參數(shù)資料
型號: CAV424
廠商: Electronic Theatre Controls, Inc.
英文描述: Converter IC for Capacitive Signals
中文描述: 轉(zhuǎn)換器集成電路電容信號
文件頁數(shù): 1/7頁
文件大?。?/td> 74K
代理商: CAV424
Converter IC for Capacitive Signals
CAV424
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: http://www.analogmicro.de
January 2002
Phone: +49 (0)6131/91 073 – 0
Fax:
+49 (0)6131/91 073 – 30
E–mail:
info@analogmicro
.
de
1/7
Rev. 1.
3
FEATURES
Ratiometric Supply Voltage: 5V ± 5%
Wide Operating Temperature Range:
–40°C...+85°C
High Detection Sensitivity of Relative
Capacitive Changes: 5% – 100%
Detection Frequency up to 2kHz
Differential Output Signal with Great
Voltage Swing
Integrated Temperature Sensor
Adjustable with only two Resistors
APPLICATIONS
Industrial Process Control
Distance Measurement
Pressure Measurement
Humidity Measurement
Level Control
GENERAL DESCRIPTION
The CAV424 is an integrated C/V converter and
contains the complete signal processing unit for
capacitive signals on chip. The CAV424 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 reference capacity. The dif-
ferential voltage output signal can be directly
connected to a following A/D converter or an-
other signal conditioning IC from Analog Mi-
croelectronics. Using the integrated temperature
sensor, digital adjustable systems can be built
easily.
DELIVERY
DIL16 packages
SO16(n) packages
Dice put on 5“ blue foil
BLOCK DIAGRAM
CAV424
Signal Conditioning
VCC
GND
RCOSC
RCX
2
RCX
1
VM
LPOUT
RL
CL
2
CL
1
CX
2
CX
1
COSC
T
Sensor
Integrator 1
Integrator 2
Reference
Oscillator
VTEMP
1
3
11
6
5
4
2
7
12
16
14
13
15
10
Current Reference
Figure 1:
block diagram CAV424
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