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AD652:  Monolithic Synchronous Voltage-to-Frequency Converter

Product Details


The AD652 Synchronous Voltage-to-Frequency Converter (SVFC) is a powerful building block for precision analog-to-digital 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 allows the conversion time and resolution to be optimized for specific applications.

The AD652 uses a variation of the popular 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 a more stable, more linear transfer function, with significant application benefits in both single and multichannel systems.

Gain drift is minimized using a precision low drift reference and low TC on-chip thin-film scaling resistors. Furthermore, the initial gain error is reduced to less than 0.5% by the use of laser-wafer-trimming.

The analog and digital sections of the AD652 have been designed to allow operation from a single-ended power source, simplifying its use with isolated power supplies.

The AD652 is available in five performance grades. The 20-pin PLCC packaged JP and KP grades are specified for operation over the 0°C to +70°C commercial temperature range. The 16- pin cerdip-packaged AQ and BQ grades are specified for operation over the -40°C to +85°C industrial temperature range, and the AD652SQ is available for operation over the full -55°C to +125°C extended temperature range.

FEATURES and BENEFITS

  • 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 5V reference voltage
  • Low drift (25 ppm/°C max)
  • Dual- or single-supply operation
  • Voltage or current input
  • MIL-STD-883 compliant versions available

Functional Block Diagram for AD652

Documentation

Title Content Type File Type
AD652: Monolithic Synchronous Voltage-to-Frequency Converter Data Sheet  (Rev C, 05/2004) (pdf, 779 kB) Data Sheets PDF
AD652: Military Data Sheet  (Rev B, 01/2002) (pdf) Data Sheets PDF
AN-276: Analog to Digital Conversion by Using V/F Converters  (pdf, 646 kB) Application Notes PDF
ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
(Revised 1/03)
Invites Customer Participation in Creative Mil/Aero System Solutions
Recommended Reading PDF
Space Qualified Parts List  (pdf, 93 kB)
This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
Aerospace Information PDF
What is a Voltage to Frequency Converter (VFC) and how can the be used to send analog signals over long distances without loss of accuracy? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD652 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
5962-9322201MEA Status: Production 16 ld CerDIP 16 Mil Tube, 25 $35.92 $32.47 N  Material Info PCN Purchase
AD652AQ Status: Production 16 ld CerDIP 16 Ind Tube, 25 $12.42 $10.89 N  Material Info PCN Purchase
AD652AQ/+ Status: Production 16 ld CerDIP 16 Ind Tube, 25 $14.71 $14.71 N  Material Info PCN Purchase
AD652BQ Status: Production 16 ld CerDIP 16 Ind Tube, 25 $18.64 $17.10 N  Material Info PCN Purchase Sample
AD652JP Status: Production 20 ld PLCC 20 Comm. Tube, 49 $13.42 $11.43 N  Material Info PCN Purchase
AD652JP-REEL Status: Last Time Buy 20 ld PLCC 20 Comm. Reel, 1000 - $11.43 N  Material Info PCN/PDN Purchase
AD652JP-REEL7 Status: Production 20 ld PLCC 20 Comm. Reel, 250 - $11.43 N  Material Info PCN Purchase
AD652JPZ Status: Production 20 ld PLCC 20 Comm. Tube, 49 $12.00 $10.22 Y  Material Info PCN Purchase
AD652JPZ-REEL Status: Production 20 ld PLCC 20 Comm. Reel, 1000 - $10.22 Y  Material Info PCN Purchase
AD652JPZ-REEL7 Status: Production 20 ld PLCC 20 Comm. Reel, 250 - $10.22 Y  Material Info PCN Purchase
AD652KP Status: Production 20 ld PLCC 20 Comm. Tube, 49 $16.65 $14.19 N  Material Info PCN Purchase
AD652KPZ Status: Production 20 ld PLCC 20 Comm. Tube, 49 $15.63 $13.31 Y  Material Info PCN Purchase
AD652KPZ-REEL Status: Production 20 ld PLCC 20 Comm. Reel, 1000 - $12.92 Y  Material Info PCN Purchase
AD652SE/883B Status: Production 20 ld LCC 20 Mil Tube, 54 $34.89 $31.36 N  Material Info PCN Purchase
AD652SQ Status: Production 16 ld CerDIP 16 Mil Tube, 25 $23.31 $20.20 N  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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