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CAV414

Description
Converter IC for Capacitive Signals
CategoryThe sensor    Sensor/transducer   
File Size67KB,6 Pages
ManufacturerAnalogMicroElectronics,Inc.(AME)
AMT was founded in Taiwan in November 2000 and merged into AMT Microelectronics, Inc., a US company located in Silicon Valley, California, USA. Its stock was officially listed for public trading in March 2004.
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CAV414 Overview

Converter IC for Capacitive Signals

CAV414 Parametric

Parameter NameAttribute value
MakerAnalogMicroElectronics,Inc.(AME)
Reach Compliance Codecompli

CAV414 Preview

Download Datasheet
Converter IC for Capacitive Signals
FEATURES
Wide Supply Voltage Range: 6...35V
Wide Operating Temperature Range:
–40°C...+85°C
High Detection Sensitivity of Relative
Capacitive Changes: 5% – 100%
Detection Frequency up to 2kHz
Adjustable Voltage Range:
0...5/10V, other
Reference Voltage Source: 5V
Protection against Reverse Polarity
Output Current Limitation
Adjustable with only two Resistors
CAV414
GENERAL DESCRIPTION
The CAV414 is an universal multipurpose in-
terface for capacitive sensors and contains the
complete signal processing unit on chip. The
CAV414 detects the relative capacitive change
of a measuring capacity to a fixed reference
capacity. The IC is optimised for capacities in
the wide range of 10pF to 2nF with possible
changes of capacity of 5% to 100% of the ref-
erence capacity.
The voltage output is formed by a high accu-
racy instrumentation amplifier in combination
with an operational amplifier.
With only a few external components, the
CAV414 is suitable for a great variety of ap-
plications including a zero compensation.
APPLICATIONS
Industrial Process Control
Distance Measurement
Pressure Measurement
Humidity Measurement
Level Control
DELIVERY
DIL16 packages (samples)
SO16(n) packages
Dice on 5“ blue foil
BLOCK DIAGRAM
COSC
12
Reference
Oscillator
CAV414
IA
OP
VCC
9
CX1
16
Integrator 1
Integrator 2
Signal Conditioning
VOUT
8
7
10
CX2
14
GAIN
GND
Voltage/Current
Reference
15
13
4
5
6
2
3
1
11
VREF
CL1
Figure 1
CL2
RL LPOUT VM
RCX1 RCX2 RCOSC
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: http://www.analogmicro.de
Phone: +49 (0)6131/91 073 – 0
Fax:
+49 (0)6131/91 073 – 30
E–Mail: info@analogmicro.de
January 2001
1/6
Rev. 2.1
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