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CAV424 - C/V-Converter for Single and Differential Measurement

Package variants of the C/V-converter IC CAV424
CAV424 is an integrated capacitance-to-voltage converter suitable for the measurement of single or differential input capacitances. It generates a ratiometric output voltage signal and can be used as front end for µC. The IC's wide measurement range, low EM susceptibility and high sensitivity allow a multitude of applications.

Applications

  • Humidity measurement
  • Distance measurement
  • Capacitive pressure sensors
  • Level sensing
  • Material identification
  • Object detection

  • Humidity measurement
  • Distance measurement
  • Capacitive pressure sensors
  • Level sensing
  • Material identification
  • Object detection
 

Short Specifications

Supply Voltage (VCC)5 V ± 5%
Capacitance input range5 pF .. 40 nF (single), 0 .. 40 nF (differential)
Voltage output1 .. 4 V (ratiometric), adjustable
Reference voltage2.5 V (ratiometric)
Temperature range-40 °C .. 105 °C
Temperature sensor output2.20 .. 2.45 V (8 mV/K)
Package / Delivery formsSO16, on DIL16-adapter, sawn 6″ wafer on blue foil




Typical Application Circuits with Blockdiagram

Differential capacitance measurement with CAV424 as analog front end for a µC.
CAV424 used for differential capacitance measurements.

CAV424 with single input capacitance and adjustable, analog ratiometric voltage output.
CAV424 used for single input capacitance measurements.




Ordering Codes and Product Inquiry / Samples

For product inquiry choose your desired product and you will be redirected to the inquiry form then.
Order numberDelivery formInquiry
CAV424-0-SO16SO16(n) package
CAV424-WAFsawn 6″ wafer on blue foil
CAV424-AdaptCAV424 soldered to a SO16-DIL16 adapter




Accessories

Order NumberDescriptionQuote
BBCAV424A preassembled breadboard with easily adaptable capacitance range. Suitable for first experiments using CAV424. Please see the document CAV424_BB for further information.




General Documents

Datasheet CAV424
Product flyer CAV424
IC package catalog
For die size and padout please contact sales@analogmicro.de.

Design Support

Excel dimensioning and calibration sheet for CAV424.
User guide for CAV424's breadboard.