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Texas Instruments LMV796MFX/NOPB
- Part No.:
- LMV796MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV796MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,488
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Product details
Overview
LMV796MFX/NOPB from Texas Instruments is a single-channel, rail-to-rail output, low-noise CMOS-input operational amplifier optimized for low-voltage, high-fidelity signal conditioning. It delivers 5.8 nV/√Hz input voltage noise density, 17 MHz unity-gain bandwidth, and 1.15 mA supply current at 2.5 V–5.5 V operation, enabling precision photodiode amplification and sensor interface in battery-powered medical and automotive systems.
For engineers reviewing the LMV796MFX/NOPB datasheet, LMV796MFX/NOPB pinout, LMV796MFX/NOPB application, or LMV796MFX/NOPB equivalent, key selection criteria include its guaranteed 2.5 V/5.0 V performance, −40°C to 125°C temperature range, 100 fA input bias current, rail-to-rail swing into 2 kΩ, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LMV796MFX/NOPB employs a CMOS input stage with input common-mode range extending to the negative rail, supporting ground-sensing in single-supply configurations. Its VIP50 process enables stable unity-gain operation while maintaining low 1/f noise corner (400 Hz) and high open-loop gain (≥85 dB).
It features an innovative output stage capable of sourcing >40 mA at 1.8 V and sinking >37 mA at 5 V, with rail-to-rail swing specified as ≤25 mV from either rail into 10 kΩ and ≤45 mV into 2 kΩ - critical for maximizing dynamic range in low-voltage systems.
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 without degrading SNR |
| Unity-Gain Bandwidth | 17 MHz - supports wideband active filtering and audio preamplification up to ~1 MHz with gain ≥10 |
| Supply Current | 1.15 mA per channel at 2.5 V - allows continuous operation in always-on 3.3 V/5 V systems with <3.8 mW total dissipation |
| Rail-to-Rail Output Swing | ≤25 mV from rail into 10 kΩ - preserves >99% of available output voltage headroom at 5 V supply |
| Input Bias Current | 100 fA typical - minimizes DC error in high-impedance transimpedance circuits (e.g., photodiode amps with RF ≥10 MΩ) |
| Common-Mode Range | −0.3 V to (V+ − 0.3 V) - permits direct ground-referenced input in single-supply 1.8 V–5.5 V applications |
| THD+N | 0.01% at 1 kHz, 600 Ω load - meets fidelity requirements for clinical-grade biomedical signal chains |
Pinout & Package
LMV796MFX/NOPB is housed in a 5-pin SOT-23 package (JEDEC MO-178AA), footprint-compatible with industry-standard pick-and-place equipment and reflow profiles (260°C peak, 10 sec). Thermal resistance θJA = 180°C/W on standard 2-layer PCB.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Amplified signal source/sink node; drives loads down to 600 Ω with rail-to-rail swing |
| 2 | Inverting Input (−) | Differential input node; accepts feedback networks for precise gain control and stability compensation |
| 3 | Non-Inverting Input (+) | High-impedance input node; supports ground-referenced or biased sensor inputs with minimal loading |
| 4 | Ground / Negative Supply | Reference return path; must be low-impedance to minimize PSRR degradation and noise coupling |
| 5 | Positive Supply | Power input for 1.8 V–5.5 V operation; bypass capacitor (0.1 μF ceramic) required within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| Low 1/f noise corner | 400 Hz - ensures flat noise spectral density across audio and physiological frequency bands (0.1–100 Hz) |
| Capacitive load tolerance | Stable with ≥120 pF in unity-gain configuration - eliminates need for external isolation resistors in many sensor buffer designs |
| Guaranteed 2.5 V/5.0 V specs | Full electrical characterization at both voltages - enables seamless migration between Li-ion (3.7 V) and USB-powered (5 V) platforms |
| Automotive qualification option | LMV796Q variant AEC-Q100 Grade 1 qualified - same die, extended test coverage for under-hood temperature cycling |
| Input common-mode capacitance | CCM ≈ 10 pF - predictable parasitic for high-frequency stability analysis in transimpedance topologies |
Applications
| Photodiode Amplifier | Medical ECG Front-End |
|---|---|
Use Scenario: Amplifying nanoampere-level photocurrents from silicon photodiodes in pulse oximetry sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting IPH to VOUT with gain up to 107 V/A and bandwidth >100 kHz. Use Value: 5.8 nV/√Hz noise + 100 fA IB enables detection of sub-100 nA signals with <1 LSB error in 16-bit ADC systems. |
Use Scenario: Buffering and amplifying microvolt-level biopotential signals from dry-electrode ECG leads. IC Role / Device Role / Timing Role: Low-noise, DC-coupled instrumentation amplifier input stage with gain ≥100 and CMRR >80 dB. Use Value: Rail-to-rail output swing into 10 kΩ preserves full dynamic range at 3.3 V supply, reducing ADC quantization loss by 2 bits. |
| Automotive Cabin Air Quality Sensor | Portable Gas Chromatograph Detector |
Use Scenario: Signal conditioning for NDIR CO₂ sensor detectors operating at −40°C to 125°C ambient. IC Role / Device Role / Timing Role: Precision DC-stable amplifier for thermopile output with offset drift <1.0 μV/°C over temperature. Use Value: Guaranteed −40°C to 125°C operation and 1.15 mA quiescent current enable continuous monitoring with <10 μA average system power. |
Use Scenario: Amplifying picoampere-scale current pulses from flame ionization detectors (FID) in handheld GC units. IC Role / Device Role / Timing Role: High-speed, low-bias-current transimpedance stage with 17 MHz GBW for pulse fidelity up to 2 MHz. Use Value: 17 MHz bandwidth + 100 fA IB supports accurate peak-area integration of <500 ns FID pulses without slew-induced distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA376AIDBVR | Lower noise (4.6 nV/√Hz), higher supply current (760 μA), 5.5 MHz GBW | Better for ultra-low-noise DC-coupled applications; insufficient bandwidth for >100 kHz sensor sampling | Select when noise dominates over speed; avoid where >10 MHz closed-loop bandwidth required |
| MCP6V81T-E/OT | Zero-drift architecture, 1.1 μV VOS, 1.6 mA IQ, 10 MHz GBW | Superior DC accuracy and drift; higher current and lower bandwidth limit AC signal fidelity | Prefer for precision weigh scales or pH meters; not recommended for photodiode amps requiring >5 MHz BW |
Compared with OPA376AIDBVR and MCP6V81T-E/OT, LMV796MFX/NOPB uniquely balances 17 MHz bandwidth, 5.8 nV/√Hz noise, and 1.15 mA supply current - making it optimal for wideband, battery-operated sensor interfaces where both speed and noise matter.
Availability
LMV796MFX/NOPB is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation front-ends, and automotive cabin air quality sensors requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LMV796MFX/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 op amp design and high-volume manufacturing.
The LMV796MFX/NOPB belongs to TI's LMV796/LMV797 family of low-noise, low-voltage CMOS op amps engineered specifically for high-fidelity signal acquisition in portable, automotive, and medical devices operating from 1.8 V supplies.
FAQ
What is the maximum capacitive load the LMV796MFX/NOPB can drive without instability?
The LMV796MFX/NOPB is unity-gain stable with up to 120 pF capacitive load, as verified in TI's SNOSAU9D datasheet Figure 39. This allows direct driving of ADC input capacitors, long cables, or LCD bias networks without external isolation resistors. For loads exceeding 120 pF, a series isolation resistor (e.g., 10–100 Ω) between the LMV796MFX/NOPB output and CL restores phase margin. Stability is confirmed across −40°C to 125°C and 1.8 V–5.5 V supply range.
Does the LMV796MFX/NOPB support true rail-to-rail input operation?
No, the LMV796MFX/NOPB does not feature rail-to-rail input. Its input common-mode voltage range extends from −0.3 V to (V+ − 0.3 V), which includes the negative rail (ground in single-supply use) but stops 0.3 V short of V+. This ground-sensing capability enables direct connection of sensors referenced to system ground, but high-side sensing above V+ − 0.3 V requires level-shifting. The LMV796MFX/NOPB output, however, is fully rail-to-rail.
Can the LMV796MFX/NOPB be used in a comparator configuration?
Texas Instruments explicitly advises against using the LMV796MFX/NOPB as a comparator due to internal positive feedback in its output stage, which enhances current drive but compromises open-loop response predictability. The device is characterized and guaranteed only for linear amplifier operation. For comparator functions, TI recommends dedicated comparators such as TLV3201 or LMV7215 - both pin-compatible in SOT-23-5 and optimized for fast, clean transitions.
What is the input referred current noise density of the LMV796MFX/NOPB?
The LMV796MFX/NOPB has an input referred current noise density of 0.01 pA/√Hz at 1 kHz, as specified in the "5V Electrical Characteristics" table of SNOSAU9D. This ultra-low value stems from its CMOS input architecture and makes the LMV796MFX/NOPB exceptionally well-suited for high-impedance transimpedance applications - such as photodiode amplifiers with feedback resistors ≥10 MΩ - where current noise dominates total output noise.
Is the LMV796MFX/NOPB qualified for automotive applications?
The LMV796MFX/NOPB itself is not automotive-qualified; it is the commercial-grade version. However, the functionally identical LMV796Q variant is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on TI's automotive flow. Both share the same SOT-23-5 package, pinout, and electrical specifications - only LMV796Q undergoes additional stress testing and lot traceability per automotive standards. For automotive designs, specify LMV796Q; LMV796MFX/NOPB is intended for industrial and medical applications.
LMV796MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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-23-5
LMV796MFX/NOPB FAQ
1.How can I place an order for LMV796MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV796MFX/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 LMV796MFX/NOPB reliable?
The price and inventory of LMV796MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV796MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV796MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV796MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV796MFX/NOPB?
LMV796MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV796MFX/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 LMV796MFX/NOPB?
For technical support, including LMV796MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV796MFX/NOPB requirements.
6.How does Aetrix verify that LMV796MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV796MFX/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 LMV796MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV796MFX/NOPB?
All LMV796MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV796MFX/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 LMV796MFX/NOPB part is unused and in its original packaging.
Return procedure for LMV796MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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