CS4121 Datasheet, PDF (10/12 Pages) Cherry Semiconductor Corporation – Low Voltage Precision Air-Core Low Voltage Precision Air-Core

CS4121
R3
Speedo
Input
R2
10 kW
3.0 kW
C_CP
0.0033 mF
± 30 PPM/°C
C3 0.1 mF
Battery
R1
D1 ^3.9,
1.0 A 500 mW
600 PIV
D2
50 V,
500 mW
Zener
GND
C1
0.1 mF
R4
1.0 kW
1 CP+
CP−
SQ_OUT ^F/VOUT
FREQ_IN VREG
GND
GND
GND
GND
COS+ ^SINE+
COS− SINE−
V_CC
BIAS
C4 0.47 mF
+
COSINE
SINE
Air Core
Gauge
200 W
Speedometer
Trim Resistor
R_{T ± 20 PPM/°C}
243 kW
C2
1
CS8441
Notes:
Air Core
Stepper
Motor
200 W
Odometer
1. The product of C4 and R_T have a direct effect on gain and therefore directly affect temperature compensation.
2. C_CP Range; 20 pF to 0.2 mF.
3. R_T Range; 100 kW to 500 kW.
4. The Ic must be protected from transients above 60 V and reverse battery conditions.
5. Additional filtering on FREQ_IN lead may be required.
6. Gauge coil connections to the IC must be kept as short as possible (≤ 3.0 inch) for best pointer stability.
Figure 10. Speedometer With Odometer or Tachometer Application
http://onsemi.com
10