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AD7478:  8-Bit, 1 MSPS, Low Power Successive Approximation ADC Which Operates From A Single 2.35 V to 5.25 V Power Supply

Product Details


The AD7476/AD7477/AD7478 are, respectively, 12-bit, 10-bit, and 8-bit, high speed, low power, successive approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. Each part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 MHz.

The conversion process and data acquisition are controlled using CS 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 initiated at this point. There are no pipeline delays associated with these parts.

The AD7476/AD7477/AD7478 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the parts is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus, the analog input range for the parts are 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 Typ at 1 MSPS with 3 V Supplies
    15 mW Typ at 1 MSPS with 5 V Supplies
  • Wide Input Bandwidth: 70 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 Max
  • 6-Lead SOT-23 Package

Functional Block Diagram for AD7478

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Documentation

Title Content Type File Type
AD7476/AD7477/AD7478: 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SOT-23 Data Sheet  (Rev F, 02/2009) (pdf, 942 kB) Data Sheets PDF
AN-101: Cross Plot Generator Allows Quick A/D Converter Evaluation  (pdf, 280 kB) Application Notes PDF
AN-347: Shielding and Guarding  (pdf, 688 kB)
How to Exclude Interference-Type Noise. What to do and Why to do it-A Rational Approach
Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles 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

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD74xx - No-OS Driver for Renesas Microcontroller Platforms Device Drivers HTML
AD74xx - No-OS Driver for Microchip Microcontroller Platforms Device Drivers HTML
AD7476A IIO Single Channel Serial ADC Linux Driver (Wiki Site) Device Drivers HTML

Evaluation Kits & Symbols & Footprints

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 AD7478

Recommended Precison References for the AD7478
  • For high precision and improved power performance, we recommend the REF193 (3V) or REF195 (5V).
  • 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

AD7478 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7478ARTZ-500RL7 Status: Production 6 ld SOT-23 6 Ind Reel, 500 - $0.96 Y  Material Info PCN Purchase
AD7478ARTZ-REEL7 Status: Production 6 ld SOT-23 6 Ind Reel, 3000 - $0.96 Y  Material Info PCN Purchase
AD7478SRTZ-REEL7 Status: Production 6 ld SOT-23 6 Mil Reel, 3000 - $2.88 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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