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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, ...More

AD680:  Bandgap, Low Power 2.5v Reference

Product Description

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.

RESOURCES & TOOLS

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TOOLS, SOFTWARE & SIMULATION MODELS

  • 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
  • Vout: 2.5
  • Initial Accuracy (%): 0.2
  • Ref Out TC (ppm/C): 20ppm/C
  • Supply Voltage Range (V): +4.5 to +36
  • Supply Current : 250µA
  • Ref Output Current (mA): 10mA
  • 0.1-10 Hz Noise (µV p-p): 8µV p-p
  • Temp Range(s): -40 to +85,0 to +70
  • Package: DIP,SOIC,TO-92
  • Reference Type: Series

Pin Configuration for AD680

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