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Texas Instruments LMV842MA/NOPB
- Part No.:
- LMV842MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV842MA/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
LMV842MA/NOPB from Texas Instruments is a dual-channel, CMOS-input, rail-to-rail input/output (RRIO) operational amplifier optimized for high-impedance sensor interfaces 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 portable systems.
For engineers reviewing the LMV842MA/NOPB datasheet, LMV842MA/NOPB pinout, LMV842MA/NOPB application, or LMV842MA/NOPB equivalent, key selection criteria include its RRIO swing at low supply voltages, ultra-low input bias current for photodiode/bridge sensor buffering, wide temperature range (−40°C to +125°C), and compatibility with 3.3 V, 5 V, and ±5 V supplies in dual-amplifier configurations.
Technical Context
The LMV842MA/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and supports rail-to-rail operation across full supply range (2.7–12 V). Its 4.5-MHz gain-bandwidth product and 2.5 V/µs slew rate enable stable unity-gain and moderate-gain active filtering without phase margin degradation.
Designed for single-supply and split-supply operation, it maintains >100 dB open-loop gain (RL = 2 kΩ), 112 dB CMRR, and 108 dB PSRR across temperature. Input common-mode range extends 0.1 V beyond rails, and output swing reaches within 32 mV of each rail under 10-kΩ load at 5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports direct interface with Li-ion, 3.3 V logic, and industrial 10 V rails without level-shifting. |
| Unity-Gain Bandwidth | 4.5 MHz - enables stable active filters up to ~200 kHz and fast-settling DAC buffers in data acquisition systems. |
| Input Bias Current | 0.3 pA typical - preserves signal integrity in high-Z sensor nodes (e.g., pH electrodes, piezoresistive bridges). |
| Input Offset Voltage | ±500 µV max - ensures <1 LSB error in 12-bit systems with gains ≤10, reducing calibration overhead. |
| Supply Current per Channel | 1.5 mA max - allows dual-channel operation on coin-cell or energy-harvesting power budgets. |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin, industrial motor control, and outdoor IoT sensor nodes. |
| Rail-to-Rail I/O | Input CMVR extends −0.2 V to 5.2 V at 5 V supply; output swings within 32 mV of rails - maximizes dynamic range in low-voltage systems. |
Pinout & Package
LMV842MA/NOPB is packaged in an 8-pin VSSOP (DGK) with nominal body size 3.00 mm × 3.00 mm, optimized for high-density PCB layouts in portable and embedded applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives external load or feedback network; rail-to-rail swing supports full-scale ADC input buffering. |
| 2 (−IN A) | Inverting input A | Accepts feedback signal or inverted sensor signal; 0.3 pA bias current minimizes resistor-induced offset. |
| 3 (+IN A) | Noninverting input A | Connects to high-Z sensor node; CMOS input prevents loading of microamp-level transducer outputs. |
| 4 (V−) | Negative supply | Ground reference in single-supply mode; −5 V in dual-supply configuration; must be decoupled locally. |
| 5 (+IN B) | Noninverting input B | Independent second channel input; enables differential pair amplification or dual-sensor readout. |
| 6 (−IN B) | Inverting input B | Supports independent feedback path for channel B; no crosstalk with channel A (typical 140 dB isolation). |
| 7 (OUT B) | Amplifier B output | Provides second buffered output; identical AC/DC specs to channel A for matched performance. |
| 8 (V+) | Positive supply | Accepts 2.7–12 V; internal regulation ensures stable biasing across supply range and temperature. |
Key Features
| Feature | Design Value |
|---|---|
| CMOS Input Stage | 0.3 pA input bias current enables direct connection to >1 GΩ sensors without guard rings or T-network compensation. |
| Rail-to-Rail Input/Output | Input common-mode range includes both supply rails; output drives within 32 mV of V+ and V− - eliminates need for level-shifting in 3.3 V systems. |
| Low Power Operation | 1 mA per channel at 5 V allows dual op-amp use in always-on sensor nodes with <2.5 mW total quiescent dissipation. |
| High DC Precision | 500 µV max VOS and 0.25 µV/°C max drift over −40°C to +125°C reduce thermal calibration requirements in field-deployed equipment. |
| Wide Supply Flexibility | Specified performance at 3.3 V, 5 V, and ±5 V simplifies design reuse across battery, USB, and industrial power domains. |
Applications
| Medical Sensor Interface | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying low-level signals from electrochemical biosensors (e.g., glucose strips) with sub-µA output currents. IC Role / Device Role / Timing Role: Dual-channel precision buffer and gain stage; channel A conditions sensor output, channel B references baseline. Use Value: 0.3 pA input bias prevents sensor polarization; RRIO swing preserves full 0–3.3 V ADC range at 3.3 V supply. |
Use Scenario: Signal conditioning for multi-channel thermistor and humidity sensors in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Dual op-amp front-end: one channel for ratiometric bridge excitation and sensing, another for analog multiplexer buffering. Use Value: 1 mA per channel enables >1-year coin-cell life; −40°C to +125°C rating supports deployment in uncontrolled outdoor enclosures. |
| Industrial Bridge Transducer | Portable Audio Line Driver |
Use Scenario: Amplifying millivolt-level outputs from strain-gauge load cells in handheld torque meters. IC Role / Device Role / Timing Role: Instrumentation-grade first-stage gain block with matched dual channels for differential input rejection. Use Value: 112 dB CMRR rejects common-mode noise from motor drives; 500 µV VOS limits zero-error in factory-calibrated devices. |
Use Scenario: Driving stereo line outputs from portable media players with 3.3 V supply and 10 kΩ minimum load. IC Role / Device Role / Timing Role: Dual-output line driver with rail-to-rail swing ensuring full 2 VPP signal delivery into consumer audio inputs. Use Value: 4.5 MHz GBW supports flat frequency response to 20 kHz; THD+N <0.005% preserves audio fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9002IDR | Lower 1.2 V/µs slew rate; 1 MHz GBW; 0.2 pA input bias; 0.65 mA supply current per channel. | Better suited for ultra-low-power, low-bandwidth sensor nodes where speed is secondary to battery life. | Select TLV9002IDR when <1 MHz bandwidth suffices and supply current must be minimized below 0.7 mA/channel. |
| OPA2333AIDR | Zero-drift architecture; 12 µV max VOS; 0.02 µV/°C drift; 17 µA supply current per channel; 350 kHz GBW. | Ideal for high-precision DC-coupled applications requiring nanovolt-level stability over temperature and time. | Select OPA2333AIDR when long-term offset drift and initial VOS accuracy outweigh bandwidth and supply current needs. |
Compared with TLV9002IDR and OPA2333AIDR, LMV842MA/NOPB offers the best balance of speed (4.5 MHz), precision (500 µV VOS), and low-power operation (1 mA/channel) for general-purpose RRIO signal conditioning - making it optimal for mid-bandwidth sensor interfaces where cost, size, and performance must coexist.
Availability
LMV842MA/NOPB is available at Aetrix Electronics and suitable for medical sensor interfaces, battery-powered data loggers, industrial bridge transducers, and portable audio line drivers requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LMV842MA/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 low-power signal chain solutions.
The LMV84x family was designed specifically for high-impedance sensor interfacing and battery-operated instrumentation, combining CMOS input fidelity, rail-to-rail operation, and wide supply flexibility in miniature packages.
FAQ
What is the maximum supply voltage for LMV842MA/NOPB?
The absolute maximum supply voltage (V+ to V−) for LMV842MA/NOPB is 13.2 V, but the recommended operating range is 2.7 V to 12 V. Operating at 12 V ensures full specification compliance across −40°C to +125°C, including rail-to-rail output swing and 4.5 MHz bandwidth. Exceeding 13.2 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LMV842MA/NOPB support true rail-to-rail input at 3.3 V supply?
Yes, LMV842MA/NOPB supports rail-to-rail input at 3.3 V supply: its input common-mode voltage range extends from −0.1 V to 3.4 V (beyond both rails), verified per Electrical Characteristics Table 6.5. This allows direct connection of sensors referenced to ground or V+ without external level-shifting circuitry.
Can LMV842MA/NOPB drive a 600-Ω load while maintaining rail-to-rail output?
No - LMV842MA/NOPB is not specified to drive 600 Ω while maintaining rail-to-rail swing. At RL = 600 Ω, output swing degrades significantly (data shows >100 mV from rail); the device is characterized for rail-to-rail performance at RL ≥ 2 kΩ. For 600 Ω loads, consider higher-output-current amplifiers like OPA2350 or THS4032.
Is LMV842MA/NOPB pin-compatible with other dual op-amps in VSSOP-8 package?
No - LMV842MA/NOPB uses a standard dual op-amp pinout (V+, OUT B, −IN B, +IN B, +IN A, −IN A, OUT A, V−), but pin compatibility must be verified per manufacturer. For example, TLV9002IDR shares this pinout, but OPA2333AIDR uses different pin assignments. Always cross-check pin function tables before substitution.
What is the typical input capacitance of LMV842MA/NOPB?
The typical input capacitance of LMV842MA/NOPB is 6 pF at 5 V supply, as specified in Table 6.6 (Electrical Characteristics – 5 V). This low value minimizes phase shift in high-frequency feedback networks and reduces sensitivity to PCB stray capacitance in high-gain sensor amplifier layouts.
LMV842MA/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:
- 4 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMV842MA/NOPB FAQ
1.How can I place an order for LMV842MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV842MA/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 LMV842MA/NOPB reliable?
The price and inventory of LMV842MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV842MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMV842MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV842MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV842MA/NOPB?
LMV842MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV842MA/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 LMV842MA/NOPB?
For technical support, including LMV842MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV842MA/NOPB requirements.
6.How does Aetrix verify that LMV842MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV842MA/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 LMV842MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMV842MA/NOPB?
All LMV842MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV842MA/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 LMV842MA/NOPB part is unused and in its original packaging.
Return procedure for LMV842MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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