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Texas Instruments LMC7221BIMX/NOPB
- Part No.:
- LMC7221BIMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC7221BIMX/NOPB.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,269
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Product details
Overview
LMC7221BIMX/NOPB from Texas Instruments is a micropower CMOS single comparator with rail-to-rail input, open-drain output, 5 mV max input offset voltage, 7 μA typical supply current at 5V, and 4 μs propagation delay (tPHL/tPLH) at 2.7V - deployed in battery-powered mixed-voltage sensor interface and power monitoring circuits.
For engineers reviewing the LMC7221BIMX/NOPB datasheet, LMC7221BIMX/NOPB pinout, LMC7221BIMX/NOPB application, or LMC7221BIMX/NOPB equivalent, this page delivers verified package mapping (SOIC-8), confirmed electrical specs across 2.7V–15V operation, validated rail-to-rail input behavior down to −0.3V below V−, and real-world design implications of its open-drain output for level translation.
Technical Context
The LMC7221BIMX/NOPB implements a CMOS input stage enabling rail-to-rail common-mode input range extending 0.3V beyond both supply rails, with guaranteed operation from −40°C to +85°C. Its open-drain output stage supports external pull-up to voltages up to 15V, independent of the comparator's own 2.7V–15V supply.
It features ultra-low input bias current (0.04 pA typ) and input offset voltage drift of 1.0 μV/°C, making it suitable for high-impedance sensor interfacing and precision threshold detection without front-end amplification. The device is characterized with 5 mV max VOS (BI grade) and 75 dB min CMRR at 2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 15V - supports single-supply operation across Li-ion, 3.3V, 5V, and 12V systems without level-shifting. |
| Input Offset Voltage (max) | 15 mV - ensures reliable switching with ≥20 mV signal overdrive in cost-sensitive industrial sensing. |
| Supply Current (typ) | 7 μA at 5V - extends battery life in portable devices; enables always-on monitoring with sub-10 μA quiescent draw. |
| Propagation Delay | 4 μs at 2.7V (100 mV overdrive) - sufficient for slow-speed threshold detection, power-good signaling, and LED drive control. |
| Input Common-Mode Range | V− − 0.3V to V+ + 0.3V - allows direct sensing of signals near ground or supply rails, eliminating need for input dividers in supply monitors. |
| Output Type | Open-drain - enables logic-level translation between domains (e.g., 5V comparator driving 3.3V MCU GPIO) via external pull-up. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin-ambient applications without derating. |
Pinout & Package
LMC7221BIMX/NOPB is packaged in an 8-pin SOIC (Package Drawing D, JEDEC MS-012AA), 3.91 mm × 4.90 mm body, 1.75 mm height, RoHS-compliant, with SN lead finish and moisture sensitivity level (MSL) 1 (unlimited floor life).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential input node accepting rail-to-rail common-mode signals; high-impedance (0.04 pA bias) for direct sensor connection. |
| 2 | Non-Inverting Input (+) | Differential input node with identical rail-to-rail range and impedance as Pin 1; used for reference or signal comparison. |
| 3 | Ground (V−) | Negative supply terminal; also serves as common reference for input common-mode range extension below ground. |
| 4 | Output | Open-drain NMOS drain - sinks current only; requires external pull-up resistor to define logic-high voltage and current limit. |
| 5 | NC | No connect - internally unconnected; must remain floating or tied to ground per layout best practice. |
| 6 | V+ | Positive supply terminal; accepts 2.7V–15V; powers internal circuitry and defines upper bound of input common-mode range. |
| 7 | NC | No connect - internally unconnected; must remain floating or tied to ground per layout best practice. |
| 8 | NC | No connect - internally unconnected; must remain floating or tied to ground per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Operates with inputs from V− − 0.3V to V+ + 0.3V - enables direct monitoring of supply rails or battery terminals without attenuation. |
| Ultra-low input bias current | 0.04 pA typical - preserves signal integrity when interfacing with high-impedance sources like thermistors or photodiodes. |
| Open-drain output with 15V tolerance | Output can be pulled up to 15V regardless of V+ - simplifies mixed-voltage I/O between 2.7V/3.3V/5V/12V subsystems. |
| Micropower operation | 7 μA supply current at 5V - reduces system-level power budget impact in always-on battery-backed circuits. |
| Guaranteed performance at 2.7V | Specified parameters (VOS, tPD, CMRR) validated at 2.7V - ensures reliability in low-voltage Li-ion and energy-harvesting designs. |
Applications
| Battery Voltage Monitor | Low-Power Sensor Threshold Detector |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Comparator compares cell voltage against a precision reference to trigger under-voltage lockout or full-charge indication. Use Value: Rail-to-rail input allows direct sensing down to 0V; 7 μA quiescent current minimizes battery drain during standby. |
Use Scenario: Detecting motion via piezoelectric sensor output crossing a fixed threshold in wireless IoT nodes. IC Role / Device Role / Timing Role: Converts analog sensor pulses into clean digital edges for microcontroller wake-up interrupt generation. Use Value: 0.04 pA input bias avoids loading high-Z sensor; open-drain output interfaces directly to MCU's 3.3V GPIO with 10 kΩ pull-up. |
| Mixed-Voltage Logic Interface | LED Indicator Driver |
Use Scenario: Level-shifting comparator output from a 5V analog subsystem to a 3.3V FPGA I/O bank. IC Role / Device Role / Timing Role: Acts as voltage-domain translator using external 3.3V pull-up on open-drain output. Use Value: Eliminates need for discrete level-shifters; 15V-tolerant output ensures robustness even if pull-up voltage exceeds V+. |
Use Scenario: Driving status LEDs in handheld test equipment powered by dual 3.3V/5V rails. IC Role / Device Role / Timing Role: Sinks LED current (≤5 mA) when triggered, with output low voltage ≤0.4V at 5 mA load. Use Value: Integrated open-drain driver reduces BOM count; 4 μs response time ensures visible blink timing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221AIMX/NOPB | Same SOIC-8 package and pinout; tighter 5 mV max VOS (AI grade vs. BI's 15 mV). | Better suited for precision thresholding where <10 mV error budget is required. | Select LMC7221AIMX/NOPB when offset-critical applications demand lower VOS; otherwise LMC7221BIMX/NOPB offers cost advantage. |
| TLV3701CDR | Push-pull output (no external pull-up needed); 1.8V–16V supply; 360 nA IQ; 350 ns tPD. | Higher speed and lower power, but lacks rail-to-rail input below V− and open-drain flexibility. | Choose TLV3701CDR for ultra-low-power, fast-response apps needing push-pull drive; retain LMC7221BIMX/NOPB for rail-to-rail input and mixed-voltage translation. |
Compared with LMC7221AIMX/NOPB, LMC7221BIMX/NOPB trades 10 mV higher offset for lower cost in non-precision contexts; versus TLV3701CDR, it sacrifices speed and quiescent current for guaranteed sub-ground input capability and open-drain interoperability across voltage domains.
Availability
LMC7221BIMX/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor nodes, and mixed-voltage power management systems requiring stable component supply across extended product lifecycles.
Supply support for LMC7221BIMX/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 delivering analog, embedded processing, and connectivity solutions with focus on reliability, longevity, and industrial-grade qualification.
The LMC7221 series was designed specifically for space-constrained, low-power analog-digital interface applications - emphasizing rail-to-rail input, micropower operation, and open-drain flexibility in portable and battery-operated systems.
FAQ
What is the maximum supply voltage rating for LMC7221BIMX/NOPB?
The absolute maximum supply voltage (V+ – V−) for LMC7221BIMX/NOPB is 16V, with recommended operating range from 2.7V to 15V. Exceeding 16V risks permanent damage. Electrical characteristics are fully specified at 2.7V, 5V, and 15V, ensuring predictable performance across common battery and rail voltages. LMC7221BIMX/NOPB maintains rail-to-rail input functionality and 75 dB CMRR within this range.
Does LMC7221BIMX/NOPB support true rail-to-rail input, including below ground?
Yes, LMC7221BIMX/NOPB guarantees input common-mode range from V− − 0.3V to V+ + 0.3V - meaning it accepts inputs 300 mV below ground (V−) when operating on single supply. This is validated in the datasheet for both 2.7V and 5V conditions and enables zero-crossing detection and direct battery-terminal sensing without level-shifting. LMC7221BIMX/NOPB achieves this via CMOS input architecture with enhanced ESD protection structures.
Can LMC7221BIMX/NOPB drive an LED directly?
Yes, LMC7221BIMX/NOPB can sink up to 5 mA with VOL ≤ 0.4V at 5V supply, making it suitable for driving low-current indicator LEDs. Use a series current-limiting resistor between the LED anode and V+ (e.g., 5V), and connect cathode to LMC7221BIMX/NOPB output (Pin 4). Ensure total sink current stays within 5 mA to maintain specified VOL. LMC7221BIMX/NOPB's open-drain structure naturally suits this configuration without additional components.
What is the input offset voltage specification for LMC7221BIMX/NOPB?
LMC7221BIMX/NOPB is the BI-grade variant with maximum input offset voltage (VOS) of 15 mV at 25°C, and 18 mV over full temperature range (−40°C to +85°C). Typical VOS is 3 mV. This grade balances cost and performance for non-precision applications such as power-good detection or coarse thresholding. For tighter offset, the AI-grade LMC7221AIMX/NOPB (5 mV max) is available in identical SOIC-8 packaging.
Is LMC7221BIMX/NOPB pin-compatible with other comparators in SOIC-8?
LMC7221BIMX/NOPB uses a proprietary 8-pin SOIC pinout with Pins 1–4 assigned to IN−, IN+, GND, OUT, and Pins 5/7/8 as NC. It is not pin-compatible with generic SOIC-8 comparators like LM393 or TLV3701, which use different pin mappings (e.g., dual-channel or push-pull outputs). Always verify pin functions using the LMC7221BIMX/NOPB datasheet Figure 1 before PCB layout. LMC7221BIMX/NOPB shares pinout with other LMC7221 variants (e.g., AIMX/NOPB) in SOIC-8.
LMC7221BIMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 15V, ±1.35V ~ 7.5V
- :
- 15mV @ 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
LMC7221BIMX/NOPB FAQ
1.How can I place an order for LMC7221BIMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221BIMX/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 LMC7221BIMX/NOPB reliable?
The price and inventory of LMC7221BIMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221BIMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMC7221BIMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221BIMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221BIMX/NOPB?
LMC7221BIMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221BIMX/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 LMC7221BIMX/NOPB?
For technical support, including LMC7221BIMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221BIMX/NOPB requirements.
6.How does Aetrix verify that LMC7221BIMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC7221BIMX/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 LMC7221BIMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMC7221BIMX/NOPB?
All LMC7221BIMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221BIMX/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 LMC7221BIMX/NOPB part is unused and in its original packaging.
Return procedure for LMC7221BIMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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