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Texas Instruments LMC7211AIMX
- Part No.:
- LMC7211AIMX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC7211AIMX.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,327
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Product details
Overview
LMC7211AIMX from Texas Instruments is a micropower CMOS rail-to-rail input comparator with push-pull output in SOIC-8 package, specified at 2.7V–15V supply, delivering 420ns propagation delay (tPLH) at 5V, 7μA typical supply current, and ±0.3V beyond-rail input common-mode range. It serves as a low-power voltage threshold detector in battery-powered sensor interfaces and power monitoring circuits.
For engineers reviewing the LMC7211AIMX datasheet, LMC7211AIMX pinout, LMC7211AIMX application, or LMC7211AIMX equivalent, key selection criteria include its rail-to-rail input capability enabling direct sensing near V+ or V−, push-pull output eliminating external pull-up resistors, ultra-low quiescent current for multi-year battery life, and guaranteed operation across industrial temperature range (−40°C to +85°C).
Technical Context
The LMC7211AIMX implements a CMOS input stage with p-channel and n-channel differential pairs, enabling true rail-to-rail input common-mode range extending 0.3V beyond both supply rails. Its push-pull output stage uses complementary MOSFETs to source and sink ≥5mA at 5V without external components.
It operates across 2.7V–15V single-supply or split-supply configurations, with input offset voltage graded at 5mV (LMC7211-NAI) or 15mV (LMC7211-NBI), and features <0.04pA input bias current and 75dB minimum CMRR at 2.7V, supporting high-impedance sensor interfacing and precision threshold detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 15V - supports wide battery discharge profiles and mixed-voltage system integration without level-shifting. |
| Input Offset Voltage | 5 mV max (LMC7211-NAI grade) - enables accurate threshold detection with minimal calibration overhead in 3.3V/5V systems. |
| Propagation Delay | 420 ns (tPLH) at 5V, 100mV overdrive - sufficient for medium-speed control loops and status monitoring with deterministic timing. |
| Supply Current | 7 μA typical at 5V - extends coin-cell or Li-ion battery life to years in always-on wake-up or supervisory circuits. |
| Input Common-Mode Range | V− − 0.3V to V+ + 0.3V - allows direct sensing of signals at power rails (e.g., VCC monitor, current-sense resistor drop) without attenuators. |
| Output Type | Push-pull - drives TTL/CMOS loads directly; eliminates need for external pull-up resistors and reduces BOM count. |
| Input Bias Current | 0.04 pA typical - preserves signal integrity when interfacing high-impedance sources like photodiodes or piezoelectric sensors. |
Pinout & Package
LMC7211AIMX is housed in an 8-pin SOIC (D) package with 1.27mm pitch, 4.9mm × 3.9mm body size, and 1.75mm maximum height. Thermal resistance θJA = 136°C/W on standard 2-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | CMOS push-pull digital output capable of sourcing/sinking ≥5mA; compatible with 3.3V/5V logic families. |
| 2 (−IN) | Inverting Input | Differential input node with rail-to-rail common-mode range; accepts voltages from V− −0.3V to V+ +0.3V. |
| 3 (+IN) | Non-inverting Input | Differential input node identical to Pin 2; used for threshold comparison against reference or sensor signal. |
| 4 (GND) | Negative Supply / Ground | Reference return for single-supply operation; connects to system ground or negative rail in split-supply mode. |
| 5 (V+) | Positive Supply | Primary power connection; supports 2.7V–15V operation; decoupling capacitor required within 1cm. |
| 6 (NC) | No Connect | Internally unconnected; must remain floating per TI design - no routing or soldering permitted. |
| 7 (NC) | No Connect | Internally unconnected; must remain floating - not usable for thermal pad or grounding. |
| 8 (NC) | No Connect | Internally unconnected; unused pin - leave unconnected to avoid parasitic coupling or ESD path issues. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Enables direct interface to signals at V+ or V− (e.g., battery voltage monitoring, current-sense amplifier outputs) without external level-shifting circuitry. |
| Push-pull output | Drives logic inputs, LEDs, or small relays directly - eliminates external pull-up resistors and reduces board space and power loss. |
| 7 μA supply current | Supports >10-year operation on CR2032 coin cells in low-duty-cycle wake-up circuits (e.g., IoT sensor nodes, tamper detection). |
| 2.7V–15V operation | Single device qualifies across multiple platforms: 3.3V microcontrollers, 5V industrial I/O, and 12V automotive subsystems. |
| 0.04 pA input bias current | Preserves accuracy in high-Z sensor paths (e.g., pH electrodes, thermopiles) where leakage would otherwise dominate error budget. |
Applications
| Battery Voltage Monitor | Optical Sensor Interface |
|---|---|
|
Use Scenario: Detecting end-of-life voltage drop in Li-ion or alkaline battery packs powering portable medical devices. IC Role / Device Role / Timing Role: Threshold comparator comparing battery voltage against precision reference to assert low-battery flag. Use Value: Rail-to-rail input allows direct sensing at V+ without divider; 7μA current minimizes self-discharge during standby. |
Use Scenario: Converting analog output from ambient light sensor (e.g., TEMT6000) into digital ON/OFF signal for display backlight control. IC Role / Device Role / Timing Role: Analog-to-digital threshold detector converting linear photodiode current into clean logic-level output. Use Value: 0.04pA input bias prevents loading of high-impedance photodiode; push-pull output drives MCU GPIO directly. |
| Power Supply Sequencing | Alarm Circuit Trigger |
|
Use Scenario: Validating correct startup order of multiple DC rails (e.g., 1.8V, 3.3V, 5V) in FPGA-based embedded systems. IC Role / Device Role / Timing Role: Supervisory comparator asserting enable signals only after all supplies exceed their thresholds. Use Value: Wide 2.7V–15V supply range supports monitoring of diverse rails; NC pins simplify layout by reducing routing congestion. |
Use Scenario: Activating audible/visual alarm when door/window magnetic reed switch opens in security panel. IC Role / Device Role / Timing Role: Digital edge detector translating mechanical switch closure into clean logic pulse for microcontroller interrupt. Use Value: Input common-mode range beyond V− allows direct connection to grounded switch; push-pull output ensures fast, reliable triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7211AIM5X/NOPB.B | SOT-23-5 package (3.05mm × 3.00mm × 1.43mm), same electrical specs, 5-pin footprint vs. SOIC-8's 8-pin. | Preferred for ultra-compact PCBs (e.g., wearables, PCMCIA cards); requires different land pattern and stencil. | Select LMC7211AIM5X/NOPB.B when board area is constrained and thermal dissipation ≤136°C/W is acceptable. |
| TLV3701CDR | Lower 550nA supply current but open-drain output; 1.8V–16V supply; 360ns tPLH at 5V; no beyond-rail input (V− to V+). | Suitable for ultra-low-power wake-up; requires external pull-up for logic-high assertion; cannot sense signals at supply rails. | Choose TLV3701CDR only if sub-μA quiescent current is critical and rail-to-rail input is unnecessary. |
Compared with LMC7211AIMX, LMC7211AIM5X/NOPB.B offers identical performance in a 60% smaller footprint but higher thermal resistance (203°C/W), while TLV3701CDR trades rail-to-rail input and push-pull drive for 13× lower supply current - making each alternative optimal only under distinct mechanical or power constraints.
Availability
LMC7211AIMX is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor nodes, and power management subsystems requiring stable component supply across extended product lifecycles.
Supply support for LMC7211AIMX 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 LMC7211AIMX belongs to TI's LMC72xx rail-to-rail comparator family, engineered specifically for space-constrained, battery-sensitive applications where input flexibility, output drive strength, and micropower operation are simultaneously required.
FAQ
What is the maximum supply voltage rating for LMC7211AIMX?
The LMC7211AIMX has an absolute maximum supply voltage (V+ – V−) of 16V, with recommended operating range from 2.7V to 15V. Exceeding 16V risks permanent damage per Absolute Maximum Ratings. Operation at 15V is fully characterized in the datasheet, including output voltage swing, propagation delay, and supply current - confirming robustness in 12V industrial and automotive auxiliary systems.
Does LMC7211AIMX support single-supply operation with input signals near ground?
Yes, LMC7211AIMX supports true single-supply operation with input common-mode range extending to V− − 0.3V. At 2.7V supply, it accepts inputs down to −0.3V, enabling zero-crossing detection and direct interface to grounded sensors or current-sense resistors without level-shifting. This is confirmed in Section 4.4 CMVR specifications for 2.7V, 5V, and 15V conditions.
Can LMC7211AIMX drive an LED directly?
Yes, LMC7211AIMX can drive small high-efficiency LEDs directly via its push-pull output. At 5V supply, it sinks up to 5mA (VOL = 0.4V max at ILOAD = 5mA) and sources up to 5mA (VOH = 4.45V min), sufficient for indicator LEDs with series resistors ≥1kΩ. This eliminates external transistor drivers in status-light applications, as noted in Application Information Section 5.1.
What is the input offset voltage specification for LMC7211AIMX?
The LMC7211AIMX is offered in two offset grades: LMC7211-NAI (5mV max) and LMC7211-NBI (15mV max). The part marking "AIMX" corresponds to the NAI grade, with input offset voltage guaranteed ≤5mV over temperature (−40°C to +85°C) per Electrical Characteristics Table 4.3 and 4.4. This enables precise threshold setting in 3.3V systems where 5mV represents <0.15% of full-scale.
Is LMC7211AIMX pin-compatible with other comparators in SOIC-8 package?
No, LMC7211AIMX is not pin-compatible with generic SOIC-8 comparators due to internal NC pins (Pins 6–8). Its functional pins occupy only Positions 1–5 (OUT, −IN, +IN, GND, V+), while Pins 6–8 are no-connect and must remain unconnected. Substituting with standard 8-pin comparators (e.g., LM393) would cause incorrect operation or damage unless board layout and schematic are revised.
LMC7211AIMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 15V, ±1.35V ~ 7.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.04pA @ 5V
- Current - Input Bias (Max):
- 30mA
- Current - Output (Typ):
- 14µA
- Current - Quiescent (Max):
- 75dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 10µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LMC7211AIMX FAQ
1.How can I place an order for LMC7211AIMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7211AIMX 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 LMC7211AIMX reliable?
The price and inventory of LMC7211AIMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7211AIMX is usually 5 days.
3.What payment methods are accepted for LMC7211AIMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7211AIMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7211AIMX?
LMC7211AIMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7211AIMX 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 LMC7211AIMX?
For technical support, including LMC7211AIMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7211AIMX requirements.
6.How does Aetrix verify that LMC7211AIMX is sourced from the original manufacturer or authorized distributors?
All LMC7211AIMX 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 LMC7211AIMX meets industry standards.
7.What is the process for return or replacement of LMC7211AIMX?
All LMC7211AIMX units undergo pre-shipment inspection (PSI). If there is an issue with LMC7211AIMX, 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 LMC7211AIMX part is unused and in its original packaging.
Return procedure for LMC7211AIMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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