Texas Instruments TLV1822QPWRQ1

Overview

TLV1822QPWRQ1 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 high-side voltage fault detection.

For engineers reviewing the TLV1822QPWRQ1 datasheet, TLV1822QPWRQ1 pinout, TLV1822QPWRQ1 application, or TLV1822QPWRQ1 equivalent, key selection criteria include open-drain output compatibility with 40V pull-up rails, AEC-Q100 Grade 1 qualification, Power-On Reset behavior during system boot, and thermal performance in TSSOP-8 packaging under automotive ambient conditions.

Technical Context

The TLV1822QPWRQ1 implements a dual independent comparator architecture with separate IN1±/IN2± inputs and OUT1/OUT2 open-drain outputs, each internally clamped to V– but not to V+. Its rail-to-rail input stage supports common-mode voltages from (V–) – 0.2V to (V+) + 0.2V across the full 2.4V–40V supply range.

Each channel integrates a dedicated Power-On Reset (POR) circuit that holds outputs in a known low state until V+ exceeds 1.7V, preventing false triggering during power ramp-up or brownout. The open-drain topology enables level-shifting up to 40V independent of V+, with leakage current ≤0.1nA at –40°C to +125°C and sink capability up to 30mA short-circuit current.

Key Specifications

Pinout & Package

TSSOP-8 package (3.00mm × 4.40mm body size), thermally enhanced with exposed die pad connected directly to V– pin for improved power dissipation in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1822IDR and LM393BQDRQ1, the TLV1822QPWRQ1 uniquely delivers AEC-Q100 Grade 1 qualification, 40V-tolerant open-drain outputs, and Power-On Reset - making it the only option for new automotive designs requiring functional safety compliance and wide-supply interoperability.

Availability

TLV1822QPWRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery management, powertrain control units, and body control modules requiring stable component supply across extended automotive temperature ranges and long production lifecycles.

Supply support for TLV1822QPWRQ1 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 electronics and functional safety design.

The TLV1822QPWRQ1 belongs to TI's TLV182x-Q1 family of automotive comparators, engineered specifically for high-reliability voltage monitoring and fault detection in electric vehicle power systems and ADAS subsystems.

FAQ

What is the maximum allowable pull-up voltage on TLV1822QPWRQ1 open-drain outputs?

The TLV1822QPWRQ1 open-drain outputs support pull-up voltages up to 40V, independent of the comparator's V+ supply voltage. This allows direct interfacing with 24V or 42V automotive subsystems without level-shifting circuitry. Exceeding 40V violates absolute maximum ratings and risks permanent damage to the output clamp structure.

Does TLV1822QPWRQ1 include Power-On Reset functionality, and how does it behave?

Yes, TLV1822QPWRQ1 integrates a dedicated Power-On Reset (POR) circuit that forces both OUT1 and OUT2 low until V+ reaches 1.7V. This prevents undefined output states during cold-cranking or battery recovery events. Once enabled, outputs respond normally to input differentials - no external POR components are required.

Can unused comparator channels in TLV1822QPWRQ1 be left floating?

No - unused inputs must never be left floating or tied together. TI specifies that each unused input pair must be biased with ≥50mV differential voltage within the rail-to-rail range (e.g., INx+ to V+, INx– to V–). Floating inputs cause high-frequency chatter due to internal noise amplification, potentially disrupting adjacent channels.

What is the thermal pad connection requirement for TLV1822QPWRQ1 in TSSOP-8 package?

The exposed thermal pad on the TLV1822QPWRQ1 TSSOP-8 package must be soldered directly to the V– (ground) net on the PCB. This connection serves both thermal dissipation and ESD current path functions. Failure to connect the pad degrades thermal resistance by >30% and compromises CDM ESD robustness per AEC-Q100 test requirements.

How does TLV1822QPWRQ1 differ from TLV1812QPWRQ1 in terms of output architecture and system impact?

TLV1822QPWRQ1 uses open-drain outputs, requiring external pull-ups and enabling wired-OR logic and level translation up to 40V. TLV1812QPWRQ1 uses push-pull outputs capable of sourcing/sinking current but limited to (V+) + 0.2V. This makes TLV1822QPWRQ1 essential for interfacing with higher-voltage domains, while TLV1812QPWRQ1 eliminates pull-up resistors in single-supply 12V systems.