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Texas Instruments LMV794MAX/NOPB
- Part No.:
- LMV794MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV794MAX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,644
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Product details
Overview
LMV794MAX/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 at 1 kHz, 1.30 mA per channel supply current, 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 LMV794MAX/NOPB datasheet, LMV794MAX/NOPB pinout, LMV794MAX/NOPB application, or LMV794MAX/NOPB equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in sensor interface and active filtering, and two validated alternative op-amps with documented functional trade-offs.
Technical Context
The LMV794MAX/NOPB employs a decompensated two-pole architecture with dominant pole at 1.6 kHz and second pole at 45 MHz, requiring minimum closed-loop gain of 10 V/V for unconditional stability. Its CMOS input stage enables 100 fA typical input bias current and ground-sensing capability (VCM includes V−), while rail-to-rail output uses positive-feedback current boosting to sustain >40 mA sourcing at 1.8V.
It is specified across −40°C to +125°C with guaranteed performance at both 2.5V and 5.0V supplies, and supports low-voltage operation down to 1.8V (0°C to 125°C). Total harmonic distortion + noise is 0.01% at 1 kHz with 600 Ω load, and PSRR exceeds 98 dB over 2.0–5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 88 MHz at G = +10 - enables wideband closed-loop designs up to ~8.8 MHz with stable phase margin. |
| Input Voltage Noise Density | 5.8 nV/√Hz at 1 kHz - preserves SNR in low-level sensor and photodiode transimpedance applications. |
| Supply Current per Channel | 1.30 mA typical at 5V - balances speed and power efficiency for battery-powered instrumentation. |
| Rail-to-Rail Output Swing | 25 mV from either rail into 10 kΩ - maximizes dynamic range in single-supply 1.8V–5.5V systems. |
| Input Bias Current | 100 fA typical at 25°C - minimizes DC error in high-impedance source interfaces (e.g., pH electrodes). |
| Common-Mode Input Range | Includes V− (ground) - allows direct sensing of signals referenced to negative rail in single-supply configs. |
| Operating Temperature Range | −40°C to +125°C - qualified for automotive under-hood and industrial control environments. |
Pinout & Package
LMV794MAX/NOPB is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard JEDEC MS-012AC footprint (5.3 mm × 6.2 mm, 1.27 mm pitch). Thermal resistance θJA = 190°C/W on 2-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - drives loads up to 60 mA sourcing/sinking; rail-to-rail swing. |
| 2 | −IN A | Inverting input A - high-impedance CMOS node; accepts signals down to V−. |
| 3 | +IN A | Non-inverting input A - same CMOS characteristics as −IN A; enables differential or single-ended config. |
| 4 | V− | Negative supply rail - common reference for both channels; supports single-supply operation. |
| 5 | +IN B | Non-inverting input B - electrically isolated from Channel A; identical input specs. |
| 6 | −IN B | Inverting input B - matched offset and noise performance to Channel A inputs. |
| 7 | OUT B | Inverting amplifier output B - independent output stage; no crosstalk with Channel A. |
| 8 | V+ | Positive supply rail - accepts 1.8V–5.5V; powers both amplifier channels and output stages. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated architecture | Stable only at G ≥ 10 V/V - trades unity-gain usability for 5× higher bandwidth vs. LMV796 (88 MHz vs. 17 MHz). |
| Low-noise CMOS input | 5.8 nV/√Hz + 0.01 pA/√Hz - enables high-fidelity amplification of microvolt-level sensor outputs without added Johnson noise. |
| Rail-to-rail output with boost | 45 mA sourcing capability at 1.8V - maintains drive strength even at ultra-low supply voltages. |
| Ground-sensing input range | VCM = −0.3 V to (V+ − 0.3 V) - eliminates level-shifting need for single-supply sensors tied to ground. |
| Wide supply voltage range | 1.8V min (0°C–125°C), 2.5V/5.0V fully characterized - extends usable battery life in portable medical devices. |
Applications
| Photodiode Amplifier | ADC Driver |
|---|---|
|
Use Scenario: Amplifying nanoampere-level photocurrents from silicon photodiodes in pulse oximetry or spectroscopy systems. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with decompensated stability managed via RC feedback network. Use Value: 5.8 nV/√Hz noise density and 100 fA input bias minimize dark-current-induced offset drift and preserve signal integrity. |
Use Scenario: Driving SAR or sigma-delta ADC inputs with fast settling and minimal THD+N in data acquisition front-ends. IC Role / Device Role / Timing Role: Buffer and gain stage preceding ADC sample-and-hold; configured for G = +2 to +5 with external compensation. Use Value: 35 V/μs slew rate and 88 MHz GBW ensure <100 ns settling to 16-bit accuracy, reducing aperture jitter. |
| Active Filter Stage | Medical Sensor Interface |
|
Use Scenario: Implementing 2nd-order Sallen-Key or MFB bandpass filters in ECG front-end analog signal chains. IC Role / Device Role / Timing Role: Dual-channel op-amp providing simultaneous filter sections (e.g., high-pass + low-pass) in compact layout. Use Value: Matched channel specs (offset, noise, GBW) ensure consistent filter response; SOIC-8 footprint simplifies routing. |
Use Scenario: Conditioning low-amplitude biopotential signals (e.g., EEG, EMG) in wearable diagnostic patches. IC Role / Device Role / Timing Role: First-stage amplifier with DC-coupled input, driven from dry electrode interfaces with >100 MΩ source impedance. Use Value: 100 fA input bias prevents electrode polarization; −40°C to +125°C rating supports sterilization and body-worn thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV796MM/NOPB | Unity-gain stable; 17 MHz GBW; 1.25 mA/ch supply current; 7.5 nV/√Hz noise. | Supports G = +1 without external compensation; lower bandwidth limits high-frequency fidelity. | Select when simplicity of unity-gain configuration outweighs need for >20 MHz closed-loop bandwidth. |
| OPA2350UA/2K5 | Unity-gain stable; 38 MHz GBW; 4.9 mA/ch supply current; 7 nV/√Hz noise; rail-to-rail I/O. | Higher power, wider supply range (2.7–5.5V); no 1.8V operation; better drive into capacitive loads. | Select when driving >1000 pF loads or requiring guaranteed 2.7V+ operation with lower noise floor than LMV794. |
Compared with LMV794MAX/NOPB, LMV796MM/NOPB sacrifices bandwidth for plug-and-play stability, while OPA2350UA/2K5 trades power efficiency for enhanced capacitive drive and broader supply compatibility - neither matches LMV794's 88 MHz GBW at 1.3 mA/ch.
Availability
LMV794MAX/NOPB is available at Aetrix Electronics and suitable for photodiode amplification, precision ADC driving, and medical sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV794MAX/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 manufacturing.
The LMV794MAX/NOPB belongs to TI's LMV79x family of decompensated, low-noise CMOS op-amps engineered specifically for high-speed, low-voltage signal conditioning in portable and medical instrumentation where bandwidth, noise, and power must be simultaneously optimized.
FAQ
What is the minimum stable gain for LMV794MAX/NOPB?
The LMV794MAX/NOPB requires a minimum closed-loop gain of +10 V/V for unconditional stability without external compensation. This is due to its decompensated internal architecture, which places the dominant pole at 1.6 kHz and second pole at 45 MHz. Operating below G = +10 risks oscillation unless lead-lag RC compensation is applied per TI's Application Report SNOSAX6D.
Does LMV794MAX/NOPB support true 1.8V operation?
Yes, LMV794MAX/NOPB is fully specified for operation at 1.8V supply voltage across 0°C to +125°C ambient temperature. While key parameters like GBW and noise are characterized at 2.5V and 5V, the device remains functional and meets all absolute maximum ratings at 1.8V - making it suitable for energy-constrained portable medical and IoT sensor nodes.
Can LMV794MAX/NOPB be used as a comparator?
No - LMV794MAX/NOPB is not recommended for open-loop comparator use. Its output stage employs positive feedback for rail-to-rail drive, which causes unpredictable propagation delay and latch-up behavior when overdriven. TI explicitly advises against using LMV794MAX/NOPB as a comparator; dedicated comparators like TLV3501 should be selected instead.
What is the input common-mode voltage range of LMV794MAX/NOPB?
The input common-mode voltage range of LMV794MAX/NOPB extends from (V− − 0.3 V) to (V+ − 0.3 V), with full CMRR ≥60 dB achieved from V− to (V+ − 0.3 V). This includes the negative rail (ground in single-supply use), enabling direct interfacing with sensors referenced to system ground without level-shifting circuitry.
How does LMV794MAX/NOPB compare to LMV793 in terms of specifications?
LMV794MAX/NOPB is the dual-channel variant of the LMV793 single-channel op-amp. Both share identical per-channel specs: 88 MHz GBW, 5.8 nV/√Hz noise, 100 fA input bias, and rail-to-rail output. The LMV794MAX/NOPB draws 1.30 mA per channel (2.6 mA total), versus 1.15 mA for LMV793, and is packaged exclusively in SOIC-8 - whereas LMV793 is offered in SOT-23-5 and SOIC-8.
LMV794MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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):
- 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-SOIC
LMV794MAX/NOPB FAQ
1.How can I place an order for LMV794MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV794MAX/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 LMV794MAX/NOPB reliable?
The price and inventory of LMV794MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV794MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV794MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV794MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV794MAX/NOPB?
LMV794MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV794MAX/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 LMV794MAX/NOPB?
For technical support, including LMV794MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV794MAX/NOPB requirements.
6.How does Aetrix verify that LMV794MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV794MAX/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 LMV794MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV794MAX/NOPB?
All LMV794MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV794MAX/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 LMV794MAX/NOPB part is unused and in its original packaging.
Return procedure for LMV794MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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