Texas Instruments TLV1822DGKR

Overview

TLV1822DGKR from Texas Instruments is a dual-channel, 40V rail-to-rail input comparator with open-drain outputs, 5 μA per channel quiescent current, 420 ns typical propagation delay at 12 V, and Power-On Reset (POR) functionality. It operates across –40°C to +125°C and supports industrial motor drive voltage monitoring and factory automation level detection.

For engineers reviewing the TLV1822DGKR datasheet, TLV1822DGKR pinout, TLV1822DGKR application, or TLV1822DGKR equivalent, this page delivers verified electrical parameters, dual-comparator open-drain interface behavior, thermal performance in VSSOP-8, and functional safety–capable design context for high-voltage analog signal conditioning.

Technical Context

The TLV1822DGKR implements two independent open-drain comparators with rail-to-rail inputs spanning (V−) − 0.2 V to (V+) + 0.2 V and internal POR circuitry that holds outputs low until supply reaches ≥2.4 V. Each channel draws only 5 μA at 25°C and maintains ≤4 mV input offset over full temperature range.

Its open-drain architecture allows output pull-up to voltages up to 40 V-fully independent of the comparator's own 2.4–40 V supply-and supports wired-OR logic, level translation, and direct interfacing with 24 V PLC inputs or MOSFET gate drivers without external level shifters.

Key Specifications

Pinout & Package

DGK package is an 8-pin VSSOP (3.00 mm × 4.40 mm) with exposed thermal pad connected directly to V−.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV1822IDR, TLV1822DGKR uniquely combines ultra-low power, fast response, built-in POR, and 40 V open-drain tolerance - making it optimal for next-generation industrial controllers where startup integrity and energy efficiency are non-negotiable.

Availability

TLV1822DGKR is available at Aetrix Electronics and suitable for industrial motor drives, factory automation systems, and appliance safety interlocks requiring stable component supply and long-term manufacturability.

Supply support for TLV1822DGKR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TLV182x family was designed specifically for high-voltage, low-power analog monitoring in harsh environments - targeting applications needing rail-to-rail sensing, open-drain flexibility, and guaranteed power-up behavior without external reset circuitry.

FAQ

What is the maximum allowable pull-up voltage on TLV1822DGKR outputs?

The TLV1822DGKR open-drain outputs support pull-up voltages up to 40 V - independent of the device's own supply voltage (2.4–40 V). This enables direct interfacing with 24 V PLC inputs or 36 V battery monitors without level-shifting components. Exceeding 40 V violates Absolute Maximum Ratings and risks permanent damage to the output clamp structure.

Does TLV1822DGKR require external hysteresis for stable operation?

TLV1822DGKR does not include internal hysteresis; external hysteresis must be added via positive feedback if noise immunity is required in slow-moving or noisy input signals. The device's 150 fA input bias current and rail-to-rail inputs simplify hysteresis network design - typically implemented with two resistors from OUT to IN+ - without loading error or common-mode shift.

Can TLV1822DGKR operate from a 3.3 V supply while driving a 24 V pull-up?

Yes. TLV1822DGKR can be powered from 3.3 V while its outputs are pulled up to 24 V - a core feature of its open-drain architecture. The output leakage remains ≤0.1 nA across temperature, ensuring minimal current draw and stable HIGH-state definition. This configuration is validated in TI's application notes for industrial I/O modules.

How does the Power-On Reset (POR) function behave on TLV1822DGKR?

TLV1822DGKR's POR circuit activates whenever supply voltage crosses 2.4 V during power-up or power-down, holding both open-drain outputs low for ≤200 μs. This prevents undefined states or false triggers in downstream logic. Unlike push-pull comparators, the open-drain POR state requires an external pull-up to establish a defined HIGH level after reset release.

Is TLV1822DGKR pin-compatible with other dual comparators in VSSOP-8?

No - TLV1822DGKR uses a non-standard pinout optimized for thermal performance and signal isolation: V− is Pin 4 (center-bottom), V+ is Pin 8 (top-right), and outputs are on Pins 1 and 7. It is not pin-compatible with LM393DR (SOIC) or TLV1812DGKR (push-pull variant); board redesign is required for substitution.