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Texas Instruments LMV794MM/NOPB
- Part No.:
- LMV794MM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMV794MM/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,966
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Product details
Overview
LMV794MM/NOPB from Texas Instruments is a dual-channel, decompensated CMOS-input operational amplifier optimized for high-speed, low-noise signal conditioning in 1.8V–5.5V systems. It delivers 88 MHz gain bandwidth at G = +10, 5.8 nV/√Hz input voltage noise, 1.30 mA per channel supply current, and rail-to-rail output swing within 25 mV of either rail (10 kΩ load). It is used in photodiode transimpedance amplifiers and precision ADC front-ends where speed and low input bias current (<100 fA) are critical.
For engineers reviewing the LMV794MM/NOPB datasheet, LMV794MM/NOPB pinout, LMV794MM/NOPB application, or LMV794MM/NOPB equivalent, key selection considerations include its minimum stable gain of 10 V/V, decompensated architecture requiring external compensation below G = 10, guaranteed 2.5V/5.0V performance, −40°C to +125°C operating range, and SOIC-8 packaging with verified pinout and thermal resistance (θJA = 190°C/W).
Technical Context
The LMV794MM/NOPB employs a decompensated two-pole open-loop architecture with dominant pole at 1.6 kHz and second pole at 45 MHz, enabling 88 MHz GBW while maintaining low quiescent current. Its CMOS input stage provides femtoampere-level bias current and ground-sensing common-mode range (−0.3 V to V+ − 0.3 V), supporting single-supply sensor interfacing.
Stability requires closed-loop gain ≥10 V/V or external lead-lag compensation (RC network); unity-gain operation is not inherently stable. Output stage delivers ±45 mA sourcing/sinking capability and rail-to-rail swing into 2 kΩ and 10 kΩ loads, with THD+N of 0.01% at 1 kHz (600 Ω).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 88 MHz at G = +10 - enables wideband filtering and fast settling in data acquisition front-ends. |
| Input Voltage Noise Density | 5.8 nV/√Hz at 1 kHz - preserves SNR in low-level sensor and photodiode amplification. |
| Supply Current per Channel | 1.30 mA typical at 5V - supports battery-powered instrumentation without sacrificing bandwidth. |
| Input Bias Current | 100 fA max at 125°C - minimizes DC error in high-impedance source applications (e.g., pH sensors). |
| Rail-to-Rail Output Swing | 25 mV from rail (10 kΩ) - maximizes dynamic range in low-voltage (1.8V–2.5V) systems. |
| Common-Mode Input Range | −0.3 V to V+ − 0.3 V - allows direct ground-referenced sensing in single-supply configurations. |
| Operating Temperature Range | −40°C to +125°C - qualified for automotive under-hood and industrial control environments. |
Pinout & Package
LMV794MM/NOPB is housed in an 8-pin SOIC package (SOIC-8, body width 3.9 mm), with θJA = 190°C/W and moisture sensitivity level (MSL) 1. Pin functions are validated per TI SNOSAX6D Rev. MARCH 2013.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output channel A; drives loads up to 60 mA with rail-to-rail swing. |
| 2 | −IN A | Inverting input for channel A; high-impedance CMOS node with <100 fA bias current. |
| 3 | +IN A | Non-inverting input for channel A; supports common-mode range down to −0.3 V. |
| 4 | V− | Negative supply rail (GND in single-supply); shared return path for both amplifiers. |
| 5 | +IN B | Non-inverting input for channel B; electrically isolated but thermally coupled to channel A. |
| 6 | −IN B | Inverting input for channel B; identical electrical specs to pin 2. |
| 7 | OUT B | Inverting amplifier output channel B; independent output stage with same drive capability as pin 1. |
| 8 | V+ | Positive supply rail (1.8V–5.5V); powers both channels and sets output swing limits. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated architecture | Enables 88 MHz GBW at G = +10 with only 1.30 mA/channel - 5× bandwidth vs. unity-gain-stable LMV796 (17 MHz) at equal power. |
| CMOS input stage | 100 fA max input bias current at 125°C - eliminates resistive loading errors in >100 MΩ sensor interfaces. |
| Rail-to-rail output | 25 mV from rail into 10 kΩ at 25°C - preserves >95% of full-scale dynamic range in 2.5V systems. |
| Low-noise design | 5.8 nV/√Hz input voltage noise at 1 kHz - maintains signal integrity in photodiode and microphone preamps. |
| Wide supply range | Operates from 1.8V (0°C–125°C) to 5.5V - supports multi-battery and USB-powered portable instrumentation. |
Applications
| Photodiode Transimpedance Amplifier | High-Speed ADC Driver |
|---|---|
|
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 photocurrent to voltage with minimal added noise and drift. Use Value: 5.8 nV/√Hz noise density and 100 fA input bias current preserve signal-to-noise ratio for sub-nA photocurrents. |
Use Scenario: Driving SAR or sigma-delta ADC inputs in portable data loggers requiring fast settling and low distortion. IC Role / Device Role / Timing Role: Buffer and gain stage ensuring full-scale step response settles within 100 ns to 0.01%. Use Value: 88 MHz GBW and 35 V/μs slew rate enable clean 1 MSPS sampling with <0.01% THD+N at 1 kHz. |
| Active Low-Pass Filter (100 kHz) | Medical ECG Front-End |
|
Use Scenario: 4th-order active anti-aliasing filter preceding audio-grade ADCs in hearing aids and voice recorders. IC Role / Device Role / Timing Role: Dual op-amp implementing cascaded Sallen-Key stages with matched channel performance. Use Value: Matched offset drift (−1.8 μV/°C) and CMRR >94 dB minimize inter-stage DC error accumulation. |
Use Scenario: First-stage amplification of microvolt-level ECG signals in wearable monitors with dry electrodes. IC Role / Device Role / Timing Role: Instrumentation-grade dual amplifier providing differential gain and common-mode rejection. Use Value: −40°C to +125°C rating ensures reliability during sterilization cycles; rail-to-rail output maximizes ADC utilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV794IDR | Same die, SOIC-8 package, no Pb-free marking (RoHS-compliant but not NOPB suffix); identical electrical specs. | No functional difference; suitable for cost-sensitive industrial designs where Pb-free labeling is not required. | Select LMV794IDR if RoHS compliance suffices without JEDEC-standard Pb-free finish documentation. |
| OPA2350UA | Unity-gain stable; lower GBW (38 MHz); higher supply current (5.5 mA/ch); 7 nV/√Hz noise. | Better for G ≤ 1 applications without external compensation; less suitable for >50 MHz closed-loop bandwidth needs. | Choose OPA2350UA only when simplicity of unity-gain operation outweighs need for 88 MHz bandwidth and 1.3 mA efficiency. |
Compared with LMV794IDR, LMV794MM/NOPB offers identical performance with certified Pb-free finish for medical and automotive end-equipment. Compared with OPA2350UA, LMV794MM/NOPB delivers >2× bandwidth and <25% supply current at G = +10, but requires gain ≥10 or external RC compensation for stability.
Availability
LMV794MM/NOPB is available at Aetrix Electronics and suitable for photodiode amplifiers, high-speed ADC drivers, and medical ECG front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV794MM/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 over 90 years of innovation in precision amplifiers and signal chain solutions.
The LMV794MM/NOPB belongs to TI's LMV79x family of decompensated, low-noise, CMOS-input op amps designed specifically for high-bandwidth, low-power sensor signal conditioning in portable and industrial instrumentation.
FAQ
What is the minimum stable gain for LMV794MM/NOPB?
The LMV794MM/NOPB is decompensated and requires a minimum closed-loop gain of +10 V/V (20 dB) for unconditional stability without external compensation. Operating at gains below +10 necessitates lead-lag RC compensation per TI SNOSAX6D Figure 44. This architecture enables its 88 MHz GBW while maintaining 1.30 mA per channel supply current - a trade-off for higher speed versus unity-gain flexibility.
Does LMV794MM/NOPB support rail-to-rail input?
No, LMV794MM/NOPB does not support rail-to-rail input. Its input common-mode voltage range is specified from −0.3 V to V+ − 0.3 V (e.g., −0.3 V to 4.7 V at 5V supply), which includes ground but excludes the positive rail. This ground-sensing capability enables single-supply operation with DC-coupled sensors, but it cannot accept input signals at V+ or above.
What is the maximum output current capability of LMV794MM/NOPB?
LMV794MM/NOPB can source up to 45 mA and sink up to 21 mA into the negative rail (V−) when V+ = 5V and TA = 25°C, per the 5V Electrical Characteristics table. Output current decreases with lower supply voltage and elevated temperature; at 1.8V supply, sourcing capability drops to ~37 mA. These values assume momentary test conditions (1.5 ms pulse) and require proper PCB thermal design.
Is LMV794MM/NOPB suitable for use as a comparator?
No, LMV794MM/NOPB is not recommended for open-loop comparator operation. Its output stage uses positive feedback to enhance drive strength, which compromises phase margin and causes unpredictable overdrive recovery and latch-up behavior. TI explicitly states in the APPLICATION INFORMATION section that usage in open-loop configuration is not recommended. Use dedicated comparators (e.g., TLV3501) instead.
What package variants are available for LMV794MM/NOPB?
LMV794MM/NOPB is exclusively offered in the 8-pin SOIC package (SOIC-8, 3.9 mm body width, JEDEC MS-012), with thermal resistance θJA = 190°C/W. The dual-channel LMV794 is not available in VSSOP or other footprints; the single-channel LMV793 is offered in SOT-23-5 and SOIC-8, but LMV794MM/NOPB is SOIC-8 only.
LMV794MM/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:
- 35V/µs
- Gain Bandwidth Product:
- 88 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):
- 2 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
LMV794MM/NOPB FAQ
1.How can I place an order for LMV794MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV794MM/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 LMV794MM/NOPB reliable?
The price and inventory of LMV794MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV794MM/NOPB is usually 5 days.
3.What payment methods are accepted for LMV794MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV794MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV794MM/NOPB?
LMV794MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV794MM/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 LMV794MM/NOPB?
For technical support, including LMV794MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV794MM/NOPB requirements.
6.How does Aetrix verify that LMV794MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV794MM/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 LMV794MM/NOPB meets industry standards.
7.What is the process for return or replacement of LMV794MM/NOPB?
All LMV794MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV794MM/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 LMV794MM/NOPB part is unused and in its original packaging.
Return procedure for LMV794MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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