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CAV444 - C/V-Converter IC with Linear Voltage Output

Package variants of the C/V-converter IC CAV444
CAV444 is a capacitance-to-voltage converter IC for the measurement of single capacitances. Its ratiometric output voltage signal is proportional to the input capacitance. CAV444 can be used as stand-alone IC or as front end for µC. Its wide capacitance measurement range and high sensitivity allow various 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 range10 pF .. 10 nF
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 Circuit with Blockdiagram

CAV444 with single input capacitance and adjustable, analog ratiometric voltage output (e.g. 1 .. 4 V).
CAV444 with single input capacitance and adjustable, analog ratiometric voltage output.




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
CAV444-0-SO16SO16(n) package
CAV444-WAFsawn 6″ wafer on blue foil
CAV444-AdaptCAV444 soldered to a SO16-DIL16 adapter




Accessories

Order NumberDescriptionQuote
BBCAV444A preassembled breadboard with easily adaptable capacitance range. Suitable for first experiments using CAV444. Please see the document CAV444_BB for further information.




General Documents

Datasheet CAV444
Product flyer CAV444
IC package catalog
For die size and padout please contact sales@analogmicro.de.

Design Support

Excel dimensioning and calibration sheet for CAV444.
User guide for CAV444's breadboard.
Application note: Construction of capacitive sensors with 0 .. 5 V or 0 .. 10 V output
Application note: Construction of capacitive sensors with 4 .. 20 mA output