LM2903HDT

Overview

The LM2903HDT is a dual voltage comparator from STMicroelectronics, housed in an SO-8 surface-mount package. It operates on a single supply of +2V to +36V or split supplies of ±1V to ±18V. The device features a very low supply current of 0.4mA at +5V and includes two independent comparators with differential inputs. Key electrical parameters include a typical input bias current of 25nA, an input offset voltage of 17mV, and a small signal response time of 1.3µs. It supports output sink currents up to 16mA and functions within an extended operating temperature range of -40°C to +150°C.

Feature Summary

• Extended high-temperature operation capability up to +150°C
• Low power consumption with supply current independent of voltage
• Input common-mode voltage range includes ground potential
• Outputs compatible with various logic families including TTL and CMOS

Applications

• High-temperature industrial control systems
• Wide-range single-supply voltage monitoring
• Precision threshold detection in automotive environments
• Battery-powered equipment requiring low quiescent current

Procurement Notes

Verify the specific ordering suffix 'H' confirms the extended temperature rating of -40°C to +150°C against the manufacturer's official documentation. Ensure the 'DT' suffix matches the required tape and reel packaging format for automated assembly processes. Cross-reference the datasheet revision date to confirm the validity of the absolute maximum ratings and electrical characteristics provided.

Selection Notes

Select this component when applications require reliable comparator performance in extreme thermal environments exceeding standard commercial limits. The wide supply voltage range allows flexibility in system design without level shifting. Consider the open-collector output structure for interfacing with different logic voltage levels. Verify that the 1.3µs response time meets the speed requirements of the target application circuit.

Part Context

This part belongs to the LM2903 family of low-power dual voltage comparators manufactured by STMicroelectronics. While standard variants typically operate up to +125°C, the 'H' designation indicates an enhanced version designed for higher thermal tolerance. It shares the same pinout and basic functionality as other LM2903 series devices but offers expanded operational limits suitable for demanding industrial and automotive sectors.

Replacement Considerations

LM2903HD serves as a direct equivalent within the same package and feature set.