LT1009IPWR

Voltage Reference Overview

The LT1009IPWR is a precision shunt voltage reference integrated circuit manufactured by Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.2% and a temperature coefficient of 25 PPM/C. The device operates within a junction temperature range of -40°C to +85°C and supports a maximum shunt current of 10 mA, with a minimum operating current of 400 uA. It is housed in an 8-pin TSSOP surface-mount package.

Voltage Reference Feature Summary

• Integrated on-chip trimming minimizes initial voltage tolerance and temperature coefficient for high precision.
• Features an adjustable terminal allowing reference voltage modification within ±5% to compensate for system errors.
• Designed as a low dynamic impedance parallel regulator suitable for direct replacement in existing designs.

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) references
• Digital-to-analog converter (DAC) references
• Power supply monitoring circuits

Voltage Reference Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and temperature grade. Ensure the ordering code matches the required TSSOP-8 configuration and industrial temperature range specifications before procurement.

Voltage Reference Selection Notes

Select this component when a stable 2.5 V reference is required with tight initial accuracy and low drift. The adjustable pin allows fine-tuning for applications demanding higher system-level precision without external trim networks.

Voltage Reference Part Context

This part belongs to the LT1009 series of micro-power precision voltage references. It serves as a drop-in replacement for older discrete zener-based reference solutions, offering superior stability and lower noise characteristics in compact surface-mount packages.

Voltage Reference Replacement Considerations

LT1009IDR: SOIC-8 package variant with identical electrical performance.

Voltage Reference FAQ

How can the output voltage be adjusted?

The third terminal (ADJ) allows the reference voltage to be trimmed by ±5% to eliminate system errors.

What is the purpose of the adjustable pin?

It enables fine-tuning of the reference voltage to compensate for board-level variations or load requirements.