LT1011IS8#PBF

Overview

The LT1011IS8#PBF is a general-purpose voltage comparator manufactured by Analog Devices Inc. It operates within a supply voltage range of 3V to 36V and features an open-collector output capable of sourcing or sinking 50mA. The device guarantees a maximum input offset voltage of 0.5mV, a maximum input bias current of 25nA, and a maximum response time of 250ns. It supports single 5V operation and provides pin compatibility with the LM111 series.

Feature Summary

• Pin compatible with LM111 series devices while offering improved input characteristics
• Floating transistor output allows driving loads referenced to ground, negative supply, or positive supply
• Strobe function forces output transistor to off state for controlled high output
• Balanced inputs allow adjustment of input voltage offset or addition of hysteresis

Applications

• SAR A/D Converters
• Voltage-to-Frequency Converters
• Precision RC Oscillator
• Peak Detector
• Motor Speed Control

Procurement Notes

Verify the specific temperature grade and package configuration against project requirements. Confirm that the operating environment falls within the specified -40°C to 85°C range for this suffix. Ensure supply voltages remain within the absolute maximum ratings to prevent permanent damage. Check for any specific handling instructions regarding the SOIC-8 package during assembly.

Selection Notes

Select this component when pin compatibility with LM111 is required but superior speed and lower bias currents are needed. It is suitable for applications requiring a floating output capable of interfacing with various logic families. Consider the strobe feature if precise control over the output state timing is necessary. Evaluate the need for external hysteresis circuits based on input signal noise levels.

Part Context

This part belongs to the LT1011 family of precision voltage comparators. It is designed as a drop-in replacement for the LM111, offering significantly better performance metrics including lower offset voltage drift and higher voltage gain. The IS8 suffix indicates an industrial temperature range and an 8-lead plastic SOIC package.

Replacement Considerations

LM111P

FAQ

How does the LT1011 handle large differential input voltages?

The inputs can tolerate differential voltages up to ±36V and can be raised 40V above the negative supply without damage, independent of the positive supply voltage.

What is the purpose of the STROBE pin?

Pulling current out of the STROBE pin forces the output transistor into an 'off' state, resulting in a high output at the collector regardless of the input conditions.