AD650JP

Overview

The AD650JP is a monolithic voltage-to-frequency and frequency-to-voltage converter manufactured by Analog Devices Inc. It operates in the commercial temperature range of 0°C to +70°C and is housed in a 20-lead plastic leaded chip carrier (PLCC) package. The device supports full-scale output frequencies up to 1 MHz with typical nonlinearity as low as 0.002% at 10 kHz. It features an open-collector frequency output compatible with TTL or CMOS logic, separate analog and digital ground pins, and user-programmable input ranges via external components.

Feature Summary

• Provides high-resolution analog-to-digital conversion through inherent monotonicity of the V/F transfer function.
• Supports flexible input configurations including unipolar, bipolar, differential voltages, and unipolar currents.
• Features separate analog and digital grounds to prevent ground loops in real-world applications.
• Offers MIL-STD-883 compliant versions for specialized reliability requirements.

Applications

• Isolated analog signal transmission
• Precision stepper motor speed controllers
• Phase-locked loop circuits
• Precision tachometer circuits
• FM demodulator circuits

Procurement Notes

Verify the specific suffix JP corresponds to the 20-lead PLCC package configuration. Confirm that the commercial temperature rating of 0°C to +70°C meets the operational environment requirements. Ensure that the open-collector output interface is compatible with the target logic family voltage levels. Check for availability of MIL-STD-883 compliant variants if military specifications are required.

Selection Notes

Select appropriate external resistors and capacitors to define the full-scale frequency and input voltage range. Consider using larger timing capacitor values to improve linearity performance. Implement proper decoupling capacitors on supply pins to maintain accuracy. Utilize the offset null pins to trim input offset voltage to zero for higher precision applications.

Part Context

The AD650 series includes various packages such as 14-lead DIP and ceramic options for industrial and extended temperature ranges. The JP variant specifically denotes the surface-mount PLCC package suitable for commercial applications. Other grades like K and B offer tighter linearity specifications compared to J and A grades.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.