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3 V/5 V Low Power, Synchronous Voltage-to-Frequency Converter

  • Package/Case :
  • SOT23
  • Product Categories :
  • Integrated/Special Purpose A/D Converters ; Voltage to Frequency Converters
  • RoHs Status:
  • Lead free/RoHS Compliant
  • Marking Code:
  • VOY
  • In-stock:
  • 25


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AD7740YRT Product Details

The AD7740YRT is a low-cost, ultrasmall synchronous Voltage-to-FrequencyConverter (VFC). It works from a single 3.0 V to3.6 V or 4.75 V to 5.25 V supply consuming 0.9 mA. The AD7740is available in an 8-lead SOT-23 and also in an 8-lead MSOPpackage. Small package, low cost and ease of use were majordesign goals for this product. The part contains an on-chip 2.5 Vbandgap reference but the user may overdrive this using anexternal reference. This external reference range includes VDD.

The full-scale output frequency is synchronous with the clocksignal on the CLKIN pin. This clock can be generated with theaddition of an external crystal (or resonator) or supplied from aCMOS-compatible clock source. The part has a maximuminput frequency of 1 MHz.

For an analog input signal that goes from 0 V to VREF, the outputfrequency goes from 10% to 90% of fCLKIN. In buffered mode,the part provides a very high input impedance and accepts arange of 0.1 V to VDD – 0.2 V on the VIN pin. There is alsoan unbuffered mode of operation that allows VIN to go from–0.15 V to VDD + 0.15 V. The modes are interchangeable usingthe BUF pin.

The AD7740YRT (Y Grade) is guaranteed over the automotivetemperature range of –40°C to +105°C. The AD7740YRT (K Grade)is guaranteed from 0°C to 85°C.

Product Highlights

  • The AD7740YRT is a single channel, single-ended VFC. It isavailable in 8-lead SOT-23 and 8-lead MSOP packages, and isintended for low-cost applications. The AD7740YRT offersconsiderable space saving over alternative solutions.
  • The AD7740YRT operates from a single 3.0 V to 3.6 V or 4.75 Vto 5.25 V supply and consumes typically 0.9 mA when theinput is unbuffered. It also contains an automatic power-downfunction.
  • The AD7740YRT does not require external resistors and capacitorsto set the output frequency. The maximum outputfrequency is set by a crystal or a clock. No trimming or calibrationis required.
  • The analog input can be taken to 150 mV below GND fortrue bipolar operation.
  • The specified voltage reference range on REFIN is from2.5 V to the supply voltage, VDD.
  • Feature

    • Synchronous operation
    • Full-scale frequency set by external system clock
    • 8-lead SOT-23 and 8-lead MSOP packages
    • 3 V or 5 V operation
    • Low power: 3 mW (Typ)
    • Nominal input range: 0 to VREF
    • True –150 mV capability without charge pump
    • VREF range: 2.5 V to VDD
    • Internal 2.5 V reference
    • 1 MHz max input frequency
    • Selectable high impedance buffered input
    • Minimal external components required


    • Isolation of high common-mode voltages
    • Low-cost analog-to-digital conversion
    • Battery monitoring
    • Automotive sensing

    AD7740YRT Pinout
    (Picture: Pinout)

    AD7740YRT Block Diagram
    (Picture: Diagram)

    Technical Parameters

    • Input Type
    • Single-Ended
    • Vin Rangemax | V p p
    • 5.25
    • Output Frequencymax | Hz
    • 500k
    • Linearitymax | %
    • 0.018
    • Istyp | A
    • 1.5m
    • Supply Voltage Range
    • 3V to 5.25V

    AD7740YRT Documents

    • AD7740 Technical Documentation/Data sheet

    AD7740YRT Related Products

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    Shipping More
    Estimated Delivery Time: Dec 05 - Dec 10 days (choose Expedited at checkout).

    Shipping & Payment


    • Shipping Type
    • Ship Fee
    • Lead Time
    • $20.00-$40.00 (0.50 KG)
    • 2-5 days
    • $20.00-$40.00 (0.50 KG)
    • 3-7 days
    • $20.00-$45.00 (0.50 KG)
    • 2-5 days
    • $25.00-$65.00 (0.50 KG)
    • 2-5 days
    • $25.00-$45.00 (0.50 KG)
    • 5-14 days
    • $2.00-$3.00 (0.10 KG)
    • 7-30 days

    Processing Time:Shipping fee depend on different zone and country.


    • Terms of payment
    • Hand Fee
    • Payment Site
    • charge US$30.00 banking fee.
    • charge 4.0% service fee.
    • charge 3.5% service fee.
    • charge US$0.00 banking fee.
    • charge US$0.00 banking fee.

    We provide high quality products, thoughtful service and after sale guarantee

    • We have rich products, can meet your various needs.

      We have rich products, can meet your various needs.

    • Minimum order quantity starts from 1pcs.

      Minimum order quantity starts from 1pcs.

    • Lowest international shipping fee starts from US$2.00.

      Lowest international shipping fee starts from US$2.00.

    • 90 days quality guarantee for all products.

      90 days quality guarantee for all products.


    • Step1:Product

      Step1: Products

    • Step2:Vacuum packaging

      Step2: Vacuum Packaging

    • Step3:Anti-static bag

      Step3: Anti-Static Bag

    • Step4:Individual packaging

      Step4: Individual Packaging

    • Step5:Packaging boxes

      Step5: Packaging Boxes

    • Step6:bar-code shipping tag

      Step6: Bar-Code Shipping Tag

    All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

    Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

    We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

    After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

    Jotrin ESD packing


    1.We provide 90 days warranty.

    2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


    Q: How does Jotrin guarantee that AD7740YRT is the original manufacturer or agent of AD?
    We have a professional business development department to strictly test and verify the qualifications of AD original manufacturers and agents. All AD suppliers must pass the qualification review before they can publish their AD7740YRT devices; we pay more attention to the channels and quality of AD7740YRT products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
    Q: How to find the detailed information of AD7740YRT chips? Including AD original factory information, Integrated/Special Purpose A/D Converters ; Voltage to Frequency Converters application, AD7740YRT pictures?
    You can use Jotrin's intelligent search engine, or filter by Integrated/Special Purpose A/D Converters ; Voltage to Frequency Converters category, or find it through Analog Devices, Inc Information page.
    Q: Are the AD's AD7740YRT price and stock displayed on the platform accurate?
    The AD's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for AD7740YRT, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
    Q: Can I place an order offline?
    Yes. We accept offline orders.
    We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
    Q: What forms of payment can I use in Jotrin?
    TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
    Q: How is the shipping arranged and track my package?
    Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
    Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
    Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
    Q: What is the process for returns or replacement of AD7740YRT?
    All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the AD7740YRT we delivered, we will accept the replacement or return of the AD7740YRT only when all of the below conditions are fulfilled:
    (1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
    (2)We are informed of the defect described above within 90 days after the delivery of AD7740YRT.
    (3)The AD7740YRT is unused and only in the original unpacked packaging.
    Two processes to return the products:
    (1)Inform us within 90 days
    (2)Obtain Requesting Return Authorizations
    More details about return electronic components please see our Return & Change Policy.
    Q: How to contact us and get support, such as AD7740YRT datasheet pdf, AD7740 pin diagram?
    Need any After-Sales service, please feel free contact us:

    Analog Devices, Inc

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