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CS4121EDWF20 Datasheet(PDF) 7 Page - Cherry Semiconductor Corporation

Part # CS4121EDWF20
Description  Low Voltage Precision Air-Core Low Voltage Precision Air-Core
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Manufacturer  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS4121EDWF20 Datasheet(HTML) 7 Page - Cherry Semiconductor Corporation

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7
Speedometer/Odometer or Tachometer Application
R1 - 3.9, 500mW
R2 - 10k½
R3 - 3k½
R4 - 1k½
RT - Trim Resistor +/- 20 PPM/¡C 243k½
C1 - 0.1µF
C3 - 0.1µF
C4 - 0.47µF
CT - 0.0033µF, +/- 30 PPM/¡C
D1 - 1A, 600 PIV
D2 - 50V, 500mW Zener
Note 1: For 58% Speed Input
TMAX ² 5/fMAX where
TMAX = CT(R3+R4)
fMAX = maximum speed input frequency
Note 1: The product of CT and RT have a direct effect on
gain and therefore directly affect temperature compensation
Note 2: CT Range; 20pF to .2µF
Note 3: RT Range; 100k½ to 500k½
Note 4: The IC must be protected from transients above 60V and
reverse battery conditions
Note 5: Additional filtering on FREQIN lead may be required
1 CP+
2
3
4
5
6
7
8
SQOUT
FREQIN
Gnd
Gnd
COS+
COS-
VCC
16
15
14
13
12
11
10
9
CP-
F/VOUT
VREG
Gnd
Gnd
SINE+
SINE-
BIAS
CT
R3
C3
C1
D2
R1
D1
+
C4
RT
COSINE
SINE
Air Core
Gauge
200
W
Speedometer
Gnd
Battery
Speedo
Input
R2
R4
1
CS8441
C2
Air Core
Stepper Motor
200
W
Odometer
CP+
1 CP+
2
3
4
5
6
7
8
SQOUT
FREQIN
Gnd
Gnd
COS+
COS-
VCC
16
15
14
13
12
11
10
9
CP-
F/VOUT
VREG
Gnd
Gnd
SINE+
SINE-
BIAS
CT
R3
C3
C1
D2
R1
D1
+
C4
RT
COSINE
SINE
Air Core
Gauge
200
W
Speedometer
Gnd
Battery
Speedo
Input
R2
R4
CP+
Figure 6
Figure 7


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