Texas Instruments TLV3494AIDR

Overview

TLV3494AIDR from Texas Instruments is a quad nanopower push-pull output comparator optimized for ultra-low-power, single-supply systems. It operates from 1.8 V to 5.5 V, draws only 0.85 µA typical quiescent current per channel, features rail-to-rail input range extending 200 mV beyond supply rails, and delivers 6 µs propagation delay at 100-mV overdrive - enabling precise threshold detection in battery-powered medical sensors and portable instrumentation.

For engineers reviewing the TLV3494AIDR datasheet, TLV3494AIDR pinout, TLV3494AIDR application, or TLV3494AIDR equivalent, key selection criteria include its 14-pin SOIC package, push-pull CMOS output stage (no external pull-up required), ±15 mV max input offset voltage, 74 dB common-mode rejection, and compatibility with low-voltage (e.g., 1.8-V Li-ion or two-cell alkaline) power domains.

Technical Context

The TLV3494AIDR implements four independent high-precision comparators in a single monolithic IC, each with ESD-protected inputs rated for ±3000 V HBM and capable of operating down to 1.8 V. Its rail-to-rail input stage accepts signals from (V–) – 0.2 V to (V+) + 0.2 V, while the push-pull output drives high or low without shoot-through current - eliminating need for external pull resistors and reducing system-level power overhead.

Each channel exhibits < 10 pA input bias current, 2 pF common-mode input capacitance, and stable switching performance across –40°C to +125°C. Propagation delay remains ≤6.5 µs (high-to-low) and ≤6 µs (low-to-high) under 100-mV input overdrive, with rise/fall times under 100 ns into 10-pF load - supporting reliable timing-critical functions like power-on reset and zero-crossing detection.

Key Specifications

Pinout & Package

TLV3494AIDR is housed in a 14-pin SOIC package (body size 8.65 mm × 3.91 mm) with standard JEDEC MO-001AC footprint and 1.27-mm pitch. Thermal resistance R_θJA is 83.8°C/W, supporting operation up to +125°C ambient when properly mounted on a 2-layer PCB with adequate copper pour.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3494IPWR and TLV3704CDR, TLV3494AIDR offers superior thermal performance in SOIC packaging and uniquely supports true 1.8-V operation with push-pull drive - making it the only option among the three that meets both ultra-low-voltage and high-reliability thermal requirements simultaneously.

Availability

TLV3494AIDR is available at Aetrix Electronics and suitable for portable medical equipment, wireless security systems, handheld instruments, and ultra-low-power systems requiring stable component supply across extended production lifecycles.

Supply support for TLV3494AIDR 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 over 90 years of innovation in precision signal chain and power management solutions.

The TLV349x product line was designed specifically for nanopower, low-voltage sensing and decision-making in battery-constrained applications - emphasizing rail-to-rail operation, minimal IQ, and robust input protection for medical, industrial, and consumer edge devices.

FAQ

What is the maximum supply voltage rating for TLV3494AIDR?

The absolute maximum supply voltage for TLV3494AIDR is 5.5 V, as specified in Section 7.1 of the SBOS262E datasheet. Operation above this voltage risks permanent damage. The device is characterized for reliable functional operation between 1.8 V and 5.5 V, with optimal performance observed across this full range - including stable 6 µs propagation delay and <10 pA input bias current at both extremes.

Does TLV3494AIDR support rail-to-rail input operation?

Yes, TLV3494AIDR supports true rail-to-rail input operation with common-mode voltage range extending 200 mV beyond both supply rails - i.e., from (V–) – 0.2 V to (V+) + 0.2 V. This capability is confirmed in Section 7.7 Electrical Characteristics and enables direct interface with sensors whose output exceeds V+ or falls below V–, such as thermocouple amplifiers or bridge-based pressure transducers.

Can TLV3494AIDR drive an LED directly?

No, TLV3494AIDR cannot drive an LED directly. Its push-pull output is rated for ±5 mA sink/source (per Section 7.7), but forward voltage and current requirements of typical LEDs exceed safe operating limits without series current-limiting resistance. For indicator use, a 1–10 kΩ series resistor must be added between OUTx and V+ or V– to limit current to ≤1 mA - preserving output integrity and avoiding violation of VOH/VOL specifications.

Is external hysteresis required for TLV3494AIDR in noisy environments?

Yes, external hysteresis is recommended when TLV3494AIDR processes noisy signals. The device has no internal hysteresis; its input offset voltage band (±15 mV max) creates susceptibility to chatter near threshold. TI Application Note SBOS262E Figure 17 shows a verified 39-kΩ/560-kΩ feedback network that sets ~380 mV hysteresis - effectively suppressing false triggering while maintaining 6 µs response time for clean transitions.

What is the thermal resistance (RθJA) of TLV3494AIDR in SOIC package?

The junction-to-ambient thermal resistance (RθJA) for TLV3494AIDR in 14-pin SOIC package is 83.8°C/W, as documented in Section 7.6 Thermal Information of the SBOS262E datasheet. This value assumes standard JEDEC 2S2P test board conditions (2-layer PCB, 1-in² copper pour). Actual thermal performance improves with enhanced copper area, thermal vias, or heatsinking - enabling reliable operation up to +125°C ambient in well-designed layouts.