AD780ARZ-REEL7

Overview

The AD780ARZ-REEL7 is an ultrahigh precision band gap reference voltage IC manufactured by Analog Devices Inc. It provides a pin-programmable output of either 2.5 V or 3.0 V from input voltages ranging between 4.0 V and 36 V. The device operates within a temperature range of -40°C to +85°C and features a maximum initial accuracy of ±1 mV with a maximum temperature drift of 3 ppm/°C. It supports series or shunt mode operation, sourcing or sinking up to 10 mA, and includes a dedicated temperature output pin.

Feature Summary

• Pin-programmable selection between 2.5 V and 3.0 V output levels without external components
• Ultralow temperature drift and high initial accuracy achieved through laser trimming
• Integrated temperature output pin enabling configuration as a temperature transducer
• Capable of stable operation in both series and shunt modes for positive or negative references

Applications

• Precision reference for high-resolution analog-to-digital converters (ADCs)
• Reference source for digital-to-analog converters (DACs)
• Temperature transducer applications utilizing the linear temperature output pin
• General-purpose precision reference circuits requiring low headroom design

Procurement Notes

Verify that the specific ordering suffix matches the required package type and reel quantity. Confirm RoHS compliance status if environmental regulations apply to your manufacturing process. Ensure the input voltage supply remains within the specified 4 V to 36 V range to maintain guaranteed performance specifications. Check for any recent product change notices regarding assembly sites or material declarations before finalizing procurement.

Selection Notes

Select this component when ultrahigh precision and low drift are critical requirements for the application. The AD780ARZ-REEL7 is suitable for designs needing a programmable 2.5 V or 3.0 V output from a single supply. Consider its low headroom capability if operating near minimum supply voltages. Evaluate the need for the integrated temperature output feature versus using a separate sensor. Verify compatibility with existing PCB footprints for the 8-lead SOIC package.

Part Context

The AD780ARZ-REEL7 belongs to the AD780 family of ultrahigh precision band gap references. This family offers superior performance compared to legacy parts like the LT1019 and AD680. The ARZ variant specifically denotes the 8-lead SOIC package option. The REEL7 suffix indicates the component is supplied in a tape and reel format, facilitating automated surface-mount assembly processes.

Replacement Considerations

The datasheet identifies the AD780 as a plug-in upgrade for the LT1019(A)–2.5 and the AD680. Designers replacing these parts should verify pin compatibility and account for differences in heater supply loading on Pin 7 for LT1019 derivatives.