Texas Instruments TLV1822QDDFRQ1

Overview

TLV1822QDDFRQ1 from Texas Instruments is an automotive-grade dual-channel comparator with open-drain outputs, rail-to-rail inputs, 40V supply capability, 5μA per channel quiescent current, and 420ns typical propagation delay. It operates from –40°C to +125°C and is used in HEV/EV powertrain monitoring for voltage threshold detection with high-side sensing.

For engineers reviewing the TLV1822QDDFRQ1 datasheet, TLV1822QDDFRQ1 pinout, TLV1822QDDFRQ1 application, or TLV1822QDDFRQ1 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, 40V open-drain output pull-up independence, Power-On Reset (POR) behavior, and thermal performance in SOIC-8 packaging.

Technical Context

The TLV1822QDDFRQ1 implements a dual-channel architecture with independent input stages featuring rail-to-rail common-mode range (–0.2 V to V+ + 0.2 V) and internal ESD protection with lower-clamp diodes to V– and soft upper clamps to V+. Its open-drain output supports pull-up voltages up to 40 V independent of V+, enabling level translation across domains.

Each channel integrates a dedicated Power-On Reset circuit that holds outputs in a known state until V+ reaches ≥1.7 V, preventing false triggering during system power-up/down. Propagation delay remains stable across 2.4 V–40 V supply range and –40°C to +125°C ambient, with 420 ns typical at 12 V and 100 mV overdrive.

Key Specifications

Pinout & Package

TLV1822QDDFRQ1 is packaged in an 8-pin SOIC (D package) with 3.91 mm × 4.90 mm body size and exposed thermal pad connected directly to V– for enhanced thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel open-drain comparator applications.

Compared with TLV1822QDDFRQ1, TLV1822QDRQ1 offers identical functionality with relaxed thermal constraints, while LM393BQDRQ1 trades off speed, supply range, and POR for broader legacy design reuse-neither is pin-compatible nor drop-in replaceable without validation.

Availability

TLV1822QDDFRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery management, automotive body control modules, infotainment power sequencing, and engine control unit sensor supervision requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TLV1822QDDFRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in automotive-grade IC design and functional safety certification.

The TLV1822QDDFRQ1 belongs to TI's TLV182x-Q1 family of AEC-Q100 qualified comparators engineered specifically for high-reliability automotive sensing, power monitoring, and fault-detection applications where supply flexibility, low power, and deterministic startup are critical.

FAQ

What is the maximum allowable pull-up voltage on the TLV1822QDDFRQ1 open-drain outputs?

The TLV1822QDDFRQ1 open-drain outputs support pull-up voltages up to 40 V referenced to V–, independent of the comparator's supply voltage (V+). This allows interfacing with higher-voltage logic domains or driving external FET gates directly. Exceeding 40 V risks violating absolute maximum ratings and may cause permanent damage. Always ensure the pull-up source is current-limited to ≤1 mA for reliable operation.

Does TLV1822QDDFRQ1 include Power-On Reset (POR), and how does it behave?

Yes, TLV1822QDDFRQ1 includes an integrated Power-On Reset circuit that holds both outputs in a known state (high-impedance for open-drain) until V+ rises above 1.7 V. This prevents false triggering during power-up or brownout conditions. Once V+ exceeds the POR threshold, outputs respond normally to input conditions. The POR function is active across the full –40°C to +125°C temperature range.

Can unused comparator inputs on TLV1822QDDFRQ1 be left floating?

No - unused inputs on TLV1822QDDFRQ1 must never be left floating or shorted together. Due to its high bandwidth and low offset, floating inputs cause oscillation and false outputs. Instead, tie one input to a stable voltage within the rail-to-rail range (e.g., V– or V+) and the other to a ≥50 mV offset voltage (e.g., reference or divider node) to ensure stable DC bias and prevent noise-induced chatter.

What is the thermal pad connection requirement for TLV1822QDDFRQ1 in SOIC-8 (DDF) package?

The exposed thermal pad on the TLV1822QDDFRQ1 DDF package must be soldered directly to the V– (ground) net on the PCB. This connection is mandatory for both thermal performance (reducing R_θJA to ~125°C/W) and ESD robustness. Failure to connect the pad degrades junction temperature rise and compromises AEC-Q100 qualification integrity under sustained load conditions.

How does TLV1822QDDFRQ1 differ from TLV1812QDDFRQ1?

TLV1822QDDFRQ1 features open-drain outputs optimized for wired-OR logic, level translation, and high-voltage pull-up (up to 40 V), whereas TLV1812QDDFRQ1 uses push-pull outputs capable of both sourcing and sinking current. Both share identical supply range (2.4 V–40 V), quiescent current (5 μA/channel), propagation delay (~420 ns), and AEC-Q100 Grade 1 qualification-but output architecture dictates interface topology and load drive capability.