AD680JR-REEL7

Overview

The AD680JR-REEL7 is a laser-trimmed band gap voltage reference providing a fixed 2.5 V output from input voltages between 4.5 V and 36 V. It operates with a maximum quiescent current of 250 μA and features an initial accuracy of ±0.4%. The device exhibits a temperature coefficient of 25 ppm/°C over the 0°C to 70°C range, with low noise characteristics of 10 μV p-p (0.1 Hz to 10 Hz). It is housed in an 8-lead SOIC package.

Feature Summary

• Laser trimmed for high initial accuracy and stable temperature coefficients without external components
• Low quiescent current operation suitable for power-sensitive applications
• Integrated temperature output pin on 8-lead packages enabling transducer configuration

Applications

• Reference for data converters requiring external precision voltage sources
• Hand-held and battery-operated equipment
• Portable equipment power supplies

Procurement Notes

Verify the specific suffix REEL7 indicates tape and reel packaging containing 1,000 units per reel. Confirm the 'J' grade designation corresponds to the 0°C to 70°C operating temperature range and ±0.4% initial accuracy specifications. Ensure compatibility with standard 8-lead SOIC footprint requirements.

Selection Notes

Select this component when a fixed 2.5 V reference is required with low power consumption. The J-grade specification limits operation to commercial temperatures (0°C to 70°C). Consider the integrated temperature output pin if environmental monitoring is needed alongside voltage referencing.

Part Context

The AD680 series utilizes a patented band gap architecture merging the amplifier and core functions. This design achieves precision DC characteristics and low noise while maintaining quiescent currents comparable to incomplete two-terminal references. The family includes various grades and packages for different thermal and accuracy needs.

Replacement Considerations

AD680JRZ-REEL7

FAQ

What is the function of Pin 3 on the 8-lead package?

Pin 3 provides a temperature output voltage that varies linearly with temperature at a sensitivity of 2 mV/°C, allowing the device to function as a temperature transducer.

How does the AD680 handle transient loads?

The output stage provides superior dynamic load regulation. A series resistor or a capacitor connected from the output to ground can be used to decouple the reference from fast transients caused by switching networks.