KA331 Voltage-to-Frequency Converter IC
The KA331 voltage-to-frequency converter provides the output pulse train at a frequency precisely proportional to the applied input voltage. The KA331 can operate at power supplies as low as 4.0V and be changed the output frequency from 1Hz to 100KHz. It is ideally suited for use in simple low-cost circuits for analog-to-digital conversion, long-term integration, linear frequency modulation or demodulation, frequency-to-voltage conversion, and many other functions.
KA331 Pinout Configuration
|
Pin Number |
Pin Name |
Description |
|
1 |
Current Output |
Precision Current Output Pin |
|
2 |
Reference Current |
Reference Current Generated by Current Pump |
|
3 |
Frequency Output |
Frequency output Corresponding to Input Voltage |
|
4 |
GND |
Groud Pin |
|
5 |
RC |
Frequency Renge Set |
|
6 |
Threshold |
Set Input Voltage Threshold |
|
7 |
Comparator Input |
Voltage Input Pin |
|
8 |
VCC |
Power Supply Input Pin |
Features & Specifications
- Guaranteed linearity: 0.01% max.
- Low power dissipation: 15mW at 5V
- Wide range of full-scale frequency: 1Hz to 100KHz
- Pulse output compatible with all logic forms
- Wide dynamic range: 100dB min at 10KHz full-scale frequency
- Max Supply Voltage 40V
- Input Voltage -0.2 to +VCC (Supply Voltage)
Note: Complete technical details can be found in the KA331 datasheet given at the end of this page.
KA331 Equivalent IC
AD654, LM331
How to Use KA331 IC
The KA331 is a Voltage to frequency converter IC which means if you provide voltage in the input pin of the IC, the output frequency of the IC will vary according to the input voltage. The main distinguishing feature of the KA331 is that they have ultra-low distortion, and low-noise operation. The 8 pin DIP IC can work in a wide range of bandwidth from 1Hz to 100 kHz. It also has a wide range of supply voltage from 5V to 40V. KA331 is the equivalent of popular LM331 which can also be used in this F-to-V circuit.
A simple Schematic of the Voltage to frequency converter setup is shown above which is taken from the datasheet. With a little bit of modification, you can configure this IC as a Frequency to Voltage Converter Circuit.
Applications
- Voltage to Frequency Converter
- Analog to Digital Converter
- Fixed Frequency Oscillator
- Light Intensity to Frequency Converter
- Frequency to Voltage Converter
2D Model and Dimensions
If you are designing a PCB or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions.
