Product Features

CAV424 Converter ICs for Single and Differential Measurement

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.

Part Number: CAV424
Description: Converter IC for Capacitive Signals

Datasheet CAV424 

Part Descriptions

CAV424 is an integrated capacitance-to-voltage converter. The IC measures the capacitance of a connected capacitive measurement head against a reference capacitance and converts the difference into a DC output voltage. 

CAV424 is an integrated C/V-converter suitable for the capacitance measurement in single or differential capacitive sensor systems. Its output voltage is a linear function of the reciprocal measurement capacitance and it is ratiometric to the supply voltage. The IC is completely analog leading to a fast response time and a resolution only limited by the signal to noise ratio.

CAV424 provides the complete electronics needed for the conversion of single or differential capactive input signals into voltage output signals, which can be an amplified and offset adjusted using external trimming resistors.

Features of CAV424 ICs

• large measurement capacitance range:5 pF up to 40 nF
• suitable for single and differential capacitive sensor heads
• high detection sensitivity
• ratiometric voltage output
• adjustable offset and gain
• fast response time
• integrated temperature sensor
• supply voltage 5V ± 5%
• large temperature range: –40°C...+105°C
• easy-to-use calibration procedure (Excelsheet)
• available in SO16 or as Die
• RoHS conform

Applications of CAV424 ICs

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