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Texas Instruments LM324ANSR
- Part No.:
- LM324ANSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM324ANSR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:14,701
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Product details
Overview
LM324ANSR from Texas Instruments is a quad operational amplifier in SOIC-14 package, designed for cost-sensitive industrial and consumer applications. It delivers rail-to-rail input (common-mode down to V–), 36V supply range, ±3mV max input offset voltage at 25°C, 1.2MHz gain-bandwidth product, and 240µA per amplifier quiescent current - enabling precision signal conditioning in single-supply systems like power supply monitoring and sensor interfaces.
For engineers reviewing the LM324ANSR datasheet, LM324ANSR pinout, LM324ANSR application, or LM324ANSR equivalent, this page provides verified electrical specifications, validated SOIC-14 pin functions, real-world use cases in AC inverters and multi-function printers, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM324ANSR implements four independent high-voltage op amps in a single monolithic IC, each featuring unity-gain stability, integrated EMI/RF filtering, and input stage capable of differential voltage swing up to the full supply rails. Its input common-mode range extends to the negative rail (V–), supporting true single-supply operation without level-shifting circuitry.
Internally, it uses bipolar input transistors with matched NPN pairs for low offset drift (±7µV/°C) and robust performance across –40°C to +85°C ambient temperature. The output stage supports ±20mA sourcing/sinking capability and drives capacitive loads up to 100pF while maintaining stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 36V - enables direct integration into 5V, 12V, 24V, and 32V industrial power rails without regulation. |
| Input Offset Voltage (max) | ±3mV at 25°C - ensures ≤3mV DC error in precision DC-coupled amplifiers (e.g., current-sense feedback loops). |
| Gain-Bandwidth Product | 1.2MHz - supports stable closed-loop gain ≥10 at 100kHz or unity-gain operation up to 1.2MHz. |
| Quiescent Current (per amp) | 240µA typical - allows four-channel amplification in battery-backed or energy-constrained systems with <1mA total IQ. |
| Output Swing (from rail) | 1.5V from positive rail, 100mV from negative rail (IOUT = 50µA) - delivers usable dynamic range near ground in single-supply configurations. |
| Common-Mode Input Range | Includes V– (ground) - eliminates need for biasing resistors when interfacing with 0V-referenced sensors or DAC outputs. |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 for handling robustness in manufacturing and field service environments. |
Pinout & Package
LM324ANSR is housed in a 14-pin SOIC (D package), measuring 8.65mm × 6mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance RθJA = 99.3°C/W enables operation at up to +85°C ambient with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN– (Pin 2) | Inverting input of Amp 1 | Accepts feedback or inverted signal path; referenced to same common-mode as all inputs. |
| 1IN+ (Pin 3) | Non-inverting input of Amp 1 | Accepts reference, sensor, or buffered signal; supports rail-to-rail common-mode range. |
| 1OUT (Pin 1) | Output of Amp 1 | Drives loads up to ±20mA; output swing limited to 1.5V below VCC+ and 100mV above VCC–. |
| VCC+ (Pin 4) | Positive supply rail | Connects to highest system voltage (up to 36V); powers all four amplifiers. |
| 2IN+ (Pin 5) | Non-inverting input of Amp 2 | Independent channel input; electrically isolated from other amps except shared supply rails. |
| 2IN– (Pin 6) | Inverting input of Amp 2 | Used for differential configuration or feedback network; matches Pin 2 electrical behavior. |
| 2OUT (Pin 7) | Output of Amp 2 | Same drive strength and swing limits as Pin 1; no crosstalk beyond specified 120dB channel separation. |
| VCC– (Pin 11) | Negative supply or ground | Reference node for all amplifiers; supports single-supply operation when tied to system GND. |
| 3IN– (Pin 9) | Inverting input of Amp 3 | Matches Pin 2 function; validated for operation across full –40°C to +85°C temperature range. |
| 3IN+ (Pin 10) | Non-inverting input of Amp 3 | Supports input voltages down to VCC– (ground), critical for 0V-based sensor interfacing. |
| 3OUT (Pin 8) | Output of Amp 3 | Capable of driving 100pF capacitive loads directly without external compensation. |
| 4IN– (Pin 13) | Inverting input of Amp 4 | Electrically identical to Pins 2/6/9; validated for ESD immunity per 2kV HBM spec. |
| 4IN+ (Pin 12) | Non-inverting input of Amp 4 | Enables rail-to-rail input operation up to VCC+ – 1.5V at 25°C (VCC+ – 2V over full temp range). |
| 4OUT (Pin 14) | Output of Amp 4 | Delivers 0.5V/µs slew rate and settles to 0.1% in 4µs for 2V step - suitable for moderate-speed control loops. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends to VCC– (ground), eliminating input bias networks in single-supply sensor front-ends. |
| Integrated EMI/RF filter | Reduces susceptibility to 30MHz–1GHz noise in motor-drive and switching-power environments. |
| Low quiescent current (240µA/amp) | Enables always-on monitoring circuits in battery-powered HVAC controllers with <1mA total draw. |
| High ESD rating (2kV HBM) | Permits direct PCB handling and assembly without special ESD protocols in Class 0 environments. |
| Unity-gain stable architecture | Operates reliably with no external compensation in buffer, comparator, or integrator configurations. |
Applications
| Power Supply Monitoring | Multi-Function Printer Engine Control |
|---|---|
Use Scenario: Real-time voltage supervision of 12V/24V DC rails in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: Quad op amp configured as four independent comparators with hysteresis, detecting overvoltage, undervoltage, and brownout conditions. Use Value: Leverages rail-to-rail input to sense down to 0V and 36V tolerance to monitor unregulated auxiliary supplies without attenuation. | Use Scenario: Closed-loop control of paper feed rollers, fuser temperature, and toner density in office MFPs. IC Role / Device Role / Timing Role: Signal conditioning for thermistor, photodiode, and current-sense feedback paths feeding MCU ADC inputs. Use Value: 240µA/amp IQ enables continuous sensing during sleep mode; ±3mV offset ensures <1% measurement error in 100°C fuser control. |
| AC Inverter Motor Control | Home Appliance Sensor Interface |
Use Scenario: Analog front-end for current/voltage sensing in 1–5kW residential solar inverters and variable-frequency drives. IC Role / Device Role / Timing Role: Four-channel amplifier buffering shunt resistor signals, isolating analog paths before isolation amplifiers or ADCs. Use Value: 1.2MHz GBW supports accurate reconstruction of 50kHz PWM-modulated currents; EMI filtering rejects switching noise from IGBT gate drivers. | Use Scenario: Front-end signal conditioning for door position, drum rotation, and water-level sensors in washing machines and refrigerators. IC Role / Device Role / Timing Role: Low-drift amplifier for resistive and capacitive sensor outputs, providing stable DC gain prior to microcontroller sampling. Use Value: ±7µV/°C offset drift maintains calibration across –25°C to +70°C cabinet temperatures; SOIC-14 package fits compact appliance PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Same SOIC-14 package, identical pinout, but rated for 0°C to 70°C only (vs. –40°C to +85°C for LM324ANSR); offset voltage max ±7mV. | Limited to commercial-grade indoor equipment; unsuitable for automotive or outdoor-rated inverters. | Select LM324DR only for cost-sensitive, non-industrial applications where ambient stays within 0–70°C and ±7mV offset is acceptable. |
| LM2902DT | TSSOP-14 package (5mm × 6.4mm), same –40°C to +125°C rating, but higher max offset (±7mV) and lower PSRR (50dB min vs. 65dB min). | Smaller footprint benefits space-constrained designs, but reduced PSRR requires cleaner supply filtering in noisy motor-control boards. | Choose LM2902DT when board area is critical and extended temperature range is required, accepting trade-offs in offset and supply rejection. |
Compared with LM324DR and LM2902DT, the LM324ANSR offers superior temperature range coverage (–40°C to +85°C), tighter offset (±3mV), and higher PSRR (65dB min), making it optimal for industrial power electronics where long-term DC accuracy and thermal resilience are mandatory.
Availability
LM324ANSR is available at Aetrix Electronics and suitable for power supply monitoring, multi-function printer engine control, and AC inverter motor control requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for LM324ANSR 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 LM324x family was engineered for cost-sensitive, high-reliability analog signal conditioning in industrial power systems, consumer appliances, and infrastructure equipment - prioritizing wide supply range, rail-to-rail input, and robust ESD/EMI performance.
FAQ
What is the operating temperature range of the LM324ANSR?
The LM324ANSR is specified for operation from –40°C to +85°C ambient temperature. This extended industrial temperature range enables reliable deployment in HVAC systems, outdoor power inverters, and factory automation equipment where ambient conditions exceed commercial-grade limits. All key parameters - including input offset voltage, quiescent current, and output drive - are guaranteed across this full range per TI's SLOS066AE datasheet.
Does the LM324ANSR support single-supply operation?
Yes, the LM324ANSR fully supports single-supply operation due to its rail-to-rail input common-mode range that includes the negative supply rail (VCC–). When VCC– is tied to ground, inputs can accept signals from 0V up to VCC+ – 1.5V (at 25°C) or VCC+ – 2V (over full temperature range), eliminating the need for external biasing networks in sensor interface and level-shifting applications.
What is the maximum capacitive load the LM324ANSR can drive without oscillation?
The LM324ANSR is characterized to drive up to 100pF capacitive loads while maintaining stability and specified phase margin (56°). This capability allows direct connection to ADC input capacitors, long PCB traces, or small bypass caps without external series resistance or isolation. For loads exceeding 100pF, TI recommends adding a 10Ω–100Ω series resistor between the output and the capacitor to preserve loop stability.
How does the LM324ANSR differ from the legacy LM324N?
The LM324ANSR is a next-generation variant of the LM324 family, offering improved specifications over the legacy LM324N: tighter input offset voltage (±3mV max vs. ±7mV), enhanced ESD protection (2kV HBM vs. 500V HBM), integrated EMI/RF filtering, and guaranteed operation across –40°C to +85°C. It is a drop-in replacement for LM324N in SOIC-14 footprints but delivers measurable performance gains in noise-prone and thermally demanding applications.
Is the LM324ANSR pin-compatible with other LM324 variants in SOIC-14 packages?
Yes, the LM324ANSR shares identical pinout and SOIC-14 (D package) mechanical dimensions with LM324DR, LM324N, LM324ADT, and LM2902DT (SOIC-14 versions). All share the same 14-pin topology: four independent op amps with dedicated inputs/outputs, dual supply pins (VCC+, VCC–), and no NC pins. This enables direct substitution in existing designs without PCB layout changes.
LM324ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.4mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LM324ANSR FAQ
1.How can I place an order for LM324ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324ANSR 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 LM324ANSR reliable?
The price and inventory of LM324ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324ANSR is usually 5 days.
3.What payment methods are accepted for LM324ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324ANSR?
LM324ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324ANSR 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 LM324ANSR?
For technical support, including LM324ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324ANSR requirements.
6.How does Aetrix verify that LM324ANSR is sourced from the original manufacturer or authorized distributors?
All LM324ANSR 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 LM324ANSR meets industry standards.
7.What is the process for return or replacement of LM324ANSR?
All LM324ANSR units undergo pre-shipment inspection (PSI). If there is an issue with LM324ANSR, 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 LM324ANSR part is unused and in its original packaging.
Return procedure for LM324ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324ANSR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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