AD650 is a high precision voltage/frequency converter manufactured by Analog Devices. The converter has a 1 MHz conversion frequency and can achieve very low nonlinearity in a single monolithic IC. The AD650's input can be a single-ended, differential or bipolar voltage or current, and the output can be a frequency or voltage. AD650 meets the MIL-STD-883 standard.
The AD650 is a voltage‑to‑frequency (V/F) and frequency‑to‑voltage (F/V) converter that offers up to 1 MHz full‑scale output frequency with very low nonlinearity. It can be configured for unipolar, bipolar, or differential inputs and provides separate analog and digital grounds to minimize ground‑loop noise.
The document includes detailed specifications, absolute maximum ratings, pin assignments, ordering information, and circuit examples for unipolar, bipolar, and negative‑input configurations, as well as guidelines for high‑frequency operation and proper decoupling and grounding practices.
| Typical Nonlinearity (10 kHz) | 0.002 % |
|---|---|
| Industrial Temperature Range | -25 °C to +85 °C |
| Extended Temperature Range | -55 °C to +125 °C |
Typical nonlinearity is 0.002 % at 10 kHz.
The AD650 is offered in plastic 14‑lead DIP (AD650JN, AD650KN), 20‑lead PLCC (AD650JP), ceramic DIP for industrial grades (AD650AD, AD650BD), and an extended‑temperature ceramic version (AD650SD).