Overview
The AD650KNZ, produced by Analog Devices Inc., is a high-performance voltage-to-frequency (V/F) and frequency-to-voltage (F/V) converter. This monolithic IC combines high frequency operation with low nonlinearity, making it highly suitable for various precision applications. The AD650KNZ is particularly useful in analog-to-digital conversion, isolated analog signal transmission, phased-locked loop circuits, and precision stepper motor speed controllers. Its flexible input configuration and separate analog and digital grounds enhance its versatility and reliability in real-world applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Full-Scale Frequency Range | 1 | 1 | 1 | MHz |
| Nonlinearity at 10 kHz | 0.002 | 0.005 | 0.005 | % |
| Nonlinearity at 100 kHz | 0.005 | 0.02 | 0.02 | % |
| Nonlinearity at 500 kHz | 0.02 | 0.05 | 0.05 | % |
| Nonlinearity at 1 MHz | 0.1 | 0.1 | % | |
| Full-Scale Calibration Error at 100 kHz | ±5 | ±5 | % | |
| Full-Scale Calibration Error at 1 MHz | ±10 | ±10 | % | |
| Temperature Coefficient at 10 kHz | ±75 | ±75 | ppm/°C | |
| Temperature Coefficient at 100 kHz | ±150 | ±200 | ppm/°C |
Key Features
- High frequency operation up to 1 MHz full scale.
- Low nonlinearity: typically 20 ppm (0.002% of full scale) and 50 ppm (0.005%) maximum at 10 kHz full scale.
- Flexible input configuration for various voltage and current formats.
- Open-collector output with separate digital ground for easy interfacing to logic families or opto-couplers.
- Separate analog and digital grounds to prevent ground loops.
- Available in versions compliant with MIL-STD-883.
- User-programmable input signal range and full-scale output frequency using external capacitors and a resistor.
Applications
- Analog-to-digital conversion with high resolution.
- Isolated analog signal transmission.
- Phased-locked loop circuits.
- Precision stepper motor speed controllers.
- Precision tachometer and FM demodulator circuits in F/V mode.
Q & A
- What is the primary function of the AD650KNZ?
The AD650KNZ is a voltage-to-frequency (V/F) and frequency-to-voltage (F/V) converter. - What is the maximum full-scale frequency of the AD650KNZ?
The maximum full-scale frequency is 1 MHz. - What is the typical nonlinearity at 10 kHz full scale?
The typical nonlinearity is 0.002% (20 ppm) of full scale. - Can the AD650KNZ be used in analog-to-digital conversion?
Yes, it is highly suitable for analog-to-digital conversion due to its high resolution and low nonlinearity. - What are the benefits of separate analog and digital grounds in the AD650KNZ?
Separate grounds prevent ground loops in real-world applications. - Is the AD650KNZ compliant with any military standards?
Yes, it is available in versions compliant with MIL-STD-883. - How can the input signal range and full-scale output frequency be adjusted?
These can be adjusted using two external capacitors and one resistor. - What are some common applications of the AD650KNZ?
Common applications include isolated analog signal transmission, phased-locked loop circuits, and precision stepper motor speed controllers. - Can the AD650KNZ be used in F/V mode?
Yes, it can be used in F/V mode for applications such as precision tachometers and FM demodulators. - What is the dynamic range of the AD650KNZ?
The AD650KNZ has a useful dynamic range of six decades.
