REF3133AIDBZT

Overview

The REF3133AIDBZT is a fixed-output series voltage reference from Texas Instruments, providing a precise 3.3 V output in a compact SOT-23-3 surface-mount package. It features an initial accuracy of ±0.2% and a maximum temperature coefficient of 20 ppm/°C across the industrial temperature range of -40°C to +125°C. The device operates with a typical supply current of 100 µA and supports a maximum output current of 10 mA. It requires no external load capacitor for stability and functions with a minimum input-to-output differential voltage of 5 mV under no-load conditions.

Feature Summary

• Ultra-low quiescent current consumption suitable for battery-powered applications
• Capacitor-free stability ensuring reliable operation with any capacitive load
• High precision with tight initial accuracy and low temperature drift specifications
• Compact three-pin SOT-23 footprint minimizing printed circuit board area

Applications

• Portable and battery-supplied electronic devices
• Data acquisition systems requiring stable reference voltages
• Medical equipment needing high precision analog references
• Handheld test and measurement instruments

Procurement Notes

Verify the complete part number including suffixes such as 'A' for accuracy grade and 'DBZT' for package type against official Texas Instruments documentation. Confirm that the specific batch meets RoHS compliance requirements if mandated by your design standards. Ensure the ordering quantity matches the available packaging options, typically cut tape or reel, as specified in the manufacturer's latest procurement guidelines.

Selection Notes

Select this component when a 3.3 V reference is required with high precision and minimal power consumption. The ±0.2% accuracy and 20 ppm/°C drift make it suitable for sensitive analog circuits. Consider the 10 mA output capability for driving moderate loads without external buffering. The wide operating temperature range ensures reliability in harsh environments compared to commercial-grade alternatives.

Part Context

This device belongs to the REF31xx family of precision, low-power, low-dropout series voltage references. The family shares common architectural features including ultra-small packaging and low standby current. Other members in the series offer different fixed output voltages while maintaining similar performance characteristics regarding noise, drift, and power efficiency for portable applications.

Replacement Considerations

Direct substitutes within the same family include REF3130AIDBZT (3.0 V) and REF3125AIDBZT (2.5 V) if voltage levels differ. For lower power but slightly higher drift, consider the REF3033AIDBZT. Verify pin compatibility and thermal performance before swapping with other manufacturers' SOT-23-3 voltage references.