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Texas Instruments LMV7271MF
- Part No.:
- LMV7271MF
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV7271MF.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,425
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Product details
Overview
LMV7271MF from Texas Instruments is a single-channel, rail-to-rail input, low-power comparator optimized for 1.8-V operation, delivering 9 µA supply current per channel, 880 ns propagation delay (20-mV overdrive), and −0.1 V to 1.9 V input common-mode range beyond rails. It features a push-pull output stage and is used in battery voltage monitoring and low-voltage threshold detection circuits.
For engineers reviewing the LMV7271MF datasheet, LMV7271MF pinout, LMV7271MF application, or LMV7271MF equivalent, this page provides verified technical context, package mapping, functional pin definitions, real-world use cases, and validated alternative options for space-constrained, ultra-low-power analog sensing designs.
Technical Context
The LMV7271MF employs a paralleled PNP/NPN bipolar input stage enabling rail-to-rail input operation from −0.1 V below V− to 0.1 V above V+, with crossover near 950 mV from V+. Its push-pull CMOS output delivers rail-to-rail swing without external pull-up, minimizing system power consumption.
It operates across 1.8 V to 5.5 V supply, supports −40°C to +85°C ambient, and achieves 46–78 dB CMRR and 55–80 dB PSRR. Input bias current is 10 nA, offset current 200 pA, and guaranteed input offset voltage ≤4 mV at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct integration into Li-ion, coin-cell, and multi-rail systems without level-shifting. |
| Supply Current | 9 µA typical at 1.8 V - allows continuous operation for years on small batteries in wearables and IoT sensors. |
| Propagation Delay | 880 ns at 20-mV overdrive (1.8 V) - supports fast response in power-good detection and overvoltage alarms. |
| Input Offset Voltage | ≤4 mV (max) - ensures reliable threshold detection within ±2 mV accuracy for 1.8-V reference-based monitoring. |
| Input Common-Mode Range | −0.1 V to 1.9 V at 1.8 V supply - permits sensing signals down to ground and up to V+ + 0.1 V, critical for battery end-of-discharge detection. |
| Output Type | Push-pull CMOS - eliminates need for external pull-up resistor, reducing BOM count and PCB area in compact layouts. |
| ESD Rating | ±2000 V HBM - meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
LMV7271MF is packaged in SC70-5 (1.25 mm × 2.00 mm) and SOT-23-5 (1.60 mm × 2.90 mm) variants; the MF suffix denotes SC70-5 package per TI's orderable addendum.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN | Noninverting Input | Accepts analog signal to be compared against reference; supports rail-to-rail common-mode range including sub-ground voltages. |
| GND | Negative Supply | Reference node for both supply and input/output; must be low-impedance for stable noise performance. |
| −IN | Inverting Input | Receives reference voltage or feedback signal; matched bias current minimizes offset drift in precision threshold applications. |
| VOUT | CMOS Push-Pull Output | Drives logic inputs directly; sinks/sours current without external components-ideal for interfacing with MCU GPIO or FPGA I/O banks. |
| V+ | Positive Supply | Single-supply input; accepts 1.8–5.5 V; bypass capacitor required between V+ and GND to suppress shoot-through current glitches. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Supports input signals from −0.1 V to V+ + 0.1 V, enabling accurate battery voltage monitoring down to 0 V and up to full supply. |
| Ultra-low 9-µA supply current | Reduces quiescent power to <17 nW at 1.8 V, extending operational lifetime in always-on sensor nodes and wearable health monitors. |
| 880-ns propagation delay (1.8 V) | Enables sub-microsecond response in power sequencing, brown-out detection, and fast fault interruption circuits. |
| Bipolar input + CMOS output | Combines low-noise bipolar front-end with rail-to-rail CMOS output swing-critical for high-SNR sensing in noisy portable environments. |
| Guaranteed 4-mV VOS max | Ensures consistent trip-point accuracy across temperature and process variation, simplifying calibration in production test. |
Applications
| Battery Voltage Monitoring | Low-Power Threshold Detection |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during discharge to trigger shutdown before deep depletion. IC Role / Device Role / Timing Role: Comparator compares cell voltage against 2.8-V reference; asserts digital flag when voltage drops below threshold. Use Value: −0.1 V to 1.9 V input range allows direct sensing of 0-V-referenced battery terminals; 9-µA current extends shelf life of backup power systems. | Use Scenario: Detecting wake-up events in motion-activated wearables using accelerometer output crossing zero. IC Role / Device Role / Timing Role: Zero-crossing detector with hysteresis converts analog AC-coupled motion signal into clean digital edge for MCU interrupt. Use Value: 880-ns delay ensures timely wake-up; rail-to-rail input accommodates signal swing centered at mid-supply or ground. |
| Power-Good Signaling | Overvoltage Protection |
Use Scenario: Validating stable 1.8-V LDO output before enabling downstream logic in portable SoC subsystems. IC Role / Device Role / Timing Role: Compares regulated rail against precision bandgap reference; drives enable line high only when voltage is within ±2% tolerance. Use Value: 4-mV max VOS and 46–78 dB CMRR ensure immunity to supply ripple and noise, preventing false power-good assertions. | Use Scenario: Safeguarding USB-powered peripherals by cutting power when input exceeds 5.5 V. IC Role / Device Role / Timing Role: High-side comparator monitors VBUS via resistive divider; triggers latch-off circuit upon overvoltage condition. Use Value: 5.5-V absolute max rating and 55–80 dB PSRR allow robust operation directly from unregulated input rails without attenuation-stage errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV7211DBVR | Lower 5.5-µA supply current but slower 1.5-µs propagation delay; open-drain output requires pull-up. | Suitable for ultra-low-power sleep-mode monitoring where speed is secondary; not drop-in due to open-drain vs. push-pull. | Select TLV7211DBVR only if <6-µA current dominates design priority and external pull-up is acceptable. |
| MAX9021AXK+T | Higher 20-µA supply current, 120-ns propagation delay, and −40°C to +125°C temp range; SC70-5 package. | Better for automotive under-hood or industrial control where speed and extended temperature matter more than quiescent current. | Choose MAX9021AXK+T when faster response and wider temperature range outweigh 2× higher current draw. |
Compared with TLV7211DBVR and MAX9021AXK+T, LMV7271MF uniquely balances sub-10-µA current, sub-µs speed, and push-pull output in SC70-making it optimal for consumer portable devices requiring minimal footprint and predictable drive capability without external components.
Availability
LMV7271MF is available at Aetrix Electronics and suitable for battery-powered electronics, wearable devices, and mobile phone power management requiring stable component supply across long-lifecycle consumer programs.
Supply support for LMV7271MF 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 LMV727x family was engineered specifically for ultra-low-voltage, space-constrained applications such as wearables and energy-harvesting sensors-prioritizing rail-to-rail input, nanoamp quiescent current, and SC70/SOT-23 packaging.
FAQ
What is the maximum supply voltage rating for LMV7271MF?
The LMV7271MF has an absolute maximum supply voltage rating of 6 V, as specified in Section 6.1 of the SNOSA56I datasheet. Operation beyond this limit risks permanent damage. For reliable long-term use, the recommended operating range is 1.8 V to 5.5 V, supporting compatibility with standard Li-ion, coin-cell, and regulated 3.3/5-V rails.
Does LMV7271MF support true rail-to-rail input, including below ground?
Yes, LMV7271MF supports input voltages from −0.1 V to V+ + 0.1 V, confirmed in Section 6.5 (1.8-V Electrical Characteristics) and Feature Description 7.3.1. This allows direct sensing of signals referenced to ground-even slightly negative transients-without level-shifting, making it ideal for battery end-of-discharge detection and zero-crossing applications.
What output configuration does LMV7271MF use, and how does it affect system design?
LMV7271MF uses a push-pull CMOS output stage, unlike open-drain comparators. This eliminates the need for an external pull-up resistor, reducing component count and PCB area. However, shoot-through current during switching requires proper local bypassing (e.g., 0.1-µF ceramic capacitor between V+ and GND) to prevent supply glitches, as detailed in Section 7.3.2.
Can LMV7271MF operate from a 1.8-V supply while driving a 3.3-V logic input?
No-LMV7271MF's push-pull output swings rail-to-rail between V− and V+, so at 1.8-V supply, VOH is ~1.74 V (min) and VOL is ~166 mV (max). To interface with 3.3-V logic, use the LMV7275 (open-drain variant) with external 3.3-V pull-up, or add a level-shifter. This limitation is inherent to its output architecture and confirmed in Table 6.5.
How does input offset voltage drift with temperature in LMV7271MF?
LMV7271MF exhibits a maximum input offset temperature drift (TC VOS) of 20 µV/°C, measured at VCM = 0.9 V and specified in Section 6.5. Over the full −40°C to +85°C operating range, total VOS shift remains within ±1.2 mV (20 µV/°C × 125°C), ensuring stable trip points in thermally varying environments like handheld devices.
LMV7271MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V, ±0.9V ~ 2.75V
- :
- 4mV @ 5V
- Voltage - Input Offset (Max):
- 0.01µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 14µA
- Current - Quiescent (Max):
- 78dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 2.1µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
LMV7271MF FAQ
1.How can I place an order for LMV7271MF through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV7271MF 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 LMV7271MF reliable?
The price and inventory of LMV7271MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV7271MF is usually 5 days.
3.What payment methods are accepted for LMV7271MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV7271MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV7271MF?
LMV7271MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV7271MF 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 LMV7271MF?
For technical support, including LMV7271MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV7271MF requirements.
6.How does Aetrix verify that LMV7271MF is sourced from the original manufacturer or authorized distributors?
All LMV7271MF 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 LMV7271MF meets industry standards.
7.What is the process for return or replacement of LMV7271MF?
All LMV7271MF units undergo pre-shipment inspection (PSI). If there is an issue with LMV7271MF, 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 LMV7271MF part is unused and in its original packaging.
Return procedure for LMV7271MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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