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Texas Instruments LMV7291MGX
- Part No.:
- LMV7291MGX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV7291MGX.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
LMV7291MGX 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 LMV7291MGX datasheet, LMV7291MGX pinout, LMV7291MGX application, or LMV7291MGX equivalent, this page delivers verified electrical parameters, SC70-5 package layout, real-world use cases, and validated alternative comparators for space-constrained, sub-2V systems requiring stable response and minimal quiescent current.
Technical Context
The LMV7291MGX employs a dual-input-stage BiCMOS architecture-paralleling PNP and NPN differential pairs-to achieve rail-to-rail input common-mode range (−0.1 V to VCC + 0.1 V) across 1.8 V to 5 V supplies. Its crossover point near 950 mV below VCC necessitates VCM placement away from that region to avoid offset voltage discontinuity.
It integrates a push-pull CMOS output stage enabling rail-to-rail swing with no external pull-up, while minimizing static power draw. Shoot-through current during output transitions mandates local 0.1 µF ceramic bypassing at VCC/GND pins to suppress supply glitches and ensure stability in noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.0 V - supports direct integration into Li-ion, coin-cell, and multi-rail embedded systems without level-shifting. |
| Supply Current (Typ) | 9 µA at 1.8 V - enables >10-year battery life in always-on wake-up comparators for IoT endpoints. |
| Propagation Delay | 880 ns (tPHL, 20 mV overdrive, 1.8 V) - sufficient for 1 MHz window detection in power sequencing and ADC trigger circuits. |
| Input Offset Voltage (Max) | 4 mV - ensures reliable 10 mV-level threshold discrimination in precision voltage monitors. |
| Input Common-Mode Range | −0.1 V to VCC + 0.1 V - allows direct sensing of signals at ground or near-VCC, e.g., battery undervoltage lockout at 0 V reference. |
| Output Type | Push-pull CMOS - eliminates need for external pull-up resistors, reducing BOM count and board area in portable designs. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade deployment in automotive cabin modules and handheld medical devices. |
Pinout & Package
LMV7291MGX is housed in a 5-pin SC70 (DCK) package - 2.0 mm × 1.25 mm footprint, 0.65 mm pitch - optimized for high-density PCB layouts in wearables and compact sensor nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | CMOS push-pull output capable of sourcing/sinking ≥0.5 mA while maintaining VOL ≤70 mV and VOH ≥1.7 V at 1.8 V supply. |
| 2 (–IN) | Inverting Input | Differential input node with 10 nA bias current and 200 pA offset current - compatible with high-impedance resistor dividers and capacitive sensors. |
| 3 (GND) | Ground Reference | Primary return path for supply and signal currents; requires low-inductance connection to solid ground plane to minimize switching noise coupling. |
| 4 (+IN) | Non-inverting Input | Differential input node matching –IN in bias/offset specs; used for active-high threshold detection when referenced to stable VREF. |
| 5 (V+) | Positive Supply | Single-supply input accepting 1.8–5.0 V; must be decoupled with 0.1 µF ceramic capacitor placed within 2 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Operates with inputs down to −0.1 V and up to VCC + 0.1 V - enables direct interface to 0 V-referenced battery terminals and VCC-referenced analog rails. |
| Ultra-low quiescent current | 9 µA typical at 1.8 V - reduces system standby power by >50% versus comparable comparators like TLV3701, extending shelf life of sealed devices. |
| Low input offset drift | 10 µV/°C - maintains <100 µV total offset shift over −40°C to +85°C, critical for temperature-stable voltage supervisors. |
| Push-pull output architecture | No external pull-up required - saves PCB area and eliminates I²R losses in high-duty-cycle alert signaling (e.g., smoke detector alarms). |
| SC70-5 package compatibility | Pin-compatible with industry-standard 5-pin SC70 footprints - allows drop-in replacement in existing space-constrained layouts without redesign. |
Applications
| Battery Voltage Monitor | Low-Power Wake-Up Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during deep sleep mode to trigger wake-up before cutoff (e.g., 2.8 V threshold). IC Role / Device Role / Timing Role: Threshold comparator comparing divided battery voltage against internal or external reference. Use Value: 9 µA supply current extends system sleep duration; rail-to-rail input enables accurate measurement down to 0 V discharge tail. |
Use Scenario: Detecting motion-triggered analog signal from MEMS accelerometer to wake MCU from STOP mode. IC Role / Device Role / Timing Role: Fast-response comparator converting analog acceleration peaks into clean digital interrupt pulses. Use Value: 880 ns propagation delay ensures sub-microsecond wake latency; push-pull output drives MCU GPIO directly without pull-up. |
| USB-C Power Delivery Supervisor | Medical Sensor Signal Conditioning |
|
Use Scenario: Validating VBUS presence and overvoltage condition (5.5 V clamp) during USB-C port negotiation. IC Role / Device Role / Timing Role: Dual-threshold comparator implementing UVLO/OVP protection logic with hysteresis. Use Value: 4 mV max VOS ensures ±2.5 mV accuracy on 5 V thresholds; SC70 package fits alongside USB-C connector routing. |
Use Scenario: Converting amplified ECG electrode signal into digital heartbeat markers for low-power data logging. IC Role / Device Role / Timing Role: Precision zero-crossing detector with adjustable hysteresis to reject 50/60 Hz interference. Use Value: 10 nA input bias current prevents DC error in high-Z electrode paths; rail-to-rail input accommodates bipolar signal swing around reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701IDBVR | Higher supply current (1.8 µA min, but 17 µA typ at 1.8 V); 1.2 µs propagation delay; same SC70-5 package. | Less suitable for multi-year battery life; acceptable where 300 ns slower response is tolerable. | Choose TLV3701IDBVR only if higher drive strength (16 mA sink/source) or wider temp range (−55°C to +125°C) is required. |
| NCS2200SN2T1G | Open-drain output; 1 µA supply current; 3 µs propagation delay; SOT-23-5 package (pinout differs). | Requires external pull-up; unsuitable for push-pull timing-critical paths; larger footprint than SC70. | Select NCS2200SN2T1G only when open-drain logic interfacing (e.g., I²C bus arbitration) or ultra-low-IQ dominates design priorities. |
Compared with TLV3701IDBVR and NCS2200SN2T1G, the LMV7291MGX uniquely balances sub-1 µA-class quiescent current, sub-1 µs speed, rail-to-rail input, and true push-pull output in the smallest SC70-5 footprint - making it optimal for miniaturized, long-life, single-supply systems where every nanoamp and nanosecond matters.
Availability
LMV7291MGX is available at Aetrix Electronics and suitable for battery voltage monitoring, low-power wake-up detection, USB-C power supervision, and medical sensor conditioning requiring stable component supply across industrial, portable, and connected-device programs.
Supply support for LMV7291MGX 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 LMV7291MGX belongs to TI's LMV low-voltage analog portfolio, engineered specifically for energy-constrained applications demanding rail-to-rail performance, nanoamp quiescent current, and robust operation down to 1.8 V supply.
FAQ
What is the maximum supply voltage rating for the LMV7291MGX?
The LMV7291MGX has an absolute maximum supply voltage (V+ − V−) of 5.5 V. Operation beyond this limit risks permanent damage. The device is fully characterized and specified from 1.8 V to 5.0 V, with key parameters like propagation delay and output swing validated across that full range. Always observe the 5.5 V absolute maximum to ensure reliability in transient-overvoltage conditions.
Does the LMV7291MGX support rail-to-rail input at 1.8 V supply?
Yes, the LMV7291MGX supports rail-to-rail input operation at 1.8 V supply, with an input common-mode voltage range from −0.1 V to VCC + 0.1 V (i.e., −0.1 V to 1.9 V). This is achieved via paralleled PNP/NPN input stages, enabling direct interface to ground-referenced signals and VCC-referenced references without attenuation or level-shifting circuitry.
What is the typical propagation delay of the LMV7291MGX at 1.8 V?
The LMV7291MGX exhibits a typical propagation delay of 880 ns (tPHL) and 1100 ns (tPLH) at 1.8 V supply with 20 mV input overdrive and 50 pF//5 kΩ load. These values are measured under standard test conditions (TA = 25°C) and represent the dominant timing constraint for threshold detection in low-voltage microcontroller wake-up and power sequencing applications.
Can the LMV7291MGX drive capacitive loads directly?
The LMV7291MGX push-pull output can drive moderate capacitive loads (≤50 pF) without external compensation, as confirmed in its AC characterization. For loads exceeding 50 pF - such as long PCB traces or multiple gate inputs - series resistance (10–100 Ω) should be added at the output to prevent ringing and ensure monotonic transitions, per TI's application guidance in SNOSA86E.
Is the LMV7291MGX pin-compatible with other SC70-5 comparators?
The LMV7291MGX uses the standard 5-pin SC70 (DCK) pinout: Pin 1 = OUT, Pin 2 = –IN, Pin 3 = GND, Pin 4 = +IN, Pin 5 = V+. This matches TI's TLV3701IDBVR and several industry-standard comparators, enabling mechanical compatibility. However, functional differences (e.g., open-drain vs. push-pull, supply current, delay) require schematic verification before substitution.
LMV7291MGX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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 ~ 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
LMV7291MGX FAQ
1.How can I place an order for LMV7291MGX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV7291MGX 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 LMV7291MGX reliable?
The price and inventory of LMV7291MGX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV7291MGX is usually 5 days.
3.What payment methods are accepted for LMV7291MGX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV7291MGX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV7291MGX?
LMV7291MGX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV7291MGX 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 LMV7291MGX?
For technical support, including LMV7291MGX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV7291MGX requirements.
6.How does Aetrix verify that LMV7291MGX is sourced from the original manufacturer or authorized distributors?
All LMV7291MGX 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 LMV7291MGX meets industry standards.
7.What is the process for return or replacement of LMV7291MGX?
All LMV7291MGX units undergo pre-shipment inspection (PSI). If there is an issue with LMV7291MGX, 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 LMV7291MGX part is unused and in its original packaging.
Return procedure for LMV7291MGX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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