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Analog Microelectronics

CAV414 Datasheet Preview

CAV414 Datasheet

Converter IC

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Converter IC for Capacitive Signals CAV414
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
BLOCK DIAGRAM
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
www.DataSheeCt4UO.cSoCm
12
CX1
16
CX2
14
Reference
Oscillator
Integrator 1
Integrator 2
Signal Conditioning
CAV414 VCC
9
IA VOUT
OP 8
GAIN
7
Voltage/Current
Reference
GND
10
VREF
11
Figure 1
15
CL1
13 4 5 6
2
3
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




Analog Microelectronics

CAV414 Datasheet Preview

CAV414 Datasheet

Converter IC

No Preview Available !

Converter IC for Capacitive Signals CAV414
ELECTRICAL SPECIFICATIONS
Tamb = 25°C, VCC = 24V, IREF = 1mA (unless otherwise noted)
Parameter
Symbol
Conditions
Supply
Supply Voltage
Quiescent Current
Temperature Specifications
Operating
Storage
Junction
Thermal Resistance
Reference Oscillator
Oscillator Capacitor Range
Oscillator Frequency Range
Oscillator Current
Capacitive Integrator 1 and 2
Capacitor Range 1
Capacitive Integrator Current 1
Capacitor Detection Sensitivity
Capacitor Range 2
Capacitive Integrator Current 2
Detection Frequency
Lowpass
Adjustable Gain
Output Voltage
Corner Frequency 1
www.DataCSohrneeertF4rUeq.cuoemncy 2
Resistive Load at PIN LPOUT
Capacitive Load at PIN LPOUT
Temperature Coefficient VDIFF (together
with Input Stages)
Internal Resistor 1 and 2
Temperature Coefficient R01,02
Power Supply Rejection Ratio
(together with Input Stages)
Voltage Reference VREF
Voltage
Current
VREF vs. Temperature
Line Regulation
Load Regulation
Load Capacitance
VCC
ICC
Tamb
Tst
Tj
Θja
Θja
COSC
fOSC
IOSC
CX1
IX1
CX
CX2
IX2
fDET
GLP
VLPOUT
fC1
fC2
RLOAD
CLOAD
dVDIFF /dT
R01, R02
dR01,02 /dT
PSRR
VREF
IREF
dVREF /dT
dVREF /dV
dVREF / dV
dVREF /dI
dVREF /dI
CREF
Tamb = –40 ... 85°C, IREF = 0mA
DIL16 plastic package
SO16 (n) plastic package
COSC = 1.6 CX1
ROSC = 200k
RCX1 = 400k
CX = (CX2 CX1 )/CX1
CX2 = CX1 (1 + CX )
RCX2 = 400k
CL1 = CL2 =1nF
R01 = 20k, CL1 =1nF
R02 = 20k, CL2 =1nF
VDIFF = VLPOUT - VM ,
Tamb = –40 ... 85°C
Tamb = –40 ... 85°C
IOUT 1mA
Tamb = –40...+85°C
Vcc = 6V...35V
Vcc = 6V...35V, IREF 4mA
IREF 4mA
Min.
6
–40
–55
14
1
9.5
10
4.75
5
10.5
4.75
1
VM –0.4
200
80
4.75
0
1.9
Typ.
1.55
70
140
10
5
5
±100
20
1.9
90
5
±90
30
60
0.05
0.06
2.2
Max.
Unit
35 V
2.7 mA
85 °C
125 °C
150 °C
°C/W
°C/W
1800
130
10.75
pF
kHz
µA
1000
5.38
100
2000
5.38
2
pF
µA
%
pF
µA
kHz
10
VM +0.4
10
10
50
V
kHz
kHz
k
pF
ppm/°C
k
10-3/°C
dB
5.25
9
±140
80
150
0.10
0.15
5.0
V
mA
ppm/°C
ppm/V
ppm/V
%/mA
%/mA
µF
analog microelectronics
January 2001
2/6


Part Number CAV414
Description Converter IC
Maker Analog Microelectronics
Total Page 6 Pages
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