int/Ext Int/Ext Find Similar Products

Functional Block Diagram Enlarge Symbols and Footprints

Features Capacitance-to-digital converter New standard in single chip solutions Interfaces to single or differential grounded sensors Resolution down to 20 aF (that is, up to 19.5-bit ENOB) Accuracy: 10 fF Linearity: 0.01% Common-mode (not changing) capacitance up to 17 pF Full-scale (changing) capacitance range ±8 pF Update rate: 5 Hz to 45 Hz Simultaneous 50 Hz and 60 Hz rejection at 8.1 Hz update Active shield for shielding sensor connection Temperature sensor on-chip Resolution: 0.1°C, accuracy: ±2°C Voltage input channel Internal clock oscillator 2-wire serial interface (I2C® compatible) Power 2.7 V to 5.25 V single-supply operation 0.7 mA current consumption Operating temperature: -40°C to +125°C 16-lead TSSOP package

 

 

Price, Packaging, and Availability Print Table AD7747 Model Options Model Status Package Pins Temp Range Price* (1000 pcs.) Available RoHS Compliant Samples Cart Purchase Cart AD7747ARUZ Prodn 16 ld TSSOP 16 Ind $4.60 5/23/2008 Y Material Declaration Add to Cart Add to Cart AD7747ARUZ-REEL Prodn 16 ld TSSOP 16 Ind $4.60 6/6/2008 Y Material Declaration Contact ADI Add to Cart AD7747ARUZ-REEL7 Prodn 16 ld TSSOP 16 Ind $4.60 - Y Material Declaration Contact ADI Add to Cart EVAL-AD7747EBZ Prodn EVALUATION BOARDS - TBD $129.00 5/23/2008 Y Contact ADI Add to Cart The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing. View Sales and Distribution Offices

 

 

Find Similar Products     Part# Resolution (Bits) T-Put Rate # Chan Supply V Pwr Diss (max) Input Base C (pF Max) Cin Range (pF) Pkg Type Price* (1000 pcs.) Sorry, there are no generics to display. * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing. ** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information. Sorted by Resolution (Ascending), then # of Input Channels (Ascending)