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Texas Instruments LMV797MM/NOPB
- Part No.:
- LMV797MM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMV797MM/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,842
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Product details
Overview
LMV797MM/NOPB from Texas Instruments is a dual-channel, low-noise, CMOS-input operational amplifier optimized for 1.8 V to 5.5 V single-supply operation. It delivers 5.8 nV/√Hz input voltage noise density, 17 MHz unity-gain bandwidth, and rail-to-rail output swing within 25 mV of either rail into 10 kΩ - enabling high-fidelity signal conditioning in photodiode amplifiers and portable sensor interfaces.
For engineers reviewing the LMV797MM/NOPB datasheet, LMV797MM/NOPB pinout, LMV797MM/NOPB application, or LMV797MM/NOPB equivalent, key selection criteria include its 100 fA input bias current, guaranteed 2.5 V/5.0 V performance, −40°C to 125°C operating range, and VSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LMV797MM/NOPB employs a CMOS input stage with femtoampere-level bias current and a low 1/f noise corner at 400 Hz, making it suitable for high-impedance, low-level signal sources like photodiodes. Its unity-gain stable architecture supports wideband closed-loop configurations up to 17 MHz without external compensation.
It features rail-to-rail output drive capability (≥60 mA sourcing/sinking), operates down to 1.8 V supply with full specification at 2.5 V and 5.0 V, and maintains ≥75 dB CMRR and PSRR across 1.8–5.5 V supply range - critical for precision analog front-ends in battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 5.8 nV/√Hz at 1 kHz - enables detection of sub-microvolt signals in low-noise sensor chains |
| Unity-Gain Bandwidth | 17 MHz - supports audio preamplification and fast transimpedance gain up to ~10⁶ V/A with stable phase margin |
| Supply Current per Channel | 1.30 mA typical at 5 V - balances speed and power for always-on portable monitoring systems |
| Rail-to-Rail Output Swing | 25 mV from rail into 10 kΩ - maximizes dynamic range in 3.3 V or lower supply systems |
| Input Bias Current | 100 fA typical - preserves signal integrity in high-Z photodiode and piezoelectric sensor interfaces |
| Operating Temperature Range | −40°C to +125°C - qualified for automotive cabin and industrial control environments |
| Total Harmonic Distortion + Noise | 0.01% at 1 kHz, 600 Ω load - meets fidelity requirements for medical-grade analog signal paths |
Pinout & Package
LMV797MM/NOPB is housed in an 8-pin VSSOP (Very Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body size, and exposed thermal pad for enhanced power dissipation in compact layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output channel A; drives loads up to 60 mA while maintaining rail-to-rail swing |
| 2 | IN− A | Inverting input for channel A; high-impedance CMOS node sensitive to layout-induced leakage |
| 3 | IN+ A | Non-inverting input for channel A; includes ground-sensing capability down to V− |
| 4 | V− | Negative supply rail (typically GND in single-supply); common return for both channels |
| 5 | IN+ B | Non-inverting input for channel B; electrically isolated from channel A but shares V− and V+ |
| 6 | IN− B | Inverting input for channel B; matched offset and noise characteristics to channel A |
| 7 | OUT B | Inverting amplifier output channel B; independent output stage with same drive strength as OUT A |
| 8 | V+ | Positive supply rail (1.8–5.5 V); powers both amplifiers and defines output voltage range |
Key Features
| Feature | Design Value |
|---|---|
| Low Input Referred Noise | 5.8 nV/√Hz + 0.01 pA/√Hz enables high-SNR amplification of nanoamp-level photodiode currents |
| CMOS Input Stage | 100 fA input bias current allows direct interfacing with high-impedance sensors without guard rings or bias compensation |
| Rail-to-Rail Output | 25 mV from rail into 10 kΩ preserves >95% of available voltage headroom at 3.3 V supply |
| Wide Supply Range | Operates from 1.8 V (0°C to 125°C) to 5.5 V - supports Li-ion, coin-cell, and regulated 3.3 V/5 V rails |
| Stable Unity-Gain Configuration | No external compensation required; drives ≥120 pF capacitive load without oscillation |
Applications
| Photodiode Amplifier | Active Filter / Buffer |
|---|---|
|
Use Scenario: Amplifying weak current signals from silicon photodiodes in optical smoke detectors or pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier converting 1–100 nA photocurrents into measurable voltage outputs. Use Value: 5.8 nV/√Hz noise floor and 100 fA bias current prevent signal degradation, enabling detection of <100 nA photocurrents at 1 kHz. |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filtering in portable ECG front-ends before ADC sampling. IC Role / Device Role / Timing Role: Dual-channel op amp providing gain, buffering, and filter pole placement with matched channels. Use Value: 17 MHz GBW ensures ≤0.1 dB passband ripple up to 10 kHz with 1% resistor/tolerance components. |
| Medical Instrumentation | Sensor Interface |
|
Use Scenario: Signal conditioning for piezoresistive pressure sensors in disposable blood pressure cuffs. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier in Wheatstone bridge readout circuitry with DC-coupled output. Use Value: ±1.35 mV max input offset and −1.8 μV/°C drift minimize temperature-induced zero-point error over clinical operating range. |
Use Scenario: Interfacing MEMS accelerometers with analog outputs in industrial vibration monitors. IC Role / Device Role / Timing Role: Single-supply rail-to-rail buffer isolating high-impedance sensor output from noisy digital subsystems. Use Value: 2.5 V operation with 25 mV rail margin ensures full-scale output swing even with aging LDOs delivering 2.45 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, dual CMOS op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2376IDGKR | Lower noise (4.5 nV/√Hz), higher quiescent current (750 µA/channel), SOIC-8 package | Better SNR in ultra-low-noise audio; less suitable for battery life–critical designs | Choose when noise dominates over power; verify SOIC-8 footprint compatibility |
| MCP6V82-E/SN | Zero-drift architecture, 6 µV max VOS, 1.2 MHz GBW, same VSSOP-8 package | Superior DC accuracy for precision DC-coupled sensors; insufficient bandwidth for >100 kHz AC signals | Prefer for strain gauge or thermopile interfaces requiring <1 µV/°C drift; avoid for photodiode AC response |
Compared with OPA2376IDGKR and MCP6V82-E/SN, the LMV797MM/NOPB uniquely balances 17 MHz bandwidth, 5.8 nV/√Hz noise, and 1.3 mA/channel supply current in a space-saving VSSOP-8 - making it optimal for wideband, low-power sensor signal chains where both speed and noise matter.
Availability
LMV797MM/NOPB is available at Aetrix Electronics and suitable for photodiode amplifiers, active filters, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV797MM/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 amps and low-power signal chain solutions.
The LMV797MM/NOPB belongs to TI's LMV79x family of low-noise, low-voltage CMOS op amps designed specifically for high-fidelity, battery-operated sensor interface and portable instrumentation applications.
FAQ
What is the maximum capacitive load the LMV797MM/NOPB can drive without instability?
The LMV797MM/NOPB can directly drive up to 120 pF in unity-gain configuration without oscillation, as verified in TI's stability testing. For heavier loads, an isolation resistor (RISO) between the output and CL is recommended to preserve phase margin. This capability simplifies PCB layout in transimpedance amplifier designs where photodiode junction capacitance must be buffered without added complexity. The LMV797MM/NOPB's internal compensation ensures robustness across 1.8–5.5 V supply range.
Does the LMV797MM/NOPB support true rail-to-rail input common-mode range?
The LMV797MM/NOPB supports rail-to-rail output swing but has an input common-mode voltage range extending to V− (ground) and up to V+ − 1.2 V - not full rail-to-rail input. Its CMOS inputs include the negative rail, enabling ground-referenced sensing in single-supply operation, but the upper limit is limited by input stage headroom. This design prioritizes low input bias current and noise over full input range, making it ideal for sensor interfaces where the signal stays near ground.
Is the LMV797MM/NOPB qualified for automotive applications?
The LMV797MM/NOPB is not automotive-qualified; only the LMV797Q variant carries AEC-Q100 Grade 1 qualification. The LMV797MM/NOPB is rated for −40°C to +125°C operation and meets industrial reliability standards, but lacks the extended test coverage, traceability, and failure rate reporting required for automotive safety-critical systems. For cabin or infotainment subsystems with non-safety requirements, engineering validation may be acceptable - however, LMV797Q is mandatory for ASIL-compliant designs.
How does the LMV797MM/NOPB's noise performance compare at 2.5 V versus 5 V supply?
The LMV797MM/NOPB maintains consistent 5.8 nV/√Hz input voltage noise density at both 2.5 V and 5 V supplies, as confirmed in TI's electrical characteristics tables. Current noise remains at 0.01 pA/√Hz across the full 1.8–5.5 V range. This supply-independent noise behavior results from its CMOS input architecture and enables predictable SNR scaling in multi-rail systems - unlike bipolar-input op amps whose noise degrades at lower voltages.
Can the LMV797MM/NOPB be used in open-loop comparator configurations?
No - the LMV797MM/NOPB is not intended for open-loop use as a comparator. Its internal architecture includes positive feedback to boost output drive, which compromises stability and propagation delay predictability in saturated operation. TI explicitly advises against using the LMV797MM/NOPB as a comparator. For threshold detection, a dedicated comparator such as TLV3201 or LMV7215 should be selected to ensure clean edges, defined hysteresis, and guaranteed response time - all of which the LMV797MM/NOPB cannot provide.
LMV797MM/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:
- 11.5V/µs
- Gain Bandwidth Product:
- 17 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.3mA (x2 Channels)
- 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:
- 8-VSSOP
LMV797MM/NOPB FAQ
1.How can I place an order for LMV797MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV797MM/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 LMV797MM/NOPB reliable?
The price and inventory of LMV797MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV797MM/NOPB is usually 5 days.
3.What payment methods are accepted for LMV797MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV797MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV797MM/NOPB?
LMV797MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV797MM/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 LMV797MM/NOPB?
For technical support, including LMV797MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV797MM/NOPB requirements.
6.How does Aetrix verify that LMV797MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV797MM/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 LMV797MM/NOPB meets industry standards.
7.What is the process for return or replacement of LMV797MM/NOPB?
All LMV797MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV797MM/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 LMV797MM/NOPB part is unused and in its original packaging.
Return procedure for LMV797MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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