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AD652

Analog Devices
Part Number AD652
Manufacturer Analog Devices
Description Monolithic Synchronous Voltage-to-Frequency Converter
Published May 25, 2023
Detailed Description Monolithic Synchronous Voltage-to-Frequency Converter AD652 FEATURES Full-scale frequency (up to 2 MHz) set by external...
Datasheet PDF File AD652 PDF File

AD652
AD652

Overview
Monolithic Synchronous Voltage-to-Frequency Converter AD652 FEATURES Full-scale frequency (up to 2 MHz) set by external system clock Extremely low linearity error (0.
005% max at 1 MHz FS, 0.
02% max at 2 MHz FS) No critical external components required Accurate 5 V reference voltage Low drift (25 ppm/°C max) Dual- or single-supply operation Voltage or current input MIL-STD-883 compliant versions available PRODUCT DESCRIPTION The AD652 synchronous voltage-to-frequency converter (SVFC) is a powerful building block for precision analog-todigital conversion, offering typical nonlinearity of 0.
002% (0.
005% maximum) at a 100 kHz output frequency.
The inherent monotonicity of the transfer function and wide range of clock frequencies allow the conversion time and resolution to be optimized for specific applications.
The AD652 is available in five performance grades.
The 20-lead PLCC-packaged JP and KP grades are specified for operation over the 0°C to +70°C commercial temperature range.
The 16-lead CERDIP-packaged AQ and BQ grades are specified for operation over the −40°C to +85°C industrial temperature range.
The AD652SQ is available for operation over the full −55°C to +125°C extended temperature range.
PRODUCT HIGHLIGHTS 1.
The use of an external clock to set the full-scale frequency allows the AD652 to achieve linearity and stability far superior to other monolithic VFCs.
By using the same clock to drive the AD652 and set the counting period (through a suitable divider), conversion accuracy is maintained independent of variations in clock frequency.
2.
The AD652 synchronous VFC requires only one external component (a noncritical integrator capacitor) for operation.
3.
The AD652 includes a buffered, accurate 5 V reference.
The AD652 uses a variation of the charge-balancing technique to perform the conversion function.
The AD652 uses an external clock to define the full-scale output frequency, rather than relying on the stability of an external capacitor.
The result is...


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