Overview
The AD650AD, manufactured 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 suitable for a variety of applications including analog-to-digital conversion, isolated analog signal transmission, and precision stepper motor speed control. The AD650AD is available in a 14-lead ceramic DIP package and is specified for the industrial temperature range of −25°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Full-Scale Output Frequency | Up to 1 MHz |
| Linearity Error | Typically 20 ppm (0.002% of full scale), Maximum 50 ppm (0.005%) at 10 kHz full scale |
| Input Configuration | Bipolar, Unipolar, or Differential Input Voltages, or Unipolar Input Currents |
| Output Type | Open-Collector Frequency Output |
| Pull-Up Resistor Voltage | Up to 30 V |
| Temperature Range | −25°C to +85°C (Industrial) |
| Package Type | 14-lead Ceramic DIP |
| Grounding | Separate Analog and Digital Grounds |
Key Features
- High frequency operation up to 1 MHz with very high linearity.
- Flexible input configuration to accommodate bipolar, unipolar, or differential input voltages, or unipolar input currents.
- TTL or CMOS compatibility achieved through an open-collector frequency output.
- Same components can be used for both V/F and F/V conversion with a simple logic biasing network.
- Separate analog and digital grounds to prevent ground loops.
- Available in versions compliant with MIL-STD-883.
Applications
- Analog-to-digital conversion.
- 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 full-scale output frequency of the AD650AD?
The full-scale output frequency of the AD650AD can be up to 1 MHz. - What is the linearity error of the AD650AD?
The linearity error is typically 20 ppm (0.002% of full scale) and a maximum of 50 ppm (0.005%) at 10 kHz full scale. - What types of input configurations are supported by the AD650AD?
The AD650AD supports bipolar, unipolar, or differential input voltages, or unipolar input currents. - What is the output type of the AD650AD?
The output is an open-collector frequency output. - What is the maximum pull-up resistor voltage for the AD650AD?
The pull-up resistor can be connected to voltages up to 30 V. - What is the temperature range for the AD650AD?
The AD650AD is specified for the industrial temperature range of −25°C to +85°C. - What package type is the AD650AD available in?
The AD650AD is available in a 14-lead ceramic DIP package. - Does the AD650AD have separate grounds for analog and digital signals?
Yes, the AD650AD has separate analog and digital grounds to prevent ground loops. - Is the AD650AD compliant with any military standards?
Yes, the AD650AD is available in versions compliant with MIL-STD-883. - Can the AD650AD be used for both V/F and F/V conversions?
Yes, the same components can be used for both V/F and F/V conversions by adding a simple logic biasing network.
