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AD7476A:  12-Bit, 1 MSPS, Low-Power A/D Converter in SC70 and MSOP Packages

Product Details


The AD7476A/AD7477A/AD7478A are 12-bit, 10-bit, and 8-bit high speed, low power, successive-approximation analog-to-digital converters (ADCs), respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 13 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 parts. The AD7476A/AD7477A/ AD7478A use advanced design techniques to achieve low power dissipation at high throughput rates. The reference for the part is taken internally from VDD to allow the widest dynamic input range to the ADC. Thus, the analog input range for the part is 0 V to VDD. The conversion rate is determined by the SCLK.

FEATURES and BENEFITS

  • Fast throughput rate: 1 MSPS
  • Specified for VDD of 2.35 V to 5.25 V
  • Low power
    3.6 mW at 1 MSPS with 3 V supplies
    12.5 mW at 1 MSPS with 5 V supplies
  • Wide Input Bandwidth:
    71 dB SNR at 100 kHz input frequency
  • Flexible power/serial clock speed management
  • No pipeline delays
  • High speed serial interface
    SPI®/QSPI™/MICROWIRE™/DSP compatible
  • Standby mode: 1 μA maximum
  • 6-lead SC70 package
  • 8-lead MSOP package

AD7476A Functional Block Diagram

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Of Note ...

The SC70 package is the latest breakthrough for small-size ADCs with resolutions up to 12 bits.

Documentation

Title Content Type File Type
AD7476A/AD7477A/AD7478A: 2.35 V to 5.25 V, 1 MSPS,12-/10-/8-Bit ADCs in 6-Lead SC70 Data Sheet  (Rev F, 01/2011) (pdf, 625 kB) Data Sheets PDF
AN-1141: Powering a Dual Supply Precision ADC with Switching Regulators  (pdf, 640 kB) Application Notes PDF
AN-931: Understanding PulSAR ADC Support Circuitry  (pdf, 299 kB)
This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.
Application Notes PDF
AN-932: Power Supply Sequencing  (pdf, 95 kB) Application Notes PDF
AN-877: Interfacing to High Speed ADCs via SPI  (pdf, 1594 kB) Application Notes PDF
AN-935: Designing an ADC Transformer-Coupled Front End  (pdf, 363 kB) Application Notes PDF
AN-742: Frequency Domain Response of Switched-Capacitor ADCs  (pdf, 401 kB) Application Notes PDF
The Data Conversion Handbook Design Handbooks HTML
MT-031: Grounding Data Converters and Solving the Mystery of  (pdf, 144 kB) Tutorials PDF
MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design  (pdf, 152 kB) Tutorials PDF
MT-001: Taking the Mystery out of the Infamous Formula, "SNR=6.02N + 1.76dB," and Why You Should Care  (pdf, 94 kB) Tutorials PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
MS-2022: Seven Steps to Successful Analog-to-Digital Signal Conversion (Noise Calculation for Proper Signal Conditioning)  (pdf, 277 kB) Technical Articles PDF
MS-2124: Understanding AC Behaviors of High Speed ADCs  (pdf, 276 kB) Technical Articles PDF
Nine Often Overlooked ADC Specifications  (pdf, 445 kB)
Analog-to-digital converters (ADCs) have many specifications; some are more important for a given application than others. Understanding these specifications and controlling external devices affecting the ADC will lead to better performance.
Technical Articles PDF
How to Save Power in Battery Applications Using the Power-Down Mode in an ADC
by Mercedes Casamayor and Claire Croke, Analog Devices, Inc. (Analog Dialogue, Vol. 37, 9/2003)
Analog Dialogue HTML
ICs for Programmable Logic Control and Distributed Control Systems  (pdf, 976 kB)
Analog Devices leadership in industrial IC technology, with the development of the iCMOS™ and iPolar™ processes, has uniquely defined high voltage and low voltage integration to deliver smaller, higher performance, and more cost effective ICs for industrial systems.
Overview PDF
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products


Recommended Input Buffer Amplifiers for the AD7476

  • For precision, single supply, low cost, R-R In/Out, we recommend the AD8655.
  • For precision, wide supply, low cost, we recommend the ADA4000-1.
Recommended Precison References for the AD7476
  • For high precision and improved power performance, we recommend the REF193 (3V) or the REF195 or ADR435 (5V) reference.
  • For improved SNR at 3V, we recommend the AD780.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7476A Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7476AAKSZ-500RL7 Status: Production 6 ld SC70 6 Ind Reel, 500 $4.77 $4.05 Y  Material Info PCN Purchase Sample
AD7476AAKSZ-REEL Status: Last Time Buy 6 ld SC70 6 Ind Reel, 10000 - $4.05 Y  Material Info PCN/PDN Purchase
AD7476AAKSZ-REEL7 Status: Production 6 ld SC70 6 Ind Reel, 3000 - $4.05 Y  Material Info PCN Purchase
AD7476ABKSZ-500RL7 Status: Production 6 ld SC70 6 Ind Reel, 500 $5.95 $5.06 Y  Material Info PCN Purchase
AD7476ABKSZ-REEL Status: Last Time Buy 6 ld SC70 6 Ind Reel, 10000 - $5.06 Y  Material Info PCN/PDN Purchase
AD7476ABKSZ-REEL7 Status: Production 6 ld SC70 6 Ind Reel, 3000 - $5.06 Y  Material Info PCN Purchase Sample
AD7476ABRM Status: Production 8 ld MSOP 8 Ind Tube, 50 $6.18 $5.26 N  Material Info PCN Purchase
AD7476ABRM-REEL Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 3000 - $5.26 N  Material Info PCN/PDN Purchase
AD7476ABRM-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $5.26 N  Material Info PCN Purchase
AD7476ABRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $5.35 $4.55 Y  Material Info PCN Purchase Sample
AD7476ABRMZ-REEL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $4.55 Y  Material Info PCN Purchase
AD7476ABRMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $4.55 Y  Material Info PCN Purchase
AD7476AWYRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $8.57 $7.29 Y  Material Info PCN Purchase Sample
AD7476AWYRMZ-RL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $7.29 Y  Material Info PCN Purchase
AD7476AYKSZ-500RL7 Status: Production 6 ld SC70 6 Ind Reel, 500 $7.14 $6.07 Y  Material Info PCN Purchase Sample
AD7476AYKSZ-REEL7 Status: Production 6 ld SC70 6 Ind Reel, 3000 - $6.07 Y  Material Info PCN Purchase
AD7476AYRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $7.14 $6.07 Y  Material Info PCN Purchase Sample
AD7476AYRMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $6.07 Y  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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