TLV1811QDCKRQ1

Comparators Overview

The TLV1811QDCKRQ1 is a single-channel automotive-grade analog comparator from Texas Instruments, featuring rail-to-rail inputs and a push-pull output stage. It operates within a supply voltage range of 2.4 V to 40 V and consumes a quiescent current of 5 μA per channel. The device includes an internal Power-On Reset (POR) circuit to ensure known startup states. Key electrical specifications include a typical propagation delay of 420 ns, an input offset voltage of 500 μV, and a power supply rejection ratio of 100 dB. It is housed in a compact SC-70-5 package.

Comparators Feature Summary

• Rail-to-rail input capability allowing operation across the full supply voltage range without phase inversion.
• Integrated Power-On Reset (POR) function ensures outputs remain in a defined state during system power-up and power-down sequences.
• Push-pull output stage capable of sourcing and sinking milliamps of current for direct load driving.
• Qualified for automotive applications with AEC-Q100 Grade 1 certification.

Comparators Applications

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

Comparators Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel configuration. Confirm the component meets AEC-Q100 Grade 1 requirements for the target ambient operating temperature range. Ensure design compatibility with the push-pull output characteristics and absolute maximum ratings before finalizing procurement.

Comparators Selection Notes

Select this component when a single-channel comparator with high voltage tolerance up to 40 V is required. The push-pull output makes it suitable for driving capacitive loads or LEDs directly. Consider alternative pinout variants if upgrading from legacy LMC72x1 or TLV72x1 devices. Verify that the low quiescent current aligns with system power budget constraints.

Comparators Part Context

This part belongs to the TLV18xx-Q1 family of micro-power comparators designed for automotive environments. The family offers both push-pull (TLV181x-Q1) and open-drain (TLV182x-Q1) output options. All devices share common features including rail-to-rail inputs, low offset voltage, and integrated POR functionality, providing flexibility for various interface and control applications.

Comparators Replacement Considerations

The TLV1811L-Q1 serves as a functional replacement with an alternate pinout compatible with older LMC7211 and TLV7211 families. Direct substitution requires verifying pin alignment differences between standard and alternate pinout configurations.

Comparators FAQ

How does the Power-On Reset feature affect the comparator output?

The internal Power-On Reset circuit holds the output in a known state until the supply voltage reaches the minimum operating level, preventing false triggering during power-up and power-down transitions.

What are the restrictions on unused inputs for this comparator?

Unused inputs must not be tied together to prevent high-frequency chatter caused by internal noise. Instead, they should be connected to a valid voltage within the specified input range that provides at least 50 mV of differential voltage.