CAV424 Datasheet, PDF (2/7 Pages) List of Unclassifed Manufacturers – Converter IC for Capacitive Signals

Converter IC for Capacitive Signals
CAV424
ELECTRICAL SPECIFICATIONS
T_amb = 25°C, V_CC = 5V (unless otherwise noted)
Parameter
Symbol
Conditions
Min.
Supply
Supply Voltage
Maximum Supply Voltage
Quiescent Current
VCC
ratiometric range
4.75
VCCmax
ICC
Tamb = –40 ... 85°C, GLP = 1
0.6
Temperature Specifications
Operating
Storage
Junction
Thermal Resistance
Tamb
–40
Tst
–55
Tj
Θja
DIL16 plastic package
Θja
SO16 (n) plastic package
Reference Oscillator
Oscillator Capacitor Range
COSC
COSC = 1.6 ⋅ CX1
14
Oscillator Frequency Range
fOSC
1
Oscillator Current
IOSC
ROSC = 250kΩ
9.5
Capacitive Integrator 1 and 2
Capacitor Range 1
CX1
10
Capacitive Integrator Current 1
IX1
RCX1 = 500kΩ
4.75
Capacitor Detection Sensitivity
∆ CX
∆ CX = (CX2 − CX1 )/CX1
5
Capacitor Range 2
CX2
CX2 = CX1 ⋅ (1 + ∆ CX )
10.5
Capacitive Integrator Current 2
IX2
RCX2 = 500kΩ
4.75
Detection Frequency
fDET
CL1 = CL2 =1nF
Lowpass
Adjustable Gain
GLP
1
Output Voltage
VLPOUT
1.1
Corner Frequency 1
fC1
R01 = 20kΩ, CL1 =1nF
Corner Frequency 2
fC2
R02 = 20kΩ, CL2 =1nF
Resistive Load at PIN LPOUT
RLOAD
200
Capacitive Load at PIN LPOUT
Temperature Coefficient VDIFF (together
with Input Stages)
Internal Resistor 1 and 2
CLOAD
dVDIFF /dT
R01, R02
VDIFF = VLPOUT - VM ,
Tamb = –40 ... 85°C
Temperature Coefficient R01,02
dR01,02 /dT
Tamb = –40 ... 85°C
Ratiometric Error of VLPOUT
RAT@VDIFF*
* RAT @ VDIFF = 2 [1.05 VDIFF(VCC = 5V) – VDIFF(VCC = 5.25V)]/[VDIFF(VCC = 5V) + VDIFF(VCC = 5.25V)]
Typ.
Max.
Unit
5.00
5.25
V
17
V
1.0
1.4
mA
85
°C
125
°C
150
°C
70
°C/W
140
°C/W
1800
pF
130
kHz
10
10.75
µA
1000
pF
5
5.38
µA
100
%
2000
pF
5
5.38
µA
2
kHz
±100
20
1.9
0.11
10
VCC – 1.1
8
8
50
V
kHz
kHz
kΩ
pF
ppm/°C
kΩ
10^-3/°C
%FS
analog microelectronics
January 2002
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