CAV414 datasheet(1/6 Pages) AME

Il numero della parte	CAV414

Spiegazioni elettronici	Converter IC for Capacitive Signals

PDF	6 Pages

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Produttore elettronici	AME [Analog Microelectronics]

Homepage	http://www.ame.com.tw/

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Converter IC for Capacitive Signals

CAV414

analog microelectronics

January 2001

Analog Microelectronics GmbH

Phone:

+49 (0)6131/91 073 – 0

1/6

An der Fahrt 13, D – 55124 Mainz

Fax:

+49 (0)6131/91 073 – 30

Rev. 2.1

Internet: http://www.analogmicro.de

E–Mail:

info@analogmicro.de

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

APPLICATIONS

• Industrial Process Control

• Distance Measurement

• Pressure Measurement

• Humidity Measurement

• Level Control

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.

DELIVERY

• DIL16 packages (samples)

• SO16(n) packages

• Dice on 5“ blue foil

BLOCK DIAGRAM

CAV414

Integrator 1

Integrator 2

Voltage/Current

Reference

IA

12

16

14

15

13

4

5

6

3

1

11

7

9

10

VCC

GAIN

2

OP

8

VOUT

GND

VREF

RCOSC

RCX2

RCX1

VM

LPOUT

RL

CL2

CL1

CX2

CX1

COSC

Reference

Oscillator

Signal Conditioning

Figure 1

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