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Texas Instruments LM7321MF/NOPB
- Part No.:
- LM7321MF/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM7321MF/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,706
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Product details
Overview
LM7321MF/NOPB from Texas Instruments is a single-channel rail-to-rail input and output operational amplifier optimized for high-output current (±125 mA), wide supply range (2.7 V to 32 V), and unlimited capacitive load drive capability. It delivers 24 MHz gain bandwidth, 35 V/µs slew rate, and −113 dB THD+N at 1 kHz - enabling precision analog signal conditioning in automotive powertrain sensors and high-side current sensing circuits.
For engineers reviewing the LM7321MF/NOPB datasheet, LM7321MF/NOPB pinout, LM7321MF/NOPB application, or LM7321MF/NOPB equivalent, this page provides verified specifications, SOT-23-5 pin mapping, AEC-Q100 Grade 1 qualification status, and real-world implementation guidance for capacitive-load-tolerant buffer and driver designs.
Technical Context
The LM7321MF/NOPB employs a robust output stage capable of sourcing/sinking ±125 mA while maintaining stability into any capacitive load - a key differentiator from standard op amps requiring external isolation resistors. Its input common-mode voltage extends 0.1 V beyond both rails, supporting true high-side and low-side sensing across its full 2.7–32 V supply range.
Device parameters-including CMRR (≥109 dB at 32 V), PSRR (≥78 dB), and input voltage noise (11.9 nV/√Hz)-are specified over −40°C to +125°C and remain stable across supply voltages, making it suitable for automotive electrical systems where battery voltage fluctuates between 6 V and 16 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 32 V - supports single-supply (3 V MCU interfaces) and dual-supply (±15 V industrial control) operation without redesign. |
| Output Current | ±125 mA - drives MOSFET gates, optocouplers, and varactor diodes directly without external buffers. |
| Gain Bandwidth Product | 24 MHz - enables stable closed-loop gain ≥10 at 2 MHz for anti-aliasing filter amplification. |
| Slew Rate | 35 V/µs - ensures <100 ns settling for 10 V step signals, critical in fast feedback loops and pulse amplification. |
| Capacitive Load Tolerance | Unlimited - eliminates need for series isolation resistors when driving ADC input caps (>1 nF) or LCD column drivers. |
| Input Common-Mode Range | (V−) − 0.1 V to (V+) + 0.1 V - enables direct connection to shunt resistors placed above or below ground in current-sense applications. |
| THD+N | −113 dB at 1 kHz - preserves signal fidelity in audio-grade sensor front-ends and precision DAC output buffers. |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm), thermally enhanced for high-current operation in space-constrained automotive and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplified signal source; capable of ±125 mA continuous drive into any capacitive or resistive load. |
| 2 - V− | Negative Supply | Reference for dual-supply operation; accepts ground or negative rail down to −16 V (VS ≤ 32 V). |
| 3 - +IN | Non-inverting Input | High-impedance node (IB = 0.4 µA max); supports rail-to-rail common-mode input including below-V− and above-V+. |
| 4 - −IN | Inverting Input | Differential input node; used with feedback network to set closed-loop gain and bandwidth. |
| 5 - V+ | Positive Supply | Power rail up to +16 V (with V− = −16 V) or +32 V (single-supply); supplies internal bias and output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in low-voltage (2.7 V) systems and accurate signal capture near supply rails. |
| AEC-Q100 Grade 1 | Qualified for automotive applications from −40°C to +125°C ambient, with validated reliability under thermal cycling and vibration stress. |
| Unlimited capacitive load drive | Eliminates external compensation components when interfacing with ADC input capacitance, piezo actuators, or display drivers. |
| High slew rate + GBW | 35 V/µs slew rate with 24 MHz GBW allows simultaneous high-speed and high-accuracy signal amplification (e.g., motor phase current sensing). |
| Low distortion | −113 dB THD+N ensures minimal harmonic corruption in precision analog signal chains, such as photodiode transimpedance amplifiers. |
Applications
| Driving MOSFETs and Power Transistors | Capacitive Proximity Sensors |
|---|---|
Use Scenario: Gate driving for N-channel MOSFETs in 12 V automotive power distribution modules. IC Role / Device Role / Timing Role: High-current buffer amplifying PWM signals from microcontroller GPIOs to rapidly charge/discharge gate capacitance. Use Value: ±125 mA output current reduces gate drive time to <100 ns, minimizing conduction losses and improving system efficiency. |
Use Scenario: Signal conditioning for self-capacitance touch panels in infotainment displays. IC Role / Device Role / Timing Role: Transimpedance amplifier converting femtoamp-level displacement current into measurable voltage swing. Use Value: Unlimited capacitive load tolerance allows direct connection to >500 pF electrode traces without peaking or oscillation. |
| High-Side Sensing | Photodiode Biasing |
Use Scenario: Current measurement in 48 V mild-hybrid vehicle battery management systems using shunt resistors on the high side of the load. IC Role / Device Role / Timing Role: Difference amplifier with rail-to-rail input capturing voltage drop across shunt while referenced to battery positive. Use Value: Input common-mode range extending 0.1 V beyond V+ enables accurate sensing at 48 V bus without level-shifting circuitry. |
Use Scenario: Reverse-biasing and amplifying photocurrent from large-area silicon photodiodes in ambient light sensors. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 12 nV/√Hz input voltage noise and 0.5 pA/√Hz current noise. Use Value: 11.9 nV/√Hz voltage noise preserves SNR in low-light conditions where photocurrents are sub-nanoamp. |
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 |
|---|---|---|---|
| TLV2782IDGKR | Lower output current (±40 mA), lower GBW (10 MHz), but lower quiescent current (0.55 mA/channel). | Not suitable for direct MOSFET gate drive or high-current capacitive loads; better for ultra-low-power sensor nodes. | Select TLV2782IDGKR only when supply current <1 mA is mandatory and output load ≤10 mA. |
| OPA2350UA/2K5 | Higher precision (VOS = 50 µV max), lower noise (7 nV/√Hz), but limited output current (±30 mA) and no AEC-Q100 qualification. | Preferred for precision instrumentation; unsuitable for automotive under-hood environments or high-current drive. | Choose OPA2350UA/2K5 for lab-grade measurement front-ends where accuracy outweighs ruggedness and drive strength. |
Compared with TLV2782IDGKR and OPA2350UA/2K5, LM7321MF/NOPB uniquely combines automotive qualification, ±125 mA drive, and unlimited capacitive load tolerance - making it the only option among the three for demanding high-side sensing and power device interface applications.
Availability
LM7321MF/NOPB is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive feedback, and high-reliability sensor interface applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM7321MF/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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM7321MF/NOPB belongs to TI's high-output-current rail-to-rail op amp product line, designed specifically for driving power devices, capacitive sensors, and high-side current sense circuits in harsh automotive and industrial environments.
FAQ
What is the maximum capacitive load the LM7321MF/NOPB can drive without external compensation?
The LM7321MF/NOPB is explicitly designed for unlimited capacitive load drive - meaning it remains stable with any value of capacitive load (e.g., 10 nF, 100 nF, or >1 µF) without requiring series isolation resistors or external compensation networks. This is confirmed in TI's datasheet Figure 5-31 and Section 6.4.1, where phase margin remains >20° even at 10 µF load with RL = 600 Ω.
Does the LM7321MF/NOPB support true rail-to-rail input common-mode voltage?
Yes - the LM7321MF/NOPB features an input common-mode voltage range from (V−) − 0.1 V to (V+) + 0.1 V, exceeding rail-to-rail by 100 mV on both sides. This is verified in Section 5.5 Electrical Characteristics (VCM parameter) and enables direct high-side sensing in 48 V systems without level shifters or resistor dividers.
Is the LM7321MF/NOPB qualified for automotive applications?
Yes - the LM7321MF/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with full characterization across temperature, voltage, and lifetime stress tests per automotive reliability standards. This qualification is explicitly stated in the "Features" section of the official TI datasheet (SNOSAW8F).
What is the typical supply current of the LM7321MF/NOPB at 25°C?
The LM7321MF/NOPB draws 1.35 mA typical supply current per channel at TA = 25°C, as specified in Section 5.5 Electrical Characteristics (IS parameter). Over temperature (−40°C to +125°C), supply current remains tightly bounded at 1.35–2.23 mA, ensuring predictable power budgeting in thermally varying environments.
Can the LM7321MF/NOPB be used in single-supply configurations?
Yes - the LM7321MF/NOPB operates from a single supply as low as 2.7 V, with rail-to-rail input and output swing. Its input common-mode range extends below ground (V− − 0.1 V), allowing use with ground-referenced inputs and output swing within 50 mV of either rail - ideal for 3.3 V microcontroller-based sensor interfaces.
LM7321MF/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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM7321MF/NOPB FAQ
1.How can I place an order for LM7321MF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7321MF/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 LM7321MF/NOPB reliable?
The price and inventory of LM7321MF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7321MF/NOPB is usually 5 days.
3.What payment methods are accepted for LM7321MF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7321MF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM7321MF/NOPB?
LM7321MF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7321MF/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 LM7321MF/NOPB?
For technical support, including LM7321MF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7321MF/NOPB requirements.
6.How does Aetrix verify that LM7321MF/NOPB is sourced from the original manufacturer or authorized distributors?
All LM7321MF/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 LM7321MF/NOPB meets industry standards.
7.What is the process for return or replacement of LM7321MF/NOPB?
All LM7321MF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM7321MF/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 LM7321MF/NOPB part is unused and in its original packaging.
Return procedure for LM7321MF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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