?2007 Microchip Technology Inc.
DS21483D-page 1
TC9400/9401/9402
Features:
VOLTAGE-TO-FREQUENCY
" Choice of Linearity:
- TC9401: 0.01%
- TC9400: 0.05%
- TC9402: 0.25%
" DC to 100kHz (F/V) or 1Hz to 100kHz (V/F)
" Low Power Dissipation: 27mW (Typ.)
" Single/Dual Supply Operation:
- +8V to +15V or ?V to ?.5V
" Gain Temperature Stability: ?5ppm/癈 (Typ.)
" Programmable Scale Factor
FREQUENCY-TO-VOLTAGE
" Operation: DC to 100kHz
" Choice of Linearity:
- TC9401: 0.02%
- TC9400: 0.05%
- TC9402: 0.25%
" Programmable Scale Factor
Applications:
" Microprocessor Data Acquisition
" 13-bit Analog-to-Digital Converters (ADC)
" Analog Data Transmission and Recording
" Phase Locked Loops
" Frequency Meters/Tachometer
" Motor Control
" FM Demodulation
General Description:
The TC9400/9401/9402 are low-cost Voltage-to-Fre-
quency (V/F) converters, utilizing low-power CMOS
technology. The converters accept a variable analog
input signal and generate an output pulse train, whose
frequency is linearly proportional to the input voltage.
The devices can also be used as highly accurate
Frequency-to-Voltage (F/V) converters, accepting
virtually any input frequency waveform and providing a
linearly proportional voltage output.
A complete V/F or F/V system only requires the
addition of two capacitors, three resistors, and refer-
ence voltage.
Package Type
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
DD
NC
AMPLIFIER OUT
THRESHOLD
DETECTOR
FREQ/2 OUT
OUTPUT COMMON
PULSE FREQ OUT
I
BIAS
ZERO ADJ
I
IN
V
SS
V
REF
OUT
GND
V
REF
1
2
3
4
5
6
7
14
13
12
11
10
9
8
TC9400
TC9401
TC9402
14-Pin Plastic DIP/CERDIP
14-Pin SOIC
TC9400
TC9401
TC9402
NC = No Internal Connection
V
DD
NC
AMPLIFIER OUT
THRESHOLD
DETECTOR
FREQ/2 OUT
OUTPUT COMMON
PULSE FREQ OUT
I
BIAS
ZERO ADJ
I
IN
V
SS
V
REF
OUT
GND
V
REF
Voltage-to-Frequency / Frequency-to-Voltage Converters
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