Overview
The AD650KN, produced by Analog Devices Inc., is a versatile voltage-to-frequency (V/F) and frequency-to-voltage (F/V) converter. This monolithic IC combines high frequency operation with low nonlinearity, making it suitable for a variety of applications, including high-resolution analog-to-digital conversion, isolated analog signal transmission, and precision control circuits. The AD650KN offers a dynamic range of six decades, enabling extremely high resolution measurements, and it can operate at full-scale output frequencies up to 1 MHz with guaranteed linearity.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Full-Scale Output Frequency | Up to 1 MHz | Hz |
| Linearity Error (Typical) | 20 ppm (0.002% of full scale) | - |
| Linearity Error (Maximum at 10 kHz full scale) | 50 ppm (0.005% of full scale) | - |
| Input Signal Range | Bipolar, Unipolar, or Differential Voltages; Unipolar Input Currents | - |
| Temperature Range | -55°C to +125°C (extended temperature range for AD650SD) | °C |
| Package Types | Plastic 14-lead DIP, 20-lead PLCC, Ceramic packages | - |
| Logic Compatibility | TTL or CMOS compatible | - |
Key Features
- High frequency operation up to 1 MHz with low nonlinearity.
- Flexible input configuration for bipolar, unipolar, or differential input voltages, or unipolar input currents.
- TTL or CMOS compatibility with an open-collector frequency output.
- Separate analog and digital grounds to prevent ground loops.
- User-programmable input signal range and full-scale output frequency using external capacitors and a resistor.
- Input offset voltage can be trimmed to zero with an external potentiometer.
- Available in versions compliant with MIL-STD-883.
Applications
- High-resolution analog-to-digital conversion.
- Isolated analog signal transmission.
- Precision stepper motor speed controllers.
- Precision tachometer and FM demodulator circuits in F/V mode.
- Phased-locked loop circuits.
Q & A
- What is the maximum full-scale output frequency of the AD650KN?
The AD650KN can operate at full-scale output frequencies up to 1 MHz.
- What is the typical linearity error of the AD650KN?
The typical linearity error is 20 ppm (0.002% of full scale).
- Can the AD650KN handle bipolar input voltages?
Yes, the AD650KN can be configured to accommodate bipolar, unipolar, or differential input voltages, as well as unipolar input currents.
- Is the AD650KN compatible with TTL or CMOS logic?
Yes, the AD650KN is TTL or CMOS compatible using an open-collector frequency output.
- How can the input offset voltage be adjusted?
The input offset voltage can be trimmed to zero with an external potentiometer.
- What are the available package types for the AD650KN?
The AD650KN is available in plastic 14-lead DIP, 20-lead PLCC, and ceramic packages.
- What is the temperature range for the AD650KN?
The temperature range varies by package, with the AD650SD specified for the full -55°C to +125°C extended temperature range.
- Can the AD650KN be used for F/V conversion?
Yes, the AD650KN can be used for F/V conversion by adding a simple logic biasing network and reconfiguring the IC.
- What are some common applications of the AD650KN?
Common applications include high-resolution analog-to-digital conversion, isolated analog signal transmission, and precision stepper motor speed controllers.
- Is the AD650KN compliant with any military standards?
Yes, the AD650KN is available in versions compliant with MIL-STD-883.
