CAT8900B125TBGT3

Overview

The CAT8900B125TBGT3 is a precision series voltage reference IC manufactured by onsemi. It provides a fixed output voltage of 1.25 V with an initial accuracy of ±0.08%. The device operates within an input voltage range of 2.7 V to 5.5 V and delivers a maximum output current of 10 mA while consuming only 800 nA of supply current. It features a temperature coefficient of 50 ppm/°C and low noise characteristics, specified as 50 µVp-p in the 0.1 Hz to 10 Hz bandwidth. The component is housed in a compact SOT-23-3 package and is rated for operation between -40°C and +85°C.

Feature Summary

• Provides high-precision fixed voltage output with tight initial tolerance
• Operates with ultra-low quiescent current consumption
• Features low noise performance suitable for sensitive analog circuits
• Utilizes compact surface-mount packaging for space-constrained designs

Applications

• Precision data acquisition systems
• Battery-powered instrumentation
• Portable medical devices
• High-resolution analog-to-digital converter references

Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified suppliers. Confirm RoHS compliance status and lot traceability upon receipt. Check for obsolescence notices as availability may be limited. Ensure storage conditions meet manufacturer specifications to maintain parameter stability. Validate part markings against official datasheet documentation before integration.

Selection Notes

Select this component when precise voltage referencing is required with minimal power draw. The 1.25 V output suits applications needing stable reference levels for ADCs or DACs. Consider the SOT-23-3 package constraints for thermal management. Evaluate the 50 ppm/°C drift against environmental temperature variations. Compare noise specifications with system sensitivity requirements.

Part Context

This part belongs to the CAT8900 family of precision voltage references from onsemi. The family includes variants with different output voltages and accuracies. The CAT8900 series is designed for low-power, high-accuracy applications requiring stable reference voltages. It complements other PMIC offerings in portable and industrial electronics.

Replacement Considerations

Direct substitutes include CAT8900D120TBGT3 (1.2 V, ±5%) and CAT8900B125TBGT3 itself if sourcing under different suffixes. Verify pinout compatibility and electrical parameters match exactly. Cross-reference with other series references like LM4040 if form factor allows.