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Texas Instruments LMC7225IMX
- Part No.:
- LMC7225IMX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC7225IMX.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
LMC7225IMX from Texas Instruments is a micro-power, rail-to-rail CMOS comparator with open-drain output, operating from 2V to 8V supply, consuming only 0.7 μA typical supply current, featuring ±0.3 V input common-mode range beyond rails, and delivering 30 mA sink capability at 5V. It is used in battery-powered voltage monitoring circuits where ultra-low quiescent current and level-shifting capability are critical.
For engineers reviewing the LMC7225IMX datasheet, LMC7225IMX pinout, LMC7225IMX application, or LMC7225IMX equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated SOT-23 pin assignment, confirmed alternative comparators with documented functional trade-offs, and supply-chain support for low-power embedded systems.
Technical Context
The LMC7225IMX implements a high-gain (140 dB) CMOS comparator core with ESD-protected inputs extending beyond V+ and V− by ±0.3 V, enabling direct sensing of supply rails or high-side current sense resistors. Its open-drain output supports external pull-up to voltages up to 15 V, enabling logic-level translation across incompatible domains.
It achieves 24 μs propagation delay (high-to-low) at 10 mV overdrive and 5V supply, with 0.35 μs fall time into 50 pF load using a 100 kΩ pull-up. Input offset voltage is 6 mV max at 25°C, and CMRR is 60 dB minimum over full common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 8 V - supports single-cell Li-ion (3.0 V), dual-AA (3.0 V), and 5 V logic rails without regulation. |
| Supply Current (Typ) | 0.7 μA - enables >10-year battery life in coin-cell–powered wake-up monitors. |
| Input Common-Mode Range | V− −0.3 V to V+ +0.3 V - allows direct connection to VCC or ground-referenced sense points without attenuation. |
| Output Type | Open-drain - permits wired-OR configuration and level shifting up to 15 V with external pull-up. |
| Propagation Delay (10 mV overdrive) | 24 μs (tPHL), 29 μs (tPLH) at 5 V - suitable for RC timer thresholds and slow-varying sensor trip points. |
| Input Offset Voltage (Max) | 6 mV at 25°C - sets minimum detectable differential voltage in precision threshold detection. |
| Sink Current Capability | 30 mA at 5 V - drives LEDs, small relays, or MOSFET gates directly without buffer stages. |
Pinout & Package
LMC7225IMX is housed in a 5-pin SOT-23 package (DBV drawing), 2.9 mm × 1.6 mm × 1.45 mm, RoHS-compliant, moisture sensitivity level 1, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Open-drain output | Drains current when asserted; requires external pull-up for logic-high state; supports voltage translation up to 15 V. |
| 2 (GND) | Ground reference | Return path for supply and output sink current; must be low-impedance for stable threshold accuracy. |
| 3 (IN−) | Inverting input | Differential input node; accepts signals beyond rails (−0.3 V to V+ +0.3 V); <5 fA bias current enables high-Z dividers. |
| 4 (IN+) | Non-inverting input | Differential input node; identical rail-overrange and bias characteristics as IN−; enables window or reference comparison. |
| 5 (V+) | Positive supply | Power input pin; supports 2 V–8 V range; internal regulator not required; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with overvoltage tolerance | Accepts inputs from −0.3 V to V+ +0.3 V - eliminates need for clamping diodes or attenuators in high-side sensing. |
| Ultra-low 0.7 μA supply current | Reduces average system power in always-on monitoring nodes - e.g., 0.0007 mW at 1 V enables decades of CR2032 operation. |
| Open-drain output with 15 V level-shift capability | Enables interface between 1.8 V microcontrollers and 12 V alarm drivers using one external resistor - no level-shifter IC needed. |
| 60 dB min CMRR over full common-mode range | Maintains threshold stability despite supply ripple or ground bounce - critical in noisy automotive or industrial environments. |
| Latch-up resistance >300 mA | Withstands transient ESD and fault currents without destructive latch-up - eliminates need for external current-limiting on inputs. |
Applications
| Battery Voltage Monitor | RC Timer Threshold Detector |
|---|---|
|
Use Scenario: Detecting low-battery condition in portable medical devices powered by single Li-ion cell (2.7–4.2 V). IC Role / Device Role / Timing Role: Comparator compares divided battery voltage against 2.0 V reference; open-drain output pulls down MCU reset line. Use Value: 0.7 μA quiescent current extends usable battery life by >15% versus standard comparators; rail-overrange input avoids external voltage dividers. |
Use Scenario: Generating precise time delays in handheld test equipment using R-C charging ramp. IC Role / Device Role / Timing Role: Compares capacitor voltage against fixed reference; output triggers next stage upon threshold crossing. Use Value: 24 μs propagation delay ensures sub-100 μs timing resolution; 6 mV max VOS limits timing error to <0.5% in 10 ms intervals. |
| High-Side Current Sense Comparator | Window Comparator for Sensor Fault Detection |
|
Use Scenario: Monitoring motor driver supply current in battery-powered robotics via high-side shunt resistor. IC Role / Device Role / Timing Role: Compares voltage across shunt (referenced to VCC) against upper threshold; open-drain output flags overcurrent. Use Value: Input range extending 0.3 V above V+ allows direct connection to shunt top node - no level-shifting op amp required. |
Use Scenario: Validating thermistor output stays within safe operating band in HVAC control units. IC Role / Device Role / Timing Role: Two LMC7225IMX units configured as upper/lower threshold detectors; outputs feed OR gate for fault flag. Use Value: Matched 6 mV VOS and 60 dB CMRR ensure consistent trip points across temperature; SOT-23 footprint saves board space in multi-channel designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDBVR | 0.5 μA supply current, 1.8–6 V supply, push-pull output, 10 mV VOS max | Cannot level-shift beyond supply; lacks rail-overrange input; better for low-VDD logic interfaces | Select TLV3691IDBVR when push-pull drive into MCU GPIO is preferred and supply is ≤6 V. |
| MAX9021AUT+T | 1.1 μA supply current, 1.6–5.5 V supply, open-drain output, 5 mV VOS max, −40°C to +125°C | Wider temp range but higher IQ; no input overvoltage tolerance beyond rails | Select MAX9021AUT+T for extended temperature automotive use where rail-overrange is not required. |
Compared with LMC7225IMX, TLV3691IDBVR offers lower supply current but sacrifices level-shifting and overvoltage-tolerant inputs; MAX9021AUT+T adds extended temperature rating but increases quiescent power and removes rail-overrange capability - making LMC7225IMX optimal for cost-sensitive, battery-powered systems needing robust input handling and flexible output interfacing.
Availability
LMC7225IMX is available at Aetrix Electronics and suitable for battery voltage monitoring, RC timing circuits, high-side current sensing, and window comparator applications requiring stable component supply across industrial and consumer product lifecycles.
Supply support for LMC7225IMX 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 company specializing in analog and embedded processing technologies, with leadership in low-power signal conditioning and precision analog ICs.
The LMC7225IMX belongs to TI's micro-power comparator product line, designed specifically for energy-constrained applications such as portable instrumentation, wearables, and remote sensors where nanowatt-level operation and rail-overrange input integrity are mandatory.
FAQ
What is the maximum supply voltage for the LMC7225IMX?
The LMC7225IMX supports a supply voltage range of 2 V to 8 V. Absolute maximum rating is 10 V, but operation above 8 V is not characterized or guaranteed. For reliable long-term performance, maintain V+ within 2 V–8 V per the Electrical Characteristics table in the official datasheet SNOS882E.
Does the LMC7225IMX have rail-to-rail input capability?
Yes, the LMC7225IMX features true rail-to-rail input operation with common-mode range extending 0.3 V beyond both supply rails (V− −0.3 V to V+ +0.3 V). This allows direct connection to VCC or ground-referenced nodes without external clamping or attenuation networks.
Can the LMC7225IMX output drive a 12 V load?
Yes - the LMC7225IMX has an open-drain output that can be pulled up to voltages up to 15 V using an external resistor. When the output is active (low), it sinks up to 30 mA at 5 V supply, enabling direct interface with 12 V logic or indicator circuits without additional level-shifting components.
What is the typical propagation delay of the LMC7225IMX at 5 V supply?
At 5 V supply and 10 mV input overdrive, the LMC7225IMX exhibits 24 μs typical propagation delay for high-to-low transitions (tPHL) and 29 μs for low-to-high transitions (tPLH). These values are measured under specified test conditions with 50 pF load and 100 kΩ pull-up for the open-drain output.
Is the LMC7225IMX suitable for automotive applications?
No - the LMC7225IMX is a catalog-grade device rated for −40°C to +85°C operation. For automotive use, TI offers the LMC7215-Q1 (AEC-Q100 Grade 3 qualified), but there is no Q1 variant of the LMC7225. Designers requiring automotive qualification must select alternate open-drain comparators with AEC-Q100 certification.
LMC7225IMX 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:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2V ~ 8V, ±1V ~ 4V
- :
- 6mV @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 30mA
- Current - Output (Typ):
- 1µA
- Current - Quiescent (Max):
- 80dB CMRR, 90dB PSRR
- CMRR, PSRR (Typ):
- 29µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LMC7225IMX FAQ
1.How can I place an order for LMC7225IMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7225IMX 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 LMC7225IMX reliable?
The price and inventory of LMC7225IMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7225IMX is usually 5 days.
3.What payment methods are accepted for LMC7225IMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7225IMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7225IMX?
LMC7225IMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7225IMX 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 LMC7225IMX?
For technical support, including LMC7225IMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7225IMX requirements.
6.How does Aetrix verify that LMC7225IMX is sourced from the original manufacturer or authorized distributors?
All LMC7225IMX 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 LMC7225IMX meets industry standards.
7.What is the process for return or replacement of LMC7225IMX?
All LMC7225IMX units undergo pre-shipment inspection (PSI). If there is an issue with LMC7225IMX, 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 LMC7225IMX part is unused and in its original packaging.
Return procedure for LMC7225IMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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