TC9402EJD Просмотр технического описания (PDF) - TelCom Semiconductor Inc => Microchip
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TC9402EJD Datasheet PDF : 13 Pages
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VOLTAGE-TO-FREQUENCY/
FREQUENCY-TO-VOLTAGE CONVERTERS
V+ = 8V TO 15V (FIXED)
0.9
R1
GAIN
ADJUST
OFFSET
ADJUST
VIN
0V–10V
RIN
1MΩ
R2
5V
V2
2
14
6
8.2
0.01
kΩ
µF
2
kΩ
7
0.01 11
VREF
µF
0.2
R1
12
TC9400
5
820
pF
180
pF 3 IIN
IIN
1
4
100 kΩ
10kΩ
8
fOUT
10kΩ
10
fOUT/2
9
V+ R1
10V 1 MΩ
12V 1.4 MΩ
15V 2 MΩ
R2
10kΩ
14kΩ
20kΩ
1
fOUT = IIN × (V2–V7) (CREF)
IIN =
(VIN–V2) +
RIN
(V+–V2)
(0.9 R1+0.2 R1)
Figure 4 . Fixed Voltage — Single Supply Operation
1.2k*
+12 to +15V
R1
910k
R4
100k
R3
GAIN
R2
910k
100k
R5
91k
INPUT
VOLTAGE
(0 to 10V)
Rp
OFFSET
20k
1µF
D2
5.1VZ
D1
5.1VZ
14
VDD
11 THRESHOLD
CINT
DETECT
12 AMP OUT
CREF 5 CREF
0.1µ
100k
TC9400
3 IIN
fOUT 8
2 ZERO
ADJUST
6 GND
fOUT/2 10
7 VREF
1 IBIAS
OUTPUT 9
COMMON
VSS
4
ANALOG GROUND
COMPONENT SELECTION
F/S FREQ. CREF
CINT
1 kHz
2200pF 4700pF
10 kHz
180pF 470pF
100 kHz
27pF 75pF
10k 10k
OUTPUT
FREQUENCY
DIGITAL
GROUND
Figure 5. Voltage to Frequency
TELCOM SEMICONDUCTOR, INC.
1
TC9400
TC9401
TC9402
2
3
4
5
6
7
8
3-295
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