ZXRE125DFTA

Overview

The ZXRE125DFTA is a micropower shunt voltage reference IC from Diodes Incorporated, providing a fixed 1.22V output with ±1% initial accuracy. It operates within a current range of 8µA to 20mA and features a typical temperature coefficient of 20ppm/°C. The device is housed in a surface-mount SOT-23 package (TO-236-3) and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Bandgap circuit architecture designed for precision micropower applications
• Unconditionally stable operation with high tolerance for capacitive loads
• Space-saving small outline SOT-23 surface mount packaging

Applications

• Battery powered equipment
• Precision power supplies
• Portable instrumentation
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix 'D' corresponds to the required 1% tolerance grade before procurement. Confirm that the SOT-23 package dimensions align with the target PCB footprint. Ensure the application design accommodates the specified minimum operating current of 8µA and maximum cathode current of 20mA to maintain stability and accuracy specifications.

Selection Notes

Select this component when a compact, low-power shunt reference is required for portable or battery-operated designs. The 1.22V output level is suitable for low-voltage ADC references. Consider the ±1% tolerance if tighter precision is not mandatory, as other variants offer 0.5% accuracy. Verify that the 20ppm/°C temperature coefficient meets the thermal stability requirements of the system.

Part Context

This part belongs to the ZXRE125 series of bandgap voltage references manufactured by Diodes Incorporated. The series provides various tolerance grades (0.5%, 1%, 2%, 3%) in the same SOT-23 package. The D suffix specifically denotes the 1% tolerance variant, distinguishing it from the C (0.5%), E (2%), and F (3%) options within the same family.

Replacement Considerations

The datasheet identifies the ZRA124 and ZRA125 series as pin-for-pin compatible replacements.