Products > Power Supplies > AD7840BQ

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LC2MOS Complete 14-Bit DAC

  • Package/Case :
  • DIP24
  • Product Categories :
  • Analog / Digital & Digital / Analog Converter
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 90


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AD7840BQ Product Details

The AD7840BQ is a fast, complete 14-bit voltage output D/A converter.It consists of a 14-bit DAC, 3V buried Zener reference, DAC output amplifier and high speed control logic.

The part features double-buffered interface logic with a 14-bit input latch and 14-bit DAC latch.Data is loaded to the input latch in either of two modes, parallel or serial.This data is then transferred to the DAC latch under control of an a asynchronous LDAC signal.A fast data setup time of 21ns allows direct parallel interfacing to digital signal processors and high speed 16-bit microprocessors.In the serial mode, the maximum serial data clock rate can be as high as 6Mhz.

The analog output from the AD7840BQ provides a bipolar output range of +-3V.The AD7840BQ is fully specified for dynamic performance parameters such as signal-to-noise ratio and harmonic distortion as well as for traditional dc specifications.Full power output signals up to 20kHz can becreated.

The AD7840BQ is fabricated in linear compatible CMOS (LC2MOS), an advanced, mixed technology process that combines precision bipolar circuits with low power CMOS logic.The part is available in a 24-pin plastic and hermetic dual-in-line packaged (DIP) and is also packaged in 28-terminal plastic leaded chip carrier (PLCC).



  • Complete 14-Bit Voltage Output DAC
  • Parallel and Serial Interface Capability
  • 80 dB Signal-to-Noise Ratio
  • Interfaces to High Speed DSP Processorse.g. ADSP-2100, TMS32010, TMS32020
  • 45 ns min WR Pulse Width
  • Interfaces to High Speed DSP Processorse.g. ADSP-2100, TMS32010, TMS32020
  • Low Power- 70 mW typ
  • Operates from ±5 V Supplies

AD7840BQ Block Diagram
(Picture: Diagram)

Technical Parameters

  • # of Channels
  • 1
  • Resolutionbits
  • 14
  • DAC INLmax | LSBs
  • 1
  • DAC DNLmax | LSBs
  • 0.9
  • Settling Timetyp | s p p
  • Vout Range
  • ±3V
  • Data Input Interface
  • Parallel, SPI

AD7840BQ Documents

  • AD7840 Technical Documentation/Data sheet

AD7840BQ Related Products

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Estimated Delivery Time: Feb 01 - Feb 06 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)
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  • $20.00-$45.00 (0.50 KG)
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  • $25.00-$65.00 (0.50 KG)
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  • 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 AD7840BQ 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 AD7840BQ devices; we pay more attention to the channels and quality of AD7840BQ products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of AD7840BQ chips? Including AD original factory information, Analog / Digital & Digital / Analog Converter application, AD7840BQ pictures?
You can use Jotrin's intelligent search engine, or filter by Voltage Output D/A Converters ; Single-Channel Voltage Output D/A Converters category, or find it through Analog Devices, Inc Information page.
Q: Are the AD's AD7840BQ 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 AD7840BQ, 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 AD7840BQ?
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 AD7840BQ we delivered, we will accept the replacement or return of the AD7840BQ 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 AD7840BQ.
(3)The AD7840BQ 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 AD7840BQ datasheet pdf, AD7840 pin diagram?
Need any After-Sales service, please feel free contact us:

Analog Devices, Inc

Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized module used in test and measurement equipment. In 1967, the company published the first issue of its...
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