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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics LM324AWPT

Name: LM324AWPT
Brand: STMicroelectronics
SKU: LM324AWPT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM324AWPT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: LM324AWPT.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,704

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Product details

Overview

LM324AWPT from STMicroelectronics is a quad low-power operational amplifier in TSSOP-14 package, designed for single-supply operation from 3 V to 30 V or dual supplies ±1.5 V to ±15 V. It delivers 1.3 MHz gain bandwidth, 100 dB large-signal voltage gain, and rail-to-rail output swing (26 V high-level, 20 mV low-level at 30 V supply), with input common-mode range extending to ground-enabling use in sensor signal conditioning, industrial analog front-ends, and battery-powered instrumentation.

For engineers reviewing the LM324AWPT datasheet, LM324AWPT pinout, LM324AWPT application, or LM324AWPT equivalent, key selection criteria include its 3 mV max input offset voltage (25 °C), 700 V HBM ESD rating, 375 µA per-amplifier supply current, and guaranteed operation across 0 °C to 70 °C ambient temperature-critical for cost-sensitive, wide-voltage-range analog systems requiring robustness and precision.

Technical Context

The LM324AWPT implements internally frequency-compensated, high-gain DC-coupled amplifiers with PNP input stages enabling ground-sensing capability and rail-to-rail output stage architecture supporting full-swing operation into 2 kΩ loads. Its differential input voltage limit of ±32 V and absolute maximum supply of ±16 V / 32 V allow safe operation in noisy industrial environments.

Thermal design is supported by R_thJA = 100 °C/W (TSSOP14) and R_thJC = 32 °C/W, while ESD protection (700 V HBM, 1500 V CDM) meets automotive-grade reliability requirements without external clamping. Input bias current remains stable at 20 nA (typ) across temperature, minimizing error in high-impedance transducer interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain Bandwidth Product	1.3 MHz - sets usable closed-loop bandwidth for unity-gain stable configurations up to ~1.3 MHz
Input Offset Voltage (max)	3 mV @ 25 °C - limits DC error in precision gain stages and sensor amplifiers
Supply Current per Amplifier	375 µA - enables ultra-low-power operation in always-on monitoring circuits
Common-Mode Input Range	0 V to V_CC − 1.5 V - supports direct interfacing with grounded sensors and single-supply ADC drivers
Output Voltage Swing	26 V high / 20 mV low @ V_CC = 30 V - delivers near-rail performance for dynamic range maximization
ESD Rating (HBM)	700 V - exceeds standard industrial IEC 61000-4-2 Level 2 immunity requirements
Operating Temperature	0 °C to 70 °C - qualified for commercial and light-industrial ambient conditions

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package, 4.9 mm × 6.4 mm × 1.05 mm height) with exposed pad not electrically connected; JEDEC MS-012AC compliant. Pin 1 marked by dot or beveled corner.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting input (AMP1)	Accepts negative feedback or signal inversion node for first op-amp channel
2	Non-inverting input (AMP1)	Reference or positive signal input for first op-amp channel
3	Output (AMP1)	Amplified output of first channel; drives loads up to 40 mA sink/source
4	V_CC− (GND)	Ground reference for single-supply operation; connects to system 0 V plane
5	Inverting input (AMP2)	Second op-amp inverting input; isolated from AMP1 for multi-channel filtering
6	Non-inverting input (AMP2)	Second op-amp non-inverting input; supports independent gain configuration
7	Output (AMP2)	Output of second channel; shares no internal coupling with other outputs
8	Output (AMP3)	Third op-amp output; enables three-stage active filter or multi-sensor conditioning
9	Non-inverting input (AMP3)	Third channel positive input; allows simultaneous differential sensing
10	Inverting input (AMP3)	Third channel negative input; supports summing or inverting configurations
11	V_CC+	Positive supply rail; accepts 3–30 V single supply or +15 V in dual-rail mode
12	Inverting input (AMP4)	Fourth op-amp inverting input; completes quad-channel analog signal path
13	Non-inverting input (AMP4)	Fourth channel reference input; enables independent calibration or offset correction
14	Output (AMP4)	Final channel output; supports dedicated reference buffer or comparator hysteresis

Key Features

Feature	Design Value
Single-supply operation down to 3 V	Enables direct integration into 3.3 V and 5 V microcontroller-based systems without level-shifting
Input common-mode range includes ground	Eliminates need for input biasing networks when amplifying signals referenced to system ground
Low input bias current (20 nA typ)	Reduces voltage error in high-impedance pH probes, thermocouples, and photodiode transimpedance stages
Rail-to-rail output swing	Maximizes dynamic range in 30 V systems-delivers 26 V high/20 mV low output at full supply
Enhanced ESD rating (700 V HBM)	Provides built-in protection against handling-induced discharge during PCB assembly and field service

Applications

Industrial Sensor Signal Conditioning

Automotive Cabin Climate Control

Use Scenario: Amplifying millivolt-level outputs from RTDs, thermistors, and pressure transducers in PLC analog input modules.

IC Role / Device Role / Timing Role: Quad op-amp configured as precision instrumentation amplifier (Ch1–Ch2), low-pass filter (Ch3), and reference buffer (Ch4).

Use Value: 3 mV max V_io and 0–70 °C qualification ensure <±0.5% measurement error over operating range without recalibration.

Use Scenario: Processing cabin temperature, humidity, and sunlight sensor signals in HVAC control units.

IC Role / Device Role / Timing Role: Signal conditioning front-end for 12-bit SAR ADC; Ch1–Ch3 handle sensor buffers, Ch4 generates stable 2.5 V reference.

Use Value: 700 V HBM ESD rating withstands automotive assembly line discharge events; 375 µA per amp enables low-quiescent power in always-on modules.

Portable Medical Instrumentation

Consumer Audio Line-Level Processing

Use Scenario: Biopotential signal amplification (ECG, EMG) in battery-powered handheld diagnostics.

IC Role / Device Role / Timing Role: First-stage AC-coupled inverting amplifier (Ch1), high-Z non-inverting gain stage (Ch2), active bandpass filter (Ch3–Ch4).

Use Value: 1.3 MHz GBP supports >1 kHz bandwidth for physiological signals; 30 V supply headroom accommodates 9 V battery operation with margin.

Use Scenario: Tone control, volume adjustment, and headphone driver buffering in smart speakers and DAC output stages.

IC Role / Device Role / Timing Role: Dual-channel summing amplifier (Ch1–Ch2), bass/treble equalizer (Ch3), headphone buffer (Ch4).

Use Value: Rail-to-rail output swing preserves full 2 V_pp audio dynamic range into 32 Ω loads; low THD (0.015%) maintains fidelity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM324WPT	Same package and pinout; lower ESD rating (250 V HBM vs. 700 V), higher V_io (5 mV max)	Not suitable for ESD-prone automotive or industrial assembly lines	Select only if cost is primary constraint and ESD exposure is controlled
TSB572IDT	36 V supply, 0.15 mV V_io, 1.1 mA supply current, automotive AEC-Q100 Grade 1	Higher accuracy and voltage range but consumes >2× current; requires layout redesign	Choose for next-gen designs needing enhanced precision, wider supply, or automotive qualification

Compared with LM324WPT, LM324AWPT provides superior ESD robustness and tighter offset for production-ready industrial systems; versus TSB572IDT, it trades accuracy and voltage headroom for significantly lower quiescent power and legacy compatibility.

Availability

LM324AWPT is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive cabin electronics, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LM324AWPT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.

The LM324x series belongs to ST's general-purpose analog portfolio, engineered specifically for cost-effective, reliable signal conditioning in commercial and light-industrial applications where wide supply range, ground-sensing capability, and proven robustness are essential.

FAQ

What is the maximum supply voltage for LM324AWPT?

The absolute maximum supply voltage is 32 V for single-supply operation or ±16 V for dual supplies. Continuous operation above 30 V (single) or ±15 V (dual) risks exceeding thermal limits and degrading long-term reliability-even though the device may function temporarily. Derating is recommended for sustained 85 °C ambient conditions.

Does LM324AWPT support true rail-to-rail input?

No-LM324AWPT features input common-mode range that includes ground but extends only to V_CC − 1.5 V at 25 °C (V_CC − 2 V over full temperature). It does not accept inputs at the positive rail. However, its PNP input stage enables ground-referenced signal acquisition without external biasing, unlike rail-to-rail input op-amps.

Can LM324AWPT drive capacitive loads directly?

Stable operation is guaranteed for capacitive loads ≤100 pF with unity-gain configuration. Driving larger loads (e.g., >500 pF cables or ADC input capacitance) requires isolation via a series resistor (≥100 Ω) or external compensation to prevent peaking and oscillation, as confirmed by open-loop frequency response data in DS0985 Rev 8 Figure 10.

How does the 700 V HBM ESD rating impact board-level design?

The 700 V HBM rating means LM324AWPT can survive typical handling discharges without external protection diodes-reducing BOM count and PCB area. However, system-level IEC 61000-4-2 compliance still requires board-level TVS devices on exposed connectors, as HBM simulates human contact, not cable-borne surges.

LM324AWPT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: -

Slew Rate:: 0.4V/µs

Gain Bandwidth Product:: 1.3 MHz

-3db Bandwidth:: -

Current - Input Bias:: 20 nA

Voltage - Input Offset:: 2 mV

Current - Supply:: 1.5mA

Current - Output / Channel:: 40 mA

Voltage - Supply Span (Min):: 3 V

Voltage - Supply Span (Max):: 30 V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

LM324AWPT FAQ

1.How can I place an order for LM324AWPT through Aetrix?

Please submit a Request for Quotation (RFQ) for LM324AWPT 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 LM324AWPT reliable?

The price and inventory of LM324AWPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324AWPT is usually 5 days.

3.What payment methods are accepted for LM324AWPT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324AWPT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM324AWPT?

LM324AWPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM324AWPT 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 LM324AWPT?

For technical support, including LM324AWPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324AWPT requirements.

6.How does Aetrix verify that LM324AWPT is sourced from the original manufacturer or authorized distributors?

All LM324AWPT 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 LM324AWPT meets industry standards.

7.What is the process for return or replacement of LM324AWPT?

All LM324AWPT units undergo pre-shipment inspection (PSI). If there is an issue with LM324AWPT, 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 LM324AWPT part is unused and in its original packaging.

Return procedure for LM324AWPT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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