Engineering
TC9400/9401/9402
Voltage-to-Frequency / Frequency-to-Voltage Converters
Features:
VOLTAGE-TO-FREQUENCY
• 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
General Description:
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. 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.
FREQUENCY-TO-VOLTAGE
• Operation: DC to 100 kHz • Choice of Linearity: - TC9401: 0.02% - TC9400: 0.05% - TC9402: 0.25% • Programmable Scale Factor
Package Type
14-Pin Plastic DIP/CERDIP
IBIAS 1 ZERO ADJ 2 IIN 3 VSS 4 14 VDD 13 NC
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
VREFOUT 5 GND 6 VREF 7
TC9400 TC9401 TC9402
12 AMPLIFIER OUT THRESHOLD 11 DETECTOR 10 FREQ/2 OUT 9 OUTPUT COMMON 8 PULSE FREQ OUT
14-Pin SOIC
IBIAS ZERO ADJ IIN VSS VREFOUT GND VREF 1 2 3 4 5 6 7 14 13 VDD NC AMPLIFIER OUT THRESHOLD DETECTOR FREQ/2 OUT OUTPUT COMMON PULSE FREQ OUT
TC9400 TC9401 TC9402
12 11 10 9 8
NC = No Internal Connection
© 2007 Microchip Technology Inc.
DS21483D-page 1
TC9400/9401/9402
Functional Block Diagram
Integrator Capacitor Input Voltage RIN IIN
Integrator Op Amp
Voltage-to-Frequency / Frequency-to-Voltage Converters
Features:
VOLTAGE-TO-FREQUENCY
• 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
General Description:
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. 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.
FREQUENCY-TO-VOLTAGE
• Operation: DC to 100 kHz • Choice of Linearity: - TC9401: 0.02% - TC9400: 0.05% - TC9402: 0.25% • Programmable Scale Factor
Package Type
14-Pin Plastic DIP/CERDIP
IBIAS 1 ZERO ADJ 2 IIN 3 VSS 4 14 VDD 13 NC
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
VREFOUT 5 GND 6 VREF 7
TC9400 TC9401 TC9402
12 AMPLIFIER OUT THRESHOLD 11 DETECTOR 10 FREQ/2 OUT 9 OUTPUT COMMON 8 PULSE FREQ OUT
14-Pin SOIC
IBIAS ZERO ADJ IIN VSS VREFOUT GND VREF 1 2 3 4 5 6 7 14 13 VDD NC AMPLIFIER OUT THRESHOLD DETECTOR FREQ/2 OUT OUTPUT COMMON PULSE FREQ OUT
TC9400 TC9401 TC9402
12 11 10 9 8
NC = No Internal Connection
© 2007 Microchip Technology Inc.
DS21483D-page 1
TC9400/9401/9402
Functional Block Diagram
Integrator Capacitor Input Voltage RIN IIN
Integrator Op Amp