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Texas Instruments TLV3491AIDG4
- Part No.:
- TLV3491AIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV3491AIDG4.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
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Product details
Overview
TLV3491AIDG4 from Texas Instruments is a single-channel, nanopower, rail-to-rail input/output comparator with push-pull CMOS output stage, 0.8 µA typical supply current, 1.8 V to 5.5 V operating voltage, and 6 µs propagation delay at 100 mV overdrive - used for ultra-low-power threshold detection in battery-powered sensor interfaces.
For engineers reviewing the TLV3491AIDG4 datasheet, TLV3491AIDG4 pinout, TLV3491AIDG4 application, or TLV3491AIDG4 equivalent, key selection criteria include quiescent current budget (<1 µA), input common-mode range extending 200 mV beyond rails, push-pull output drive capability (±5 mA), and SOT-23-5 package compatibility with space-constrained portable designs.
Technical Context
The TLV3491AIDG4 implements a fully differential input stage with ESD-protected inputs rated ±3000 V HBM and operates across –40°C to +125°C. Its push-pull output eliminates external pull-up resistors and avoids shoot-through current, enabling direct interfacing with CMOS logic or microcontroller GPIOs without level-shifting.
Input offset voltage is ±3 mV (typ), with ±15 mV max over temperature; common-mode rejection ratio is 60–74 dB depending on input range. The device supports stable operation down to 1.8 V, making it suitable for single-cell Li-ion or two-cell alkaline systems where supply headroom is minimal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V - enables direct use with single-cell Li-ion (3.0–3.7 V) or two-cell alkaline (2.4–3.2 V) batteries |
| Quiescent Current | 0.85 µA (typ) - extends battery life in always-on monitoring circuits (e.g., >10-year runtime on CR2032) |
| Propagation Delay | 6 µs (typ, 100 mV overdrive) - sufficient for low-frequency event detection (e.g., door open/close, battery low alert) |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - allows sensing signals below ground or above supply, critical for AC-coupled zero-crossing |
| Output Drive | Push-pull CMOS, VOH = 90 mV from rail (5 mA sink), VOL = 160 mV from rail (5 mA source) - drives logic inputs directly without pull-ups |
| Input Offset Voltage | ±3 mV (typ), ±15 mV (max) - defines minimum detectable signal difference without external trimming |
| ESD Rating | ±3000 V HBM - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
TLV3491AIDG4 is packaged in a 5-pin SOT-23 (DBV) with body size 2.90 mm × 1.60 mm, optimized for high-density PCB layouts in portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | CMOS push-pull output capable of sourcing/sinking ≥5 mA; compatible with 1.8-V to 5-V logic families |
| 2 - V– | Negative Supply | Lowest potential supply rail; must be connected to GND or negative reference in dual-supply configurations |
| 3 - +IN | Noninverting Input | High-impedance (±1 pA bias current) node for reference or signal comparison; accepts voltages up to V+ + 0.2 V |
| 4 - –IN | Inverting Input | High-impedance node for sensed signal; supports rail-to-rail common-mode range including sub-ground levels |
| 5 - V+ | Positive Supply | Highest potential supply rail; supplies internal bias and output stage; decoupling capacitor required per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply range in low-voltage systems (e.g., 1.8 V), eliminating need for external level shifters |
| 0.8 µA typical supply current | Reduces average power to <1.5 µW at 1.8 V - ideal for energy-harvesting or coin-cell-powered wake-up comparators |
| 200-mV beyond-rail input range | Supports AC-coupled inputs and ground-referenced sensors without clamping diodes or external bias networks |
| No external pull-up required | Push-pull output eliminates standby current through external resistors, simplifying BOM and improving noise immunity |
| –40°C to +125°C operation | Validated performance across automotive cabin, industrial control, and medical wearable environments |
Applications
| Portable Medical Sensors | Wireless Security Peripherals |
|---|---|
Use Scenario: Battery-powered pulse oximeter detecting LED current threshold crossing during photoplethysmography sampling. IC Role / Device Role / Timing Role: Threshold comparator triggering ADC capture window upon red/IR LED current deviation. Use Value: 0.8 µA quiescent current extends CR2032 battery life beyond 2 years; rail-to-rail input accommodates varying LED forward voltage across temperature. |
Use Scenario: Door/window contact sensor in Zigbee-enabled smart home hub detecting magnet proximity via reed switch closure. IC Role / Device Role / Timing Role: Low-power wake-up comparator asserting interrupt to MCU only on state change. Use Value: Push-pull output drives MCU GPIO directly; 200-mV beyond-rail input handles switch bounce-induced transients without clipping. |
| Handheld Test Instruments | Ultra-Low-Power IoT End Nodes |
Use Scenario: Pocket multimeter detecting continuity threshold (e.g., <50 Ω) using constant-current source and voltage sense. IC Role / Device Role / Timing Role: Precision comparator comparing sense voltage against reference to light continuity LED. Use Value: ±3 mV offset ensures accurate low-resistance detection; SOT-23-5 footprint minimizes board area in compact enclosure. |
Use Scenario: Soil moisture sensor node powered by solar harvester, waking every 15 minutes to compare capacitive probe voltage against dry/wet thresholds. IC Role / Device Role / Timing Role: Always-on comparator enabling duty-cycled MCU operation with sub-µA sleep current. Use Value: 1.8 V minimum supply allows direct connection to harvested energy storage capacitor; no LDO needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3491IDBVR | Same silicon, SOT-23-5 package, but with different tape-and-reel packaging and RoHS-compliant finish (no lead plating) | Identical electrical specs and pinout; preferred for new designs requiring lead-free compliance and automated assembly | Select TLV3491IDBVR for volume production with modern SMT lines; TLV3491AIDG4 remains valid for legacy inventory or specific qualification requirements |
| TLV7011DBVR | Lower quiescent current (350 nA typ), but open-drain output requiring external pull-up; 1.6 V min supply | Suitable where ultra-deep sleep dominates (e.g., >10-year battery life), but adds BOM cost and reduces noise immunity vs push-pull | Choose TLV7011DBVR only when sub-500 nA IQ is mandatory and system can tolerate open-drain limitations; TLV3491AIDG4 offers superior drive and simplicity |
Compared with TLV3491IDBVR, TLV3491AIDG4 shares identical functionality but differs in packaging specification and finish; compared with TLV7011DBVR, TLV3491AIDG4 trades 0.45 µA higher IQ for integrated push-pull drive, eliminating external components and improving transient response in event-triggered systems.
Availability
TLV3491AIDG4 is available at Aetrix Electronics and suitable for portable medical equipment, wireless security peripherals, and handheld test instruments requiring stable component supply with long-term lifecycle support.
Supply support for TLV3491AIDG4 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 TLV3491AIDG4 belongs to TI's nanopower comparator product line, engineered specifically for battery-operated and energy-constrained applications where supply current, rail-to-rail operation, and small footprint are primary constraints.
FAQ
What is the maximum operating temperature for TLV3491AIDG4?
The TLV3491AIDG4 is specified for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD22-A108 and supports deployment in automotive under-hood modules, industrial motor controls, and outdoor IoT sensors where thermal stress is significant. Thermal resistance (RθJA) is 237.8°C/W in SOT-23-5 package.
Does TLV3491AIDG4 require an external pull-up resistor on its output?
No, TLV3491AIDG4 features a push-pull CMOS output stage that actively drives both high and low states without external components. This eliminates standby current through pull-up resistors, reduces BOM count, and improves noise immunity compared to open-drain comparators. The output can directly interface with 1.8-V to 5-V logic inputs.
Can TLV3491AIDG4 operate from a single 1.8-V supply?
Yes, TLV3491AIDG4 is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, it maintains 0.85 µA typical quiescent current, 6 µs propagation delay (100 mV overdrive), and rail-to-rail input/output swing - making it ideal for single-cell LiFePO₄ or two-cell alkaline systems where supply headroom is minimal.
What is the input offset voltage specification for TLV3491AIDG4?
The TLV3491AIDG4 has a typical input offset voltage of ±3 mV and a maximum of ±15 mV over temperature (–40°C to +125°C). This defines the smallest differential input voltage reliably detectable without external trimming or calibration, critical for precision threshold detection in sensor front-ends.
Is TLV3491AIDG4 pin-compatible with other members of the TLV349x family?
No - TLV3491AIDG4 is a single-channel device in 5-pin SOT-23, while TLV3492 (dual) and TLV3494 (quad) use 8-pin and 14-pin packages respectively. Pin functions differ across channel count variants; only TLV3491 variants (e.g., TLV3491IDBVR) share identical pinout and footprint with TLV3491AIDG4.
TLV3491AIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
- :
- 8-SOIC
TLV3491AIDG4 FAQ
1.How can I place an order for TLV3491AIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV3491AIDG4 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 TLV3491AIDG4 reliable?
The price and inventory of TLV3491AIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV3491AIDG4 is usually 5 days.
3.What payment methods are accepted for TLV3491AIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV3491AIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV3491AIDG4?
TLV3491AIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV3491AIDG4 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 TLV3491AIDG4?
For technical support, including TLV3491AIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV3491AIDG4 requirements.
6.How does Aetrix verify that TLV3491AIDG4 is sourced from the original manufacturer or authorized distributors?
All TLV3491AIDG4 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 TLV3491AIDG4 meets industry standards.
7.What is the process for return or replacement of TLV3491AIDG4?
All TLV3491AIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLV3491AIDG4, 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 TLV3491AIDG4 part is unused and in its original packaging.
Return procedure for TLV3491AIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV3491AIDG4 Tags
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LM2903DR
Texas Instruments
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LM339DR
Texas Instruments
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LM339PWR
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LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
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LM239DR
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
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