LT1009S8#PBF

Voltage Reference Overview

The LT1009S8#PBF is a precision shunt voltage reference manufactured by Analog Devices Inc., housed in an 8-pin SOIC surface-mount package. It provides a nominal output voltage of 2.5 V with an initial accuracy of 0.4%. The device features a temperature coefficient of 25 PPM/°C and supports a maximum input voltage of 35 V. It operates within a current range up to a maximum shunt current of 10 mA, with a minimum operating current typically around 400 µA as per the series specifications. The component functions without a shutdown mode and is rated for an operating temperature range from 0°C to +70°C.

Voltage Reference Feature Summary

• Precision trimmed 2.5V shunt regulator diode with low dynamic impedance
• On-chip trimming minimizes initial voltage tolerance and temperature drift
• Third terminal allows reference voltage adjustment to calibrate out system errors

Voltage Reference Applications

• Pin-to-pin replacement for LM136 components
• Reference source for 8-bit A/D and D/A converters
• Digital voltmeter circuits
• Current loop measurement and control systems

Voltage Reference Procurement Notes

Verify the specific suffix #PBF indicates lead-free RoHS compliance and tube packaging configuration. Confirm the manufacturer designation matches Analog Devices Inc. rather than other vendors offering equivalent part numbers. Ensure the SOIC-8 package dimensions align with the target PCB footprint requirements before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a stable 2.5V reference is required in space-constrained designs utilizing surface-mount technology. The 0.4% initial accuracy and 25 PPM/°C temperature coefficient suit applications demanding moderate precision. Consider the 35V maximum input voltage limit and 10mA shunt current capability to ensure adequate headroom for the specific circuit load conditions.

Voltage Reference Part Context

This part belongs to the LT1009 series of precision voltage references. The series is characterized by its ability to replace older discrete or TO-can based references like the LM136 directly in existing designs. The S8 suffix specifically denotes the 8-lead SOIC plastic package variant, distinguishing it from metal can or through-hole options within the same functional family.

Voltage Reference Replacement Considerations

• LM136