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 100kHz (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
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
proportional voltage output.
A complete V/F or F/V system only requires the addi-
tion of two capacitors, three resistors, and reference
voltage.
FREQUENCY-TO-VOLTAGE
• Operation: DC to 100kHz
• Choice of Linearity
- TC9401: 0.02%
- TC9400: 0.05%
- TC9402: 0.25%
• Programmable Scale Factor
Package Type
14-Pin Plastic DIP/CERDIP
I
BIAS
1
ZERO ADJ 2
I
IN
3
V
SS
4
V
REF
OUT 5
GND 6
V
REF
7
14 V
DD
13 NC
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
TC9400
TC9401
TC9402
12 AMPLIFIER OUT
THRESHOLD
11 DETECTOR
10 FREQ/2 OUT
9 OUTPUT COMMON
8 PULSE FREQ OUT
14-Pin SOIC
I
BIAS
ZERO ADJ
1
2
3
4
5
6
7
14
13
V
DD
NC
AMPLIFIER OUT
THRESHOLD
DETECTOR
FREQ/2 OUT
OUTPUT COMMON
PULSE FREQ OUT
Device Selection Table
Part
Number
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
14-Pin SOIC
(Narrow)
14-Pin PDIP
14-Pin CerDIP
14-Pin PDIP
14-Pin CerDIP
14-Pin PDIP
14-Pin CerDIP
Temperature
Range
0°C to +70°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
°C to +85°C
I
IN
V
SS
V
REF
OUT
GND
V
REF
TC9400
TC9401
TC9402
12
11
10
9
8
NC = No Internal Connection
2002 Microchip Technology Inc.
DS21483B-page 1
©
MICROCHIP [ MICROCHIP TECHNOLOGY ]
