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Texas Instruments LMV842MMX/NOPB
- Part No.:
- LMV842MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMV842MMX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,153
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Product details
Overview
LMV842MMX/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 input bias current - enabling precision signal conditioning in space-constrained, low-power systems.
For engineers reviewing the LMV842MMX/NOPB datasheet, LMV842MMX/NOPB pinout, LMV842MMX/NOPB application, or LMV842MMX/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, thermal stability across −40°C to +125°C, and compatibility with 8-pin VSSOP PCB layouts.
Technical Context
The LMV842MMX/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and supports single-supply (2.7–12 V) or split-supply (±5 V) operation. Its rail-to-rail input common-mode range extends from V− − 0.1 V to V+ + 0.2 V (at 3.3 V), and output swing reaches within 32 mV of rails (RL = 10 kΩ, 5 V supply).
It achieves 133 dB open-loop gain and 112 dB CMRR at DC, with 20 nV/√Hz input voltage noise and 2.5 V/µs slew rate - characteristics validated across 3.3 V, 5 V, and ±5 V operating conditions. Phase margin remains stable at 67° with 20 pF capacitive load, supporting robust closed-loop stability in active filter and DAC buffer designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V - enables direct interface with Li-ion, 3.3 V logic, and industrial 10 V rails without level-shifting. |
| Unity-Gain Bandwidth | 4.5 MHz - supports stable amplification of audio-band and fast-sampling sensor signals up to ~300 kHz closed-loop. |
| Input Bias Current | 0.3 pA typical - preserves signal integrity in high-Z sources like piezoelectric sensors, pH electrodes, and photodiode transimpedance stages. |
| Input Offset Voltage | ±500 µV max - ensures ≤0.01% gain error in 10× instrumentation amplifier configurations at room temperature. |
| Supply Current per Channel | 1.5 mA max - allows dual-channel operation on 10 mA budget in portable medical or IoT edge nodes. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial control, and outdoor environmental monitoring. |
| Input Voltage Noise | 20 nV/√Hz at 1 kHz - limits added noise to <1 µV RMS in 10 kHz bandwidth sensor interfaces. |
Pinout & Package
LMV842MMX/NOPB is packaged in an 8-pin VSSOP (DGK) with nominal body size 3.00 mm × 3.00 mm - optimized for high-density PCBs in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail sourced/sunk output; requires local 100 nF bypass capacitor at V+ pin for stability. |
| 2 (−IN A) | Inverting input A | High-impedance CMOS node; differential input voltage must be limited to ±300 mV to avoid protection diode conduction. |
| 3 (+IN A) | Noninverting input A | Accepts common-mode voltages from V− − 0.1 V to V+ + 0.2 V (3.3 V supply); matched to −IN A for low offset drift. |
| 4 (V−) | Negative supply | Ground reference in single-supply use; connects to −5 V in split-rail configurations; must be low-impedance. |
| 5 (+IN B) | Noninverting input B | Independent high-Z input for second channel; layout symmetry with Channel A minimizes crosstalk (<−120 dB @ 1 kHz). |
| 6 (−IN B) | Inverting input B | Matches Channel A electrical specs; internal 130 Ω series resistors limit fault current during overvoltage events. |
| 7 (OUT B) | Amplifier B output | Electrically isolated from OUT A; supports independent feedback networks for dual-path signal conditioning. |
| 8 (V+) | Positive supply | Accepts 2.7–12 V; decoupling to V− is mandatory - 100 nF ceramic + 1 µF tantalum recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization with 3.3 V microcontrollers and ADCs - no headroom loss at signal extremes. |
| CMOS input stage | Delivers 0.3 pA input bias current, reducing leakage-induced offset in high-impedance pH or ion-selective electrode circuits. |
| Low 1 mA/channel supply current | Supports always-on sensor monitoring in battery-operated devices with >1-year runtime on CR2032 cells (dual-channel active). |
| 4.5 MHz gain-bandwidth product | Permits stable 10× closed-loop gain up to 400 kHz - suitable for anti-aliasing filters preceding 1 MSPS SAR ADCs. |
| −40°C to +125°C operation | Validated performance across automotive under-hood and industrial PLC environments without derating or external heating. |
| 8-pin VSSOP package | 3.0 × 3.0 mm footprint reduces board area by 60% vs SOIC-8 - critical for wearable health monitors and compact IoT nodes. |
Applications
| Photodiode Signal Conditioning | pH Electrode Interface |
|---|---|
|
Use Scenario: Amplifying weak current from UV/VIS photodiodes in portable spectrometers with 1012 Ω transimpedance gain. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with ultra-low input bias current preserving photocurrent fidelity. Use Value: 0.3 pA input bias current prevents >10 mV offset error at 1012 Ω gain, enabling sub-nA photocurrent resolution. |
Use Scenario: Buffering high-output-impedance glass pH electrodes (100 MΩ–1 GΩ) in handheld water quality testers. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating electrode from ADC input loading and cable capacitance. Use Value: CMOS inputs prevent polarization drift and measurement hysteresis; RRIO swing captures full 0–14 pH range at 3.3 V. |
| Portable ECG Front-End | DAC Output Buffer |
|
Use Scenario: Amplifying microvolt-level biopotential signals in battery-powered ECG patches with motion artifact rejection. IC Role / Device Role / Timing Role: Instrumentation amplifier gain stage with matched input bias and low 1/f noise below 10 Hz. Use Value: 20 nV/√Hz input noise and 112 dB CMRR suppress 50/60 Hz interference while preserving ST-segment morphology. |
Use Scenario: Driving 12-bit DAC outputs to analog actuators in programmable logic controllers with 0–10 V control signals. IC Role / Device Role / Timing Role: Low-offset, rail-to-rail output buffer ensuring monotonicity and minimizing code-dependent glitches. Use Value: ±500 µV max VOS limits INL error to <0.125 LSB; RRIO swing guarantees full 0–10 V compliance at 12 V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9062IDR | Higher 10 MHz GBW, 0.55 pA IB, but 1.6 mA/ch supply current and narrower 1.8–5.5 V supply range. | Better for high-speed active filters; less suitable for 12 V industrial sensors or ultra-low-power battery operation. | Select TLV9062IDR when bandwidth >6 MHz is required and supply is constrained to ≤5.5 V. |
| OPA2333AIDR | Zero-drift architecture, 0.02 µV/°C TCVOS, but 17 µV max VOS, 200 pA IB, and 17 µA quiescent current per channel. | Superior DC precision for weigh scales; insufficient speed (350 kHz GBW) and noise (55 nV/√Hz) for audio or fast sensor sampling. | Select OPA2333AIDR only for sub-µV offset-critical DC measurements where speed and noise are secondary. |
Compared with TLV9062IDR and OPA2333AIDR, LMV842MMX/NOPB uniquely balances 4.5 MHz bandwidth, 0.3 pA input bias, 1 mA/ch power, and 2.7–12 V flexibility - making it optimal for dual-channel, mixed-signal, battery-or-line-powered sensor nodes requiring both precision and responsiveness.
Availability
LMV842MMX/NOPB is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and battery-powered test equipment requiring stable component supply and long-term manufacturability.
Supply support for LMV842MMX/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 op amp innovation and broad industrial qualification.
The LMV84x family was designed for precision, low-power, high-impedance signal conditioning in portable and harsh-environment applications - emphasizing RRIO operation, wide supply range, and miniature packaging without sacrificing AC performance.
FAQ
What is the maximum capacitive load drive capability of LMV842MMX/NOPB?
The LMV842MMX/NOPB maintains 67° phase margin with up to 20 pF capacitive load, as verified in TI's SNOSAT1I datasheet Figure 20. Driving >100 pF loads requires isolation resistor (≥100 Ω) between output and capacitance to prevent peaking or oscillation - a design constraint confirmed across all tested supply voltages (3.3 V, 5 V, ±5 V).
Does LMV842MMX/NOPB support true rail-to-rail input with V− = 0 V?
Yes. At 3.3 V supply (V+ = 3.3 V, V− = 0 V), LMV842MMX/NOPB accepts input common-mode voltages from −0.1 V to 3.4 V, per Electrical Characteristics Table 6.5. This allows direct interfacing with grounded sensors and 0 V-referenced DACs without level-shifting circuitry.
How does input bias current of LMV842MMX/NOPB vary with common-mode voltage?
LMV842MMX/NOPB input bias current remains ≤10 pA across full common-mode range (−0.2 V to 5.2 V at 5 V supply), with typical value of 0.3 pA near mid-supply. Figure 7–9 in SNOSAT1I show IB stays flat within ±0.1 pA from VCM = 0.5 V to 4.5 V - critical for stable transimpedance gain in photodiode applications.
Can LMV842MMX/NOPB operate reliably at 12 V supply?
Yes. LMV842MMX/NOPB is fully specified from 2.7 V to 12 V, with validated parameters including 1.7 mA max supply current, 136 dB open-loop gain, and 4.5 MHz GBW at 12 V (per datasheet Section 6.7). Thermal metrics confirm safe operation up to +125°C ambient at 12 V with RθJA = 179.2°C/W in VSSOP.
Is LMV842MMX/NOPB pin-compatible with other dual op amps in VSSOP-8?
No. LMV842MMX/NOPB uses standard dual-op-amp pinout (OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, V+), matching industry convention - but functional compatibility requires verification of supply range, bandwidth, and input structure. For example, replacing MCP6022 would require checking CMOS vs bipolar input trade-offs.
LMV842MMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 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-VSSOP
LMV842MMX/NOPB FAQ
1.How can I place an order for LMV842MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV842MMX/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 LMV842MMX/NOPB reliable?
The price and inventory of LMV842MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV842MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV842MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV842MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV842MMX/NOPB?
LMV842MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV842MMX/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 LMV842MMX/NOPB?
For technical support, including LMV842MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV842MMX/NOPB requirements.
6.How does Aetrix verify that LMV842MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV842MMX/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 LMV842MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV842MMX/NOPB?
All LMV842MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV842MMX/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 LMV842MMX/NOPB part is unused and in its original packaging.
Return procedure for LMV842MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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