Overview
The AD650SD/883B is a high-accuracy, military-grade voltage-to-frequency (V/F) and frequency-to-voltage (F/V) converter produced by Analog Devices Inc. This device combines high frequency operation with low nonlinearity, making it suitable for a variety of precision applications. The AD650SD/883B is particularly useful in scenarios requiring high-resolution analog-to-digital conversion, isolated analog signal transmission, and precision control circuits.
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 (A, B, and S Grades at 10 kHz) | ±75 | ±75 | ppm/°C | |
| Temperature Coefficient (A, B, and S Grades 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) at 10 kHz.
- Flexible input configuration supporting 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.
- Compliant with MIL-STD-883 for military-grade reliability.
- User-programmable input signal range and full-scale output frequency using external capacitors and a resistor.
Applications
- High-resolution analog-to-digital conversion.
- Isolated analog signal transmission.
- Precision stepper motor speed controllers.
- Phased-locked loop circuits.
- Precision tachometer and FM demodulator circuits in F/V mode.
Q & A
- What is the full-scale frequency range of the AD650SD/883B? The full-scale frequency range is up to 1 MHz.
- What is the typical nonlinearity at 10 kHz for the AD650SD/883B? The typical nonlinearity is 0.002% (20 ppm) of full scale.
- Is the AD650SD/883B compliant with any military standards? Yes, it is compliant with MIL-STD-883.
- How can the input signal range and full-scale output frequency be adjusted? They can be adjusted using two external capacitors and one resistor.
- What are some common applications of the AD650SD/883B? Common applications include high-resolution analog-to-digital conversion, isolated analog signal transmission, and precision stepper motor speed controllers.
- Does the AD650SD/883B have separate grounds for analog and digital signals? Yes, it has separate analog and digital grounds to prevent ground loops.
- What is the temperature coefficient for the AD650SD/883B at 10 kHz? The temperature coefficient is typically ±75 ppm/°C for A, B, and S grades.
- Can the AD650SD/883B be used in F/V conversion mode? Yes, it can be used in F/V conversion mode with a simple logic biasing network and reconfiguration.
- What is the full-scale calibration error at 1 MHz for the AD650SD/883B? The full-scale calibration error at 1 MHz is ±10%.
- How does the AD650SD/883B ensure high resolution in measurements? It has a useful dynamic range of six decades, allowing for extremely high resolution measurements.
