GENERAL DESCRIPTION
The TC9400/TC9401/TC9402 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.

FEATURES
Voltage-to-Frequency
■ Choice of Guaranteed Linearity:
TC9401 ......................................................... 0.01%
TC9400 ......................................................... 0.05%
TC9402 ......................................................... 0.25%
■ DC to 100 kHz (F/V) or 1Hz to 100kHz (V/F)
■ Low Power Dissipation .......................... 27mW 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 Guaranteed Linearity:
TC9401 ......................................................... 0.02%
TC9400 ......................................................... 0.05%
TC9402 ......................................................... 0.25%
■ Programmable Scale Factor

APPLICATIONS
■ µP Data Acquisition
■ 13-Bit Analog-to-Digital Converters
■ Analog Data Transmission and Recording
■ Phase-Locked Loops
■ Frequency Meters/Tachometer
■ Motor Control
■ FM Demodulation