LT1011AIS8#PBF

Overview

The LT1011AIS8#PBF is a general-purpose voltage comparator manufactured by Analog Devices Inc. It operates within a supply voltage range of 3V to 36V or ±1.5V to ±18V. Key electrical specifications include a maximum input offset voltage of 0.75mV at ±15V, a maximum input bias current of 35nA at ±15V, and a guaranteed minimum large-signal voltage gain of 200,000 V/mV. The device features an open-collector output capable of sourcing or sinking 50mA. It provides a typical response time of 150ns and maintains a common-mode rejection ratio of 115dB. The component functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Pin-compatible with LM111 series devices while offering significantly improved input characteristics including lower bias current and offset voltage.
• Features a floating transistor output that allows driving loads referenced to ground, negative supply, or positive supply.
• Includes dedicated Balance and Strobe pins for offset adjustment, hysteresis addition, and forced output state control.
• Capable of handling differential input voltages up to the full supply voltage without damage.

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and RoHS compliance when ordering. Confirm the S8 package designation matches the required surface-mount footprint. Ensure the AI grade meets the necessary -40°C to +85°C operating temperature requirements for the target environment. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this component when high precision and speed are required in a general-purpose comparator application. The LT1011A offers superior DC parameters compared to standard LM111 equivalents, specifically regarding offset voltage drift and bias current. Consider the open-collector output topology for flexibility in interfacing with various logic families and supply rails. Evaluate the strobe functionality if system-level synchronization or output disabling is necessary.

Part Context

The LT1011 series represents a high-performance analog comparator designed as an upgrade to legacy LM111 devices. The LT1011A variant specifically guarantees tighter tolerances for offset voltage and bias current. This family is engineered for applications demanding fast switching speeds combined with high DC accuracy. The SOIC-8 package provides a compact solution for space-constrained printed circuit board designs.

Replacement Considerations

LM111H/NOPB (Texas Instruments)