TC9400
TC9401
TC9402
VOLTAGE-TO-FREQUENCY/FREQUENCY-TO-VOLTAGE CONVERTERS
FEATURES
Voltage-to-Frequency
s
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
1
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.
The devices can also be used as highly-accurate fre-
quency-to-voltage (F/V) converters, accepting virtually any
input frequency waveform and providing a linearly-propor-
tional voltage output.
A complete V/F or F/V system only requires the addition
of two capacitors, three resistors, and reference voltage.
2
3
4
5
6
7
s
s
s
s
s
Frequency-to-Voltage
s
s
Operation ........................................... DC to 100 kHz
Choice of Guaranteed Linearity:
TC9401 ......................................................... 0.02%
TC9400 ......................................................... 0.05%
TC9402 ......................................................... 0.25%
Programmable Scale Factor
ORDERING INFORMATION
Part No.
TC9400COD
TC9400CPD
TC9400EJD
TC9401CPD
TC9401EJD
TC9402CPD
TC9402EJD
Linearity
(V/F)
0.05%
0.05%
0.05%
0.01%
0.01%
0.25%
0.25%
Package
Temperature
Range
s
APPLICATIONS
s
s
s
s
s
s
s
µ
P Data Acquisition
13-Bit Analog-to-Digital Converters
Analog Data Transmission and Recording
Phase-Locked Loops
Frequency Meters/Tachometer
Motor Control
FM Demodulation
14-Pin
0°C to +70°C
SOIC (Narrow)
14-Pin
0°C to +70°C
Plastic DIP
14-Pin
– 40°C to +85°C
CerDIP
14-Pin
0°C to +70°C
Plastic DIP
14-Pin
– 40°C to +85°C
CerDIP
14-Pin
0°C to +70°C
Plastic DIP
14-Pin
– 40°C to +85°C
CerDIP
FUNCTIONAL BLOCK DIAGRAM
TC9400
Integrator
Capacitor
Input
Voltage
R
IN
I
IN
Pulse Output
Integrator
OpAmp
Threshold
Detector
One
Shot
Reference
Capacitor
÷2
Pulse/2 Output
I
REF
Reference
Voltage
TC9400/1/2-5 11/6/96
8
3-287
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
