TC9400_06 Datasheet, PDF (12/24 Pages) Microchip Technology – Voltage-to-Frequency/Frequency-to-Voltage Converters

TC9400/9401/9402
R₁
910k
R₄
100k
R₃
Gain
1 μF
D₂
5.1 VZ
R₂
910k
100k
R₅
91k
D₁
5.1 VZ
Input
Voltage
(0 to 10V)
Rp
Offset
20k
Analog Ground
Component Selection
F/S FREQ. CREF
C_INT
1 kHz
2200 pF 4700 pF
10 kHz
180 pF 470 pF
100 kHz
27 pF 75 pF
+12 to +15V
1.2k
14
V_DD
C_INT
11 ^Threshold
Detect
12 _{Amp Out}
C_{REF 5 CREF}
TC9400
3 I_IN
2 ^{Zero Adjust}
F_OUT ⁸
6 _GND
F_OUT/2 ¹⁰
0.1μ
100k
7 _VREF
1 _IBIAS
Output 9
Common
V_SS
4
FIGURE 5-2:
Voltage-to-Frequency
10k 10k
Output
Frequency
Digital
Ground
DS21483C-page 12
© 2006 Microchip Technology Inc.