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Texas Instruments LMV301MGX
- Part No.:
- LMV301MGX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV301MGX.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
LMV301MGX from Texas Instruments is a CMOS-input, rail-to-rail output operational amplifier optimized for low-voltage, single-supply operation (1.8 V to 5 V), featuring 0.182 pA typical input bias current, 1 MHz gain bandwidth product, 150 µA supply current at 1.8 V, 40 nV/√Hz input voltage noise at 1 kHz, and 100 dB DC open-loop gain - ideal for high-impedance sensor signal conditioning in portable battery-powered systems.
For engineers reviewing the LMV301MGX datasheet, LMV301MGX pinout, LMV301MGX application, or LMV301MGX equivalent, this page delivers verified technical context, SC70-5 package mapping, real-world electrometer-grade performance constraints, and validated alternative options for low-leakage analog front-end design.
Technical Context
The LMV301MGX employs a CMOS input stage enabling sub-picoampere input bias current, critical for transimpedance amplifiers where leakage dominates error budgets. Its rail-to-rail output swing (e.g., 0.024 V to 1.77 V at 1.8 V supply) and ground-sensing input common-mode range (−0.3 V to +1.2 V) support true single-supply signal acquisition without level-shifting circuitry.
It achieves stable unity-gain operation into 600 Ω resistive loads and up to 1000 pF capacitive loads when compensated per TI's recommended RC network (e.g., 50–100 Ω series output resistor + 5–10 pF feedback capacitor), with phase margin maintained ≥60° across 1.8–5 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 0.182 pA typical - enables <1 mV input offset error in 10 GΩ photodiode transimpedance configurations |
| Supply Voltage Range | 1.8 V to 5.0 V - supports direct interfacing with Li-ion (3.0–4.2 V) and two-cell alkaline (2.4–3.2 V) battery systems |
| Gain Bandwidth Product | 1 MHz - provides usable bandwidth for ≤100 kHz sensor signals while maintaining low power (150 µA) |
| Input Voltage Noise | 40 nV/√Hz at 1 kHz - limits detectable signal floor to ~120 nV RMS in 10 Hz–10 kHz band |
| DC Open-Loop Gain | 100 dB (10⁵ V/V) - ensures ≤0.1% gain error in precision 10× non-inverting amplifiers with 600 Ω load |
| Output Swing (1.8 V) | 0.024 V to 1.77 V - delivers >98% of rail-to-rail dynamic range for ADC input buffering |
| Input Common-Mode Range | −0.3 V to +1.2 V - allows direct connection of grounded thermocouples or bridge sensors without biasing resistors |
Pinout & Package
LMV301MGX is housed in a 5-pin SC70 (DCK) package measuring 2.0 mm × 2.1 mm × 1.0 mm, optimized for space-constrained portable electronics. The package features gull-wing leads, RoHS-compliant Sn lead finish, and JEDEC Level-1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | High-impedance CMOS node; requires guard ring layout to maintain <0.2 pA leakage |
| 2 | Non-Inverting Input (+) | Ground-referenced input capable of −0.3 V common-mode; critical for single-supply sensor interfaces |
| 3 | Output | Rail-to-rail sourcing/sinking; drives 600 Ω loads to within 24 mV of rails at 1.8 V |
| 4 | Ground (V−) | Reference return for single-supply operation; must be low-impedance path to minimize PSRR degradation |
| 5 | Supply (V+) | Accepts 1.8–5.0 V; supply current remains stable across full range (150–163 µA typ) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 0.182 pA typical - preserves signal integrity in picoamp-level photodiode and ion-sensor applications |
| Rail-to-rail output swing | 0.024 V to 1.77 V at 1.8 V - maximizes dynamic range for 12-bit+ SAR ADCs powered from same rail |
| Ground-sensing input range | −0.3 V to +1.2 V - eliminates need for external bias networks in grounded thermistor or strain gauge bridges |
| Low-noise, low-power trade-off | 40 nV/√Hz @ 1 kHz with only 150 µA supply - enables battery life >1 year in always-on environmental monitors |
| Capacitive load drive | Stable into 1000 pF with external compensation - supports direct driving of long PCB traces or LCD bias networks |
Applications
| Thermocouple Amplification | Photocurrent Transimpedance |
|---|---|
Use Scenario: Cold-junction compensation and microvolt-level thermocouple signal amplification in handheld temperature meters. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with ground-referenced input and sub-pA bias to prevent thermocouple wire leakage errors. Use Value: Enables ±0.5°C accuracy over −40°C to +85°C without calibration drift from input current-induced offset. |
Use Scenario: Converting nanoamp photocurrent from UV/IR photodiodes into measurable voltage for gas analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-high input impedance and low input capacitance (<5 pF). Use Value: Achieves 10⁹ V/A gain with <10 µV peak-to-peak output noise in 10 Hz bandwidth, preserving SNR in low-light conditions. |
| Sample-and-Hold Circuits | Low-Frequency Active Filters |
Use Scenario: High-fidelity sampling of slow-moving biomedical signals (e.g., ECG, EEG) in wearable health monitors. IC Role / Device Role / Timing Role: Low-leakage buffer isolating hold capacitor during acquisition phase to minimize droop. Use Value: Limits voltage droop to <1 mV over 100 ms hold time using 100 pF capacitor, due to 0.182 pA input bias. |
Use Scenario: 10 Hz high-pass and bandpass filtering in vibration sensing nodes for predictive maintenance. IC Role / Device Role / Timing Role: Unity-gain stable op amp implementing 2nd-order Sallen-Key topology with minimal component count. Use Value: Maintains filter Q-factor stability across temperature via 100 dB DC gain and 1 MHz GBW, rejecting 50/60 Hz interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-input-bias-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMP7721MA/NOPB | 3 fA input bias current (100× lower), 17 MHz GBW, 1.1 mA supply current | Better for femtoamp electrometers; unsuitable for battery-constrained designs due to 7× higher quiescent current | Select LMP7721MA/NOPB only when input leakage must be <1 fA and power budget permits >1 mA. |
| OPA316IDBVR | 0.2 pA input bias current, 10 MHz GBW, 400 µA supply current, rail-to-rail I/O | Higher speed and noise (19 nV/√Hz) - trades off low-frequency precision for wider bandwidth in active filters | Choose OPA316IDBVR when system requires >100 kHz closed-loop bandwidth and can tolerate 2.6× higher supply current. |
Compared with LMV301MGX, LMP7721MA/NOPB delivers superior leakage performance at significant power cost, while OPA316IDBVR offers higher bandwidth and noise at moderate power penalty - making LMV301MGX optimal for sub-100 kHz, battery-operated, ultra-low-leakage signal chains.
Availability
LMV301MGX is available at Aetrix Electronics and suitable for portable medical devices, battery-powered environmental sensors, and handheld test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for LMV301MGX 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 conditioning.
The LMV301MGX belongs to TI's LMV low-voltage op amp family, engineered specifically for single-supply, high-impedance sensor interface applications where input bias current, supply voltage headroom, and quiescent power are primary constraints.
FAQ
What is the maximum capacitive load the LMV301MGX can drive without oscillation?
The LMV301MGX remains stable into 1000 pF capacitive loads when externally compensated with a 50–100 Ω series resistor at the output and a 5–10 pF capacitor from output to inverting input. Without compensation, oscillation may occur above ~100 pF in unity-gain follower configuration. This behavior is confirmed in TI's SNOS968A datasheet Figure 36 and Application Hints section on capacitive load tolerance. LMV301MGX must be evaluated on target PCB layout due to trace parasitics.
Does the LMV301MGX support dual-supply operation?
Yes, the LMV301MGX operates with split supplies (e.g., ±2.5 V) as long as total supply voltage remains between 1.8 V and 5.0 V and differential input voltage stays within ±supply voltage limits. However, its input common-mode range extends only to −0.3 V below V−, so true dual-supply use requires careful biasing. The device is primarily optimized for single-supply systems, and all guaranteed specifications (e.g., output swing, CMRR) are characterized from 1.8 V to 5.0 V single-ended operation. LMV301MGX data sheet Section "Operating Ratings" confirms −40°C to +85°C junction temperature range applies under both configurations.
What is the guaranteed input offset voltage for LMV301MGX over temperature?
The LMV301MGX has a maximum input offset voltage of 9 mV over the full operating temperature range (−40°C to +85°C), as specified in the "1.8V DC Electrical Characteristics" table of the SNOS968A datasheet. At 25°C, the typical value is 0.9 mV, with a maximum of 8 mV. This parameter is tested and ensured across temperature - not just at room temperature. The offset drift is not explicitly characterized in the datasheet, but the guaranteed max ensures predictable performance in thermocouple and bridge amplifier applications where offset directly impacts measurement accuracy. LMV301MGX maintains this spec regardless of supply voltage within 1.8–5.0 V.
Can LMV301MGX be used in a unity-gain stable transimpedance configuration with >1 GΩ feedback resistor?
Yes, the LMV301MGX is unity-gain stable and supports transimpedance gains up to 10¹⁰ V/A (10 GΩ) due to its ultra-low 0.182 pA input bias current and high DC gain (100 dB). However, layout is critical: guard rings around inputs, air-wiring of pins, and minimized stray capacitance (<0.5 pF) are required to preserve bandwidth and avoid instability. TI's Application Hints (Section "Compensating Input Capacitance") provide exact formulas for feedback capacitor selection based on source impedance and desired bandwidth. LMV301MGX performance degrades if board leakage exceeds 10¹² Ω - verified in Figures 38–43 of SNOS968A.
Is LMV301MGX pin-compatible with LMV321 or other SC70-5 op amps?
No, LMV301MGX is not pin-compatible with LMV321. Although both use SC70-5 packages, LMV321 has different pin assignments: Pin 1 = Output, Pin 2 = Inverting Input, Pin 3 = Non-Inverting Input, Pin 4 = Ground, Pin 5 = Supply - whereas LMV301MGX uses Pin 1 = Inverting Input, Pin 2 = Non-Inverting Input, Pin 3 = Output, Pin 4 = Ground, Pin 5 = Supply. This reversal makes direct replacement impossible without PCB redesign. TI explicitly states "LMV301 is similar to LMV321 except the LMV301 has a CMOS input" - confirming functional similarity but not mechanical or electrical compatibility. LMV301MGX pinout is defined in Figure 1 (SC70-5 Package) of SNOS968A.
LMV301MGX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.66V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.182 pA
- Voltage - Input Offset:
- 900 µV
- Current - Supply:
- 163µA
- Current - Output / Channel:
- 108 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMV301MGX FAQ
1.How can I place an order for LMV301MGX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV301MGX 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 LMV301MGX reliable?
The price and inventory of LMV301MGX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV301MGX is usually 5 days.
3.What payment methods are accepted for LMV301MGX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV301MGX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV301MGX?
LMV301MGX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV301MGX 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 LMV301MGX?
For technical support, including LMV301MGX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV301MGX requirements.
6.How does Aetrix verify that LMV301MGX is sourced from the original manufacturer or authorized distributors?
All LMV301MGX 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 LMV301MGX meets industry standards.
7.What is the process for return or replacement of LMV301MGX?
All LMV301MGX units undergo pre-shipment inspection (PSI). If there is an issue with LMV301MGX, 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 LMV301MGX part is unused and in its original packaging.
Return procedure for LMV301MGX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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