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Texas Instruments LMV791MK/NOPB
- Part No.:
- LMV791MK/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMV791MK/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:4,993
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Product details
Overview
LMV791MK/NOPB from Texas Instruments is a single-channel, rail-to-rail output, CMOS-input operational amplifier optimized for low-noise, low-voltage sensor signal conditioning. It delivers 5.8 nV/√Hz input voltage noise density, 17 MHz unity-gain bandwidth, and 1.15 mA supply current at 5 V, operating from 1.8 V to 5.5 V. It is used in photodiode transimpedance amplifiers where femtoampere bias current and ground-sensing capability are critical.
For engineers reviewing the LMV791MK/NOPB datasheet, LMV791MK/NOPB pinout, LMV791MK/NOPB application, or LMV791MK/NOPB equivalent, key selection criteria include its 100 fA input bias current, shutdown mode (0.02 µA), rail-to-rail swing into 2-kΩ load (±45 mV from rails), and SOT-23-6 package compatibility with space-constrained portable instrumentation.
Technical Context
The LMV791MK/NOPB employs a CMOS input stage enabling femtoampere-level input bias current and ground-referenced common-mode operation down to V−. Its internal architecture supports stable unity-gain operation with 17 MHz gain-bandwidth product and 9.5 V/µs typical slew rate under 5-V supply.
It integrates an active enable/shutdown control pin (EN) that toggles between 1.15 mA active mode and sub-1 µA shutdown state, with defined logic thresholds referenced to V+ and V−. Output stage design enables ±60 mA sourcing/sinking capability while maintaining rail-to-rail swing within 25 mV of either rail at 10-kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 5.8 nV/√Hz at 1 kHz - enables high-fidelity amplification of weak sensor signals without adding significant noise floor |
| Unity-Gain Bandwidth | 17 MHz - supports wideband signal conditioning up to audio and ultrasonic frequencies |
| Supply Current (Active) | 1.15 mA at 5 V - balances performance and battery life in portable systems |
| Shutdown Current | 0.02 µA - extends battery runtime during idle periods in duty-cycled sensor nodes |
| Rail-to-Rail Output Swing | ±25 mV from rails at 10-kΩ load - maximizes dynamic range in 1.8–5.5 V single-supply systems |
| Input Bias Current | 100 fA max at 125°C - preserves signal integrity in high-impedance photodiode and pH electrode interfaces |
| Enable Pin Threshold | VEN ≥ 4.6 V (enable), ≤ 0.4 V (shutdown) at 5 V supply - ensures robust digital control interface with standard logic levels |
Pinout & Package
LMV791MK/NOPB is housed in a 6-pin SOT-23 (DDC) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplifier output | Delivers rail-to-rail voltage swing; capable of sourcing/sinking up to 60 mA |
| V− (Pin 2) | Negative supply | Reference for single-supply operation; input common-mode includes this rail |
| +IN (Pin 3) | Noninverting input | High-impedance CMOS node; accepts signals down to V− (ground in single-supply) |
| −IN (Pin 4) | Inverting input | High-impedance CMOS node; used for feedback and transimpedance configurations |
| EN (Pin 5) | Enable control input | Digital logic input; high = active, low = shutdown; draws ≤10 µA |
| V+ (Pin 6) | Positive supply | Supports 1.8–5.5 V operation; PSRR > 80 dB across 10 Hz–100 kHz |
Key Features
| Feature | Design Value |
|---|---|
| CMOS input stage | Enables 100 fA max input bias current and ground-sensing capability for direct single-supply sensor interfacing |
| Integrated shutdown control | Reduces quiescent current to 0.02 µA, enabling micro-power operation in intermittent-sampling systems |
| Rail-to-rail output drive | Delivers full-scale swing into 2-kΩ loads with <45 mV headroom, preserving SNR in low-voltage ADC front-ends |
| Low-noise wideband architecture | 5.8 nV/√Hz noise + 17 MHz GBW allows clean amplification of fast, low-amplitude biomedical or optical signals |
| Specified 1.8-V operation | Ensures functionality across full battery discharge curve in coin-cell and Li-ion powered devices |
Applications
| Photodiode Amplifiers | Active Filters and Buffers |
|---|---|
Use Scenario: Amplifying nanoamp-level photocurrent from silicon PIN diodes in pulse oximetry or smoke detection modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and low voltage noise to preserve signal-to-noise ratio. Use Value: 100 fA input bias minimizes dark-current error; 5.8 nV/√Hz noise ensures detection of weak optical signals without gain-induced degradation. | Use Scenario: Implementing 2nd-order anti-aliasing or reconstruction filters in portable data acquisition systems. IC Role / Device Role / Timing Role: Unity-gain stable buffer and gain stage with 17 MHz bandwidth supporting filter cutoffs up to 100 kHz. Use Value: Rail-to-rail output swing maintains full dynamic range into successive-stage ADCs; low THD+N (0.01%) preserves waveform fidelity. |
| Medical Instrumentation | Sensor Interface Applications |
Use Scenario: Front-end amplification for ECG electrodes or impedance pneumography sensors requiring DC-coupled, low-drift signal paths. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with ground-referenced inputs and low offset drift (−1 µV/°C). Use Value: Input common-mode range including V− enables true single-supply electrode biasing; 1.15 mA supply current supports continuous monitoring on AA batteries. | Use Scenario: Signal conditioning for high-impedance gas or humidity sensors in IoT environmental monitors. IC Role / Device Role / Timing Role: Low-power, low-noise amplifier with shutdown control synchronized to sensor wake cycles. Use Value: 0.02 µA shutdown current extends 10-year battery life in wireless sensor nodes; CMOS input avoids loading sensitive sensing elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA376AIDBVR | Lower input voltage noise (4.2 nV/√Hz), higher supply current (760 µA), no shutdown pin | Better noise performance but lacks power-gating capability; unsuitable for duty-cycled systems | Select when lowest possible noise dominates over power budget and shutdown is unnecessary |
| MCP6001T-E/OT | Higher input bias current (1 pA), lower bandwidth (1 MHz), no shutdown, smaller 5-pin SOT-23 package | Cost-optimized general-purpose op-amp; insufficient for precision photodiode or medical front-ends | Select only for non-critical, low-bandwidth, ultra-low-cost sensor buffering where femtoampere bias is not required |
Compared with OPA376AIDBVR and MCP6001T-E/OT, LMV791MK/NOPB uniquely combines 100 fA input bias, 5.8 nV/√Hz noise, 17 MHz bandwidth, and integrated shutdown in a 6-pin SOT-23-making it the only option among the three suitable for battery-powered, high-precision, intermittently active sensor amplifiers.
Availability
LMV791MK/NOPB is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation front-ends, and low-power sensor interface applications requiring stable component supply across industrial temperature ranges (−40°C to +125°C).
Supply support for LMV791MK/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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers and low-power signal chain solutions.
The LMV791MK/NOPB belongs to TI's LMV79x family of low-noise, CMOS-input op-amps designed specifically for battery-powered, ground-sensing sensor interfaces in portable medical, industrial, and optical measurement equipment.
FAQ
What is the maximum operating supply voltage for LMV791MK/NOPB?
The absolute maximum supply voltage (V+ − V−) for LMV791MK/NOPB is 6 V. The recommended operating range is 1.8 V to 5.5 V. Operation beyond 5.5 V risks permanent damage and violates the device's qualified electrical specifications; sustained use at 6 V is not supported per TI's Absolute Maximum Ratings table.
Does LMV791MK/NOPB support true rail-to-rail input common-mode range?
No. LMV791MK/NOPB supports rail-to-rail *output* swing and has an input common-mode voltage range that extends to the negative rail (V−), but does not reach the positive rail (V+). At 5 V supply, the specified common-mode input range is −0.3 V to +4 V, meaning it is ground-sensing but not full rail-to-rail input capable.
What is the typical turn-on time for LMV791MK/NOPB from shutdown mode?
The typical turn-on time (ton) for LMV791MK/NOPB is 110 ns at 5 V supply, measured from EN rising edge to output settling within 1% of final value. This fast wake-up enables use in high-frequency sampling systems where amplifier activation must align precisely with sensor readout windows.
Can LMV791MK/NOPB drive a 600-Ω load effectively?
Yes. LMV791MK/NOPB is explicitly characterized driving 600-Ω loads, delivering 0.01% THD+N at 1 kHz and maintaining rail-to-rail output swing within 45 mV of either rail at 2-kΩ and 25 mV at 10-kΩ. While output swing degrades slightly at 600 Ω, its ±60 mA output current capability ensures stable operation into such loads.
Is LMV791MK/NOPB suitable for use as a comparator?
No. LMV791MK/NOPB is not designed or characterized for open-loop comparator operation. Its internal compensation, output stage architecture, and lack of built-in hysteresis make it prone to instability and slow response in comparator configurations. TI explicitly advises against using LMV791MK/NOPB as a comparator in the datasheet's Feature Description section.
LMV791MK/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 11.5V/µs
- Gain Bandwidth Product:
- 17 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.15mA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMV791MK/NOPB FAQ
1.How can I place an order for LMV791MK/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV791MK/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 LMV791MK/NOPB reliable?
The price and inventory of LMV791MK/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV791MK/NOPB is usually 5 days.
3.What payment methods are accepted for LMV791MK/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV791MK/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV791MK/NOPB?
LMV791MK/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV791MK/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 LMV791MK/NOPB?
For technical support, including LMV791MK/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV791MK/NOPB requirements.
6.How does Aetrix verify that LMV791MK/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV791MK/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 LMV791MK/NOPB meets industry standards.
7.What is the process for return or replacement of LMV791MK/NOPB?
All LMV791MK/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV791MK/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 LMV791MK/NOPB part is unused and in its original packaging.
Return procedure for LMV791MK/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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