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Texas Instruments SM72501MFX/NOPB
- Part No.:
- SM72501MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SM72501MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,251
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Product details
Overview
SM72501MFX/NOPB from Texas Instruments is a renewable energy-grade, rail-to-rail input/output precision operational amplifier with CMOS input stage, ±200 µV max input offset voltage, ±200 fA input bias current, and 2.7 V to 12 V supply range. It operates across −40°C to +125°C and delivers 2.5 MHz unity-gain bandwidth for high-accuracy sensor interface and instrumentation applications in solar power electronics.
For engineers reviewing the SM72501MFX/NOPB datasheet, SM72501MFX/NOPB pinout, SM72501MFX/NOPB application, or SM72501MFX/NOPB equivalent, key selection criteria include ultra-low input bias current for high-impedance source interfacing, rail-to-rail output swing within 40 mV of rails at 3 V supply, 9 nV/√Hz input voltage noise, and guaranteed performance over extended industrial temperature range.
Technical Context
The SM72501MFX/NOPB employs VIP50 CMOS process technology to integrate a complementary rail-to-rail input stage with wide common-mode range (−0.2 V to VS + 0.2 V) and low offset drift (±1 µV/°C typical). Its architecture trims both NMOS and PMOS input pairs to minimize CMRR glitches inherent in conventional rail-to-rail amplifiers.
It achieves 130 dB open-loop gain and 130 dB CMRR at 25°C while maintaining ≥80 dB CMRR across full common-mode range. The output stage drives ±42 mA (sourcing/sinking) into 10 kΩ loads and swings to within 30–60 mV of either supply rail depending on load and supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±200 µV (max) - enables sub-millivolt DC accuracy in precision transducer signal chains without trimming. |
| Input Bias Current | ±200 fA (typ) - supports >1012 Ω source impedances without significant error voltage buildup. |
| Supply Voltage Range | 2.7 V to 12 V - operates directly from single Li-ion, dual alkaline, or photovoltaic string outputs without regulation. |
| Unity-Gain Bandwidth | 2.5 MHz - sufficient for anti-aliasing, active filtering, and fast-settling DAC buffering up to ~200 kSPS. |
| Input Voltage Noise | 9 nV/√Hz at 1 kHz - preserves SNR in low-level thermocouple, strain gauge, and photodiode front-ends. |
| Operating Temperature | −40°C to +125°C - qualified for outdoor solar inverters, battery management systems, and industrial field sensors. |
| Rail-to-Rail Output | Swings to within 30 mV of rails (10 kΩ load, 5 V supply) - maximizes dynamic range in low-voltage, single-supply systems. |
Pinout & Package
SM72501MFX/NOPB is housed in a 5-pin SOT-23 package (DBV), optimized for space-constrained PCB layouts in portable and solar energy equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN− | Inverting input | High-impedance CMOS node; differential input voltage limited to ±300 mV by internal ESD diodes. |
| 2 - IN+ | Non-inverting input | High-impedance CMOS node; input capacitance 25 pF requires careful feedback network design above 100 kHz. |
| 3 - V− | Negative supply | Supports single-supply (0 V ground) or split-supply (e.g., ±5 V) operation; must be decoupled locally. |
| 4 - OUT | Amplifier output | Capable of sourcing/sinking ≥40 mA; isolation resistor recommended for >100 pF capacitive loads. |
| 5 - V+ | Positive supply | Accepts 2.7 V–12 V; PSRR ≥98 dB ensures immunity to supply ripple in noisy PV or battery environments. |
Key Features
| Feature | Design Value |
|---|---|
| Renewable Energy Grade | Qualified per TI's solar-specific reliability standards, including extended temperature cycling and humidity testing. |
| CMOS Input Stage | Enables femtoampere-level bias current critical for high-Z pH electrodes, piezoresistive sensors, and leakage-current monitoring. |
| Rail-to-Rail Input/Output | Full input range (V− − 0.2 V to V+ + 0.2 V) and output swing (within 30 mV of rails) maximize usable signal headroom. |
| Low Input Voltage Noise | 9 nV/√Hz at 1 kHz - lower than most precision op-amps in same supply/current class, improving weak-signal fidelity. |
| VIP50 Process Integration | Combines CMOS input with 12 V common-mode capability - unavailable in standard CMOS op-amps operating above 5.5 V. |
Applications
| Solar Panel String Monitoring | Battery Management System (BMS) Cell Sensing |
|---|---|
|
Use Scenario: Measuring millivolt-level voltage differentials across shunt resistors in photovoltaic string combiners under variable irradiance and temperature. IC Role / Device Role / Timing Role: Precision current-sense amplifier in a two-op-amp Howland configuration, rejecting common-mode voltages up to ±5 V. Use Value: ±200 µV offset and ±200 fA bias current ensure <0.1% gain error at 100 mV full-scale, enabling accurate MPPT algorithm inputs. |
Use Scenario: High-impedance voltage acquisition from individual Li-ion or LFP cells in multi-cell packs, where leakage paths degrade measurement integrity. IC Role / Device Role / Timing Role: Buffered front-end amplifier driving ADC inputs; configured as unity-gain follower with guard ring layout. Use Value: 25 pF input capacitance and rail-to-rail output allow direct connection to SAR ADCs with minimal settling time penalty at 16-bit resolution. |
| Portable Gas Sensor Signal Conditioning | Industrial Strain Gauge Bridge Amplifier |
|
Use Scenario: Amplifying nanoampere-level current outputs from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Transimpedance amplifier with TIA feedback resistor >100 MΩ, operating from 3 V supply. Use Value: Ultra-low input bias current prevents baseline shift and enables stable 24-hour zero calibration; 715 µA supply current extends battery life. |
Use Scenario: Low-noise amplification of microvolt-level Wheatstone bridge outputs in load cells and pressure transducers. IC Role / Device Role / Timing Role: Instrumentation-grade gain stage with matched external resistors; driven by low-noise reference. Use Value: 9 nV/√Hz input noise and 130 dB CMRR suppress thermal EMF and EMI pickup, achieving <1 µVpp integrated noise in 10 Hz–10 kHz band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Lower max offset (10 µV), but only 5.5 V max supply and −40°C to +125°C rating not fully characterized; 360 µA supply current. | Better DC accuracy in low-voltage (<5.5 V) systems; unsuitable for direct 12 V PV string monitoring. | Select OPA333AIDBVR when supply is ≤5.5 V and ultra-low offset dominates over supply flexibility. |
| AD8628ARJZ-REEL7 | Zero-drift architecture; 1 µV max offset, but 5.5 V max supply, higher 1.2 mA supply current, and no guaranteed 125°C operation. | Superior long-term DC stability for lab instruments; lacks extended supply range and automotive-grade temp validation. | Choose AD8628ARJZ-REEL7 for metrology-grade DC stability where supply is regulated and temperature stays ≤85°C. |
Compared with OPA333AIDBVR and AD8628ARJZ-REEL7, SM72501MFX/NOPB uniquely combines 12 V operation, 125°C qualification, and femtoampere bias current-making it irreplaceable in unregulated solar and harsh-environment sensing where other precision amps fail electrically or thermally.
Availability
SM72501MFX/NOPB is available at Aetrix Electronics and suitable for solar panel monitoring, battery cell voltage sensing, portable gas detection, industrial strain gauge interfaces, and precision DAC buffering requiring stable component supply across extended temperature and supply ranges.
Supply support for SM72501MFX/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, embedded processing, and power management ICs, with decades of heritage in high-reliability industrial and automotive solutions.
The SM72501MFX/NOPB belongs to TI's Renewable Energy Grade precision amplifier family, engineered specifically for high-accuracy, low-power signal conditioning in photovoltaic systems, battery monitoring, and energy-harvesting applications.
FAQ
What is the maximum supply voltage rating for SM72501MFX/NOPB?
The absolute maximum supply voltage (V+ to V−) for SM72501MFX/NOPB is 13.2 V. The recommended operating range is 2.7 V to 12 V, and all electrical specifications-including offset voltage, CMRR, and output swing-are guaranteed across this full range at temperatures from −40°C to +125°C. Exceeding 13.2 V risks permanent damage.
Does SM72501MFX/NOPB support true rail-to-rail input common-mode range?
Yes. SM72501MFX/NOPB supports a common-mode input voltage range from (V− − 0.2 V) to (V+ + 0.2 V), verified across its full operating temperature and supply range. At 5 V supply, this spans −0.2 V to +5.2 V; at ±5 V supplies, it covers −5.2 V to +5.2 V-enabling direct interfacing with grounded or bipolar sensor outputs without level-shifting.
What is the input capacitance of SM72501MFX/NOPB and how does it affect stability?
SM72501MFX/NOPB has a typical input capacitance of 25 pF per input terminal, resulting from its high-impedance CMOS input stage. This capacitance interacts with feedback/gain resistors to form poles that reduce phase margin above ~100 kHz. Stability is maintained by using lower-value resistors (≤10 kΩ) or adding a feedback capacitor (CF) per TI's Application Note SNIS157C Figure 44.
Can SM72501MFX/NOPB drive capacitive loads directly?
SM72501MFX/NOPB is not unity-gain stable into heavy capacitive loads. For loads >100 pF, TI recommends inserting an isolation resistor (RISO) between the output and the load capacitance, as shown in Figure 41 of the datasheet. Typical RISO values range from 10 Ω to 100 Ω depending on CL; larger RISO improves stability but reduces output swing and current drive capability.
Is SM72501MFX/NOPB pin-compatible with other SOT-23 op-amps?
No documented pin-compatible alternatives exist for SM72501MFX/NOPB in the 5-pin SOT-23 package. Its pinout (IN−, IN+, V−, OUT, V+) differs from industry-standard configurations like the LMV321 or OPA344. Layout redesign is required when substituting; always verify pin mapping against the DBV package drawing in the SM72501MFX/NOPB datasheet before PCB revision.
SM72501MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SolarMagic™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.1V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 37 µV
- Current - Supply:
- 790µA
- Current - Output / Channel:
- 86 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
SM72501MFX/NOPB FAQ
1.How can I place an order for SM72501MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72501MFX/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 SM72501MFX/NOPB reliable?
The price and inventory of SM72501MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM72501MFX/NOPB is usually 5 days.
3.What payment methods are accepted for SM72501MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72501MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72501MFX/NOPB?
SM72501MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72501MFX/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 SM72501MFX/NOPB?
For technical support, including SM72501MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72501MFX/NOPB requirements.
6.How does Aetrix verify that SM72501MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72501MFX/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 SM72501MFX/NOPB meets industry standards.
7.What is the process for return or replacement of SM72501MFX/NOPB?
All SM72501MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72501MFX/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 SM72501MFX/NOPB part is unused and in its original packaging.
Return procedure for SM72501MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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