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Texas Instruments LMV842QMAX/NOPB
- Part No.:
- LMV842QMAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV842QMAX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,551
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Product details
Overview
LMV842QMAX/NOPB from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS 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, 133 dB open-loop gain, and 0.3 pA input bias current - enabling precision signal conditioning in space-constrained industrial and portable systems.
For engineers reviewing the LMV842QMAX/NOPB datasheet, LMV842QMAX/NOPB pinout, LMV842QMAX/NOPB application, or LMV842QMAX/NOPB equivalent, key selection criteria include its RRIO capability at 3.3 V/5 V/±5 V supply, −40°C to +125°C temperature range, low 1 mA per channel supply current, and VSSOP-8 packaging for high-density PCB layouts.
Technical Context
The LMV842QMAX/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and features internal compensation for stable operation with capacitive loads up to 100 pF. Its rail-to-rail input common-mode range extends from V− − 0.1 V to V+ + 0.2 V (at 5 V), and output swing reaches within 32 mV of rails under 10 kΩ load.
Designed for single-supply and split-supply configurations, it maintains 112 dB CMRR and 108 dB PSRR across frequency, with 20 nV/√Hz input voltage noise at 1 kHz - supporting low-noise amplification in high-gain transducer interfaces without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - supports direct integration into 3.3 V microcontroller I/O domains and 5 V/±5 V analog subsystems without level-shifting. |
| Unity-Gain Bandwidth | 4.5 MHz - enables stable closed-loop operation up to ~300 kHz with gain ≥10 while preserving phase margin >67°. |
| Input Bias Current | 0.3 pA typical - minimizes voltage error in high-Z sensor bridges (e.g., 10 MΩ source) to <3 µV at 25°C. |
| Input Offset Voltage | ±500 µV max - ensures ≤0.5% gain error in 100× instrumentation amplifier configurations at room temperature. |
| Output Swing (RL = 10 kΩ) | Within 32 mV of V+ and 38 mV of V− at 5 V supply - allows full-scale ADC utilization without headroom loss in 12-bit+ data acquisition. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive sensors and industrial motor control feedback loops. |
| Supply Current per Channel | 1.5 mA max - enables dual-amplifier operation on coin-cell or energy-harvesting power budgets. |
Pinout & Package
LMV842QMAX/NOPB is packaged in an 8-pin VSSOP (DGK) with nominal body size 3.00 mm × 3.00 mm, optimized for thermal performance (RθJA = 179.2°C/W) and board area efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail sourced/sunk current up to 33 mA; requires local 100 nF bypass capacitor at V+ pin. |
| 2 (−IN A) | Inverting input A | High-impedance node (7 pF capacitance); differential voltage must be limited to ±300 mV to avoid protection diode conduction. |
| 3 (+IN A) | Noninverting input A | CMOS input with 0.3 pA bias current; common-mode range extends to V− − 0.1 V and V+ + 0.2 V at 5 V supply. |
| 4 (V−) | Negative supply | Ground reference for single-supply operation or −5 V rail in split-supply designs; connects to PCB ground plane. |
| 5 (+IN B) | Noninverting input B | Independent high-Z input for second channel; shares same ESD protection topology and bias current spec as Pin 3. |
| 6 (−IN B) | Inverting input B | Matches Pin 2 electrical behavior; differential input limitation applies separately per channel. |
| 7 (OUT B) | Amplifier B output | Functionally identical to Pin 1; supports independent loading and decoupling. |
| 8 (V+) | Positive supply | Accepts 2.7–12 V; requires low-ESR ceramic capacitor (≥100 nF) between Pins 4 and 8 for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input and Output | Enables full dynamic range utilization with 3.3 V ADCs and single-supply sensor excitation circuits without level-shifting components. |
| 0.3 pA Input Bias Current | Reduces offset drift in piezoresistive bridge amplifiers and pH electrode buffers where source impedances exceed 1 GΩ. |
| 4.5 MHz Gain-Bandwidth Product | Supports active filter design (e.g., 2nd-order Sallen-Key) with cutoff frequencies up to 200 kHz while maintaining >60° phase margin. |
| −40°C to +125°C Operating Range | Validates functionality in automotive cabin modules and industrial PLC analog input cards without derating. |
| 112 dB Common-Mode Rejection | Rejects noise coupling from shared ground paths in multi-sensor systems using single-ended wiring. |
Applications
| High-Impedance Sensor Interface | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying output of MEMS pressure sensor with 100 MΩ Thévenin impedance in handheld medical device. IC Role / Device Role / Timing Role: Dual-channel op amp configured as precision noninverting amplifier (G = 100) and reference buffer. Use Value: 0.3 pA input bias current limits DC error to <10 µV, preserving 16-bit resolution over full temperature range. | Use Scenario: Signal conditioning for thermistor-based temperature logger powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-power transimpedance amplifier converting thermistor current to voltage, followed by rail-to-rail output buffer. Use Value: 1 mA per channel supply current extends battery life to >2 years at 1-sample-per-second duty cycle. |
| DAC Output Buffer | Active Filter Stage |
Use Scenario: Driving 12-bit DAC output to 50 Ω coaxial cable in portable test equipment. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating DAC core from cable capacitance and load variations. Use Value: 4.5 MHz GBW ensures <0.1% settling error for 10 V step within 1 µs, meeting 1 MSPS update rate requirements. | Use Scenario: Second-order low-pass filter (fc = 50 kHz) in audio front-end for voice recorder. IC Role / Device Role / Timing Role: Dual op amp implementing Sallen-Key topology with matched internal gain stages. Use Value: 20 nV/√Hz input noise and 133 dB open-loop gain minimize passband distortion and preserve SNR >95 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV842IDR | Same silicon die, SOIC-8 package (4.90 mm × 3.91 mm); RθJA = 121.4°C/W vs 179.2°C/W for VSSOP. | Preferred for through-hole prototyping or legacy board compatibility; higher thermal resistance limits power density. | Select when mechanical mounting or reworkability outweighs board area constraints. |
| TLV9062IDR | Higher 10 MHz GBW, 0.5 pA input bias current, but only rated to 85°C ambient; no guaranteed 125°C operation. | Suitable for consumer-grade portable instruments but not automotive or industrial control environments. | Choose for bandwidth-critical applications where extended temperature qualification is unnecessary. |
Compared with LMV842IDR and TLV9062IDR, LMV842QMAX/NOPB uniquely balances 125°C operation, ultra-low input bias current, and VSSOP-8 footprint - making it optimal for miniaturized, thermally demanding sensor nodes where long-term reliability is critical.
Availability
LMV842QMAX/NOPB is available at Aetrix Electronics and suitable for high-impedance sensor interface, battery-powered instrumentation, and DAC buffering applications requiring stable component supply across automotive, industrial, and medical product lifecycles.
Supply support for LMV842QMAX/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 signal chain solutions.
The LMV84x family was designed specifically for low-power, high-accuracy signal conditioning in portable and harsh-environment electronics - emphasizing rail-to-rail operation, wide supply flexibility, and robust ESD protection.
FAQ
What is the maximum differential input voltage allowed for LMV842QMAX/NOPB?
The LMV842QMAX/NOPB specifies an absolute maximum differential input voltage of ±300 mV, enforced by internal anti-parallel ESD diodes. Exceeding this limit risks forward-biasing the diodes and drawing excessive current from the signal source. For safe operation, ensure input signals remain within this window or add series current-limiting resistors per TI's layout guidance.
Does LMV842QMAX/NOPB support true rail-to-rail output swing at 3.3 V supply?
Yes, LMV842QMAX/NOPB achieves rail-to-rail output swing at 3.3 V supply: typical high-level output is within 50 mV of V+, and low-level output is within 65 mV of V− under 2 kΩ load. At 10 kΩ load, swing improves to within 28 mV (high) and 33 mV (low), enabling full utilization of 3.3 V ADC references without external level-shifting circuitry.
What is the input common-mode voltage range for LMV842QMAX/NOPB at 5 V supply?
At 5 V supply, the LMV842QMAX/NOPB input common-mode voltage range is specified from −0.2 V to +5.2 V (CMRR ≥50 dB), extending 200 mV beyond both rails. This allows direct interfacing with signals referenced to negative supplies or above V+, such as current-sense shunt voltages in high-side configurations.
Can LMV842QMAX/NOPB drive capacitive loads without oscillation?
LMV842QMAX/NOPB is internally compensated for stability with capacitive loads up to 100 pF. For loads exceeding 100 pF, TI recommends adding a small isolation resistor (e.g., 10–50 Ω) in series with the output. Phase margin remains >67° at CL = 20 pF, and overshoot stays below 15% across the full operating temperature range.
Is LMV842QMAX/NOPB qualified for automotive applications?
LMV842QMAX/NOPB is not AEC-Q200 qualified. While it operates across −40°C to +125°C and meets many automotive environmental requirements, it lacks formal automotive qualification. For automotive use, consider TI's AEC-Q200 qualified alternatives like TLV9062-Q1 or OPA2333-Q1, which provide equivalent performance with certified reliability testing.
LMV842QMAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LMV842QMAX/NOPB FAQ
1.How can I place an order for LMV842QMAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV842QMAX/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 LMV842QMAX/NOPB reliable?
The price and inventory of LMV842QMAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV842QMAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV842QMAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV842QMAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV842QMAX/NOPB?
LMV842QMAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV842QMAX/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 LMV842QMAX/NOPB?
For technical support, including LMV842QMAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV842QMAX/NOPB requirements.
6.How does Aetrix verify that LMV842QMAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV842QMAX/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 LMV842QMAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV842QMAX/NOPB?
All LMV842QMAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV842QMAX/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 LMV842QMAX/NOPB part is unused and in its original packaging.
Return procedure for LMV842QMAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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