CAT8900D125TBGT3

Overview

The CAT8900D125TBGT3 is a precision series voltage reference IC manufactured by onsemi, housed in an SOT-23-3 surface-mount package. It provides a fixed output voltage of 1.25 V with a tolerance of ±0.4%. The device operates within an input voltage range of 2.7 V to 5.5 V and draws a typical supply current of 800 nA. It features a temperature coefficient of 50 ppm/°C and exhibits low noise of 50 µVp-p over the 0.1 Hz to 10 Hz frequency band. The component is rated for operation across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Delivers a stable fixed output voltage via a series reference topology.
• Achieves high accuracy with a tight initial tolerance specification.
• Maintains performance stability across wide industrial temperature variations.
• Supports low-power applications through ultra-low quiescent current consumption.

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Portable instrumentation requiring low power consumption
• Battery-powered measurement systems

Procurement Notes

Verify component authenticity and datasheet alignment before integration. Confirm that the SOT-23-3 package dimensions match the design footprint. Ensure thermal management strategies accommodate the specified operating temperature range. Check for obsolescence status or lifecycle changes directly from the manufacturer. Validate electrical parameters against specific application requirements.

Selection Notes

Select this component when a precise 1.25 V reference is required with minimal power draw. Consider the ±0.4% tolerance for high-accuracy signal chain designs. Evaluate the 50 ppm/°C temperature coefficient for environments with significant thermal fluctuations. Compare the 800 nA supply current against system battery life constraints. Ensure the input voltage range supports the available supply rails.

Part Context

This part belongs to the CAT8900 series of precision voltage references from onsemi. The series offers various fixed output voltages tailored for different circuit requirements. All members share similar low-power characteristics and compact packaging options. The D125 suffix specifically denotes the 1.25 V output variant. This family targets applications demanding high stability and accuracy in small form factors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative voltage references based on pinout, voltage tolerance, and current consumption specifications.