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Texas Instruments LMV842QMA/NOPB
- Part No.:
- LMV842QMA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV842QMA/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,744
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Product details
Overview
LMV842QMA/NOPB from Texas Instruments is a dual-channel, CMOS-input, rail-to-rail input/output (RRIO) operational amplifier optimized for high-impedance sensor interface and battery-powered instrumentation. It operates from 2.7 V to 12 V, delivers 4.5 MHz unity-gain bandwidth, draws only 1 mA per channel, and features 500 µV max input offset voltage and 0.3 pA typical input bias current - enabling precision signal conditioning in space-constrained, low-power systems.
For engineers reviewing the LMV842QMA/NOPB datasheet, LMV842QMA/NOPB pinout, LMV842QMA/NOPB application, or LMV842QMA/NOPB equivalent, key selection criteria include its RRIO swing at 3.3 V/5 V, ultra-low input bias current for photodiode or pH sensor front-ends, −40°C to +125°C automotive-grade temperature range, and VSSOP-8 package compatibility with high-density PCB layouts.
Technical Context
The LMV842QMA/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, requiring external series resistance for overvoltage protection during slewing. Its RRIO architecture uses complementary input pairs and Class AB output stage to maintain linearity across full supply rails.
It achieves 133 dB open-loop gain and 112 dB CMRR at DC, supported by 108 dB PSRR, enabling stable closed-loop gain accuracy in noisy industrial environments. The 20 nV/√Hz input voltage noise and 2.5 V/µs slew rate support clean amplification of low-level sensor signals up to ~200 kHz without distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports single-supply operation from Li-ion (3.3 V, 3.7 V) to industrial 12 V rails without level-shifting. |
| Unity-Gain Bandwidth | 4.5 MHz - enables stable gain-of-10 amplification up to ~450 kHz, suitable for active filters and DAC buffering. |
| Input Bias Current | 0.3 pA typical - preserves signal integrity in high-Z sensor interfaces (e.g., piezoelectric, electrochemical) without loading. |
| Input Offset Voltage | ±500 µV max - ensures <0.1% gain error in 100-mV full-scale sensor outputs without trimming. |
| Rail-to-Rail I/O | Input common-mode range extends 100 mV beyond rails; output swings within 50 mV of rails at 10-kΩ load - maximizes dynamic range in low-voltage systems. |
| Quiescent Current | 1.5 mA max per channel - allows dual-amplifier operation on coin-cell or energy-harvesting supplies for >1-year battery life. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor IoT sensor nodes. |
Pinout & Package
LMV842QMA/NOPB is housed in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm × 1.00 mm, optimized for thermal performance (RθJA = 179.2°C/W) and PCB area efficiency in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail buffered signal; requires local 100-nF bypass capacitor to V+ for stability. |
| 2 (–IN A) | Inverting input A | Accepts feedback network; differential input voltage must be limited to ±300 mV to avoid ESD diode conduction. |
| 3 (+IN A) | Noninverting input A | High-impedance node (0.3 pA bias); sensitive to PCB leakage - guard ring recommended for sub-pA applications. |
| 4 (V–) | Negative supply | Ground reference for single-supply use; connects to system GND or negative rail in split-supply configurations. |
| 5 (+IN B) | Noninverting input B | Independent high-Z input for second sensor channel; shares no internal coupling with Channel A. |
| 6 (–IN B) | Inverting input B | Configurable for differential sensing or transimpedance amplification; same ESD protection as Pin 2. |
| 7 (OUT B) | Amplifier B output | Electrically isolated output; supports independent load driving without crosstalk (channel separation >140 dB @ 1 kHz). |
| 8 (V+) | Positive supply | Accepts 2.7–12 V; requires low-ESR ceramic decoupling (0.1 µF + 2.2 µF) placed ≤2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS Input Stage | 0.3 pA input bias current enables direct interfacing with high-impedance sensors (e.g., glass pH electrodes, photodiodes) without signal attenuation. |
| Rail-to-Rail Input/Output | Full supply-rail utilization preserves >95% of available dynamic range in 3.3-V systems, reducing need for gain-stage recentering. |
| Low Power Operation | 1 mA per channel quiescent current allows dual-channel signal conditioning in always-on wearable health monitors with multi-year battery life. |
| Wide Supply Range | 2.7–12 V operation supports drop-in replacement across legacy 5-V, modern 3.3-V, and 12-V industrial control designs without redesign. |
| Automotive Temperature Grade | −40°C to +125°C qualification meets AEC-Q100 stress test requirements for engine control, ADAS sensor fusion, and cabin air quality modules. |
Applications
| Medical Sensor Front-End | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying microvolt-level EEG or ECG signals from dry-contact electrodes in portable diagnostic devices. IC Role / Device Role / Timing Role: Dual-channel RRIO op amp configured as low-noise instrumentation amplifier front-end with 0.3 pA input bias preserving electrode polarization voltage. Use Value: Enables >100 dB common-mode rejection at 50/60 Hz without trimming, extending usable battery life by minimizing active filtering stages. |
Use Scenario: Conditioning analog outputs from temperature, humidity, and gas sensors in solar-powered environmental monitoring nodes. IC Role / Device Role / Timing Role: Dual amplifier providing simultaneous sensor buffering and active low-pass filtering (cutoff ≤10 Hz) before SAR ADC sampling. Use Value: 1 mA/channel supply current reduces total system sleep-mode power to <5 µA, enabling 5-year field deployment on single AA cell. |
| Automotive Cabin Air Quality Monitor | Industrial pH/Conductivity Transmitter |
Use Scenario: Signal conditioning for NDIR CO₂ and VOC sensors in HVAC control modules exposed to under-dash temperature extremes. IC Role / Device Role / Timing Role: Dual op amp implementing ratiometric reference scaling and sensor linearization circuitry across −40°C to +125°C ambient. Use Value: 0.5 µV/°C max input offset drift ensures <±0.3% full-scale error over temperature, eliminating factory recalibration. |
Use Scenario: Transimpedance amplification of nanoamp-level current from electrochemical pH probes in wastewater treatment controllers. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with guarded input traces and 0.3 pA bias current minimizing measurement offset. Use Value: Achieves ±0.01 pH resolution without auto-zero circuitry, reducing BOM cost and board area versus chopper-stabilized alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9062IDGKR | Higher 10-MHz GBW and 6.5-V/µs slew rate; 0.2 pA input bias; but only rated to 105°C max junction temperature. | Better for wideband active filters or fast-settling data acquisition, but unsuitable for under-hood automotive use above 105°C. | Select TLV9062IDGKR when bandwidth >6 MHz is required and ambient temperature stays ≤105°C. |
| OPA2333AIDR | Zero-drift architecture; 0.02 µV/°C offset drift; 25 nV/√Hz noise; but 360-µA supply current per channel and 350-kHz GBW. | Superior DC precision for long-term sensor calibration stability, but insufficient bandwidth for audio or ultrasonic signal paths. | Choose OPA2333AIDR for ultra-low drift in static measurement systems where bandwidth <400 kHz is acceptable. |
Compared with TLV9062IDGKR and OPA2333AIDR, LMV842QMA/NOPB uniquely balances 4.5-MHz bandwidth, 0.3-pA input bias, −40°C to +125°C operation, and 1-mA quiescent current - making it optimal for automotive and industrial sensor nodes requiring both precision and speed without thermal derating.
Availability
LMV842QMA/NOPB is available at Aetrix Electronics and suitable for medical sensor front-ends, battery-powered data loggers, and automotive cabin air quality monitors requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LMV842QMA/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 specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and automotive-grade ICs.
The LMV84x family was designed specifically for high-impedance sensor interface and battery-powered instrumentation, combining CMOS input fidelity, rail-to-rail operation, and extended temperature capability in miniature packages.
FAQ
What is the maximum supply voltage for LMV842QMA/NOPB?
The absolute maximum supply voltage for LMV842QMA/NOPB is 13.2 V (V+ – V−), but the recommended operating range is 2.7 V to 12 V. Operating continuously at 13.2 V risks permanent damage; TI specifies 12 V as the upper limit for reliable long-term functionality across −40°C to +125°C.
Does LMV842QMA/NOPB support true rail-to-rail input at 3.3-V supply?
Yes, LMV842QMA/NOPB supports rail-to-rail input with a common-mode voltage range from −0.1 V to 3.4 V at 3.3-V supply, verified per Electrical Characteristics Table 6.5. This allows direct connection of sensors referenced to ground or V+ without level-shifting circuitry.
Can LMV842QMA/NOPB drive a 600-Ω load while maintaining rail-to-rail output swing?
No - LMV842QMA/NOPB's output swing degrades under heavy loads. At 10-kΩ load, it swings within 50 mV of rails; at 600 Ω, output swing is reduced to ~1.2 V from each rail (per Figure 17). For 600-Ω driving, consider buffer stages or higher-output-current amplifiers like OPA2991.
Is LMV842QMA/NOPB qualified for automotive applications?
Yes, LMV842QMA/NOPB is AEC-Q100 qualified for automotive use, with guaranteed operation from −40°C to +125°C ambient temperature and robust ESD tolerance (±2000 V HBM). Its VSSOP-8 package and 125°C rating make it suitable for engine control, ADAS, and cabin electronics.
What layout practices are critical for achieving 0.3-pA input bias current with LMV842QMA/NOPB?
To preserve LMV842QMA/NOPB's 0.3-pA input bias current, implement a guard ring around Pins 2, 3, 5, and 6 tied to a low-impedance reference (e.g., V+/2), use low-leakage PCB materials (e.g., FR-4 with solder mask over bare copper), avoid conformal coating near inputs, and clean flux residues thoroughly post-assembly.
LMV842QMA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- 4.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 1.03mA (x2 Channels)
- Current - Output / Channel:
- 37 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMV842QMA/NOPB FAQ
1.How can I place an order for LMV842QMA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV842QMA/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 LMV842QMA/NOPB reliable?
The price and inventory of LMV842QMA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV842QMA/NOPB is usually 5 days.
3.What payment methods are accepted for LMV842QMA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV842QMA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV842QMA/NOPB?
LMV842QMA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV842QMA/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 LMV842QMA/NOPB?
For technical support, including LMV842QMA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV842QMA/NOPB requirements.
6.How does Aetrix verify that LMV842QMA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV842QMA/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 LMV842QMA/NOPB meets industry standards.
7.What is the process for return or replacement of LMV842QMA/NOPB?
All LMV842QMA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV842QMA/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 LMV842QMA/NOPB part is unused and in its original packaging.
Return procedure for LMV842QMA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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