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AD680:  Bandgap, Low Power 2.5v Reference

Product Details

The AD680 is a bandgap voltage reference which provides a 2.5 V output from inputs between 4.5 V and 36 V. The architecture of the AD680 enables the reference to be operated at a very low quiescent current while still realizing excellent dc characteristics and noise performance. Trimming of the high stability thin-film resistors is performed for initial accuracy and temperature coefficient, resulting in low errors over temperature. The precision dc characteristics of the AD680 make it ideal for use as a reference for D/A converters which require an external precision reference. The device is also ideal for A/D converters and, in general, can offer better performance than the standard on-chip references.

Based upon the low quiescent current of the AD680, which that of many incomplete two-terminal references, the AD680 is recommended for low power applications such as hand-held battery equipment.

A temperature output pin is provided on the 8-pin package versions of the AD680. The temperature output pin provides an output voltage that varies linearly with temperature and allows the AD680 to be configured as a temperature transducer while providing a stable 2.5 V output.

The AD680 is available in five grades. The AD680AN is specified for operation from -40°C to +85°C, while the AD680JN is specified for 0°C to +70°C operation. Both the AD680AN and AD680JN are available in 8-pin plastic DIP packages. The AD680AR is specified for operation from -40°C to +85°C, while the AD680JR is specified for 0°C to +70°C operation. Both are available in an 8-pin Small Outline IC (SOIC) package. The AD680JT is specified for 0°C to +70°C operation and is available in a 3-pin TO-92 package.


  • Low quiescent current: 250 µA max
  • Laser trimmed to high accuracy: 2.5 V ± 5 mV max (AN, AR grades)
  • Trimmed temperature coefficient: 20 ppm/°C Max (AN, AR grades)
  • Low noise: 8 µV p-p from 0.1 Hz to 10 Hz
  • 250 nV/√Hz wideband
  • Temperature output pin (N, R packages)
  • Available in three package styles: 8-Lead PDIP, 8-lead SOIC, and 3-pin TO-92

Functional Block Diagram AD680


Title Content Type File Type
AD680: Bandgap, Low Power 2.5 V Reference Data Sheet  (Rev H, 08/2005) (pdf, 474 kB) Data Sheets PDF
AN-713: The Effect of Long-Term Drift on Voltage References  (pdf, 237 kB) Application Notes PDF
XFET™ References
(Analog Dialogue, Vol. 32, No. 1, 1998)
Analog Dialogue HTML
RAQs index Rarely Asked Questions HTML
What do I need to know about selecting and using Voltage References? FAQs/RAQs HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Voltage Reference Selection & Evaluation Wizard Design Calculators HTML
AD680 SPICE Macro-Model SPICE Models 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.

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Price, packaging, availability

AD680 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD680ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $3.83 $3.47 Y  Material Info PCN Purchase
AD680ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.83 $3.47 Y  Material Info PCN Purchase
AD680ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 750 - $3.47 Y  Material Info PCN Purchase
AD680JRZ Status: Production 8 ld SOIC 8 Comm. Tube, 98 $2.17 $1.84 Y  Material Info PCN Purchase
AD680JRZ-REEL7 Status: Production 8 ld SOIC 8 Comm. Reel, 750 - $1.84 Y  Material Info PCN Purchase
AD680JTZ Status: Production 3 ld TO-92 3 Comm. Tray, 100 $2.17 $1.84 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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