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FEATURES V/F Conversion to 1 MHz Reliable Monolithic Construction Very Low Nonlinearity 0.002% typ at 10 kHz 0.005% ty...
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FEATURES V/F Conversion to 1 MHz Reliable Monolithic Construction Very Low Nonlinearity 0.002% typ at 10 kHz 0.005% typ at 100 kHz 0.07% typ at 1 MHz Input Offset Trimmable to Zero
CMOS or TTL Compatible Unipolar, Bipolar, or Differential V/F V/F or F/V Conversion Available in Surface Mount MIL-STD-883 Compliant Versions Available
Voltage-to-Frequency and Frequency-to-
Voltage Converter AD650
PIN CONFIGURATION
PRODUCT DESCRIPTION
The AD650 V/F/V (
voltage-to-frequency or frequency-to-
voltage converter) provides a combination of high frequency operation and low nonlinearity previously unavailable in monolithic form. The inherent monotonicity of the V/F transfer function makes the AD650 useful as a high-resolution analog-to-digital converter. A flexible input configuration allows a wide variety of input
voltage and current formats to be used, and an open-collector output with separate digital ground allows simple interfacing to either standard logic families or opto-couplers. The linearity error of the AD650 is typically 20 ppm (0.002% of full scale) and 50 ppm (0.005%) maximum at 10 kHz full scale. This corresponds to approximately 14-bit linearity in an analog-to-digital converter circuit. Higher full-scale frequencies or longer count intervals can be used for higher resolution conversions. The AD650 has a useful dynamic range of six decades allowing extremely high resolution measurements. Even at 1 MHz full scale, linearity is guaranteed less than 1000 ppm (0.1%) on the A...