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AD652:  Monolithic Synchronous Voltage-to-Frequency Converter

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 ...More

AD652:  Monolithic Synchronous Voltage-to-Frequency Converter

Product Description

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.

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  • 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
  • Architecture: Synchronous
  • # Channels: 1-Single Ended
  • Input Voltage Range (V): ±10V
  • Full Scale Fout (kHz): 2500kHz
  • Reference Voltage (V): 5V
  • Accuracy (%/kHz): 2
  • Input Clk Frequency (MHz): 5MHz
  • Voltage Supply (V): +/- 6 to +/- 15
  • Supply Current : 15mA
  • Package: 20-Lead PLCC

Functional Block Diagram for AD652

Similar Products

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Part# Architecture # Channels Input Voltage Range (V) Full Scale Fout (kHz) Reference Voltage (V) Accuracy (%/kHz) Input Clk Frequency (MHz) Voltage Supply (V) Supply Current Package Price* (1000-4999)
AD537 Non-Synchronous 1-Single Ended ±11 150 1 0.25 - +/- 5 to +/- 18 2.5 14-Lead CerDIP $9.65
AD650 Non-Synchronous 1-Single Ended +11 1000 - 0.1 - +/- 9 to +/- 18 8 14-Lead CerDIP, 14-Lead PDIP, 20-Lead PLCC $8.02
AD652 Synchronous 1-Single Ended ±10 2500 5 2 5 +/- 6 to +/- 15 15 20-Lead PLCC $9.92
AD654 Non-Synchronous 1-Single Ended ±14 500 - 0.4 - +/- 5 to +/- 18 2.5 8-Lead PDIP, 8-Lead SOIC $3.76
AD7740 Synchronous 1-Single Ended +2.5 500 2.5 1 1 3 to 5.25 1.5 8-Lead MSOP, 8-Lead SOT-23 $0.91
AD7741 Synchronous 1-Single Ended +2.5 3072 2.5 2 6.144 4.75 to 5.25 8 8-Lead PDIP, 8-Lead SOIC $1.76
AD7742 Synchronous 2-Differential, 3-Pseudo Differential +3.5 3072 2.5 2 6.144 4.75 to 5.25 8 16-Lead PDIP, 16-Lead SOIC -
ADVFC32 Non-Synchronous 1-Single Ended +10 500 - 0.2 - +/- 9 to +/- 18 8 14-Lead PDIP $6.14
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* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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Model
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Status
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  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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.

Production Availability
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

RoHS Compliant
Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.