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Texas Instruments LMC7211AIM
- Part No.:
- LMC7211AIM
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC7211AIM.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,024
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Product details
Overview
LMC7211AIM from Texas Instruments is a micropower CMOS comparator with rail-to-rail input and push-pull output in an 8-pin SOIC package. It operates from 2.7V to 15V, draws only 7μA typical supply current at 5V, achieves 420ns propagation delay (low-to-high), and supports input common-mode voltage beyond both supply rails. It serves as a precision signal-level decision element in battery-powered sensor monitoring and power supply supervision circuits.
For engineers reviewing the LMC7211AIM datasheet, LMC7211AIM pinout, LMC7211AIM application, or LMC7211AIM equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the LMC7211AIM - not generic comparators or family-level abstractions.
Technical Context
The LMC7211AIM implements a rail-to-rail input stage using CMOS transistors, enabling valid operation with input signals extending 0.3V below V− and up to 0.3V above V+ across its full 2.7V–15V supply range. Its push-pull output stage sources up to 30mA and sinks up to 45mA, eliminating external pull-up resistors required by open-drain comparators.
It features two offset voltage grades (5mV and 15mV) and is characterized over −40°C to +85°C junction temperature. Input bias current is 0.04pA typical, common-mode rejection ratio is ≥75dB, and power supply rejection ratio is ≥80dB - all specified at 2.7V, 5V, and 15V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 15V - enables direct use in single-supply systems powered by Li-ion, alkaline, or regulated 5V/12V rails without level-shifting. |
| Supply Current (Typ) | 7μA at 5V - extends battery life in portable devices; allows continuous operation for years on coin-cell batteries in low-duty-cycle sensing. |
| Propagation Delay | 420ns (tPLH) at 5V, 100mV overdrive - supports fast threshold detection in timing-critical analog-to-digital decision paths. |
| Input Offset Voltage | 5mV max (LMC7211-NAI grade) - ensures accurate threshold comparison for signals ≥50mV without trimming or calibration. |
| Input Common-Mode Range | V− −0.3V to V+ +0.3V - permits direct sensing of signals near ground or supply rails, e.g., battery voltage monitoring or current-sense resistor outputs. |
| Output Type | Push-pull - drives TTL/CMOS logic directly, interfaces with LEDs or small relays without external components, and avoids bus contention issues. |
| Input Bias Current | 0.04pA typical - preserves signal integrity when interfacing high-impedance sensors (e.g., photodiodes, pH electrodes) without loading. |
Pinout & Package
LMC7211AIM uses an 8-pin SOIC (D) package with standard dual-in-line footprint (5.3mm × 6.2mm × 1.75mm height). Pin numbering follows TI's SOIC-8 top-view convention: Pin 1 = non-inverting input (+), Pin 2 = inverting input (−), Pin 3 = V− (GND or negative supply), Pin 4 = V+ (positive supply), Pin 5 = output, Pins 6–8 unused (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Non-inverting Input (+) | Accepts reference or signal to be compared against inverting input; rail-to-rail capable up to V+ +0.3V and down to V− −0.3V. |
| Pin 2 | Inverting Input (−) | Accepts monitored signal or threshold reference; identical rail-to-rail voltage range as Pin 1. |
| Pin 3 | V− (Ground/Negative Supply) | Return path for supply and inputs; must be connected to system ground or negative rail; defines lower common-mode limit. |
| Pin 4 | V+ (Positive Supply) | Main power connection; supports 2.7V–15V; sets upper common-mode limit and output swing ceiling. |
| Pin 5 | Output | Push-pull digital output sourcing up to 30mA or sinking up to 45mA; compatible with 3.3V/5V logic families without pull-ups. |
| Pins 6–8 | No Connect (NC) | Internally unconnected; must remain floating or grounded per layout best practices - no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Enables direct interface to signals at or beyond supply rails - eliminates need for input voltage dividers or level shifters in battery monitoring or sensor front-ends. |
| 7μA typical supply current | Reduces quiescent power to <35μW at 5V - critical for always-on wake-up comparators in IoT edge nodes and wearable health monitors. |
| Push-pull output | Drives logic gates, LEDs, or small loads directly - removes external pull-up resistor, saves board space, and prevents undefined states during power-up/down. |
| 0.04pA input bias current | Preserves accuracy in high-Z sensor circuits (e.g., capacitive touch, piezoelectric vibration sensors) where leakage would distort thresholds. |
| Specified at 2.7V, 5V, and 15V | Guarantees performance across full battery discharge curve (e.g., 3.7V → 2.7V Li-ion) and mixed-voltage system rails without derating assumptions. |
Applications
| Battery Voltage Monitoring | Optical Sensor Threshold Detection |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger under-voltage lockout or full-charge cutoff. IC Role / Device Role / Timing Role: Comparator comparing cell voltage against precision reference (e.g., 2.5V) to generate digital enable/disable signal for protection circuitry. Use Value: Rail-to-rail input accepts full 0–4.2V cell range; 7μA current minimizes self-discharge; push-pull output directly drives MOSFET gate or microcontroller interrupt pin. |
Use Scenario: Detecting presence/absence of light in smoke detectors or ambient light control for displays. IC Role / Device Role / Timing Role: Comparing photodiode or phototransistor output against adjustable threshold to produce clean ON/OFF logic output. Use Value: 0.04pA input bias avoids loading high-impedance photodiode; rail-to-rail input accommodates low-light signals near ground; fast 420ns response enables flicker-free detection. |
| PCMCIA Card Status Sensing | Power Supply Sequencing Supervision |
|
Use Scenario: Detecting insertion/removal of PCMCIA cards in legacy laptop expansion slots via mechanical switch or voltage presence. IC Role / Device Role / Timing Role: Level translator and debouncer converting card-detect switch closure into clean logic-level signal for host controller. Use Value: SOIC-8 package fits constrained card-edge layouts; 2.7V operation matches 3.3V I/O domains; NC pins simplify routing in dense connectors. |
Use Scenario: Validating correct power-up sequence of multiple rails (e.g., 12V → 5V → 3.3V) in industrial controllers before enabling FPGA or processor. IC Role / Device Role / Timing Role: Independent voltage monitor per rail, generating reset pulses only when all supplies reach target thresholds. Use Value: Wide 2.7–15V supply range covers all common rails; 5mV offset ensures tight tolerance on 3.3V/5V thresholds; push-pull output drives reset IC inputs directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7211AIM5X/NOPB | SOT-23-5 package (3.05mm × 3.00mm × 1.43mm), 5-pin, same electrical specs, different pinout (V+, Out, V−, In+, In−). | Used where board space is severely constrained (e.g., wearables, ultra-thin modules); requires PCB redesign due to different footprint and pin assignment. | Select LMC7211AIM5X/NOPB only when miniaturization outweighs layout reuse; SOIC version preferred for prototyping and serviceability. |
| TLV3701CDR | Lower 550nA supply current, 1.8–16V supply, rail-to-rail input, open-drain output, 360ns propagation delay, SOIC-8 package. | Requires external pull-up for logic-high output; better for ultra-low-power always-on sensing but incompatible with direct LED drive or bus-driving roles. | Choose TLV3701CDR when sub-1μA quiescent current is mandatory and output load is purely logic-input; avoid if push-pull drive or direct indicator control is needed. |
Compared with LMC7211AIM, LMC7211AIM5X/NOPB offers identical performance in a smaller footprint but demands new layout and lacks pin compatibility, while TLV3701CDR trades push-pull output for extreme low power - making it unsuitable for applications requiring active high-drive capability.
Availability
LMC7211AIM is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial power supervision systems requiring stable component supply across long production lifecycles.
Supply support for LMC7211AIM 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 delivering analog and embedded processing solutions, with decades of expertise in precision analog ICs, power management, and signal chain technologies.
The LMC7211AIM belongs to TI's LMC72xx rail-to-rail input comparator family, designed specifically for space-constrained, battery-sensitive applications where low power, wide supply range, and robust input voltage handling are essential - not general-purpose or high-speed comparator use cases.
FAQ
What is the maximum supply voltage rating for the LMC7211AIM?
The LMC7211AIM has an absolute maximum supply voltage (V+ – V−) of 16V. Its recommended operating range is 2.7V to 15V, with full electrical specifications guaranteed at 2.7V, 5V, and 15V. Exceeding 16V risks permanent damage per TI's Absolute Maximum Ratings table. Always observe derating guidelines for reliability at elevated temperatures.
Does the LMC7211AIM support rail-to-rail input operation?
Yes, the LMC7211AIM supports true rail-to-rail input operation: its common-mode input voltage range extends from V− −0.3V to V+ +0.3V. This allows direct comparison of signals at or slightly beyond the supply rails - critical for battery voltage monitoring and current-sense amplifier outputs without external level-shifting circuitry.
What is the typical supply current of the LMC7211AIM at 5V?
The LMC7211AIM draws 7μA typical supply current at 5V with output low, and 7μA typical with output high - confirmed in Section 4.3 and 4.4 of the datasheet. This ultra-low quiescent current enables multi-year operation on primary lithium cells in maintenance-free sensor nodes and portable diagnostic equipment.
Is the LMC7211AIM pin-compatible with the LMC7221?
No, the LMC7211AIM is not pin-compatible with the LMC7221. While both are single comparators in SOIC-8 packages, the LMC7221 features an open-drain output and different internal pin mapping (e.g., output on Pin 1 vs. Pin 5). Substituting them requires PCB layout changes and external pull-up resistor addition for the LMC7221.
What offset voltage grade does the LMC7211AIM correspond to?
The LMC7211AIM corresponds to the LMC7211-NAI grade, with a maximum input offset voltage of 5mV at 25°C (per Section 4.3 Electrical Characteristics). This grade is optimized for applications requiring tighter threshold accuracy, such as precision voltage supervisors and calibrated sensor interfaces where drift must remain below 10mV over temperature.
LMC7211AIM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- 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
LMC7211AIM FAQ
1.How can I place an order for LMC7211AIM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7211AIM 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 LMC7211AIM reliable?
The price and inventory of LMC7211AIM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7211AIM is usually 5 days.
3.What payment methods are accepted for LMC7211AIM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7211AIM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7211AIM?
LMC7211AIM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7211AIM 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 LMC7211AIM?
For technical support, including LMC7211AIM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7211AIM requirements.
6.How does Aetrix verify that LMC7211AIM is sourced from the original manufacturer or authorized distributors?
All LMC7211AIM 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 LMC7211AIM meets industry standards.
7.What is the process for return or replacement of LMC7211AIM?
All LMC7211AIM units undergo pre-shipment inspection (PSI). If there is an issue with LMC7211AIM, 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 LMC7211AIM part is unused and in its original packaging.
Return procedure for LMC7211AIM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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