AD680 Bandgap, Low Power 2.5v Reference

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.

Features and Benefits
  • 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
Linear Products
SPICE Models
Data Sheets
Documentnote
AD680: Bandgap, Low Power 2.5 V Reference Data Sheet (Rev. H)PDF 474 kB
Application Notes
Documentnote
AN-713: The Effect of Long-Term Drift on Voltage References (Rev. 0)PDF 237 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD680ANZ Production8 ld PDIPOTH 50-40 to 85C4.213.82Y
AD680ARZ Production8 ld SOICOTH 98-40 to 85C3.833.47Y
AD680ARZ-REEL7 Production8 ld SOICREEL 750-40 to 85C03.47Y
AD680JRZ Production8 ld SOICOTH 980 to 70C2.171.84Y
AD680JRZ-REEL7 Production8 ld SOICREEL 7500 to 70C01.84Y
AD680JTZ Production3 ld TO-92OTH 1000 to 70C2.171.84Y
AD680: Bandgap, Low Power 2.5 V Reference Data Sheet (Rev. H) ad680
AD680 SPICE Macro-Model ad680
AD680A SPICE Macro-Model ad680
AD680J SPICE Macro-Model ad680
AD680JT SPICE Macro-Model ad680
AN-713: The Effect of Long-Term Drift on Voltage References (Rev. 0) ad580