TC9400/9401/9402
Voltage-to-Frequency / Frequency-to-Voltage Converters
Features:
General Description:
VOLTAGE-TO-FREQUENCY
The TC9400/9401/9402 are low-cost Voltage-to-Frequency (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.
• Choice of Linearity:
- TC9401: 0.01%
- TC9400: 0.05%
- TC9402: 0.25%
• DC to 100 kHz (F/V) or 1 Hz to 100 kHz (V/F)
• Low Power Dissipation: 27 mW (Typ.)
• Single/Dual Supply Operation:
- +8V to +15V or ±4V to ±7.5V
• Gain Temperature Stability: ±25 ppm/°C (Typ.)
• Programmable Scale Factor
FREQUENCY-TO-VOLTAGE
• Operation: DC to 100 kHz
• Choice of Linearity:
- TC9401: 0.02%
- TC9400: 0.05%
- TC9402: 0.25%
• Programmable Scale Factor
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 reference voltage.
Package Type
14-Pin Plastic DIP/CERDIP
IBIAS 1
14 VDD
ZERO ADJ 2
13 NC
IIN 3
TC9400
TC9401
TC9402
VSS 4
Applications:
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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
VREFOUT 5
12 AMPLIFIER OUT
THRESHOLD
11 DETECTOR
10 FREQ/2 OUT
GND 6
9 OUTPUT COMMON
VREF 7
8 PULSE FREQ OUT
14-Pin SOIC
IBIAS
1
14
VDD
ZERO ADJ
2
13
NC
IIN
3
12
AMPLIFIER OUT
VSS
4
11
THRESHOLD
DETECTOR
VREFOUT
5
10
FREQ/2 OUT
GND
6
9
OUTPUT COMMON
VREF
7
8
PULSE FREQ OUT
TC9400
TC9401
TC9402
NC = No Internal Connection
© 2007 Microchip Technology Inc.
DS21483D-page 1
