Texas Instruments TLV3402IDR

Overview

TLV3402IDR from Texas Instruments is a dual-channel nanopower open-drain comparator with 470 nA per channel supply current, rail-to-rail input range (–0.1 V to VCC + 5 V), and operation across 2.5 V to 16 V supply. It supports industrial temperature range (–40°C to +125°C) and is used in battery-powered threshold detection circuits such as portable medical sensors and wireless security system voltage monitors.

For engineers reviewing the TLV3402IDR datasheet, TLV3402IDR pinout, TLV3402IDR application, or TLV3402IDR equivalent, key selection criteria include ultra-low quiescent current, reverse-battery protection up to 18 V, open-drain CMOS output compatibility with external pull-up networks, and validated performance at 2.7 V minimum supply in harsh-temperature environments.

Technical Context

The TLV3402IDR implements a precision comparator core with input offset voltage of 250 µV (typ), 72 dB common-mode rejection at 5 V, and differential gain of 1000 V/mV - enabling accurate high-impedance signal thresholding without loading source circuits. Its open-drain output stage requires external pull-up for logic-level translation and supports wired-OR configurations.

Designed for single-supply operation from 2.5 V to 16 V (or ±1.25 V to ±8 V), the device features reverse-battery protection and survives input voltages up to VCC + 5 V (max 20 V). Propagation delays are overdrive-dependent: 55 µs (low-to-high) and 30 µs (high-to-low) at 50 mV overdrive with 10 pF load and 1 MΩ pull-up.

Key Specifications

Pinout & Package

TLV3402IDR is packaged in an 8-pin SOIC (D package) with 4.90 mm × 3.91 mm body size and standard JEDEC MS-012AC footprint. The package supports surface-mount reflow and offers thermal resistance RθJA = 201.9°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3402IDR, TLV3402IDRG4 provides identical functionality with RoHS compliance, while TLV3402DR trades extended temperature capability for lower unit cost - making TLV3402IDR the optimal choice for reliability-critical embedded systems requiring full industrial qualification.

Availability

TLV3402IDR is available at Aetrix Electronics and suitable for portable medical equipment, wireless security systems, and handheld instruments requiring stable component supply across long production lifecycles and global manufacturing sites.

Supply support for TLV3402IDR 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 decades of expertise in precision signal conditioning and low-power design.

The TLV340x family was engineered specifically for ultra-low-power threshold detection in battery-constrained systems - delivering nanopower operation without sacrificing input voltage range or temperature robustness.

FAQ

What is the minimum operating supply voltage for TLV3402IDR across its full temperature range?

The TLV3402IDR operates down to 2.7 V across the full industrial temperature range (–40°C to +125°C), as specified in the Recommended Operating Conditions table. At room temperature (25°C), it functions down to 2.5 V, but 2.7 V is the guaranteed minimum for reliable operation across all temperatures. This makes TLV3402IDR suitable for single-cell Li-ion (3.0 V nominal) and two-cell alkaline (3.0 V fresh) applications where voltage droop must be accommodated.

Does TLV3402IDR support rail-to-rail output swing?

No, TLV3402IDR does not provide rail-to-rail output swing because it features an open-drain CMOS output stage. Its output can only pull LOW to within 8 mV of GND (at 2 µA sink current); HIGH-state voltage is determined by the external pull-up resistor and rail. This architecture enables level-shifting and wired-OR logic, but requires careful selection of pull-up value to balance speed, power, and noise immunity - TLV3402IDR is fully characterized with a 1-MΩ pull-up.

Can TLV3402IDR inputs safely exceed the positive supply rail?

Yes, TLV3402IDR inputs are rated for voltages up to VCC + 5 V (with absolute maximum of 20 V), allowing safe operation in high-side sensing and reverse-battery scenarios. This feature enables direct connection to battery terminals or unregulated power rails without external clamping diodes. However, input current must remain within ±10 mA, and the input voltage must not exceed VCC + 5 V or 20 V - whichever is smaller - as defined in Absolute Maximum Ratings.

What is the typical input offset voltage of TLV3402IDR and how does it affect accuracy?

The typical input offset voltage of TLV3402IDR is 250 µV, with a maximum of 4400 µV over the full industrial temperature range. This offset introduces a fixed error in threshold detection - for example, when comparing against a 1.25-V reference, the actual trip point may vary by ±4.4 mV. Designers mitigate this by selecting low-drift references (e.g., REF3312), using trimming resistors, or implementing software calibration in systems with ADC feedback.

How does TLV3402IDR achieve reverse battery protection?

TLV3402IDR achieves reverse battery protection through internal circuitry that blocks conduction paths when VCC is driven negative relative to GND, withstanding up to –18 V on the VCC pin. This prevents destructive current flow during incorrect battery installation in handheld devices. The protection is inherent to the IC's input and supply-stage design - no external components are required, though TVS diodes may still be added for transient suppression in high-noise environments.