Overview
The VFC320, although the specific model VFC32KUG4 is obsolete, is a monolithic voltage-to-frequency and frequency-to-voltage converter produced by Texas Instruments. This device provides a simple and cost-effective method for converting analog signals into digital pulses and vice versa. It is known for its high linearity, wide dynamic range, and compatibility with TTL and CMOS logic families. The VFC320 is available in various packages and performance grades, making it versatile for different applications.
Key Specifications
| Parameter | Conditions | Min | Max | Units | |
|---|---|---|---|---|---|
| V/F Converter Full Scale Frequency | fOUT = VIN/7.5 R1C1 | - | - | - | Hz |
| Input Voltage Range | - | -10 | - | 10 | V |
| Input Current Range | - | 0.25 | - | 0.75 | mA |
| Bias Current Inverting Input | - | 4 | 8 | - | nA |
| Offset Voltage | - | - | ±0.15 | - | mV |
| Logic '1' Output Voltage | - | - | +VCC | - | V |
| Logic '0' Output Voltage | - | -VCC | -0.05 | - | V |
| Pulse-width Range | - | - | 0.25 | - | µs |
| Power Supply Rated Voltage | - | ±13 | - | ±20 | V |
| Quiescent Current | - | ±6.5 | - | ±7.5 | mA |
| Operating Temperature Range | - | -40 | - | 85 | °C |
Key Features
- High linearity: Up to 12- to 14-bit resolution with linearity errors as low as ±0.005% at 10kHz full scale frequency.
- Wide dynamic range: 6-decade dynamic range for versatile application needs.
- TTL/CMOS compatible output: Ensures compatibility with a wide range of digital logic families.
- Low gain drift: Maximum gain drift of 20ppm/°C.
- Simple external component requirements: Only two external resistors and two external capacitors are needed for operation.
- Temperature stability: Specified for operation over a temperature range of –25°C to +85°C for B and C grades, and –55°C to +125°C for S grade).
Applications
- Inexpensive A/D and D/A converters: Ideal for applications requiring high resolution up to 14 bits).
- Digital panel meters: High accuracy and linearity make it suitable for precise measurement applications).
- Two-wire digital transmission with noise immunity: Excellent for transferring analog data over long lines in noisy environments).
- FM modulation/demodulation of transducer signals: Useful in signal processing and conditioning applications).
- Precision long-term integrator: Suitable for applications requiring high accuracy over extended periods).
- High-resolution optical link for isolation: Ideal for applications requiring isolation and high resolution).
- AC line frequency monitor and motor speed monitor and control: Versatile in monitoring and controlling various types of signals).
Q & A
- What is the primary function of the VFC320?
The VFC320 is a monolithic voltage-to-frequency and frequency-to-voltage converter, converting analog signals into digital pulses and vice versa).
- What is the linearity error of the VFC320 at 10kHz full scale frequency?
The linearity error is as low as ±0.005% at 10kHz full scale frequency).
- What is the dynamic range of the VFC320?
The VFC320 has a 6-decade dynamic range).
- What type of output does the VFC320 provide?
The output is TTL/CMOS compatible).
- How many external components are required to operate the VFC320?
Only two external resistors and two external capacitors are needed).
- What is the operating temperature range for the VFC320?
The operating temperature range is –25°C to +85°C for B and C grades, and –55°C to +125°C for S grade).
- Can the VFC320 be used for A/D and D/A conversions?
Yes, it is ideal for inexpensive A/D and D/A converters with high resolution up to 14 bits).
- How does the VFC320 handle noise in digital transmission?
The VFC320 provides high noise immunity in two-wire digital transmission applications).
- What types of signals can the VFC320 modulate/demodulate?
The VFC320 can modulate/demodulate FM signals from transducers).
- Is the VFC320 suitable for precision long-term integration?
Yes, it is suitable for precision long-term integration applications).
