CS4101 Datasheet, PDF (7/8 Pages) Cherry Semiconductor Corporation – Precision Air-Core Tach/Speedo Driver with Separate Function Generator Input

Speedometer/Odometer or Tachometer Application
Speedo
Input
R3
R4
1 CP+
CP- 20
C_T
2 SQOUT F/VOUT 19
C4+
R_T
R2
C3
3 FREQ_IN
4 BIAS
V_REG 18
NC 17
5 Gnd
Gnd 16
6 Gnd
Gnd 15
7 NC
NC 14
8 COS+
SIN+ 13
Battery
D1 R1
D2 C1 C2
9 COS-
10 V_CC
SINE- 12
F_GEN 11
COSINE
SINE
Figure 6
R1 - 3.9, 500mW
R2 - 10k½
R3 - 3k½
R4 - 1k½
R_T - Trim Resistor +/- 20 PPM/DEG. C
C1 - 0.1µF
C2 - 1. Stand alone Speedo or Tach "0" µF
2. Stand alone Speedo or Tach with return to Zero, 2000µF
3. With CS-8441 application, 10µF
C3 - 0.1µF
Air Core
Gauge
200W
Speedometer
C4 - 0.47µF
C_T - 0.0033µF, +/- 30 PPM/¡C
D1 - 1A, 600 PIV
D2 - 50V, 500mW Zener
Note 1: For 58% Speed Input T_MAX ² 5/f_MAX where
T_MAX = C_T(R3+R4)
f_MAX = maximum speed input frequency
Speedo
Input
R2
R3
R4
C_T
C3
Battery
D1 R1
D2 C1
1 CP+
CP- 20
2 SQOUT
3 FREQ_IN
4 BIAS
5 Gnd
6 Gnd
7 NC
F/V_OUT 19
V_REG 18
NC 17
Gnd 16
Gnd 15
NC 14
8 COS+
SIN+ 13
9 COS-
SINE- 12
10 V_CC
F_GEN 11
C4+
R_T
COSINE
SINE
Air Core
Gauge
200W
Speedometer
C2
1
CS8441
Figure 7
Note 1: The product of C_T and R_T have a direct effect on
gain and therefore directly effect temperature
compensation
Note 2: C4 Range; 20pF to .2µF
Note 3: R4 Range; 100k½ to 500k½
Air Core
Stepper Motor
200W
Odometer
Note 4: The IC must be protected from transients above
60V and reverse battery conditions
Note 5: Additional filtering on the FREQ_IN lead may be
required
7