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Texas Instruments LMC7221BIM/NOPB
- Part No.:
- LMC7221BIM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC7221BIM/NOPB.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:164
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Product details
Overview
LMC7221BIM/NOPB from Texas Instruments is a micropower CMOS comparator with rail-to-rail input and open-drain output in an 8-pin SOIC package. It operates from 2.7V to 15V, draws only 7 μA typical supply current at 5V, achieves 4 μs propagation delay (tPHL/tPLH) at 2.7V, and supports input common-mode voltage beyond both rails - enabling direct sensing of battery voltage or current-sense signals in portable power monitoring circuits.
For engineers reviewing the LMC7221BIM/NOPB datasheet, LMC7221BIM/NOPB pinout, LMC7221BIM/NOPB application, or LMC7221BIM/NOPB equivalent, this page delivers verified specifications, SOIC-8 terminal mapping, mixed-voltage system design guidance, and validated alternative options for low-power comparator selection in space-constrained, battery-operated designs.
Technical Context
The LMC7221BIM/NOPB implements a CMOS input stage with ultra-low input bias current (0.04 pA typical) and rail-to-rail common-mode range extending 0.2 V below V− and up to V+ + 0.3 V. Its open-drain output stage allows pull-up to voltages independent of the comparator's supply - supporting level translation between 2.7V logic and 3.3V/5V/15V domains without additional interface circuitry.
This device belongs to the LMC7221 family's "B" grade, specifying 15 mV maximum input offset voltage (VOS) over temperature and ±30 mA output sink capability. It is characterized across −40°C to +85°C and qualified for industrial applications requiring stable performance under varying supply conditions and high-impedance sensor interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 15 V - enables single-supply operation across Li-ion, 3.3V, 5V, and 12V systems without level-shifting. |
| Input Offset Voltage (VOS) | 15 mV max (B-grade) - ensures reliable threshold detection in low-gain sensor interfaces where reference voltage tolerances are tight. |
| Supply Current (IS) | 14 μA max at 5V - extends battery life in always-on monitoring circuits such as smoke detectors or wearable health sensors. |
| Propagation Delay | 4 μs (tPHL/tPLH) at 2.7V, 100 mV overdrive - sufficient for slow-to-moderate speed event detection (e.g., battery undervoltage lockout). |
| Input Common-Mode Range | V− − 0.2 V to V+ + 0.3 V - permits direct comparison of signals near ground or near V+ without external resistive dividers or amplifiers. |
| Output Sink Current | 45 mA short-circuit rating - safely drives LEDs, optocouplers, or logic inputs with external pull-up, even at 15V rail. |
| Input Bias Current | 0.04 pA typical - preserves signal integrity when interfacing high-impedance sources like thermistors or piezoelectric sensors. |
Pinout & Package
LMC7221BIM/NOPB uses the standard 8-pin SOIC package (Package Drawing D, JEDEC MS-012), 3.91 mm × 4.90 mm footprint, 1.75 mm height, RoHS-compliant matte tin (Sn) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | High-impedance CMOS node accepting analog signals down to V− − 0.2 V; requires guarding in noisy environments. |
| 2 | Non-Inverting Input (+) | Rail-to-rail input capable of sensing signals up to V+ + 0.3 V; compatible with direct battery voltage monitoring. |
| 3 | Ground (V−) | Reference return for single-supply operation; must be low-impedance to minimize noise coupling into inputs. |
| 4 | Output (Open Drain) | Drains current only - requires external pull-up resistor to define logic-high level; supports mixed-voltage interfacing. |
| 5 | NC | No internal connection; left unconnected per TI recommendation to avoid parasitic coupling or ESD path disruption. |
| 6 | V+ | Positive supply pin; accepts 2.7–15 V; decoupling capacitor (0.1 μF ceramic) required within 5 mm of this pin. |
| 7 | NC | No internal connection; electrically isolated; must remain unconnected to maintain specified ESD tolerance (2 kV HBM). |
| 8 | NC | No internal connection; not bonded; floating per TI package documentation - no routing or thermal pad connection advised. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 7 μA typical supply current at 5V enables >10-year battery life in coin-cell-powered IoT endpoint sensors. |
| Rail-to-Rail Input Range | Input common-mode extends beyond supply rails (V− − 0.2 V to V+ + 0.3 V), eliminating need for input biasing networks in supply-monitoring circuits. |
| Open-Drain Output | Supports flexible level translation: pull-up to 3.3V, 5V, or 15V independently of V+, simplifying mixed-voltage board architecture. |
| Ultra-Low Input Bias Current | 0.04 pA typical minimizes voltage error across high-value timing or sensor resistors (>10 MΩ), preserving RC time constants. |
| Industrial Temperature Range | Specified from −40°C to +85°C ensures stable comparator thresholds in automotive cabin modules or outdoor industrial controllers. |
Applications
| Battery Voltage Monitor | Mixed-Voltage Logic Interface |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger cutoff or alert at 2.8 V and 4.2 V thresholds. IC Role / Device Role / Timing Role: Comparator compares sensed cell voltage against precision reference; open-drain output drives microcontroller interrupt line. Use Value: Rail-to-rail input enables direct sensing without attenuation; 7 μA quiescent current avoids measurable battery drain during sleep mode. |
Use Scenario: Interfacing a 2.7V microcontroller GPIO to a 5V UART transceiver enable pin in a portable medical device. IC Role / Device Role / Timing Role: LMC7221BIM/NOPB acts as level translator - its output pulled up to 5V while powered from 2.7V supply. Use Value: Eliminates need for dedicated level-shifter IC or discrete MOSFET circuit, reducing BOM count and PCB area by >30%. |
| Low-Power Sensor Threshold Detector | LED Status Indicator Driver |
|
Use Scenario: Detecting motion via PIR sensor output crossing 100 mV threshold in a battery-powered security sensor node. IC Role / Device Role / Timing Role: Compares high-impedance PIR output directly against reference; output triggers wake-up signal to MCU. Use Value: 0.04 pA input bias current prevents loading of weak sensor signal; rail-to-rail input accommodates small differential swings near ground. |
Use Scenario: Driving a green LED indicator on a handheld test instrument powered by two AA cells (2.4–3.2 V range). IC Role / Device Role / Timing Role: Open-drain output sinks LED current through 1 kΩ series resistor; output low = LED on, high = LED off. Use Value: 45 mA sink capability ensures bright LED illumination; micropower operation keeps indicator active without compromising battery runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221AIM/NOPB | A-grade version with 5 mV max VOS vs. 15 mV for LMC7221BIM/NOPB; otherwise identical SOIC-8 packaging and electrical specs. | Preferred where tighter threshold accuracy is required (e.g., precision voltage supervisors), but adds cost and may not improve system-level performance if reference tolerance dominates error budget. | Select LMC7221AIM/NOPB only when VOS < 5 mV is mandatory; otherwise LMC7221BIM/NOPB offers optimal cost/performance balance for general-purpose detection. |
| TLV3701IDBVR | Single 5-pin SOT-23 comparator with rail-to-rail input, 1.8–16 V supply, 650 nA supply current, and push-pull output - no external pull-up needed. | Better suited for ultra-low-power (<1 μA) applications but lacks open-drain flexibility; incompatible pinout prevents drop-in replacement. | Choose TLV3701IDBVR only when minimizing board space and eliminating pull-up resistors outweighs need for mixed-voltage translation capability. |
Compared with LMC7221AIM/NOPB, the LMC7221BIM/NOPB trades 10 mV higher offset for lower unit cost and broader availability; versus TLV3701IDBVR, it sacrifices nanoscale quiescent current for open-drain interoperability and proven industrial reliability across 2.7–15 V operation.
Availability
LMC7221BIM/NOPB is available at Aetrix Electronics and suitable for battery voltage monitoring, mixed-voltage logic interfacing, low-power sensor threshold detection, and LED status indication requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for LMC7221BIM/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 and embedded processing solutions, with over 50 years of innovation in precision analog ICs and industrial-grade components.
The LMC7221 product line was designed specifically for space- and power-constrained applications requiring rail-to-rail input, micropower operation, and open-drain output flexibility - targeting portable instrumentation, battery management, and sensor interface systems.
FAQ
What is the maximum supply voltage for the LMC7221BIM/NOPB?
The LMC7221BIM/NOPB supports a maximum supply voltage of 16 V (V+ − V−), with absolute maximum ratings specifying 15 V at the output pin and 16 V across the supply terminals. Operating voltage is rated from 2.7 V to 15 V, ensuring compatibility with common battery chemistries and industrial rails. Exceeding 15 V during normal operation risks violating guaranteed specifications and may accelerate parametric drift.
Does the LMC7221BIM/NOPB have rail-to-rail output capability?
No, the LMC7221BIM/NOPB features an open-drain output stage - it can only sink current to ground and requires an external pull-up resistor to establish a logic-high voltage. This architecture enables level translation but does not provide rail-to-rail voltage swing. The output voltage high level is determined solely by the pull-up voltage source, not the LMC7221BIM/NOPB's internal supply.
Can the LMC7221BIM/NOPB operate from a single 3.3V supply?
Yes, the LMC7221BIM/NOPB is fully specified for 2.7 V to 15 V single-supply operation. At 3.3 V, it maintains rail-to-rail input range (−0.2 V to 3.6 V), 14 μA max supply current, and 4 μs propagation delay - making it ideal for 3.3 V microcontroller-based systems requiring low-power analog threshold detection without external level shifting.
What is the input offset voltage specification for the LMC7221BIM/NOPB?
The LMC7221BIM/NOPB is the "B-grade" variant, with a maximum input offset voltage (VOS) of 15 mV over temperature (−40°C to +85°C). Typical VOS is 3 mV at 25°C. This grade balances cost and performance for applications where sub-5 mV offset is unnecessary - such as battery end-of-discharge detection or coarse sensor triggering.
Is the LMC7221BIM/NOPB pin-compatible with the LMC7221AIM/NOPB?
Yes, the LMC7221BIM/NOPB and LMC7221AIM/NOPB share identical SOIC-8 packaging, pinout, and all electrical characteristics except input offset voltage (5 mV max for AIM vs. 15 mV max for BIM). They are functionally interchangeable in PCB layouts - no redesign or footprint change is required when substituting between these grades.
LMC7221BIM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
LMC7221BIM/NOPB FAQ
1.How can I place an order for LMC7221BIM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221BIM/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 LMC7221BIM/NOPB reliable?
The price and inventory of LMC7221BIM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221BIM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC7221BIM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221BIM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221BIM/NOPB?
LMC7221BIM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221BIM/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 LMC7221BIM/NOPB?
For technical support, including LMC7221BIM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221BIM/NOPB requirements.
6.How does Aetrix verify that LMC7221BIM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC7221BIM/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 LMC7221BIM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC7221BIM/NOPB?
All LMC7221BIM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221BIM/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 LMC7221BIM/NOPB part is unused and in its original packaging.
Return procedure for LMC7221BIM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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