TLV1821QDBVRQ1

Comparators Overview

The TLV1821QDBVRQ1 is an automotive-grade, single-channel analog comparator from the Texas Instruments TLV182x-Q1 family. It features a wide supply voltage range of 2.4V to 40V and operates within an ambient temperature range of -40°C to +125°C. The device utilizes rail-to-rail inputs and provides an open-drain output capable of being pulled up to 40V independent of the supply voltage. Key electrical characteristics include a quiescent current of 7µA per channel, a typical propagation delay of 900ns at low overdrive, and a maximum input offset voltage of 3mV.

Comparators Feature Summary

• Qualified for automotive applications with AEC-Q100 Grade 1 certification
• Features rail-to-rail input capability extending beyond supply rails
• Includes internal Power-On Reset (POR) circuitry for known start-up states
• Open-drain output allows logic level translation and independent pull-up voltages

Comparators Applications

• HEV/EV and power train systems
• Infotainment and cluster displays
• Body control modules

Comparators Procurement Notes

Verify that the ordering suffix DBVR corresponds to the SOT-23-5 package variant. Confirm the Q1 suffix indicates AEC-Q100 qualification for automotive use. Ensure the specific revision matches the design requirements. Check datasheet notes regarding ESD protection limits and input current constraints when signals exceed supply rails.

Comparators Selection Notes

Select this component when high-voltage operation up to 40V is required in a micro-power application. The open-drain output is suitable for interfacing with different logic levels or driving capacitive loads like MOSFET gates. Consider the alternative TLV1811QDBVRQ1 if a push-pull output stage is preferred to eliminate external pull-up resistors.

Comparators Part Context

This part belongs to the TLV18xx-Q1 family of comparators, which also includes dual (TLV1822-Q1) and quad (TLV1824-Q1) channel variants. The family shares common specifications such as 5µA quiescent current and rail-to-rail inputs. The 'L' suffix variants offer alternate pinouts for compatibility with legacy devices like the LMC7211.

Comparators Replacement Considerations

The TLV1811QDBVRQ1 serves as a functional substitute if a push-pull output is acceptable instead of open-drain. For legacy upgrades, the TLV1821LQDBVRQ1 offers a compatible pinout for older designs using LMC7221 or TLV7221 components.