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Texas Instruments LMV796MFX
- Part No.:
- LMV796MFX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV796MFX.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,296
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Product details
Overview
LMV796MFX from Texas Instruments is a single-channel, low-noise, CMOS-input operational amplifier optimized for low-voltage, high-fidelity signal conditioning. It delivers 5.8 nV/√Hz input voltage noise, 17 MHz unity-gain bandwidth, and rail-to-rail output swing within a 1.8 V to 5.5 V supply range - enabling precision photodiode amplification and sensor interface in battery-powered medical and automotive systems.
For engineers reviewing the LMV796MFX datasheet, LMV796MFX pinout, LMV796MFX application, or LMV796MFX equivalent, key selection criteria include its 100 fA input bias current, 1.15 mA quiescent current at 5 V, guaranteed 2.5 V/5.0 V performance, −40°C to 125°C operating temperature, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LMV796MFX employs a CMOS input stage with femtoampere-level bias current and a low 1/f noise corner (400 Hz), making it suitable for high-impedance, low-level current-to-voltage conversion. Its unity-gain stable architecture supports wideband transimpedance configurations without external compensation.
It features an input common-mode voltage range extending to the negative rail (ground-sensing), rail-to-rail output capable of sourcing >40 mA at 1.8 V, and robust capacitive load tolerance up to 120 pF in unity-gain configuration - all while maintaining phase margin ≥30° across temperature and supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 5.8 nV/√Hz at 1 kHz - enables high-SNR amplification of microvolt-level sensor signals |
| Unity-Gain Bandwidth | 17 MHz - supports wideband audio preamplification and fast photodiode response |
| Supply Current | 1.15 mA per channel at 5 V - balances speed and power efficiency in portable instrumentation |
| Rail-to-Rail Output | Swings within 25 mV of rails at 10 kΩ load - maximizes dynamic range in 1.8–5.5 V single-supply systems |
| Input Bias Current | 100 fA typical - preserves signal integrity in high-Z photodiode and piezoelectric sensor interfaces |
| Operating Temperature | −40°C to 125°C - qualified for under-hood automotive and industrial embedded environments |
| CMRR / PSRR | ≥80 dB (CMRR), ≥75 dB (PSRR) - rejects common-mode interference and supply ripple in noisy environments |
Pinout & Package
LMV796MFX is housed in a 5-pin SOT-23 package (JEDEC MO-178AA), with 1.6 mm × 2.9 mm footprint and 0.95 mm height - optimized for compact, high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail voltage swing; drives 600 Ω loads with <0.01% THD+N |
| 2 - IN− | Inverting input | High-impedance CMOS node; accepts differential or single-ended feedback networks |
| 3 - IN+ | Non-inverting input | Ground-referenced input capability enables true single-supply sensor interfacing |
| 4 - GND | Negative supply / reference | Serves as return path for input common-mode range down to V− (0 V) |
| 5 - V+ | Positive supply | Accepts 1.8–5.5 V; quiescent current scales linearly with supply voltage |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise CMOS input stage | 5.8 nV/√Hz + 0.01 pA/√Hz enables high-fidelity amplification of weak current sources (e.g., photodiodes) |
| Rail-to-rail output with high drive strength | Sources >40 mA at 1.8 V; maintains 25 mV rail margin into 10 kΩ - extends usable output range in low-VDD systems |
| Wide supply range with guaranteed specs | Fully characterized at 2.5 V and 5.0 V; operates from 1.8 V (0°C–125°C) to 5.5 V - matches Li-ion and multi-cell battery profiles |
| Stable with capacitive loads | Unity-gain stable up to 120 pF; eliminates need for isolation resistors in many sensor buffer applications |
| Automotive-grade variant available | LMV796Q version is AEC-Q100 Grade 1 qualified - supports functional safety requirements in ADAS and body control modules |
Applications
| Photodiode Amplifiers | Active Filters and Buffers |
|---|---|
Use Scenario: Converting nanoamp-level photocurrent from silicon or InGaAs photodiodes into measurable voltage signals in optical smoke detectors and pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with high-Z input, low noise gain, and wide bandwidth to preserve fast rise times. Use Value: 5.8 nV/√Hz noise floor and 17 MHz GBW enable detection of sub-100 nA signals with >60 dB SNR at 100 kHz. |
Use Scenario: Buffering and shaping analog sensor outputs (e.g., MEMS accelerometers, thermopiles) before ADC sampling in industrial IoT nodes. IC Role / Device Role / Timing Role: Unity-gain stable voltage follower and 2nd-order active filter stage with precise pole placement. Use Value: Rail-to-rail swing and 1.15 mA supply current allow full-scale buffering from 1.8 V supplies without headroom loss or excessive power draw. |
| Medical Instrumentation | Automotive Sensor Interface |
Use Scenario: Front-end amplification of ECG electrode signals and bioimpedance measurements in portable patient monitors. IC Role / Device Role / Timing Role: Low-bias, low-noise instrumentation amplifier input stage with DC-coupled ground-referenced inputs. Use Value: 100 fA input bias minimizes electrode polarization error; −40°C to 125°C rating supports sterilization and extended field operation. |
Use Scenario: Signal conditioning for pressure, position, and temperature sensors in engine control units and battery management systems. IC Role / Device Role / Timing Role: Precision analog front-end amplifier with AEC-Q100-compatible thermal and supply resilience. Use Value: Guaranteed 2.5 V/5.0 V performance and 125°C junction rating ensure reliable operation under under-hood thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-voltage op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA376AIDBVR | Lower noise (4.5 nV/√Hz), higher supply current (760 µA), same SOT-23-5 package | Better for ultra-low-noise audio; less suitable for high-speed (>10 MHz) transimpedance due to lower GBW (5.5 MHz) | Select when noise dominates over bandwidth and power; verify stability with photodiode capacitance |
| MCP6001T-E/OT | Higher noise (17 nV/√Hz), lower supply current (100 µA), same package, no guaranteed 125°C operation | Cost-optimized for general-purpose sensing where noise <10 nV/√Hz is acceptable | Choose for commercial-temp consumer devices where 1.15 mA supply is excessive and 5.8 nV/√Hz is unnecessary |
Compared with OPA376AIDBVR and MCP6001T-E/OT, the LMV796MFX uniquely balances 5.8 nV/√Hz noise, 17 MHz bandwidth, and 1.15 mA supply in a 125°C-rated SOT-23 - making it the only option among the three qualified for automotive and high-temperature medical use cases requiring both speed and fidelity.
Availability
LMV796MFX is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation front-ends, and automotive sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV796MFX 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 op amps and low-power signal chain solutions.
The LMV796MFX belongs to TI's LMV796/LMV797 family of low-noise, CMOS-input op amps designed specifically for high-fidelity, low-voltage sensor signal conditioning in medical, automotive, and portable instrumentation.
FAQ
What is the maximum capacitive load the LMV796MFX can drive in unity-gain configuration without oscillation?
The LMV796MFX is unity-gain stable and can directly drive up to 120 pF of capacitive load without requiring external isolation resistors. This capability is verified across temperature (−40°C to 125°C) and supply voltage (1.8 V to 5.5 V), making it suitable for driving ADC input capacitors and long PCB traces in sensor interfaces without added complexity. Exceeding 120 pF may reduce phase margin below 30°, necessitating RISO compensation per TI Application Note SNOSAU9D.
Does the LMV796MFX support true single-supply operation with input signals referenced to ground?
Yes, the LMV796MFX features an input common-mode voltage range that includes the negative rail (V− = 0 V), enabling direct ground-referenced input operation in single-supply systems. This allows the non-inverting input (Pin 3) to accept signals from 0 V up to V+ − 0.3 V, supporting direct connection of thermistors, bridge sensors, and other ground-referenced transducers without level-shifting circuitry - a key enabler for low-voltage medical and automotive sensor nodes.
What is the guaranteed performance voltage for the LMV796MFX, and how does it behave at 1.8 V?
The LMV796MFX is fully specified and guaranteed at both 2.5 V and 5.0 V supply voltages across −40°C to 125°C. At 1.8 V, it remains operational from 0°C to 125°C with verified functionality - including rail-to-rail output swing and 17 MHz bandwidth - though certain parameters (e.g., output drive strength, CMRR) are not production-tested at this voltage. Designers should consult the "Operating Ratings" table in SNOSAU9D for validated 1.8 V behavior.
How does the LMV796MFX compare to the dual-channel LMV797 in terms of noise and power consumption?
The LMV796MFX (single-channel) and LMV797 (dual-channel) share identical core specifications: both deliver 5.8 nV/√Hz input voltage noise and match in bandwidth (17 MHz). However, the LMV796MFX draws 1.15 mA per amplifier at 5 V, while the LMV797 draws 1.30 mA per channel - a 13% increase attributable to process and layout differences between the SOT-23-5 and VSSOP-8 packages. For space-constrained single-channel designs, the LMV796MFX offers optimal noise/power density.
Is the LMV796MFX suitable for use as a comparator in open-loop configuration?
No - the LMV796MFX is not recommended for open-loop comparator operation. Its internal architecture includes positive feedback to enhance output current drive, which compromises slew rate symmetry and introduces unpredictable propagation delay and hysteresis when used without feedback. TI explicitly advises against comparator use in SNOSAU9D; dedicated comparators (e.g., TLV3201) should be selected for threshold-detection applications requiring fast, predictable response.
LMV796MFX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-23-5
LMV796MFX FAQ
1.How can I place an order for LMV796MFX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV796MFX 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 LMV796MFX reliable?
The price and inventory of LMV796MFX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV796MFX is usually 5 days.
3.What payment methods are accepted for LMV796MFX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV796MFX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV796MFX?
LMV796MFX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV796MFX 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 LMV796MFX?
For technical support, including LMV796MFX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV796MFX requirements.
6.How does Aetrix verify that LMV796MFX is sourced from the original manufacturer or authorized distributors?
All LMV796MFX 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 LMV796MFX meets industry standards.
7.What is the process for return or replacement of LMV796MFX?
All LMV796MFX units undergo pre-shipment inspection (PSI). If there is an issue with LMV796MFX, 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 LMV796MFX part is unused and in its original packaging.
Return procedure for LMV796MFX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV796MFX Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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