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Texas Instruments LMV7291MG/NOPB
- Part No.:
- LMV7291MG/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV7291MG/NOPB.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,372
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Product details
Overview
LMV7291MG/NOPB from Texas Instruments is a single-channel rail-to-rail input comparator optimized for ultra-low-power, low-voltage operation at 1.8 V supply, delivering 880 ns propagation delay (20 mV overdrive), 9 µA supply current, and 4 mV max input offset voltage. It serves as a precision threshold detector in battery-powered sensor interfaces and power monitoring circuits.
For engineers reviewing the LMV7291MG/NOPB datasheet, LMV7291MG/NOPB pinout, LMV7291MG/NOPB application, or LMV7291MG/NOPB equivalent, key selection criteria include its SC70-5 package footprint, push-pull output stage enabling direct logic interfacing without pull-up resistors, and guaranteed operation down to 1.8 V with rail-to-rail input common-mode range extending 0.1 V beyond rails.
Technical Context
The LMV7291MG/NOPB employs a dual-input-stage BiCMOS architecture-paralleling PNP and NPN differential pairs-to achieve rail-to-rail input operation across −0.1 V to VCC + 0.1 V. Its crossover point occurs near 950 mV below VCC, requiring design attention to avoid VOS discontinuity in critical sensing regions.
It features a CMOS push-pull output stage delivering VOH ≥ 1.7 V and VOL ≤ 70 mV at 0.5 mA load under 1.8 V supply, eliminating external pull-up components and minimizing system-level quiescent power. Input bias current remains stable at 10 nA across temperature, supporting high-impedance source applications such as battery voltage dividers and thermistor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V - Enables direct integration into 1.8 V, 2.7 V, and 3.3 V systems without level-shifting. |
| Supply Current (Typ) | 9 µA at 1.8 V - Supports multi-year operation in coin-cell–powered IoT endpoints and wearables. |
| Propagation Delay | 880 ns (tPHL, 20 mV overdrive, 1.8 V) - Sufficient speed for battery fuel gauging, power-good assertion, and wake-up event detection. |
| Input Offset Voltage (Max) | 4 mV - Ensures reliable 10–20 mV hysteresis implementation in low-voltage brown-out detectors. |
| Input Common-Mode Range | −0.1 V to VCC + 0.1 V - Allows direct sensing of signals referenced to ground or VCC, e.g., Li-ion cell voltage monitoring. |
| Output Type | Push-pull CMOS - Drives TTL/CMOS loads directly; no external pull-up required, reducing BOM count and board area. |
| Operating Temperature | −40°C to +85°C - Qualified for industrial and portable consumer environments including laptops and medical sensors. |
Pinout & Package
LMV7291MG/NOPB is housed in a 5-pin SC70 (DCK) package - 2.0 mm × 1.25 mm, 0.65 mm pitch - optimized for space-constrained PCB layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive Supply Rail | Accepts 1.8 V to 5.5 V; bypass with 0.1 µF ceramic capacitor adjacent to pin for noise immunity. |
| 2 - IN− | Inverting Input | Differential input node; supports rail-to-rail common-mode range; high-impedance (10 nA bias current). |
| 3 - IN+ | Non-inverting Input | Differential input node; identical electrical characteristics to IN−; used for reference or signal routing flexibility. |
| 4 - GND | Ground Reference | Return path for supply and output; requires low-inductance connection to solid ground plane. |
| 5 - OUT | Push-Pull Output | CMOS-compatible digital output; sinks up to 6 mA / sources up to 6 mA at 1.8 V; no external pull-up needed. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Operates with inputs from −0.1 V to VCC + 0.1 V - enables direct sensing of ground-referenced battery voltages or rail-sampled signals. |
| Ultra-low 9 µA supply current | Reduces average system power by >90% vs. standard comparators - critical for always-on wake-up circuits and energy-harvesting nodes. |
| Push-pull CMOS output | Eliminates need for external pull-up resistor - saves PCB area, reduces component count, and avoids I²R losses in low-voltage domains. |
| Low input offset drift (10 µV/°C) | Maintains threshold accuracy across temperature - essential for precision battery end-of-discharge detection in portable devices. |
| SC70-5 package (2.0 × 1.25 mm) | Minimizes footprint by >50% vs. SOT-23-5 - supports high-density designs in smartphones, hearing aids, and compact sensor modules. |
Applications
| Battery Voltage Monitoring | Power-Good Detection |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during discharge to trigger low-battery warning or graceful shutdown. IC Role / Device Role / Timing Role: Threshold comparator comparing divided cell voltage against a stable reference. Use Value: 4 mV VOS max ensures ±20 mV detection window accuracy; 9 µA quiescent current extends runtime between charges. |
Use Scenario: Validating regulated 1.8 V or 3.3 V supply stability before enabling MCU or memory subsystems. IC Role / Device Role / Timing Role: Power supervisor asserting "PGOOD" signal after supply settles within tolerance. Use Value: 880 ns propagation delay enables fast fault response; rail-to-rail input allows direct sensing without level shifters. |
| Portable Sensor Wake-Up | Capacitive Touch Threshold Detection |
|
Use Scenario: Detecting motion-triggered analog sensor output crossing a preset threshold to wake an MCU from deep sleep. IC Role / Device Role / Timing Role: Low-power analog front-end comparator driving interrupt line to microcontroller. Use Value: 10 nA input bias current prevents loading of high-impedance MEMS or piezoelectric sensor outputs. |
Use Scenario: Converting small capacitance delta (e.g., finger proximity) into clean digital edge for touch controller input. IC Role / Device Role / Timing Role: Signal conditioning comparator with hysteresis rejecting noise on capacitive sense lines. Use Value: 200 pA input offset current minimizes baseline drift; SC70 package fits tight bezel spaces in mobile displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDCKR | Lower 320 ns propagation delay at 1.8 V but higher 15 µA supply current; same SC70-5 package. | Better suited for faster wake-up timing-critical systems where 6 µA extra current is acceptable. | Select TLV3691IDCKR when propagation delay < 400 ns is mandatory and supply current budget allows +6 µA. |
| MAX9021AXK+T | Higher 1.5 µA supply current, 5 mV VOS max, and SOT-23-5 package (larger than SC70); no rail-to-rail input. | Requires external level-shifting for ground-referenced inputs; less suitable for sub-2 V battery monitoring. | Choose MAX9021AXK+T only if legacy SOT-23 layout reuse is required and rail-to-rail input is not needed. |
Compared with TLV3691IDCKR and MAX9021AXK+T, LMV7291MG/NOPB delivers the lowest supply current (9 µA) in the smallest footprint (SC70-5) while maintaining rail-to-rail input capability - making it optimal for space- and energy-constrained battery-operated systems where moderate speed suffices.
Availability
LMV7291MG/NOPB is available at Aetrix Electronics and suitable for battery voltage monitoring, power-good detection, and portable sensor wake-up applications requiring stable component supply across industrial and consumer production cycles.
Supply support for LMV7291MG/NOPB 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 LMV7291MG/NOPB belongs to TI's LMV low-voltage analog portfolio, engineered specifically for energy-efficient, space-constrained applications in portable electronics, wearables, and battery management systems.
FAQ
What is the minimum operating supply voltage for LMV7291MG/NOPB?
The LMV7291MG/NOPB is fully specified and functional down to 1.8 V supply voltage, with guaranteed performance including 880 ns propagation delay, 9 µA supply current, and rail-to-rail input operation. Operation below 1.8 V is not characterized and may result in degraded parameters or undefined behavior. The absolute maximum rating is 5.5 V, and the device is not rated for operation above that limit.
Does LMV7291MG/NOPB support rail-to-rail input, and what does that mean for my circuit?
Yes, LMV7291MG/NOPB supports rail-to-rail input with a common-mode range from −0.1 V to VCC + 0.1 V. This means it can accurately compare signals referenced to ground (e.g., battery voltage dividers) or to VCC (e.g., supply margining) without external level-shifting circuitry. However, VOS varies near the input stage crossover point (~950 mV below VCC), so design margins should avoid that region for precision thresholds.
Can LMV7291MG/NOPB drive a standard CMOS logic input directly?
Yes, LMV7291MG/NOPB features a push-pull CMOS output capable of sourcing/sinking up to 6 mA at 1.8 V, producing VOH ≥ 1.7 V and VOL ≤ 70 mV under 0.5 mA load. This meets standard 1.8 V CMOS logic thresholds (VIH ≥ 1.35 V, VIL ≤ 0.45 V), allowing direct interface without pull-up resistors - reducing component count and board area in space-sensitive designs.
What is the recommended power supply decoupling for LMV7291MG/NOPB?
TI recommends placing a 0.1 µF ceramic capacitor between V+ and GND, mounted as close as possible to pins 1 and 4 of LMV7291MG/NOPB. For systems with shared supply rails, add a bulk 6.8 µF or larger tantalum capacitor at the board-level supply entry point. This dual-stage decoupling suppresses shoot-through current transients from the push-pull output and maintains stable V+ during fast output transitions.
Is LMV7291MG/NOPB pin-compatible with other SC70-5 comparators like TLV3691 or MAX9021?
No, LMV7291MG/NOPB is not pin-compatible with TLV3691IDCKR or MAX9021AXK+T. While all three use SC70-5 packages, their pin assignments differ: LMV7291MG/NOPB uses Pin 1=V+, Pin 2=IN−, Pin 3=IN+, Pin 4=GND, Pin 5=OUT; TLV3691 uses Pin 1=OUT, Pin 2=GND, Pin 3=IN−, Pin 4=IN+, Pin 5=V+; MAX9021 uses Pin 1=OUT, Pin 2=IN−, Pin 3=IN+, Pin 4=GND, Pin 5=V+. PCB layout must be verified per each device's datasheet.
LMV7291MG/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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 ~ 5V, ±0.9V ~ 2.5V
- :
- 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):
- 1.8µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SC-70-5
LMV7291MG/NOPB FAQ
1.How can I place an order for LMV7291MG/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV7291MG/NOPB 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 LMV7291MG/NOPB reliable?
The price and inventory of LMV7291MG/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV7291MG/NOPB is usually 5 days.
3.What payment methods are accepted for LMV7291MG/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV7291MG/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV7291MG/NOPB?
LMV7291MG/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV7291MG/NOPB 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 LMV7291MG/NOPB?
For technical support, including LMV7291MG/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV7291MG/NOPB requirements.
6.How does Aetrix verify that LMV7291MG/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV7291MG/NOPB 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 LMV7291MG/NOPB meets industry standards.
7.What is the process for return or replacement of LMV7291MG/NOPB?
All LMV7291MG/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV7291MG/NOPB, 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 LMV7291MG/NOPB part is unused and in its original packaging.
Return procedure for LMV7291MG/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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