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Texas Instruments LMV794MA/NOPB
- Part No.:
- LMV794MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV794MA/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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Product details
Overview
LMV794MA/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, and rail-to-rail output swing within 25 mV of either rail into 10 kΩ - enabling precision photodiode amplification and ADC driver stages in portable medical sensors.
For engineers reviewing the LMV794MA/NOPB datasheet, LMV794MA/NOPB pinout, LMV794MA/NOPB application, or LMV794MA/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 - all critical for low-voltage, wideband analog front-end design where noise, power, and thermal robustness are constrained.
Technical Context
The LMV794MA/NOPB uses 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 input current noise - essential for high-impedance sensor interfaces.
Stability requires closed-loop gain ≥10 V/V without external compensation; lead-lag RC networks enable stable operation down to unity gain. Rail-to-rail output drives 60 mA sourcing/sinking capability and maintains THD+N ≤0.01% at 1 kHz into 600 Ω - supporting high-fidelity buffering in battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 88 MHz at G = +10 - enables wideband active filters 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 photodiode or strain gauge signal chains. |
| Supply Current per Channel | 1.30 mA at 5V - supports dual-channel amplification in space-constrained, thermally sensitive designs. |
| Rail-to-Rail Output Swing | 25 mV from rail into 10 kΩ - maximizes dynamic range in 2.5V/3.3V systems, reducing headroom loss by >50% vs. legacy op amps. |
| Input Bias Current | 100 fA typical - minimizes voltage error across high-value feedback resistors (e.g., ≥10 MΩ) in transimpedance configurations. |
| Operating Temperature Range | −40°C to +125°C - qualified for under-hood automotive sensors and industrial process monitoring. |
| Common-Mode Input Range | Includes negative rail (0 V) - allows ground-referenced single-supply sensing without level-shifting circuitry. |
Pinout & Package
LMV794MA/NOPB is housed in an 8-pin SOIC package (SOIC-8, body width 3.9 mm), compliant with JEDEC MS-012. Thermal resistance θJA = 190°C/W on standard 2-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - drives loads up to 60 mA sourcing/sinking; connects directly to ADC input or filter stage. |
| 2 | −IN A | Inverting input A - high-impedance CMOS node; requires matched trace routing to minimize imbalance-induced offset drift. |
| 3 | +IN A | Non-inverting input A - accepts ground-referenced signals; common-mode range extends to V− (0 V). |
| 4 | V− | Negative supply rail - shared return for both amplifiers; must be low-impedance to avoid crosstalk between channels. |
| 5 | +IN B | Non-inverting input B - independent of Channel A; enables differential pair or dual-path signal processing. |
| 6 | −IN B | Inverting input B - isolated from Channel A inputs; supports separate feedback networks without interaction. |
| 7 | OUT B | Inverting amplifier output B - electrically identical to Pin 1; usable for redundant paths or multi-stage gain distribution. |
| 8 | V+ | Positive supply rail - accepts 1.8V–5.5V; bypass capacitor (0.1 µF ceramic) required within 5 mm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated architecture | Enables 88 MHz GBW at 1.30 mA/channel - 5× wider bandwidth than unity-gain-stable LMV796 (17 MHz) at same power. |
| CMOS input stage | 100 fA input bias current - eliminates resistor-induced offset errors in 100 MΩ+ transimpedance gains used in photodiode amps. |
| Rail-to-rail output | 25 mV from rail into 10 kΩ - delivers full 2.4 VPP swing from 2.5 V supply, maximizing resolution in 12-bit+ ADCs. |
| Low-voltage operation | Specified performance at 1.8 V (0°C to 125°C) and 2.5 V/5 V - extends battery life in portable ECG, pulse oximeter, and IoT edge nodes. |
| High PSRR/CMRR | ≥98 dB PSRR and ≥94 dB CMRR at 2.5 V - rejects supply ripple and common-mode interference in noisy industrial environments. |
Applications
| Photodiode Amplifier | ADC Driver |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximetry or spectroscopy systems. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal added noise. Use Value: 5.8 nV/√Hz input voltage noise and 100 fA bias current preserve signal integrity at gains ≥106 V/A. |
Use Scenario: Driving SAR or sigma-delta ADC inputs in portable data loggers with 12–16-bit resolution. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer isolating sensor front-end from ADC sampling kickback. Use Value: 0.01% THD+N at 1 kHz and 35 V/µs slew rate ensure accurate settling before conversion window closes. |
| Active Filter Stage | Medical Sensor Interface |
Use Scenario: Implementing 2nd-order anti-aliasing or reconstruction filters in ultrasound beamforming ASICs. IC Role / Device Role / Timing Role: Gain stage in multiple-feedback (MFB) or state-variable topology with precise Q-factor control. Use Value: 88 MHz GBW supports filter cutoffs up to 10 MHz while maintaining phase linearity and group delay flatness. |
Use Scenario: Conditioning signals from piezoresistive pressure sensors or MEMS accelerometers in wearable monitors. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end with rail-to-rail output compliance. Use Value: −1.8 µV/°C input offset drift and −40°C to +125°C operation ensure calibration stability across environmental extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV794MM/NOPB | VSSOP-8 package (2.3 × 2.0 mm); θJA = 236°C/W; identical electrical specs. | Better suited for ultra-compact PCBs where board area is constrained; requires tighter layout controls for thermal management. | Select LMV794MM/NOPB when footprint reduction outweighs thermal derating needs; LMV794MA/NOPB preferred for higher-power or convection-cooled layouts. |
| OPA2350UA/2K5 | Unity-gain stable; 38 MHz GBW; 7 nV/√Hz noise; 5.5 mA supply current per channel. | Lower bandwidth but simpler to use in G = +1 configurations; higher power disqualifies it for battery-operated devices. | Choose OPA2350UA/2K5 only when decompensation complexity is unacceptable and 38 MHz bandwidth suffices; LMV794MA/NOPB remains superior for >50 MHz signal chains. |
Compared with LMV794MM/NOPB, LMV794MA/NOPB offers lower thermal resistance and easier hand-soldering, while OPA2350UA/2K5 trades bandwidth and power efficiency for unity-gain simplicity - making LMV794MA/NOPB the optimal choice for compact, high-fidelity, low-power analog front-ends requiring ≥80 MHz bandwidth.
Availability
LMV794MA/NOPB is available at Aetrix Electronics and suitable for photodiode amplification, ADC driver stages, and active filter design requiring stable component supply, long-term manufacturability, and guaranteed TI production continuity through 2030.
Supply support for LMV794MA/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 50 years of op amp innovation and broad automotive, industrial, and personal electronics market presence.
The LMV794MA/NOPB belongs to TI's LMV79x family of decompensated, low-noise, low-voltage op amps - engineered specifically for high-bandwidth, low-power signal conditioning in portable medical, test equipment, and sensor interface applications.
FAQ
What is the minimum stable gain for LMV794MA/NOPB without external compensation?
The LMV794MA/NOPB requires a minimum closed-loop gain of +10 V/V (20 dB) to ensure unconditional stability without external components. Operating below this gain risks oscillation due to its decompensated architecture - confirmed by its 45 MHz second pole and near-zero phase margin at unity gain. External lead-lag RC compensation is mandatory for G < +10 configurations.
Does LMV794MA/NOPB support true rail-to-rail input common-mode range?
No - LMV794MA/NOPB features rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode voltage range extends to the negative rail (V− = 0 V) but only up to 1.5 V at 2.5 V supply and 4 V at 5 V supply, as specified in the CMVR parameter. This ground-sensing capability enables single-supply sensor interfacing, but positive input voltages must remain within those limits.
Can LMV794MA/NOPB drive a 600 Ω load effectively?
Yes - LMV794MA/NOPB sources/sinks up to 60 mA, enabling direct drive of 600 Ω loads with ≤45 mV from rail swing (at 2 kΩ) and ≤25 mV from rail (at 10 kΩ). At 600 Ω, output swing is typically 75–82 mV from rail per datasheet Figures 19–23, delivering >4 VPP into 600 Ω at 5 V supply - sufficient for line-driver and audio-buffer roles.
What is the input referred voltage noise of LMV794MA/NOPB at 10 kHz?
LMV794MA/NOPB exhibits 5.8 nV/√Hz input referred voltage noise at 1 kHz (typical, 5 V supply), rising slightly to ~6.2 nV/√Hz at 10 kHz per Figure 27 in the datasheet. This frequency-independent behavior confirms its suitability for broadband applications up to ~100 kHz where noise contribution remains dominated by the 5.8–6.2 nV/√Hz floor.
Is LMV794MA/NOPB pin-compatible with other TI dual op amps like LMV722?
No - LMV794MA/NOPB is not pin-compatible with LMV722 or other standard dual op amps. Its SOIC-8 pinout (OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, V+) differs from industry-standard configurations (e.g., LMV722 uses +IN A, −IN A, OUT A, V−, V+, −IN B, +IN B, OUT B). PCB layout must follow TI's LMV794-specific footprint.
LMV794MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LMV794MA/NOPB FAQ
1.How can I place an order for LMV794MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV794MA/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 LMV794MA/NOPB reliable?
The price and inventory of LMV794MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV794MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMV794MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV794MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV794MA/NOPB?
LMV794MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV794MA/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 LMV794MA/NOPB?
For technical support, including LMV794MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV794MA/NOPB requirements.
6.How does Aetrix verify that LMV794MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV794MA/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 LMV794MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMV794MA/NOPB?
All LMV794MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV794MA/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 LMV794MA/NOPB part is unused and in its original packaging.
Return procedure for LMV794MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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