AD780BRZ

Overview

The AD780BRZ 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 features a maximum temperature coefficient of 3 ppm/°C and low initial error, with a maximum variation of 0.9 mV over the -40°C to +85°C range. It operates in series or shunt mode, 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 configurations
• Ultralow drift performance achieved through laser trimming of resistors
• Capable of operating in both series and shunt modes for positive or negative references
• Integrated temperature output pin providing linear voltage response to ambient changes

Applications

• Precision reference for high-resolution analog-to-digital converters (ADCs)
• Reference source for digital-to-analog converters (DACs)
• Temperature transducer applications utilizing the dedicated TEMP pin
• General-purpose precision reference circuits requiring low noise

Procurement Notes

Verify that the specific order contains the Z suffix to ensure RoHS compliance as indicated in the ordering guide. Confirm package type matches the required SOIC-8 footprint. Check current availability status as supply conditions may vary. Ensure application requirements align with the specified industrial temperature range and input voltage limits before procurement.

Selection Notes

Select this component when ultrahigh precision and low drift are critical for system accuracy. The AD780BRZ serves as a direct pin-compatible upgrade for legacy references like the LT1019 and AD680. Consider the 3.0 V output option to maximize dynamic range for 5 V ADCs without additional buffering. Evaluate the need for external noise reduction capacitors based on specific spectral density requirements.

Part Context

The AD780 belongs to a family of high-performance band gap voltage references designed for demanding analog signal chain applications. The BRZ variant specifically denotes the 8-lead SOIC package version within the AD780 product line. This series is engineered to enhance the performance of data converters by providing stable, low-noise reference voltages across varying environmental conditions.

Replacement Considerations

The AD780BRZ is documented 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 if applicable.