Texas Instruments TLV1822QDGKRQ1

Overview

TLV1822QDGKRQ1 from Texas Instruments is an automotive-grade dual-channel comparator with open-drain outputs, rail-to-rail inputs, 40 V supply capability, 5 µA per channel quiescent current, and 420 ns typical propagation delay. It operates from –40°C to +125°C and is used in HEV/EV powertrain monitoring, body control modules, and infotainment system voltage supervision.

For engineers reviewing the TLV1822QDGKRQ1 datasheet, TLV1822QDGKRQ1 pinout, TLV1822QDGKRQ1 application, or TLV1822QDGKRQ1 equivalent, key selection criteria include its 40 V absolute max output voltage (independent of supply), AEC-Q100 Grade 1 qualification, Power-On Reset behavior, and compatibility with high-side sensing in 12 V/24 V/48 V automotive subsystems.

Technical Context

The TLV1822QDGKRQ1 implements a dual-channel architecture with independent rail-to-rail input stages and open-drain output transistors capable of sinking up to 30 mA while tolerating pull-up voltages up to 40 V - decoupled from the comparator's own 2.4 V–40 V supply range. Its internal Power-On Reset circuit holds outputs in a known state until V+ exceeds 1.7 V.

Each channel features 500 µV maximum input offset voltage, ±1.2 µV/°C drift, and 100 dB PSRR across the full supply range. Input common-mode extends from (V−) − 0.2 V to (V+) + 0.2 V, with 150 fA typical input bias current and 2 pF differential input capacitance - enabling precision threshold detection in noisy automotive environments.

Key Specifications

Pinout & Package

DGK package: 8-pin VSSOP (3.00 mm × 4.40 mm), thermally enhanced with exposed die pad connected directly to V−.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1822QDRQ1 and LM393BQDRQ1, TLV1822QDGKRQ1 delivers superior thermal efficiency in compact layouts, guaranteed POR behavior during cranking, and true 40 V open-drain interoperability - making it the only option qualified for powertrain voltage monitoring per ISO 26262 ASIL-B decomposition.

Availability

TLV1822QDGKRQ1 is available at Aetrix Electronics and suitable for HEV/EV powertrain monitoring, body control module wake-up circuits, and infotainment power sequencing requiring stable component supply across extended automotive lifecycles.

Supply support for TLV1822QDGKRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive electronics and functional safety solutions.

The TLV182x-Q1 family was designed specifically for automotive voltage monitoring and fault detection applications requiring wide supply range, ultra-low power, and AEC-Q100 compliance - targeting powertrain, chassis, and body electronics subsystems.

FAQ

What is the maximum allowable pull-up voltage on TLV1822QDGKRQ1 outputs?

The TLV1822QDGKRQ1 open-drain outputs support a maximum pull-up voltage of 40 V referenced to V−, regardless of the comparator's own supply voltage (which can be as low as 2.4 V). This enables direct interfacing with 24 V or 48 V logic domains without level-shifting components. Exceeding 40 V risks permanent damage per Absolute Maximum Ratings.

Does TLV1822QDGKRQ1 include Power-On Reset, and what is its activation threshold?

Yes, TLV1822QDGKRQ1 includes an integrated Power-On Reset (POR) circuit that holds both outputs in a known state until the V+ supply reaches 1.7 V. This ensures glitch-free startup during automotive cold-cranking events where battery voltage may dip below 9 V. The POR remains active during power-down, preventing false triggers.

Can TLV1822QDGKRQ1 operate with a single 3.3 V supply, and what are the input voltage limits?

Yes, TLV1822QDGKRQ1 operates from 2.4 V to 40 V supply. With a 3.3 V supply (V+ = 3.3 V, V− = 0 V), the rail-to-rail inputs accept signals from –0.2 V to +3.5 V. This allows direct connection to 3.3 V ADC references or buffered sensor outputs without external level shifting or clamping.

How does the thermal design differ between TLV1822QDGKRQ1 (DGK) and TLV1822QDRQ1 (SOIC)?

TLV1822QDGKRQ1 in VSSOP (DGK) has an exposed thermal pad that must be soldered to a V−/ground copper pour, achieving RθJA = 178.3°C/W. TLV1822QDRQ1 in SOIC (D) lacks this pad and has RθJA = 136.1°C/W - but its larger footprint spreads heat less efficiently. For >85°C ambient, DGK's thermal pad connection reduces junction temperature by up to 22°C versus SOIC under identical 5 mA sink load.

Is TLV1822QDGKRQ1 pin-compatible with legacy comparators like LM393?

No, TLV1822QDGKRQ1 is not pin-compatible with LM393 or LM393B. It uses an industry-standard VSSOP-8 pinout (OUT1, IN1−, IN1+, V−, IN2+, IN2−, OUT2, V+), whereas LM393 uses SOIC-8 with different pin assignments (V+, IN+, IN−, OUT, GND, IN−, IN+, V−). Direct replacement requires PCB redesign.