Texas Instruments TLV1852DGKR

Overview

TLV1852DGKR from Texas Instruments is a dual-channel, nanopower comparator with push-pull outputs, designed for voltage monitoring and threshold detection in ultra-low-power systems. It operates from 1.8V to 40V supply, draws only 440nA per channel, supports over-the-rail inputs up to 40V above V−, and features Power-On Reset (POR) for reliable startup - enabling use in battery-powered gas meters and motion detectors.

For engineers reviewing the TLV1852DGKR datasheet, TLV1852DGKR pinout, TLV1852DGKR application, or TLV1852DGKR equivalent, this page delivers verified specifications, validated dual-comparator pin functions, real-world housekeeping use cases, and two confirmed alternative options aligned with TI's documented TLV185x family behavior and VSSOP-8 package constraints.

Technical Context

The TLV1852DGKR implements a fail-safe input stage with over-the-rail capability (0V to 40V common-mode range independent of V+), enabling robust sensing in high-voltage or unregulated supply environments. Its internal POR circuit holds output in a known state until supply exceeds 1.5V, preventing false triggers during power-up/down sequences.

It uses a precision input stage with ±0.25mV typical offset voltage, 2.8mV internal hysteresis, and sub-1pA bias current in low common-mode regions - optimized for stable DC thresholding without external hysteresis components. The push-pull output drives loads directly with 1mV VOL (ISINK = 2µA) and supports sourcing/sinking up to 7mA short-circuit current.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00mm × 3.00mm body size), thermally enhanced for low-power operation in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual nanopower comparator applications.

Compared with TLV1852DGKR, TLV1862DGKR offers open-drain flexibility at the cost of added BOM components, while TLV7032DR trades voltage range and ruggedness for marginally lower cost in narrow-voltage applications.

Availability

TLV1852DGKR is available at Aetrix Electronics and suitable for gas detection systems, motion-activated lighting, and smart smoke detectors requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLV1852DGKR 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV185x family was engineered for ultra-low-power, high-voltage housekeeping functions - specifically voltage monitoring, battery management, and sensor threshold detection in always-on, energy-constrained systems.

FAQ

What is the maximum input voltage the TLV1852DGKR can tolerate relative to V−?

The TLV1852DGKR supports an input common-mode range from –0.1V to 40V relative to V−, independent of V+ supply voltage. This over-the-rail capability allows direct connection of sensors or battery terminals without level-shifting circuitry, and is validated across the full –40°C to +125°C temperature range. The TLV1852DGKR maintains fail-safe high-impedance inputs even when V+ is unpowered.

Does the TLV1852DGKR require external hysteresis for stable operation?

No. The TLV1852DGKR integrates 2.8mV typical internal hysteresis, which suppresses noise-induced oscillation at threshold crossings. This eliminates the need for external positive feedback resistors in most DC-sensing applications such as battery voltage monitoring or temperature alerting. The hysteresis value remains stable across supply voltages from 1.8V to 40V and temperatures from –40°C to +125°C, as confirmed in TI's SNOSDE7B datasheet Figure 5-2 and Section 6.4.2.

Can unused comparator channels on the TLV1852DGKR be left floating?

No. Unused inputs on the TLV1852DGKR must not be left floating or tied together, as the device's high bandwidth and low offset can cause oscillation due to internal noise. TI specifies that each unused input should be biased within the valid common-mode range (0V to 40V relative to V−) with ≥50mV differential - for example, grounding IN2– and connecting IN2+ to V+ or a stable reference. Leaving outputs floating is acceptable; never tie push-pull outputs to rails or other outputs.

What is the purpose of the Power-On Reset (POR) feature in the TLV1852DGKR?

The POR circuit in the TLV1852DGKR holds both outputs in a defined logic state (determined by internal design) until the supply voltage V+ rises above 1.5V. This prevents undefined or metastable output behavior during system power-up, power-down, or brown-out events - critical for reliable flagging in safety-critical applications like smoke or gas detection. The POR is active across the full –40°C to +125°C range and does not require external components.

How does the TLV1852DGKR handle reverse battery connection?

The TLV1852DGKR incorporates internal reverse-battery protection rated to withstand –40V on V+ relative to V−. This safeguards the device during incorrect battery installation in portable equipment. Unlike comparators with diode-clamped inputs, the TLV1852DGKR's fail-safe architecture ensures inputs remain undamaged and functional even under reverse polarity, with no degradation in offset voltage, propagation delay, or hysteresis performance after recovery.