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AD7680:  3 mW, 100 kSPS, 16-Bit ADC in 6 Lead SOT-23

Product Details


The AD7680 is a 16-bit, fast, low power, successive approximation ADC. The part operates from a single 2.5 V to 5.5 V power supply and features throughput rates up to 100 kSPS. The part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 7 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 pipelined delays associated with the part.

The AD7860 uses advanced design techniques to achieve very low-power dissipation at fast throughput rates. The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK frequency.

Product Highlights

  1. First 16-bit ADC in a SOT-23 package.
  2. High throughput with low power consumption.
  3. Flexible power/serial clock speed management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. This allows the average power consumption to be reduced when a power-down mode is used while not converting. The part also features a shutdown mode to maximize power efficiency at lower throughput rates. Power consumption is 0.5 μA max when in shutdown.
  4. Reference derived from the power supply.
  5. No pipeline delays.

Applications

  • Process control
  • Battery-powered systems:
    Personal digital assistants
    Medical instruments
    Mobile communications
  • Instrumentation and control systems
  • Remote data acquisition systems
  • High speed modems
  • Optical sensors

FEATURES and BENEFITS

  • Fast Throughput Rate: 100 kSPS
  • Specified for VDD of 2.5 V to 5.5 V
  • Low Power:
    3 mW typ at 100 kSPS with 2.5 V supply
    3.9 mW typ at 100 kSPS with 3 V supply
    16.7 mW typ at 100 kSPS with 5 V supply
  • Wide Input Bandwidth:
    86 dB SNR at 10 kHz Input Frequency
  • Flexible Power/Serial Clock Speed Management
  • No Pipeline Delays
  • High Speed Serial Interface SPI®/QSPI™/µWire/DSP Compatible
  • Standby Mode: 0.5 µA max
  • 6-Lead SOT-23 and 8-Lead MSOP packages

Functional Block Diagram for AD7680

Documentation

Title Content Type File Type
AD7680: 3 mW, 100 kSPS,16-Bit ADC in 6-Lead SOT-23 Data Sheet  (Rev A, 05/2011) (pdf, 263 kB) Data Sheets 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-214: Ground Rules for High Speed Circuits  (pdf, 356 kB)
Layout and Wiring Are Critical in Video Converter Circuits.
Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Low-Power Data Conversion Technology Enhances Portability
(Electropages, 10/5/2006)
Product Reviews HTML
Lowest-Power 16-Bit ADC Optimizes Portable Designs
(eeProductCenter, 10/4/2006)
Product Reviews HTML
Analog Devices Introduces Fastest, Most Accurate 16-Bit SAR Converter Available in Compact Package
(ChipCenter Product Review. 6/5/2003)
Product Reviews HTML
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
High Speed, High Accuracy 14-Bit, 16-Bit, and 18-Bit PulSAR ADCs  (pdf, 3826 kB)
A PulSAR Family Brochure (6/2006)
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary 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 Precision References for the AD7680

  • For a precision, low dropout 5V reference, we recommend the REF195.
  • For a precision, low dropout 3V reference, we recommend the REF193.
  • For ultrahigh pecision, 3V reference with high supply voltages, we recommend the AD780.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7680 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7680ARJZ-REEL7 Status: Production 6 ld SOT-23 6 Ind Reel, 3000 - $5.31 E  Material Info PCN Purchase Sample
AD7680ARM Status: Last Time Buy 8 ld MSOP 8 Ind Tube, 50 $6.79 $6.14 N  Material Info PCN/PDN Purchase
AD7680ARM-REEL Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 3000 - $6.14 N  Material Info PCN/PDN Purchase
AD7680ARM-REEL7 Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 1000 - $6.14 N  Material Info PCN/PDN Purchase
AD7680ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $5.88 $5.31 Y  Material Info PCN Purchase Sample
AD7680BRJZ-REEL7 Status: Production 6 ld SOT-23 6 Ind Reel, 3000 - $6.07 E  Material Info PCN Purchase Sample
AD7680BRM Status: Last Time Buy 8 ld MSOP 8 Ind Tube, 50 $7.76 $7.01 N  Material Info PCN/PDN Purchase
AD7680BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $6.72 $6.07 Y  Material Info PCN Purchase Sample
AD7680BRMZ-REEL Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 3000 - $6.07 Y  Material Info PCN/PDN Purchase
AD7680BRMZ-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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