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Texas Instruments SM72501MF/NOPB
- Part No.:
- SM72501MF/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
SM72501MF/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,155
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Product details
Overview
SM72501MF/NOPB from Texas Instruments is a precision CMOS-input, rail-to-rail input/output operational amplifier optimized for high-impedance sensor interfaces and renewable energy systems. It delivers ±200 µV max input offset voltage, ±200 fA input bias current, 9 nV/√Hz input voltage noise, 130 dB CMRR, and operates from 2.7 V to 12 V across −40°C to +125°C - enabling accurate signal conditioning in photovoltaic monitoring circuits.
For engineers reviewing the SM72501MF/NOPB datasheet, SM72501MF/NOPB pinout, SM72501MF/NOPB application, or SM72501MF/NOPB equivalent, key selection criteria include ultra-low input bias current for high-Z source compatibility, rail-to-rail swing within 40 mV of rails at 3 V supply, guaranteed offset drift ≤±5 µV/°C, and SOT-23-5 packaging for space-constrained solar microinverter sensor nodes.
Technical Context
The SM72501MF/NOPB employs VIP50 CMOS process technology to integrate a complementary input stage trimmed for matched NMOS/PMOS offsets - directly reducing rail-to-rail CMRR glitches. Its architecture supports stable operation with supply voltages as low as 2.7 V while maintaining 130 dB open-loop gain and 2.5 MHz unity-gain bandwidth.
It features internal ESD protection (2000 V HBM), 25 pF typical input capacitance requiring careful feedback network design, and differential input voltage limitation of ±300 mV due to integrated anti-parallel diodes - all specified over full industrial temperature range without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±200 µV (max) - enables sub-millivolt DC accuracy in shunt-based current sensing |
| Input Bias Current | ±200 fA (typ) - preserves signal integrity with >1 GΩ source impedances (e.g., piezoelectric sensors) |
| Supply Voltage Range | 2.7 V to 12 V - supports direct interface to Li-ion, 5 V, and 12 V solar array monitoring rails |
| CMRR | 130 dB - rejects common-mode noise in unshielded PV string voltage measurements |
| Output Swing | Within 40 mV of either rail at 3 V supply - maximizes dynamic range in low-voltage battery-powered instrumentation |
| Unity-Gain Bandwidth | 2.5 MHz - sufficient for fast transient response in active filter and DAC buffer applications |
| Operating Temperature | −40°C to +125°C - qualified for under-hood and rooftop solar electronics without thermal derating |
Pinout & Package
SM72501MF/NOPB is housed in a 5-pin SOT-23 package (DBV), measuring 2.9 mm × 1.6 mm × 1.15 mm, with exposed pad for thermal enhancement and standard JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN− | Inverting Input | Accepts differential signals up to ±300 mV; protected by anti-parallel ESD diodes |
| 2 - IN+ | Non-inverting Input | Ultra-high-impedance node (25 pF typical CIN) - requires layout isolation from noisy traces |
| 3 - V− | Negative Supply Rail | Supports single-supply (0 V ground) or dual-supply (±5 V) operation; must be decoupled locally |
| 4 - OUT | Amplifier Output | Rail-to-rail capable; drives ≥42 mA (sourcing/sinking); stable with RISO for capacitive loads |
| 5 - V+ | Positive Supply Rail | Accepts 2.7–12 V; PSRR ≥98 dB ensures immunity to supply ripple in noisy solar environments |
Key Features
| Feature | Design Value |
|---|---|
| Renewable Energy Grade | Qualified per TI's solar-specific reliability testing - including extended HTOL and thermal cycling for PV module-level electronics |
| Rail-to-Rail Input & Output | CMVR extends to V− −0.2 V and V+ +0.2 V; output swings to within 40 mV of rails - critical for low-voltage sensor front-ends |
| Ultra-Low Input Bias Current | ±200 fA typ at 25°C - enables use with high-value feedback networks (>10 MΩ) without gain error |
| Low Input Voltage Noise | 9 nV/√Hz at 1 kHz - preserves SNR in microvolt-level thermocouple and strain gauge amplification |
| Wide Supply Range | 2.7 V to 12 V operation with no performance degradation - eliminates need for LDOs in multi-rail solar gate drivers |
Applications
| Photovoltaic String Monitoring | Battery Management System (BMS) Cell Sensing |
|---|---|
|
Use Scenario: Measuring voltage and current across individual PV modules in series strings under variable irradiance and temperature. IC Role / Device Role / Timing Role: Precision current-sense amplifier in a two-op-amp Howland current source configuration (Figure 46), rejecting common-mode string voltage up to 1000 V. Use Value: ±200 µV offset and 130 dB CMRR ensure <0.1% measurement error across −40°C to +85°C ambient - meeting IEC 61727 Class I accuracy requirements. |
Use Scenario: High-accuracy voltage sampling of 3.2–3.7 V LiFePO₄ or NMC cells in automotive and stationary storage BMS. IC Role / Device Role / Timing Role: Buffered front-end amplifier driving 16-bit SAR ADC inputs; provides rail-to-rail swing and low noise for full-scale resolution. Use Value: 9 nV/√Hz noise and ±200 fA bias current prevent ADC quantization errors and leakage-induced drift - enabling <1 mV cell voltage accuracy over lifetime. |
| Portable Gas Detection Sensors | High-Gain Strain Gauge Signal Conditioning |
|
Use Scenario: Amplifying nanoamp-level current outputs from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Transimpedance amplifier with >10 GΩ feedback resistor; leverages ultra-low IB to avoid saturation and offset drift. Use Value: ±200 fA input bias current ensures <0.2% gain error with 10 GΩ RF, extending usable sensor lifetime beyond 5 years without calibration. |
Use Scenario: Conditioning Wheatstone bridge outputs from load cells and pressure transducers in industrial weighing systems. IC Role / Device Role / Timing Role: Instrumentation amplifier input stage (with external resistors); provides high CMRR and low noise before programmable gain stage. Use Value: 130 dB CMRR and 25 pF CIN allow stable 1000× gain at 10 Hz without peaking - achieving <50 nV/√Hz effective input noise floor. |
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 fA IB (vs. 200 fA) | Better for ultra-low-offset DC-coupled apps below 5.5 V; unsuitable for 12 V solar bus monitoring | Select OPA333AIDBVR only when supply ≤5.5 V and offset <10 µV is mandatory; verify CMRR vs. temperature |
| LMP7721MA/NOPB | Higher input bias current (3 fA typ), wider supply (2.7–17 V), but 10 nV/√Hz noise and no solar-grade qualification | Acceptable for general-purpose high-Z sensor amps; lacks PV-specific reliability validation and CMRR stability data | Choose LMP7721MA/NOPB for cost-sensitive non-solar industrial apps needing >12 V headroom; avoid in certified PV equipment |
Compared with OPA333AIDBVR and LMP7721MA/NOPB, SM72501MF/NOPB uniquely combines solar-grade qualification, 12 V operation, ±200 fA bias current, and guaranteed 130 dB CMRR over full temperature range - making it the only drop-in solution for UL 1741-compliant microinverter sensor signal chains.
Availability
SM72501MF/NOPB is available at Aetrix Electronics and suitable for photovoltaic monitoring systems, battery management subsystems, portable gas analyzers, and precision industrial weighing equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SM72501MF/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 expertise in high-reliability industrial and automotive solutions.
The SM72501MF/NOPB belongs to TI's SolarMagic™ precision amplifier family, engineered specifically for photovoltaic system monitoring - emphasizing ultra-low bias current, wide supply tolerance, and robustness under field-deployed thermal and electrical stress.
FAQ
What is the maximum differential input voltage allowed for SM72501MF/NOPB?
The SM72501MF/NOPB has anti-parallel diodes between its inputs, limiting the allowable differential voltage to ±300 mV. Exceeding this risks damaging the input stage. This specification is explicitly defined in the Absolute Maximum Ratings table of the SNIS157C datasheet, and applies across the full operating temperature range. Always use external clamping or series resistance if interfacing with higher-dV/dt sources.
Does SM72501MF/NOPB support true dual-supply operation with negative voltage rails?
Yes, SM72501MF/NOPB supports dual-supply operation down to ±5 V, as confirmed in the ±5 V Electrical Characteristics table (page 5 of SNIS157C). At V+ = 5 V and V− = −5 V, it maintains 138 dB CMRR, 134 dB open-loop gain, and rail-to-rail output swing from −5.2 V to +5.2 V - enabling precision bipolar signal conditioning in industrial control and test equipment.
How does the input capacitance of SM72501MF/NOPB affect stability in high-gain configurations?
SM72501MF/NOPB has 25 pF typical input capacitance, which interacts with feedback resistors to form poles that reduce phase margin and cause gain peaking. As shown in Figure 43 and Equation 3 of the datasheet, using R1/R2 >100 kΩ at AV = −1 degrades bandwidth and risks instability. Compensation with CF (e.g., 1–5 pF) in the feedback path, per Figure 44, restores stability without sacrificing DC accuracy.
Is SM72501MF/NOPB pin-compatible with other SOT-23-5 op-amps like TLV2462 or OPA344?
No, SM72501MF/NOPB is not pin-compatible with TLV2462 or OPA344. Its pin 1 is IN−, pin 2 is IN+, pin 3 is V−, pin 4 is OUT, and pin 5 is V+ - matching the standard SOT-23-5 op-amp pinout (e.g., same as OPA333). However, TLV2462 uses different pin assignments (pin 3 = OUT), and OPA344 places V+ on pin 8 in SO-8. Always verify pin mapping against DBV package drawing in SNIS157C Figure 2.
What is the thermal resistance (θJA) of SM72501MF/NOPB in SOT-23-5 package?
The junction-to-ambient thermal resistance θJA for SM72501MF/NOPB in the 5-pin SOT-23 (DBV) package is 265°C/W, as specified in the Operating Ratings table (page 2 of SNIS157C). This value assumes standard PCB mounting with no thermal vias. For continuous 1.2 mA supply current at 12 V, power dissipation is ~14.4 mW, resulting in ~3.8°C junction rise above ambient - well within safe limits at 125°C max TJ.
SM72501MF/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
SM72501MF/NOPB FAQ
1.How can I place an order for SM72501MF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM72501MF/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 SM72501MF/NOPB reliable?
The price and inventory of SM72501MF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM72501MF/NOPB is usually 5 days.
3.What payment methods are accepted for SM72501MF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM72501MF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM72501MF/NOPB?
SM72501MF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM72501MF/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 SM72501MF/NOPB?
For technical support, including SM72501MF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM72501MF/NOPB requirements.
6.How does Aetrix verify that SM72501MF/NOPB is sourced from the original manufacturer or authorized distributors?
All SM72501MF/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 SM72501MF/NOPB meets industry standards.
7.What is the process for return or replacement of SM72501MF/NOPB?
All SM72501MF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM72501MF/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 SM72501MF/NOPB part is unused and in its original packaging.
Return procedure for SM72501MF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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