BUY AD650SD https://www.utsource.net/itm/p/1145688.html
Voltage-to-Frequency and Frequency-to-Voltage Converter
Description: The AD650SD is a low power, precision, monolithic, voltage-to-frequency converter. Features: Low Supply Current: 1.2 mA Low Input Offset Voltage: 0.5 mV Low Input Bias Current: 0.1 nA Low Input Offset Current: 0.1 nA Low Output Frequency Drift: 0.1 Hz/°C Low Output Frequency Error: 0.1% Wide Input Voltage Range: ±15 V Wide Output Frequency Range: 0.1 Hz to 10 kHz Wide Temperature Range: 40°C to +85°C High Linearity: 0.1% Low Output Impedance: 10 Ω Low Output Voltage: 0.5 V Applications: Frequency-to-Voltage Conversion Frequency-to-Current Conversion Frequency-to-Resistance Conversion Frequency-to-Temperature Conversion Frequency-to-Pressure Conversion Frequency-to-Humidity Conversion Frequency-to-Light Intensity Conversion Frequency-to-Position Conversion Frequency-to-Velocity Conversion Frequency-to-Acceleration Conversion Frequency-to-Force Conversion (For reference only)