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Texas Instruments TLV3491AIDBVR
- Part No.:
- TLV3491AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV3491AIDBVR.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,440
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Product details
Overview
TLV3491AIDBVR from Texas Instruments is a single-channel, nanopower, rail-to-rail input/output comparator with push-pull CMOS output stage, operating from 1.8 V to 5.5 V supply, consuming only 0.8 µA typical quiescent current, and delivering 6 µs propagation delay at 100 mV overdrive - ideal for battery-powered medical sensors and low-voltage portable instrumentation.
For engineers reviewing the TLV3491AIDBVR datasheet, TLV3491AIDBVR pinout, TLV3491AIDBVR application, or TLV3491AIDBVR equivalent, key selection considerations include ultra-low IQ, rail-to-rail input beyond supply rails (±200 mV), push-pull output eliminating external pull-up, SOT-23-5 package footprint, and compatibility with single-cell Li-ion or two-cell alkaline systems.
Technical Context
The TLV3491AIDBVR implements a fully differential input stage with ESD-protected inputs rated ±3000 V HBM, enabling robust operation in noisy portable environments. Its push-pull output drives capacitive loads up to 100 pF without oscillation while maintaining <200 mV VOL/VOH at 5 mA, supporting direct interfacing to MCU GPIOs or logic inputs.
It operates across –40°C to +125°C with input offset voltage of ±15 mV max and dVOS/dT of ±12 µV/°C, ensuring stable threshold detection in temperature-variable applications such as wearable health monitors and remote sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V - supports direct connection to single Li-ion (3.0–4.2 V) or two alkaline cells (2.4–3.2 V) without regulation |
| Quiescent Current | 0.8 µA typical - enables >10-year battery life in coin-cell-powered devices at 1 Hz wake-up rate |
| Propagation Delay | 6 µs at 100 mV overdrive - sufficient for slow analog monitoring (e.g., temperature, voltage thresholds) with margin |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - allows detection of signals below ground or above supply, critical for AC-coupled zero-crossing |
| Output Type | Push-pull CMOS - eliminates need for external pull-up resistor, reduces BOM count and power loss in active-high logic interfaces |
| Input Offset Voltage | ±15 mV max - defines minimum detectable differential signal without hysteresis; requires external hysteresis for noise immunity below this level |
| ESD Rating | ±3000 V HBM - meets IEC 61000-4-2 Level 2 for handheld equipment handling and board-level ESD robustness |
Pinout & Package
TLV3491AIDBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm × 1.30 mm, optimized for space-constrained PCB layouts in wearables and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Highest potential node; must be decoupled with 0.01 µF ceramic + 10 µF electrolytic per layout guidelines |
| V– | Negative supply rail | Lowest potential node; typically connected to system ground; serves as reference for rail-to-rail input range |
| +IN | Noninverting input | Accepts signals up to (V+) + 0.2 V; used for threshold comparison when reference is applied here |
| –IN | Inverting input | Accepts signals down to (V–) – 0.2 V; commonly used for sensed signal input in high-side monitoring |
| OUT | CMOS push-pull output | Drives high/low actively; sinks or sources up to 5 mA; compatible with 1.8-V, 3.3-V, and 5-V logic families |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond supply rails | ±200 mV overdrive tolerance enables direct sensing of signals outside supply domain (e.g., transducer outputs, AC-coupled waveforms) |
| Push-pull CMOS output | Eliminates external pull-up resistor, reducing standby current and PCB area - critical for always-on battery systems |
| 0.8 µA typical supply current | Enables multi-year operation on CR2032 coin cell in periodic wake-up architectures (e.g., environmental sensors waking every 10 s) |
| 6 µs propagation delay | Provides deterministic response for slow analog events (e.g., battery voltage sag detection, thermal trip points) without excessive latency |
| –40°C to +125°C operating range | Validated performance across automotive cabin, industrial enclosure, and outdoor medical device environments |
Applications
| Portable Medical Sensors | Wireless Security Peripherals |
|---|---|
Use Scenario: Detecting electrode contact integrity in ECG patches via impedance threshold crossing. IC Role / Device Role / Timing Role: Comparator compares filtered electrode signal against precision reference to assert "good contact" flag. Use Value: Ultra-low IQ extends patch battery life beyond 7 days; rail-to-rail input accommodates ±100 mV AC-coupled bio-signal swing without level-shifting. | Use Scenario: Monitoring tamper switch closure in battery-powered door/window sensors. IC Role / Device Role / Timing Role: TLV3491AIDBVR acts as low-power window detector triggering alarm when switch opens/closes. Use Value: Push-pull output directly drives RF transceiver enable line; 0.8 µA IQ ensures >5-year shelf life on AA batteries. |
| Handheld Test Instruments | Ultra-Low Power Industrial Nodes |
Use Scenario: Battery voltage monitoring in multimeters to warn of low charge before measurement accuracy degrades. IC Role / Device Role / Timing Role: Compares scaled battery voltage against internal reference to generate low-battery interrupt. Use Value: Operates down to 1.8 V supply, enabling accurate monitoring even during deep discharge; SOT-23-5 footprint fits tight front-panel PCB real estate. | Use Scenario: Threshold detection for solar-charged remote telemetry units in agricultural sensor networks. IC Role / Device Role / Timing Role: TLV3491AIDBVR triggers data transmission when battery reaches 4.0 V, indicating full charge from PV panel. Use Value: Input common-mode range beyond rails accepts direct connection to unregulated solar input; 125°C rating supports outdoor junction box mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701DBVR | Higher IQ (560 nA vs 800 nA), wider supply (2.5–16 V), open-drain output requiring pull-up | Suitable where higher supply voltage or bidirectional bus interface needed; not drop-in due to output topology and pinout mismatch | Select TLV3701DBVR only if system uses 5–12 V rails and requires wired-OR capability |
| MAX9021AUT+T | Similar IQ (1 µA), 1.6–5.5 V supply, push-pull output, but only 10 µs delay and ±5 mV offset | Better offset performance but slower response; different SOT-23-6 pinout (extra NC pin) and no guaranteed rail-to-rail input beyond rails | Choose MAX9021AUT+T when tighter offset spec is mandatory and 10 µs delay is acceptable |
Compared with TLV3491AIDBVR, TLV3701DBVR offers lower IQ but requires external pull-up and lacks rail-to-rail input extension, while MAX9021AUT+T provides better offset but sacrifices speed and verified beyond-rail input capability - making TLV3491AIDBVR optimal for ultra-low-power, rail-flexible, fast-enough threshold detection in space-constrained designs.
Availability
TLV3491AIDBVR is available at Aetrix Electronics and suitable for portable medical equipment, wireless security peripherals, and handheld test instruments requiring stable component supply across long production lifecycles.
Supply support for TLV3491AIDBVR 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 chain and low-power design.
The TLV349x product line was engineered specifically for battery-constrained, low-voltage applications - emphasizing nanopower operation, rail-to-rail functionality, and micro-package integration for wearables, IoT endpoints, and portable diagnostics.
FAQ
What is the maximum input overvoltage tolerance for TLV3491AIDBVR?
The TLV3491AIDBVR input pins tolerate voltages up to (V–) – 0.5 V and (V+) + 0.5 V per absolute maximum ratings. Internal ESD diodes conduct beyond ±500 mV relative to rails, so input current must be limited to ≤10 mA using series resistors - confirmed in Section 8.3.2 of the SBOS262E datasheet. This protects TLV3491AIDBVR in transient-overvoltage scenarios like hot-plug or sensor cable disconnect.
Does TLV3491AIDBVR support true rail-to-rail input operation?
Yes, TLV3491AIDBVR supports input common-mode voltage from (V–) – 0.2 V to (V+) + 0.2 V, explicitly exceeding both supply rails by 200 mV. This is verified in Section 7.3 (Recommended Operating Conditions) and Figure 10 of the SBOS262E datasheet, enabling direct interface to AC-coupled signals or transducers with bipolar output swing without level-shifting circuitry.
Can TLV3491AIDBVR drive an LED directly?
No, TLV3491AIDBVR cannot drive an LED directly. Its output is rated for 5 mA sink/source into resistive loads, but forward voltage of standard LEDs (1.8–3.3 V) exceeds the VOH/VOL headroom (≤200 mV from rail at 5 mA). Driving an LED would require external transistor buffering or current-limiting resistor + logic-level LED - TLV3491AIDBVR is intended for signal-level logic interfacing, not power actuation.
Is external hysteresis required when using TLV3491AIDBVR?
External hysteresis is recommended for noisy input signals. The TLV3491AIDBVR has ±15 mV max input offset, meaning noise within that band causes multiple output transitions. Section 8.3.4 of SBOS262E specifies adding positive feedback (e.g., resistor divider from OUT to +IN) to create hysteresis - essential for reliable switching in EMI-prone environments like motor-driven medical pumps or wireless sensor enclosures.
What decoupling capacitors are required for stable operation of TLV3491AIDBVR?
Per Section 11.1 Layout Guidelines in SBOS262E, TLV3491AIDBVR requires a 0.01 µF ceramic capacitor in parallel with a 10 µF electrolytic capacitor between V+ and V–. The 0.01 µF part must be placed as close as possible to the V+ pin, and a solid ground plane is mandatory to suppress supply noise - failure to follow this causes erratic output behavior, especially under dynamic load conditions.
TLV3491AIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 15mV @ 5.5V
- Voltage - Input Offset (Max):
- 10pA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 1.2µA
- Current - Quiescent (Max):
- 74dB CMRR, 69.12dB PSRR
- CMRR, PSRR (Typ):
- 13.5µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TLV3491AIDBVR FAQ
1.How can I place an order for TLV3491AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV3491AIDBVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLV3491AIDBVR reliable?
The price and inventory of TLV3491AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV3491AIDBVR is usually 5 days.
3.What payment methods are accepted for TLV3491AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV3491AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV3491AIDBVR?
TLV3491AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV3491AIDBVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLV3491AIDBVR?
For technical support, including TLV3491AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV3491AIDBVR requirements.
6.How does Aetrix verify that TLV3491AIDBVR is sourced from the original manufacturer or authorized distributors?
All TLV3491AIDBVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLV3491AIDBVR meets industry standards.
7.What is the process for return or replacement of TLV3491AIDBVR?
All TLV3491AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TLV3491AIDBVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLV3491AIDBVR part is unused and in its original packaging.
Return procedure for TLV3491AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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