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Texas Instruments LM7321MFE/NOPB
- Part No.:
- LM7321MFE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM7321MFE/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:17,033
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Product details
Overview
LM7321MFE/NOPB from Texas Instruments is a single-channel rail-to-rail input/output operational amplifier optimized for high-output-current, wide-supply, and capacitive-load-tolerant applications. It delivers ±125mA output current, 24MHz gain bandwidth, 35V/µs slew rate, and operates from 2.7V to 32V (±1.35V to ±16V), enabling use in automotive power supply monitoring and high-side current sensing circuits.
For engineers reviewing the LM7321MFE/NOPB datasheet, LM7321MFE/NOPB pinout, LM7321MFE/NOPB application, or LM7321MFE/NOPB equivalent, key selection criteria include unlimited capacitive load drive capability, −40°C to +125°C AEC-Q100 Grade 1 qualification, rail-to-rail I/O swing within 150mV of rails at 2kΩ load, and low 12nV/√Hz input voltage noise for precision signal conditioning.
Technical Context
The LM7321MFE/NOPB employs a robust output stage capable of sourcing/sinking ±125mA while maintaining stability into unlimited capacitive loads - a critical feature for driving MOSFET gates, analog optocouplers, and varactor diodes in PLLs. Its input stage extends 0.1V beyond both supply rails, supporting true high-side and below-ground sensing without external level-shifting.
Performance remains stable across supply voltages (2.7V–32V) and temperature (−40°C to +125°C), with CMRR ≥109dB and PSRR ≥78dB over full operating range. Input bias current stays below 0.4µA and THD+N reaches −113dB at 1kHz, confirming suitability for low-distortion, wide-dynamic-range analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 32V (±1.35V to ±16V): supports single- and dual-supply industrial, automotive, and international power systems. |
| Output Current | ±125mA: drives heavy loads like MOSFETs, power transistors, and capacitive sensor interfaces without external buffers. |
| Gain Bandwidth Product | 24MHz: enables stable closed-loop operation up to ~1MHz at G = 24, suitable for active filters and fast-settling ADC drivers. |
| Slew Rate | 35V/µs: ensures <100ns 10V step response, critical for pulse amplification and wideband signal conditioning. |
| Input Voltage Noise | 12nV/√Hz at 2kHz: preserves SNR in precision instrumentation and photodiode biasing applications. |
| Capacitive Load Tolerance | Unlimited: eliminates need for isolation resistors when driving LCD column drivers, ADC inputs, or long cables. |
| Operating Temperature | −40°C to +125°C: qualified per AEC-Q100 Grade 1 for under-hood automotive electronics and industrial control environments. |
Pinout & Package
LM7321MFE/NOPB is packaged in a 5-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for space-constrained PCB layouts while maintaining thermal performance via exposed pad (not electrically connected).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Amplified signal output node; capable of ±125mA drive into any capacitive or resistive load. |
| 2 (V−) | Negative Supply | Connects to ground or negative rail; supports single-supply (V− = GND) and dual-supply (V− = −VS) configurations. |
| 3 (+IN) | Non-inverting Input | High-impedance input extending 0.1V beyond V− and V+; enables direct sensing at supply rails. |
| 4 (−IN) | Inverting Input | Differential input node; used in standard op-amp configurations including transimpedance and difference amplifiers. |
| 5 (V+) | Positive Supply | Connects to positive rail; supplies internal circuitry and enables rail-to-rail output swing up to 150mV from V+. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.1V beyond both supply rails, enabling high-side and below-ground current sensing without external level shifters. |
| Unlimited capacitive load drive | Stable operation into any capacitance value - eliminates series isolation resistors in TFT buffer, ADC driver, and sensor interface designs. |
| High-output current (±125mA) | Directly drives power devices (MOSFETs, IGBTs), optocouplers, and varactor diodes without external transistor stages. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from −40°C to +125°C ambient, with robust ESD tolerance (±2000V HBM). |
| Low distortion (THD+N = −113dB) | Preserves signal fidelity in audio, measurement, and communication signal chains where harmonic content must be minimized. |
Applications
| Automotive Power Monitoring | Capacitive Proximity Sensing |
|---|---|
Use Scenario: Real-time monitoring of 12V/24V battery voltage and alternator output in engine control units. IC Role / Device Role / Timing Role: Precision buffer and level-shifter for ADC input, handling rail-to-rail common-mode swings during cranking transients. Use Value: Maintains accuracy across −40°C to +125°C and rejects supply ripple with 78dB PSRR, ensuring reliable diagnostics under harsh conditions. |
Use Scenario: Driving and conditioning signals from self-capacitance touch panels or proximity sensors in automotive door handles. IC Role / Device Role / Timing Role: High-speed, low-noise transimpedance amplifier converting pF-level capacitance changes into measurable voltage. Use Value: Unlimited capacitive load tolerance eliminates tuning resistors; 35V/µs slew rate supports fast response to finger proximity events. |
| Photodiode Biasing | High-Side Current Sensing |
Use Scenario: Reverse-biasing photodiodes in optical smoke detectors and industrial light curtains. IC Role / Device Role / Timing Role: Low-noise, low-input-bias-current voltage source providing stable bias while amplifying photocurrent. Use Value: 12nV/√Hz input voltage noise and 0.4µA max input bias current maximize dynamic range and minimize dark-current error. |
Use Scenario: Measuring load current in 24V industrial motor controllers using shunt resistors placed between load and V+. IC Role / Device Role / Timing Role: Difference amplifier with rail-to-rail input accepting common-mode voltage up to V+ + 0.1V. Use Value: Enables direct high-side sensing without level-shifting ICs; 109dB CMRR rejects supply noise in noisy motor-drive environments. |
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 |
|---|---|---|---|
| LM7321MA/NOPB | Same silicon die and electrical specs; differs only in SOIC-8 packaging (vs. SOT-23-5 of LM7321MFE/NOPB). | SOIC-8 offers higher thermal mass and easier prototyping; SOT-23-5 saves board area in compact modules. | Select LM7321MA/NOPB for manual assembly or thermal-demanding applications; LM7321MFE/NOPB for space-constrained, automated production. |
| TLV2782IDGKR | Lower output current (±25mA), lower GBW (10MHz), but lower quiescent current (0.55mA/channel); not AEC-Q100 qualified. | Suitable for battery-powered portable instruments, not automotive or high-current industrial loads. | Choose TLV2782IDGKR only for ultra-low-power, non-automotive applications where ±125mA drive is unnecessary. |
Compared with LM7321MA/NOPB, LM7321MFE/NOPB provides identical performance in a smaller footprint ideal for dense layouts, while TLV2782IDGKR trades drive strength and qualification for power savings - making LM7321MFE/NOPB the sole choice for AEC-Q100-compliant, high-current rail-to-rail amplification.
Availability
LM7321MFE/NOPB is available at Aetrix Electronics and suitable for automotive power monitoring, capacitive proximity sensing, and high-side current sensing requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for LM7321MFE/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, with decades of expertise in precision amplifiers and automotive-grade components.
LM7321MFE/NOPB belongs to TI's LM732x rail-to-rail I/O op-amp family, engineered specifically for high-output-current, wide-supply, and unlimited-capacitive-load applications in automotive, industrial, and test equipment.
FAQ
What is the maximum capacitive load the LM7321MFE/NOPB can drive without compensation?
The LM7321MFE/NOPB is explicitly designed to drive unlimited capacitive loads without oscillation or required external compensation. This capability is verified across all operating conditions (−40°C to +125°C, 2.7V–32V) and confirmed in Figure 5-31 and Section 6.4.1 of the official datasheet. No series isolation resistor is needed, though one may improve settling time in specific high-precision applications.
Does the LM7321MFE/NOPB support single-supply operation?
Yes, the LM7321MFE/NOPB fully supports single-supply operation from 2.7V to 32V. Its rail-to-rail input extends 0.1V beyond both rails, and its output swings within 150mV of each rail under 2kΩ load - enabling accurate signal conditioning even with ground-referenced inputs and outputs. This is validated in Table 5.5 (VOUT specifications) and Section 6.1.
Is the LM7321MFE/NOPB qualified for automotive applications?
Yes, the LM7321MFE/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 Section 1 (Features) and Section 5.3 (Recommended Operating Conditions) of the datasheet.
What is the typical input offset voltage drift over temperature for LM7321MFE/NOPB?
The LM7321MFE/NOPB has a typical input offset voltage drift of ±2.5µV/°C, as specified in Section 5.5 (Electrical Characteristics) under "TC VOS". This low drift ensures stable DC accuracy in temperature-varying environments such as engine compartments or industrial enclosures without frequent recalibration.
Can the LM7321MFE/NOPB drive a 600Ω load at ±15V supply while maintaining linearity?
Yes - at ±15V supply, the LM7321MFE/NOPB delivers ±125mA output current and maintains THD+N of −113dB at 1kHz into 100kΩ (Section 5.5). While THD degrades slightly into lower impedances, Figure 5-53 confirms −90dB THD+N at 1kHz into 600Ω, confirming usable linearity for power-stage interfacing and audio buffering applications.
LM7321MFE/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
LM7321MFE/NOPB FAQ
1.How can I place an order for LM7321MFE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7321MFE/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 LM7321MFE/NOPB reliable?
The price and inventory of LM7321MFE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7321MFE/NOPB is usually 5 days.
3.What payment methods are accepted for LM7321MFE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7321MFE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM7321MFE/NOPB?
LM7321MFE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7321MFE/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 LM7321MFE/NOPB?
For technical support, including LM7321MFE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7321MFE/NOPB requirements.
6.How does Aetrix verify that LM7321MFE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM7321MFE/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 LM7321MFE/NOPB meets industry standards.
7.What is the process for return or replacement of LM7321MFE/NOPB?
All LM7321MFE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM7321MFE/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 LM7321MFE/NOPB part is unused and in its original packaging.
Return procedure for LM7321MFE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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