Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics LM224APT

Name: LM224APT
Brand: STMicroelectronics
SKU: LM224APT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LM224APT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: LM224APT.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14TSSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:54,849

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

LM224APT 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 input common-mode range extending to ground-enabling precision signal conditioning in industrial sensor interfaces and 24 V PLC analog front-ends.

For engineers reviewing the LM224APT datasheet, LM224APT pinout, LM224APT application, or LM224APT equivalent, key selection criteria include its 375 µA/amplifier supply current, 20 nA input bias current, 3 mV max input offset voltage (A-grade), rail-to-rail output swing capability, and automotive-qualified ESD robustness (800 V HBM).

Technical Context

The LM224APT implements internally compensated voltage-feedback op-amp architecture with PNP input stage, enabling true ground-sensing input operation and stable unity-gain performance. Its four independent amplifiers share no internal coupling, supporting isolated signal paths in multi-channel instrumentation.

Thermal design is constrained by R_thJA = 100 °C/W (TSSOP14) and maximum junction temperature of 150 °C; absolute maximum supply voltage is ±16 V or 32 V total, with input voltage limits of –0.3 V to V_CC + 0.3 V for A-grade variants.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain bandwidth product	1.3 MHz - supports stable closed-loop operation up to ~100 kHz at gain ≥10
Input offset voltage (max)	3 mV @ 25 °C - enables ≤0.1% error in 3 V full-scale 12-bit ADC driver applications
Supply current per amplifier	375 µA - allows four-channel operation under 1.5 mA total, suitable for battery-backed systems
Input bias current	20 nA - minimizes voltage error across high-impedance sensor sources (e.g., pH electrodes)
Common-mode input range	0 V to V_CC – 1.5 V - permits direct interfacing with 0–5 V or 0–24 V industrial sensors
Output drive capability	±40 mA - drives 100 Ω loads directly, eliminating need for external buffer stages
Slew rate	0.4 V/µs - sufficient for <10 kHz sinusoidal signals at 10 V_PP without distortion

Pinout & Package

TSSOP-14 (Thin Shrink Small Outline Package, 4.9 mm × 6.4 mm × 1.05 mm height) with gull-wing leads and exposed thermal pad not connected internally; JEDEC MS-012AC compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	Inverting input, Amp 1	Accepts differential input signal referenced to non-inverting input (Pin 2); high-impedance node (20 nA bias)
2	Non-inverting input, Amp 1	Reference input for Amp 1; common-mode range includes ground for single-supply sensor biasing
3	Output, Amp 1	Class AB output stage capable of sourcing/sinking ±40 mA into resistive loads
4	V_CC– (negative supply or ground)	Return path for all four amplifiers; connects to system ground in single-supply configurations
5	Inverting input, Amp 2	Independent input channel; electrically isolated from other amps to prevent crosstalk (≥120 dB @ 1 kHz)
6	Non-inverting input, Amp 2	Enables dual-channel instrumentation amplifier topologies with matched resistor networks
7	Output, Amp 2	Drives separate load; output short-circuit protected but requires thermal derating above 15 V supply
8	Output, Amp 3	Third independent output; shares same supply rails and thermal environment as other channels
9	Non-inverting input, Amp 3	Supports multi-stage filtering or cascaded gain blocks without inter-channel interference
10	Inverting input, Amp 3	Configurable for transimpedance or active filter applications with low input capacitance (≈1.5 pF)
11	Inverting input, Amp 4	Final channel input; layout symmetry recommended to match trace lengths with Pin 12
12	Non-inverting input, Amp 4	Used in reference voltage generation or level-shifting circuits requiring ground-referenced inputs
13	Output, Amp 4	Capable of driving capacitive loads up to 100 pF stably; larger loads require isolation resistor
14	V_CC+ (positive supply)	Primary power rail; supports wide 3–30 V range; supply rejection ratio ≥65 dB up to 100 Hz

Key Features

Feature	Design Value
Wide single-supply range	3 V to 30 V operation eliminates need for split supplies in industrial 24 V systems
Ground-sensing input	Input common-mode extends to 0 V, enabling direct connection to unipolar sensors (e.g., RTDs, thermocouples)
A-grade precision	3 mV max input offset voltage ensures <0.01% gain error in 300 mV full-scale medical sensor amplifiers
Low quiescent current	375 µA/amplifier enables four-channel operation within 1.5 mA budget for portable data loggers
High ESD robustness	800 V HBM rating meets IEC 61000-4-2 Level 2 requirements for industrial control panel interfaces

Applications

Industrial Sensor Signal Conditioning

Programmable Logic Controller (PLC) Analog Input Modules

Use Scenario: Amplifying low-level outputs from 4–20 mA current loop transmitters and resistive temperature detectors (RTDs) in factory automation cabinets.

IC Role / Device Role / Timing Role: Quad op-amp performs simultaneous I/V conversion, filtering, level shifting, and buffer functions across four independent analog channels.

Use Value: Single TSSOP-14 package replaces four discrete SOIC-8 op-amps, reducing PCB area by 65% and improving thermal matching between channels.

Use Scenario: Signal conditioning for analog inputs in DIN-rail mounted PLCs accepting 0–10 V, ±10 V, and thermocouple inputs.

IC Role / Device Role / Timing Role: Provides input protection, anti-alias filtering, gain adjustment, and output buffering before ADC sampling at 1–10 kSPS.

Use Value: Rail-to-rail output swing and ground-referenced inputs eliminate external level shifters, simplifying 24 V system design.

Automotive Body Control Modules (BCM)

Medical Patient Monitoring Front-Ends

Use Scenario: Interfacing with cabin temperature sensors, seat occupancy detection elements, and LED driver feedback loops in 12 V automotive BCMs.

IC Role / Device Role / Timing Role: Performs sensor biasing, signal amplification, and fault detection (via comparator-like windowing) across multiple subsystems.

Use Value: A-grade offset and 800 V HBM ESD rating meet ISO 10605 requirements without additional protection components.

Use Scenario: Biopotential signal amplification (ECG, EMG) in portable patient monitors with battery backup and low-power sleep modes.

IC Role / Device Role / Timing Role: First-stage instrumentation amplifier core (with external resistors) and active filter sections for noise suppression.

Use Value: 20 nA input bias current prevents electrode polarization errors; 375 µA/channel enables >100 hr battery life in continuous monitoring mode.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2902APT	Same pinout and electrical specs, but rated for –40 °C to 125 °C extended temp range and AEC-Q100 Grade 2 automotive qualification	Required for under-hood automotive applications; not necessary for industrial ambient (–40 °C to 105 °C) use	Select LM2902APT when automotive qualification or extended high-temp operation (>105 °C) is mandatory
TSB572IPT	36 V supply range, 1.8 MHz GBW, 125 µA/amplifier, 150 µV max V_io, 4 kV HBM ESD	Higher accuracy, lower power, and enhanced ESD for next-gen industrial IoT nodes and precision data acquisition	Choose TSB572IPT when upgrading for improved DC accuracy, wider supply margin, or higher reliability in harsh ESD environments

Compared with LM224APT, LM2902APT adds automotive qualification and extended temperature range without changing footprint or basic functionality, while TSB572IPT offers superior precision and efficiency at the cost of higher unit price and different supply voltage headroom.

Availability

LM224APT is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) analog input modules, and automotive body control modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LM224APT 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, specializing in microcontrollers, power management, analog ICs, and MEMS sensors for industrial, automotive, and consumer markets.

The LM224x series belongs to ST's legacy precision analog portfolio, engineered specifically for cost-sensitive, high-volume industrial control and sensor interface applications where reliability, wide supply range, and ground-sensing capability are critical.

FAQ

Is LM224APT pin-compatible with LM324APT?

Yes, LM224APT and LM324APT share identical TSSOP-14 pinout, electrical specifications, and functional behavior. The only difference is operating temperature range: LM224APT is rated for –40 °C to 105 °C, while LM324APT is limited to 0 °C to 70 °C. Both use the same A-grade (3 mV max V_io) silicon and packaging.

Can LM224APT drive capacitive loads directly?

LM224APT can drive up to 100 pF capacitive loads stably in unity-gain follower configuration, as confirmed by Figure 14 (small-signal pulse response) in DS0985 Rev 8. For loads exceeding 100 pF, a series isolation resistor (typically 10–100 Ω) must be added between output and capacitor to maintain phase margin and prevent oscillation.

What is the maximum safe output short-circuit duration?

LM224APT features indefinite (infinite) output short-circuit duration per amplifier under normal conditions, as specified in Table 1 (Absolute Maximum Ratings). However, simultaneous short-circuits on all four amplifiers at V_CC > 15 V cause excessive heating due to combined power dissipation; thermal shutdown is not integrated, so board-level current limiting or thermal monitoring is advised in such cases.

Does LM224APT require external frequency compensation?

No, LM224APT includes internal frequency compensation optimized for unity-gain stability across its full operating range (3 V to 30 V). No external compensation components are needed for standard inverting, non-inverting, or voltage-follower configurations, as verified by open-loop frequency response (Figure 10) and large-signal step response (Figure 12) in the official datasheet.

LM224APT 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:: -40°C ~ 105°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

LM224APT FAQ

1.How can I place an order for LM224APT through Aetrix?

Please submit a Request for Quotation (RFQ) for LM224APT 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 LM224APT reliable?

The price and inventory of LM224APT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224APT is usually 5 days.

3.What payment methods are accepted for LM224APT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224APT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM224APT?

LM224APT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM224APT 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 LM224APT?

For technical support, including LM224APT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224APT requirements.

6.How does Aetrix verify that LM224APT is sourced from the original manufacturer or authorized distributors?

All LM224APT 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 LM224APT meets industry standards.

7.What is the process for return or replacement of LM224APT?

All LM224APT units undergo pre-shipment inspection (PSI). If there is an issue with LM224APT, 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 LM224APT part is unused and in its original packaging.

Return procedure for LM224APT:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…