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Texas Instruments LMC6492BEMX/NOPB
- Part No.:
- LMC6492BEMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6492BEMX/NOPB.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,739
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Product details
Overview
LMC6492BEMX/NOPB from Texas Instruments (formerly National Semiconductor) is a dual CMOS rail-to-rail input and output operational amplifier designed for single-supply automotive and industrial sensor signal conditioning. It operates from 5V to 15V, delivers rail-to-rail output swing within 20 mV of supply rails at 100 kΩ load, features 150 fA input bias current and 120 dB open-loop gain, and is qualified for −40°C to +125°C operation - enabling high-accuracy pressure, oxygen, and temperature sensor front-ends.
For engineers reviewing the LMC6492BEMX/NOPB datasheet, LMC6492BEMX/NOPB pinout, LMC6492BEMX/NOPB application, or LMC6492BEMX/NOPB equivalent, this page provides verified technical context, package mapping, real-world application cards, and validated alternative options for automotive-grade analog signal chain design.
Technical Context
The LMC6492BEMX/NOPB employs a proprietary CMOS input stage enabling rail-to-rail common-mode voltage range - including inputs extending 0.25 V beyond V− and V+ - eliminating phase inversion and nonlinear errors when transducer signals exceed supply rails. Its output stage delivers true rail-to-rail swing with sourcing/sinking capability up to ±30 mA.
It achieves 82 dB CMRR and PSRR over 0 V to 15 V common-mode range, supports stable operation with capacitive loads via external series resistance, and maintains ultra-low input current (150 fA typ.) across temperature - critical for interfacing high-impedance sensors like piezoresistive pressure elements and electrochemical oxygen cells.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5 V to 15 V - enables direct use in 5 V and 12 V automotive systems without level-shifting. |
| Input Bias Current | 150 fA typical - preserves signal integrity from high-Z sources (e.g., pH electrodes, piezoelectric sensors). |
| Open-Loop Gain | 120 dB at RL = 100 kΩ - ensures <0.01% gain error in precision instrumentation amplifiers. |
| CMRR | 82 dB min (0 V ≤ VCM ≤ 15 V) - rejects common-mode noise in noisy engine bay environments. |
| Output Swing | Within 20 mV of rails at 100 kΩ - maximizes dynamic range in 5 V ADC interfaces. |
| Operating Temp | −40°C to +125°C - meets AEC-Q100 Grade 0 requirements for under-hood automotive applications. |
| Slew Rate | 1.3 V/µs typ. - supports bandwidth-critical sensor outputs up to ~200 kHz. |
| Input Offset Drift | 1.0 µV/°C - minimizes thermal-induced DC error in wide-temperature-range sensor calibration. |
Pinout & Package
LMC6492BEMX/NOPB is supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package, designated M08A by National Semiconductor, with standard dual op-amp pinout and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Rail-to-rail output capable of sourcing/sinking ±30 mA - drives ADC reference buffers or low-impedance transducer loads. |
| 2 | Inverting Input A | CMOS input accepting voltages from V− −0.25 V to V+ +0.25 V - accommodates overvoltage transducer signals without phase reversal. |
| 3 | Non-Inverting Input A | Identical common-mode range as Pin 2 - enables differential sensing with matched offset and drift. |
| 4 | V− (GND) | Negative supply terminal - referenced to system ground in single-supply configurations. |
| 5 | Non-Inverting Input B | Independent second channel input - allows dual-sensor conditioning (e.g., pressure + temperature) on one die. |
| 6 | Inverting Input B | Matched performance to Channel A inputs - supports identical circuit topologies per channel. |
| 7 | Output B | Second rail-to-rail output - enables independent signal paths without cross-talk (150 dB isolation). |
| 8 | V+ | Positive supply terminal - accepts 5 V to 15 V, supporting both microcontroller I/O and 12 V battery domains. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond supply rails | Accepts VCM down to V− −0.25 V and up to V+ +0.25 V - eliminates need for external clamping in transducer interfaces. |
| Ultra-low input current (150 fA) | Enables direct connection to >1 GΩ sensor impedances without measurable bias-induced offset. |
| High CMRR (82 dB) | Maintains accuracy in noisy automotive harnesses where common-mode interference exceeds 1 Vpp. |
| 120 dB open-loop gain | Supports closed-loop gains ≥1000 with <0.1% gain error - suitable for precision instrumentation amplifier front-ends. |
| −40°C to +125°C operation | Validated performance across full automotive under-hood temperature range - no derating required. |
| 150 dB amp-to-amp isolation | Prevents crosstalk between channels in dual-sensor applications such as differential pressure + ambient temp. |
Applications
| Automotive Transducer Amplifier | Pressure Sensor Interface |
|---|---|
Use Scenario: Signal conditioning for piezoresistive manifold absolute pressure (MAP) sensors in engine control units. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end, with one channel for bridge excitation monitoring and the other for differential output amplification. Use Value: Rail-to-rail input accommodates bridge imbalance voltages exceeding supply rails; 150 fA bias current prevents loading of high-resistance strain gauge elements. | Use Scenario: Amplifying low-level differential output from MEMS-based barometric pressure sensors in ADAS modules. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage before sigma-delta ADC, operating from 5 V supply with minimal headroom loss. Use Value: 20 mV rail-to-rail output swing maximizes SNR into 5 V ADCs; 1.0 µV/°C offset drift ensures stable calibration over vehicle lifetime. |
| Oxygen Sensor Signal Conditioning | Temperature Sensor Front-End |
Use Scenario: Interfacing zirconia-based exhaust oxygen (lambda) sensors requiring accurate millivolt-level DC measurement. IC Role / Device Role / Timing Role: Low-drift, high-input-impedance buffer and gain stage for electrochemical cell output. Use Value: 150 fA input current avoids polarization errors; 82 dB CMRR rejects ignition noise coupled onto sensor leads. | Use Scenario: Linearizing and amplifying output from NTC thermistors in battery management systems. IC Role / Device Role / Timing Role: Dual-channel ratiometric amplifier - one channel for thermistor voltage, another for reference voltage scaling. Use Value: Matched channel characteristics ensure consistent gain/offset tracking; −40°C to +125°C rating covers full EV battery operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC2272CDR | Higher input bias current (1 pA), lower CMRR (70 dB), same 8-pin SOIC package. | Less suitable for ultra-high-impedance sensors; acceptable for general-purpose 12 V industrial signal conditioning. | Choose TLC2272CDR only if 150 fA bias current and 82 dB CMRR are not required. |
| OPA2333AIDR | Zero-drift architecture, 0.02 µV/°C offset drift, but limited 5.5 V max supply and −40°C to +125°C rating only for specific variants. | Better DC stability for precision metrology; unsuitable for 12 V automotive systems due to supply limit. | Select OPA2333AIDR only for low-voltage, ultra-low-drift applications - not for 12 V MAP or oxygen sensors. |
Compared with TLC2272CDR and OPA2333AIDR, LMC6492BEMX/NOPB uniquely combines 150 fA input current, 82 dB CMRR, and 5–15 V operation in a single automotive-qualified device - making it irreplaceable for high-Z transducer interfaces in under-hood environments.
Availability
LMC6492BEMX/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial pressure transmitters, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMC6492BEMX/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 acquired National Semiconductor in 2011 and maintains its legacy precision analog portfolio, including rail-to-rail op-amps optimized for high-reliability applications.
The LMC6492BEMX/NOPB belongs to the LMC649x family of CMOS rail-to-rail op-amps engineered specifically for single-supply automotive sensor signal conditioning across −40°C to +125°C.
FAQ
What is the maximum supply voltage for LMC6492BEMX/NOPB?
The absolute maximum supply voltage (V+ − V−) for LMC6492BEMX/NOPB is 16 V, with recommended operating range from 5 V to 15 V. Operation at 15 V is fully characterized per datasheet specifications, including output swing, slew rate, and CMRR - making LMC6492BEMX/NOPB suitable for 12 V automotive battery-sourced designs with transient margin.
Does LMC6492BEMX/NOPB support rail-to-rail input beyond the supply rails?
Yes, LMC6492BEMX/NOPB supports input common-mode voltage from V− −0.25 V to V+ +0.25 V at room temperature, with guaranteed operation from V− −0.25 V to V+ +0.25 V over full temperature range. This feature prevents phase inversion and nonlinear clipping when interfacing with transducers whose output exceeds supply rails - a key differentiator versus standard rail-to-rail op-amps.
What is the input bias current specification for LMC6492BEMX/NOPB?
The input bias current for LMC6492BEMX/NOPB is 150 fA typical at 25°C, with a maximum of 200 pA over temperature. This ultra-low value enables direct interface with high-impedance sources such as piezoresistive pressure sensors, electrochemical oxygen cells, and NTC thermistors without introducing measurable offset or loading error - a critical requirement confirmed in National Semiconductor's DS012049 datasheet.
Is LMC6492BEMX/NOPB qualified for automotive applications?
Yes, LMC6492BEMX/NOPB is specified for operation from −40°C to +125°C junction temperature and was explicitly developed for automotive systems, as stated in its General Description. It meets core requirements for under-hood applications including MAP, oxygen, and temperature sensors - though formal AEC-Q100 certification status must be verified per TI's current product documentation.
What package type is used for LMC6492BEMX/NOPB?
LMC6492BEMX/NOPB uses an 8-pin SOIC (Small Outline Integrated Circuit) package, designated M08A by National Semiconductor. It is supplied in tape-and-reel format (NOPB = lead-free, RoHS-compliant), with standard 1.27 mm pitch and body dimensions of 4.9 mm × 3.9 mm - compatible with automated SMT assembly and IPC-7351B footprints.
LMC6492BEMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 1.3V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.15 pA
- Voltage - Input Offset:
- 110 µV
- Current - Supply:
- 1.3mA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 15.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMC6492BEMX/NOPB FAQ
1.How can I place an order for LMC6492BEMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6492BEMX/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 LMC6492BEMX/NOPB reliable?
The price and inventory of LMC6492BEMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6492BEMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6492BEMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6492BEMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6492BEMX/NOPB?
LMC6492BEMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6492BEMX/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 LMC6492BEMX/NOPB?
For technical support, including LMC6492BEMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6492BEMX/NOPB requirements.
6.How does Aetrix verify that LMC6492BEMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6492BEMX/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 LMC6492BEMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6492BEMX/NOPB?
All LMC6492BEMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6492BEMX/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 LMC6492BEMX/NOPB part is unused and in its original packaging.
Return procedure for LMC6492BEMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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