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Texas Instruments LMV794MMX/NOPB
- Part No.:
- LMV794MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMV794MMX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,382
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Product details
Overview
LMV794MMX/NOPB from Texas Instruments is a dual-channel, decompensated CMOS-input operational amplifier optimized for low-noise, high-speed signal conditioning in 1.8V–5.5V systems. It delivers 88 MHz gain bandwidth at G = +10, 5.8 nV/√Hz input voltage noise at 1 kHz, and rail-to-rail output swing within 25 mV of either rail into 10 kΩ - enabling precision photodiode amplification and ADC driver stages.
For engineers reviewing the LMV794MMX/NOPB datasheet, LMV794MMX/NOPB pinout, LMV794MMX/NOPB application, or LMV794MMX/NOPB equivalent, key selection criteria include its minimum stable gain of 10 V/V, 1.30 mA per channel supply current at 5V, −40°C to +125°C operating range, and SOIC-8 packaging with verified pin compatibility across TI's LMV79x family.
Technical Context
The LMV794MMX/NOPB employs a decompensated two-pole architecture with dominant pole at 1.6 kHz and second pole at 45 MHz, enabling 88 MHz GBW while maintaining 1.30 mA quiescent current per channel. Its CMOS input stage provides 100 fA typical input bias current and 0.01 pA/√Hz current noise density - critical for high-impedance sensor interfaces.
Stability requires closed-loop gain ≥10 V/V or external lead-lag compensation; it is not unity-gain stable. Rail-to-rail output drives ±60 mA and sustains <0.04% THD+N at 1 kHz into 600 Ω, supporting low-distortion buffering in portable medical and instrumentation signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 88 MHz at G = +10 - enables wideband filtering and fast-settling ADC drivers without increasing supply current. |
| Input Voltage Noise Density | 5.8 nV/√Hz at 1 kHz - preserves SNR in low-level sensor front-ends like photodiode transimpedance amplifiers. |
| Supply Current per Channel | 1.30 mA at 5V - supports battery-powered instrumentation with minimal power overhead for high-speed performance. |
| Rail-to-Rail Output Swing | 25 mV from rail into 10 kΩ - maximizes dynamic range in 1.8V–5.5V single-supply systems, reducing headroom loss. |
| Input Bias Current | 100 fA typical - minimizes DC error and leakage-induced drift in high-Z pH sensors, piezoelectric pickups, and capacitive touch interfaces. |
| Operating Temperature Range | −40°C to +125°C - qualified for under-hood automotive sensing, industrial process control, and medical diagnostics equipment. |
| Common-Mode Input Range | Includes negative rail (0 V) - allows ground-referenced single-supply operation without level-shifting circuitry. |
Pinout & Package
LMV794MMX/NOPB is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with standard 1.27 mm pitch, JEDEC MS-012AC compliant footprint, and thermal resistance θJA = 190°C/W on 2-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B (−IN B) | High-impedance CMOS node for feedback network connection in channel B; referenced to V− for common-mode range. |
| 2 | Non-Inverting Input B (+IN B) | High-impedance CMOS node for signal source connection in channel B; accepts inputs down to V− (0 V). |
| 3 | Output B (OUT B) | Rail-to-rail output capable of sourcing/sinking up to 60 mA; drives 600 Ω loads with <0.04% THD+N. |
| 4 | Ground / Negative Supply (V−) | Reference return for both channels; common-mode input includes this rail, enabling true single-supply operation. |
| 5 | Non-Inverting Input A (+IN A) | High-impedance CMOS node for signal source connection in channel A; identical electrical specs to Pin 2. |
| 6 | Inverting Input A (−IN A) | High-impedance CMOS node for feedback network connection in channel A; matched to Pin 1 for dual-channel symmetry. |
| 7 | Output A (OUT A) | Rail-to-rail output identical to Pin 3; supports independent dual-amplifier configurations without crosstalk degradation. |
| 8 | Positive Supply (V+) | Single-supply input accepting 1.8V–5.5V; supplies both channels; PSRR >80 dB across 2.0V–5.5V range. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated architecture | Enables 88 MHz GBW at G = +10 with no increase in quiescent current versus unity-gain-stable alternatives. |
| CMOS input stage | Delivers 100 fA input bias current and 0.01 pA/√Hz current noise - essential for femtoampere-level photodiode and ion-sensor interfaces. |
| Rail-to-rail output | Swings within 25 mV of either rail into 10 kΩ, preserving >95% of full-scale dynamic range in 1.8V systems. |
| Low-voltage operation | Specified performance at 2.5V and 5V; functional down to 1.8V (0°C to 125°C), extending battery life in portable devices. |
| High PSRR and CMRR | ≥80 dB PSRR (2.0V–5.5V) and ≥80 dB CMRR (0V–3.7V common-mode range) - rejects supply ripple and common-mode interference in noisy environments. |
Applications
| Photodiode Amplifiers | ADC Interface |
|---|---|
Use Scenario: Amplifying weak current signals from silicon photodiodes in pulse oximeters or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal added noise and drift. Use Value: 5.8 nV/√Hz input voltage noise and 100 fA input bias current preserve signal integrity from sub-nA photocurrents. | Use Scenario: Driving SAR or sigma-delta ADC inputs in data acquisition modules requiring fast settling and low distortion. IC Role / Device Role / Timing Role: High-speed buffer isolating ADC input from source impedance variations and ensuring full-scale accuracy. Use Value: 88 MHz GBW and 35 V/μs slew rate enable <100 ns settling to 16-bit accuracy with minimal THD+N (0.01% @1 kHz). |
| Active Filters and Buffers | Medical Instrumentation |
Use Scenario: Implementing 2nd-order anti-aliasing or reconstruction filters in portable ultrasound or ECG front-ends. IC Role / Device Role / Timing Role: Dual-channel op amp configuring one channel as filter amplifier and the other as output buffer. Use Value: Matched dual topology ensures consistent phase response; rail-to-rail output maintains filter passband integrity at low supply voltages. | Use Scenario: Signal conditioning in handheld blood glucose meters or portable EEG monitors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Low-power, low-noise amplifier for biopotential signal amplification prior to digitization. Use Value: 1.30 mA per channel supply current and −40°C to +125°C rating support long-life, field-deployable medical hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV794IDR | Same die, SOIC-8 package, but with standard TI tape-and-reel marking (no /NOPB suffix); RoHS-compliant, Pb-free finish. | No functional difference; identical electrical specs, thermal performance, and pinout - suitable for volume production where NOPB marking is not required. | Select LMV794IDR for cost-sensitive, high-volume OEM designs needing standard TI packaging and logistics. |
| OPA2350UA | Unity-gain stable; lower GBW (38 MHz); higher supply current (5.5 mA/ch); 7 nV/√Hz noise; SOIC-8 package. | Supports G = +1 without external compensation but trades bandwidth, power, and noise performance - better for general-purpose buffering than precision high-speed sensing. | Choose OPA2350UA only when unity-gain stability is mandatory and 88 MHz GBW is unnecessary. |
Compared with LMV794IDR, the LMV794MMX/NOPB offers identical performance with guaranteed green (Pb-free/NOPB) compliance for regulated markets; versus OPA2350UA, the LMV794MMX/NOPB delivers >2× bandwidth and <25% supply current at lower noise - making it superior for battery-powered, high-fidelity sensor signal chains.
Availability
LMV794MMX/NOPB is available at Aetrix Electronics and suitable for photodiode amplification, ADC interface circuits, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV794MMX/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 delivering analog, embedded processing, and connectivity solutions with deep expertise in precision amplifiers and low-power signal chain design.
The LMV794MMX/NOPB belongs to TI's LMV79x family of decompensated CMOS op amps, engineered specifically for high-speed, low-noise, low-voltage applications where bandwidth-per-milliamp is critical - such as portable test equipment and energy-efficient sensor nodes.
FAQ
What is the minimum stable gain for LMV794MMX/NOPB?
The LMV794MMX/NOPB requires a minimum closed-loop gain of +10 V/V for unconditional stability without external compensation. This decompensated design enables its 88 MHz gain bandwidth while consuming only 1.30 mA per channel. Attempting unity-gain operation will cause oscillation unless lead-lag compensation is applied per TI's Application Report SNOSAX6D.
Does LMV794MMX/NOPB support rail-to-rail input?
No, the LMV794MMX/NOPB features rail-to-rail *output* but not rail-to-rail *input*. Its input common-mode voltage range extends to the negative rail (V−) but only up to 4 V with a 5 V supply - i.e., VCM = −0.3 V to +4 V. The input stage is CMOS-based, providing high impedance and low bias current, but does not swing fully to V+.
What is the maximum load capacitance LMV794MMX/NOPB can drive without instability?
The LMV794MMX/NOPB can directly drive ≤20 pF capacitive loads while maintaining ≥45° phase margin at G = +10. For larger loads (e.g., ADC input capacitance + PCB trace), TI recommends adding a series resistor (typically 10–50 Ω) between the output and load to isolate capacitance - verified in Figure 33 of the SNOSAX6D datasheet. Exceeding this without isolation risks peaking or ringing.
Is LMV794MMX/NOPB suitable for single-supply 1.8V operation?
Yes, the LMV794MMX/NOPB is fully specified and functional at 1.8V supply for temperatures from 0°C to +125°C, with verified performance including 88 MHz GBW, 5.8 nV/√Hz noise, and rail-to-rail output swing. At −40°C, operation begins at 2.0V - making it ideal for ultra-low-power portable devices powered by single Li-ion or alkaline cells.
How does LMV794MMX/NOPB differ from LMV793MMX/NOPB?
The LMV794MMX/NOPB is the dual-channel variant (two independent amplifiers), while LMV793MMX/NOPB is the single-channel version. Both share identical per-channel specifications: 88 MHz GBW, 5.8 nV/√Hz noise, 100 fA input bias, and SOIC-8 packaging for the LMV794 versus SOT-23-5 or SOIC-8 for the LMV793. Pinout, thermal characteristics, and compensation requirements are identical per channel.
LMV794MMX/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
LMV794MMX/NOPB FAQ
1.How can I place an order for LMV794MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV794MMX/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 LMV794MMX/NOPB reliable?
The price and inventory of LMV794MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV794MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV794MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV794MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV794MMX/NOPB?
LMV794MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV794MMX/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 LMV794MMX/NOPB?
For technical support, including LMV794MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV794MMX/NOPB requirements.
6.How does Aetrix verify that LMV794MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV794MMX/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 LMV794MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV794MMX/NOPB?
All LMV794MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV794MMX/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 LMV794MMX/NOPB part is unused and in its original packaging.
Return procedure for LMV794MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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