AD7278

3 MSPS,8-Bit ADC in 6-Lead TSOT
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Product Details

The AD7278 is an 8-bit, high speed, low power, successive-approximation ADC. The parts operate from a single 2.35 V to 3.6 V power supply and feature throughput rates of up to 3 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 55 MHz. 

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS, and the conversion is also initiated at this point. There are no pipeline delays associated with the part.

The AD7278 uses advanced design techniques to achieve very low power dissipation at high throughput rates.

The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC; therefore, the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK

Product Highlights

  1. 3 MSPS ADCs in a 6-lead TSOT package
  2. AD7476/AD7477/AD7478 and AD7476A/AD7477A/ AD7478A pin-compatible
  3. High throughput with low power consumption
  4. Flexible power/serial clock speed management. This allows maximum power efficiency at low throughput rates
  5. Reference derived from the power supply
  6. No pipeline delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control.

Product Lifecycle

checked Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Product Recommendations

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AD7278 Companion Parts

Recommended Precison References

  • For improved SNR at 3V , we recommend the AD780 .
  • For high precision and improved power performance , we recommend the REF193 .

Recommended Input Buffer Amplifiers

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

AD7278 Material Declaration
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Most Helpful Review

by Anonymous
I had orderded this product making ocsilloscope 3 months ago. but, i couldn't complete project with this product because other sample ADC used for failure SPI driver setup. my opinion is one. the consumer using SPI interface will need this product for simple project of college.

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by Anonymous, 5 Jan 13
This product is very useful
I had orderded this product making ocsilloscope 3 months ago. but, i couldn't complete project with this product because other sample ADC used for failure SPI driver setup. my opinion is one. the consumer using SPI interface will need this product for simple project of college.
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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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