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參數(shù)資料
| 型號： | CAV414 |
| 廠商： | AME, 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)： | 4/6頁 |
| 文件大小： | 78K |
| 代理商： | CAV414 |
Converter IC for Capacitive Signals
CAV414
analog microelectronics
January 2001
4/6
BOUNDARY CONDITIONS
Parameter
Symbol
Min.
Typ.
Max.
Unit
Current Definition of Ref. Oscillator
R
COSC
190
200
210
k
Current Adjustment of Cap. Integrator 1
R
CX
1
350
400
450
k
Current Adjustment of Cap. Integrator 2
R
CX
2
350
400
450
k
Lowpass Stage Resistor Sum
R
L
1
+ R
L
2
90
200
k
Output Stage Resistor Sum
R
1
+ R
2
90
200
k
Reference Voltage 5V
C
REF
1.9
2.2
5
μ
F
Reference Voltage 2V (only for internal use)
C
VM
80
100
120
nF
Lowpass Capacitance 1
C
L
1
100
C
X
1
200
C
X
1
Lowpass Capacitance 2
C
L
2
100
C
X
1
200
C
X
1
Oscillator Capacitance
C
OSC
C
OSC
=1.55
C
X
1
C
OSC
=1.60
C
X
1
C
OSC
=1.65
C
X
1
Note:
The system performance over temperature forces that the resistors
R
CX
1
,
R
CX
2
and
R
OSC
have the same temperature
coefficient and a very close placement of them in the circuit. The capacities
C
X
1
,
C
X
2
and
C
OSC
are also forced to
have the same temperature coefficient and a very close placement of them in the circuit.
FUNCTIONAL DIAGRAM
CAV414
Reference
Oscillator
Integrator 1
Integrator 2
OP
Signal Conditioning
Voltage/Current
Reference
IA
12
16
14
15
13
4
5
6
3
1
7
8
9
10
VCC
OUT
GND
R
1
R
2
2
R
OSC
R
CX
2
R
CX
1
C
L
1
C
L
2
C
VM
R
L
1
R
L
2
C
OSC
C
X
1
C
X
2
V
LPOUT
V
M
V
DIFF
V
CX
1
V
CX
2
V
CX,DIFF
R
01
R
02
C
REF
11
Figure 2
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