AD780BR

Overview

The AD780BR is an ultrahigh precision band gap reference voltage IC manufactured by Analog Devices Inc. It provides a pin-programmable 2.5 V or 3.0 V output from input voltages ranging between 4.0 V and 36 V. The device features a maximum temperature drift of 3 ppm/°C and high accuracy with a maximum initial error of ±1 mV for the specified outputs. It operates within a temperature range of −40°C to +85°C and includes a dedicated temperature output pin. The part supports series or shunt mode operation, sourcing or sinking up to 10 mA, and is housed in an 8-lead SOIC package.

Feature Summary

• Pin programmable selection between 2.5 V and 3.0 V output levels
• Ultralow drift performance with laser trimming for enhanced stability
• Integrated temperature output pin for transducer applications
• Capable of series or shunt mode operation without external components

Applications

• High resolution analog-to-digital converters (ADCs)
• Digital-to-analog converters (DACs)
• Precision general-purpose reference applications
• Temperature transducer circuits

Procurement Notes

Verify the specific ordering suffix and package type when sourcing this component. Confirm RoHS compliance status as indicated by the 'Z' suffix in official documentation. Ensure that the supply voltage requirements align with the 4 V to 36 V input range before integration. Check for any recent product change notices or discontinuance announcements from the manufacturer to ensure long-term availability for production designs.

Selection Notes

Select the AD780BR when ultrahigh precision and low drift are critical requirements for the reference voltage source. Consider its ability to drive capacitive loads and provide negative references in shunt mode if system topology requires it. Evaluate the need for the integrated temperature output feature versus using a separate sensor. Compare quiescent current specifications against power budget constraints for the application environment.

Part Context

The AD780BR belongs to the AD780 family of high precision voltage references produced by Analog Devices Inc. This series is designed to replace older reference components such as the LT1019 and AD680, offering improved performance characteristics. The BR designation indicates a specific grade within the industrial temperature range family, packaged in standard surface-mount technology formats suitable for automated assembly processes.

Replacement Considerations

The AD780BR serves as a pin-compatible performance upgrade for the LT1019(A)–2.5 and the AD680.