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Texas Instruments LM7321QMFE/NOPB
- Part No.:
- LM7321QMFE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM7321QMFE/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:992
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Product details
Overview
LM7321QMFE/NOPB from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier engineered for high-output-current drive (±125 mA), wide supply range (2.7 V to 32 V), and unlimited capacitive load stability - deployed in automotive-grade high-side current sensing and MOSFET gate driving circuits.
For engineers reviewing the LM7321QMFE/NOPB datasheet, LM7321QMFE/NOPB pinout, LM7321QMFE/NOPB application, or LM7321QMFE/NOPB equivalent, this page delivers verified specifications including 35 V/µs slew rate, 24 MHz gain bandwidth, −113 dB THD+N, AEC-Q100 Grade 1 qualification, and SOT-23-5 package compatibility for space-constrained power interface designs.
Technical Context
The LM7321QMFE/NOPB employs a robust output stage enabling ±125 mA sourcing/sinking while maintaining rail-to-rail input common-mode voltage range (V− − 0.1 V to V+ + 0.1 V) and 90 dB CMRR across 2.7 V–32 V supplies. Its architecture eliminates oscillation with any capacitive load, validated by phase margin >20° up to 10 µF at ±15 V.
Key design enablers include low input voltage noise (12 nV/√Hz), ultra-low input current noise (1 pA/√Hz), and supply current insensitivity - varying only from 1.35 mA to 1.93 mA over full temperature (−40°C to +125°C) and supply (2.7 V–32 V) ranges - making it suitable for battery-powered and automotive electrical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 32 V - supports single-supply 3.3 V/5 V systems and dual-supply ±15 V industrial rails without redesign. |
| Output Current | ±125 mA - drives power transistors, optocouplers, or varactor diodes directly without external buffers. |
| Gain Bandwidth Product | 24 MHz - enables stable closed-loop operation up to ~1 MHz at G = 20, sufficient for precision analog front-ends. |
| Slew Rate | 35 V/µs - ensures <100 ns settling for 10 V step with minimal overshoot into 100 pF loads. |
| Capacitive Load Tolerance | Unlimited - eliminates need for isolation resistors when driving ADC inputs, LCD bias networks, or long cables. |
| Input Voltage Noise | 12 nV/√Hz at 2 kHz - preserves SNR in low-level sensor signal conditioning (e.g., photodiode biasing). |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive use. |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm), thermally enhanced for high-current operation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplifier output node; capable of ±125 mA continuous current into resistive or unlimited capacitive loads. |
| 2 - V− | Negative Supply | Ground or negative rail connection; supports single-supply (V− = 0 V) or split-supply (e.g., ±15 V) operation. |
| 3 - +IN | Non-inverting Input | High-impedance input with rail-to-rail common-mode range (V− − 0.1 V to V+ + 0.1 V); used for high-side sensing reference. |
| 4 - −IN | Inverting Input | Differential input node; enables precision current-sense amplification with matched feedback networks. |
| 5 - V+ | Positive Supply | Positive rail connection; accepts up to 32 V, enabling direct integration into wide-input power supply monitoring circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in low-voltage (2.7 V) and high-voltage (32 V) systems without headroom loss. |
| Unlimited capacitive load drive | Eliminates external compensation components when buffering ADCs, TFT panels, or long traces - reducing BOM count. |
| AEC-Q100 Grade 1 | Qualified for automotive applications with guaranteed operation from −40°C to +125°C junction temperature. |
| Low THD+N (−113 dB) | Maintains audio and precision signal fidelity in active filters and analog optocoupler drivers. |
| High PSRR (≥74 dB) | Rejects supply ripple in noisy environments (e.g., engine control units), preserving DC accuracy in sensing paths. |
Applications
| High-Side Current Sensing | Photodiode Biasing |
|---|---|
Use Scenario: Monitoring battery pack charge/discharge current in EV battery management systems using shunt resistor above ground. IC Role / Device Role / Timing Role: Precision differential amplifier with rail-to-rail input accepting common-mode voltage up to V+ + 0.1 V. Use Value: Enables accurate sub-milliohm shunt measurement without level-shifting circuitry or dedicated current-sense ICs. |
Use Scenario: Providing stable reverse bias voltage to silicon photodiodes in medical pulse oximetry sensors. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 12 nV/√Hz input voltage noise and 1 pA/√Hz current noise. Use Value: Maximizes signal-to-noise ratio for weak photocurrent signals (<100 nA), improving SpO₂ measurement resolution. |
| Driving Analog Optocouplers | MOSFET Gate Driving |
Use Scenario: Isolating microcontroller PWM outputs to motor driver ICs in industrial PLCs using linear analog optocouplers. IC Role / Device Role / Timing Role: High-output-current buffer delivering precise analog voltage to optocoupler LED anode. Use Value: Maintains linearity and bandwidth (24 MHz GBW) across temperature, ensuring accurate isolated feedback in servo loops. |
Use Scenario: Directly driving N-channel power MOSFET gates in 24 V DC-DC synchronous buck converters. IC Role / Device Role / Timing Role: High-slew-rate (35 V/µs), high-current (±125 mA) gate driver with rail-to-rail output swing. Use Value: Reduces switching transition time and conduction losses, improving converter efficiency by ≥1.2% at 500 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7321MFE/NOPB | Same die and specs, but packaged in SOIC-8 (4.90 mm × 3.90 mm); higher thermal resistance (133.5°C/W vs 185.4°C/W). | Preferred where PCB real estate allows larger footprint and higher power dissipation is needed at elevated ambient temperatures. | Select LM7321MFE/NOPB for thermal-limited designs requiring >0.7 W continuous dissipation at 25°C ambient. |
| TLV2782IDGKR | Lower output current (±25 mA), lower GBW (10 MHz), but lower supply current (0.85 mA); not AEC-Q100 qualified. | Suitable for low-power portable instrumentation, not automotive or high-current actuator interfaces. | Choose TLV2782IDGKR only for cost-sensitive, non-automotive applications where output current ≤25 mA suffices. |
Compared with LM7321MFE/NOPB and TLV2782IDGKR, LM7321QMFE/NOPB uniquely combines AEC-Q100 Grade 1 qualification, ±125 mA drive, and unlimited capacitive load tolerance in the smallest SOT-23-5 footprint - critical for space-constrained automotive modules.
Availability
LM7321QMFE/NOPB is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial motor control, medical sensor front-ends, and high-reliability embedded systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM7321QMFE/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 high-performance op amps and automotive-qualified components.
The LM7321QMFE/NOPB belongs to TI's LM732x rail-to-rail op amp family, designed specifically for demanding power interface, sensing, and actuation applications in automotive, industrial, and medical equipment where output drive strength and capacitive load immunity are critical.
FAQ
What is the maximum capacitive load the LM7321QMFE/NOPB can drive without compensation?
The LM7321QMFE/NOPB is explicitly designed to drive unlimited capacitive loads without oscillation or instability - confirmed by TI's phase margin measurements showing >20° margin even with 10 µF loads at ±15 V. This eliminates the need for series isolation resistors in ADC driver, LCD bias, or cable-driving applications, simplifying layout and reducing component count. The LM7321QMFE/NOPB achieves this via internal compensation optimized for high-current output stages.
Does the LM7321QMFE/NOPB support single-supply operation at 3.3 V?
Yes, the LM7321QMFE/NOPB fully supports single-supply operation from 2.7 V to 32 V, with all key specifications - including rail-to-rail input (V− − 0.1 V to V+ + 0.1 V), output swing within 150 mV of rails, 24 MHz GBW, and 35 V/µs slew rate - guaranteed at 3.3 V. Its supply current remains stable at 1.35 mA (typical), making it ideal for low-voltage portable and IoT sensor nodes where power efficiency and dynamic range are essential. The LM7321QMFE/NOPB maintains performance across the entire supply range without derating.
Is the LM7321QMFE/NOPB qualified for automotive applications?
Yes, the LM7321QMFE/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C), with full characterization across temperature, supply voltage, and load conditions per automotive reliability standards. It features enhanced ESD protection (±2 kV HBM), robust parametric stability over life, and traceable manufacturing - meeting requirements for engine control, battery management, and ADAS subsystems. The "Q" in LM7321QMFE/NOPB explicitly denotes automotive qualification, distinguishing it from commercial variants like LM7321MFE/NOPB.
What is the input common-mode voltage range of the LM7321QMFE/NOPB?
The LM7321QMFE/NOPB offers a true rail-to-rail input common-mode voltage range of (V− − 0.1 V) to (V+ + 0.1 V), exceeding supply rails by 100 mV on both sides. This enables high-side sensing (e.g., shunt monitoring above V+) and low-side sensing (e.g., current detection below V−) without external level-shifting circuitry. At ±15 V supplies, the usable input range extends from −15.1 V to +15.1 V - critical for precision measurement in wide-input power systems. This specification is guaranteed across −40°C to +125°C.
How does the LM7321QMFE/NOPB compare to standard rail-to-rail op amps in capacitive load driving?
Unlike most rail-to-rail op amps that require external compensation (e.g., series R + parallel C) for stability with >100 pF loads, the LM7321QMFE/NOPB uses proprietary output-stage compensation to maintain phase margin >20° up to 10 µF - verified in TI's Figure 6-1 and Figure 5-31. This allows direct connection to ADC inputs, piezoelectric actuators, or long PCB traces without added components or bandwidth sacrifice. The LM7321QMFE/NOPB sustains 35 V/µs slew rate and 24 MHz GBW even under heavy capacitive loading, a capability absent in generic rail-to-rail devices.
LM7321QMFE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 18V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.1 µA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM7321QMFE/NOPB FAQ
1.How can I place an order for LM7321QMFE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7321QMFE/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 LM7321QMFE/NOPB reliable?
The price and inventory of LM7321QMFE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7321QMFE/NOPB is usually 5 days.
3.What payment methods are accepted for LM7321QMFE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7321QMFE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM7321QMFE/NOPB?
LM7321QMFE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7321QMFE/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 LM7321QMFE/NOPB?
For technical support, including LM7321QMFE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7321QMFE/NOPB requirements.
6.How does Aetrix verify that LM7321QMFE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM7321QMFE/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 LM7321QMFE/NOPB meets industry standards.
7.What is the process for return or replacement of LM7321QMFE/NOPB?
All LM7321QMFE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM7321QMFE/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 LM7321QMFE/NOPB part is unused and in its original packaging.
Return procedure for LM7321QMFE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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