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Texas Instruments LM224KADRG4
- Part No.:
- LM224KADRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM224KADRG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,617
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Product details
Overview
LM224KADRG4 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 range (including V–), ±3 mV max input offset voltage at 25°C, 1.2 MHz gain-bandwidth product, and operates from 3V to 30V single-supply or ±15V dual-supply - enabling use in power supply monitoring, sensor signal conditioning, and motor control feedback loops.
For engineers reviewing the LM224KADRG4 datasheet, LM224KADRG4 pinout, LM224KADRG4 application, or LM224KADRG4 equivalent, key selection criteria include its guaranteed 3 mV offset (vs. 7 mV for standard LM324), –25°C to +85°C operating temperature range, SOIC-14 thermal resistance (RθJA = 99.3°C/W), and compatibility with legacy LM224/LM324 PCB layouts.
Technical Context
The LM224KADRG4 belongs to the LMx24 family of high-voltage op amps with unity-gain stability and internal frequency compensation. Its input stage supports common-mode voltages down to the negative rail, and output can swing within 1.5 V of the positive rail and 20 mV of the negative rail under 1 mA load - critical for single-supply precision amplification.
It features low quiescent current (1.2 mA typical for all four amplifiers), integrated EMI/RF filtering, and 500 V HBM ESD rating. Unlike B-version variants, it does not include enhanced ESD (2 kV) or improved offset drift, aligning with legacy LM224K specifications per TI SLOS066AE Rev. SEPTEMBER 2025.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V single-supply (or ±15 V dual); enables direct interface with 5 V, 12 V, and 24 V industrial rails |
| Input Offset Voltage (max) | ±3 mV at 25°C; ensures ≤ 30 mV error in unity-gain buffer at 10 V input |
| Gain-Bandwidth Product | 1.2 MHz; supports stable closed-loop gain up to 12 at 100 kHz |
| Common-Mode Input Range | Includes V– (ground in single-supply); allows direct sensing of 0 V referenced signals |
| Output Swing (min) | Within 1.5 V of V+ and 20 mV of V– at 1 mA load; preserves dynamic range in low-voltage systems |
| Quiescent Current (total) | 1.2 mA typical; enables <13 mW power dissipation at 12 V supply |
| Operating Temperature | –25°C to +85°C; qualified for indoor consumer and commercial equipment |
Pinout & Package
LM224KADRG4 uses the D (SOIC-14) package: 8.65 mm × 6 mm body, 1.27 mm lead pitch, gull-wing leads. Thermal pad absent. JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 7, 11 | No Connect (NC) | Unused pins; must remain unconnected per TI design |
| 2 | Inverting Input (Amp 1) | Differential input node for first op amp; high-impedance (4 GΩ || 1.5 pF) |
| 3 | Non-inverting Input (Amp 1) | Reference input for first op amp; accepts signals down to V– |
| 4 | VCC+ | Positive supply rail; decoupling capacitor required within 1 cm |
| 6 | Non-inverting Input (Amp 2) | Second op amp's reference input; electrically isolated from other inputs |
| 9 | Inverting Input (Amp 2) | Second op amp's differential input; shares no internal coupling with Amp 1 |
| 10 | Output (Amp 2) | Amplified output capable of sourcing/sinking ±20 mA (short-circuit protected) |
| 12 | Output (Amp 3) | Third op amp output; identical drive strength and rail-swing capability as Amp 2 |
| 13 | Inverting Input (Amp 3) | Third op amp input; validated for continuous operation at VCM = V– |
| 14 | Output (Amp 4) | Fourth op amp output; fully independent channel with same AC/DC specs |
| VCC– (Pin 11) | Negative Supply / Ground | Lowest potential node; serves as return path for all four amplifiers |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Accepts signals from V– to (V+) – 1.5 V, enabling ground-referenced sensor interfacing without level-shifting |
| Guaranteed 3 mV max input offset | Reduces DC error in precision gain stages - tighter than standard LM324 (7 mV) and suitable for 12-bit ADC front-ends |
| Unity-gain stable architecture | Operates reliably with no external compensation at gain = 1, simplifying design for buffers and active filters |
| Internal EMI/RF filtering | Suppresses high-frequency noise from switching power supplies and radio transceivers without added external components |
| Four independent amplifiers | Enables multi-channel signal processing (e.g., simultaneous current/voltage/temp sensing) on one IC, reducing board area and BOM count |
Applications
| Power Supply Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Real-time monitoring of 12 V DC bus voltage in industrial PLC power modules. IC Role / Device Role / Timing Role: Quad op amp configured as comparator (Amp 1), precision buffer (Amp 2), differential amplifier (Amp 3), and integrator (Amp 4) for regulation loop. Use Value: Single-chip solution replaces four discrete op amps, reducing layout complexity and improving thermal tracking between channels. | Use Scenario: Closed-loop speed control of a 24 V brushed DC motor in HVAC blower systems. IC Role / Device Role / Timing Role: Amplifies back-EMF signal (Amp 1), conditions hall-effect encoder output (Amp 2), sums error terms (Amp 3), and drives PWM comparator input (Amp 4). Use Value: Guaranteed 1.2 MHz GBW ensures <1 µs propagation delay in error amplification, supporting 20 kHz PWM switching. |
| Sensor Signal Conditioning | Multi-function Printer Analog Front-End |
Use Scenario: Amplifying low-level thermistor and RTD outputs in smart thermostats. IC Role / Device Role / Timing Role: Configured as instrumentation-grade difference amplifier (Amp 1–2), 2nd-order anti-alias filter (Amp 3), and reference buffer (Amp 4). Use Value: ±3 mV offset and 70 dB CMRR minimize DC drift and noise pickup in millivolt-range sensor signals. | Use Scenario: Processing analog signals from paper jam sensors, toner density detectors, and fuser temperature monitors. IC Role / Device Role / Timing Role: Four independent channels condition separate sensor types simultaneously - no cross-talk due to >120 dB channel separation. Use Value: SOIC-14 footprint matches legacy printer designs, allowing drop-in replacement without PCB rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM224KDR | Same electrical specs, identical SOIC-14 package, but lacks G4 suffix (RoHS-compliant plating) | No functional difference; G4 denotes green (lead-free) finish per JEDEC J-STD-609 | Select LM224KDR only if RoHS exemption applies; LM224KADRG4 is preferred for new designs requiring full compliance. |
| LM324ADR | 0°C to +70°C temp range (vs. –25°C to +85°C), 7 mV max offset (vs. 3 mV), same SOIC-14 package | Limited to commercial-grade applications; unsuitable for extended-temperature industrial environments | Choose LM324ADR only for cost-driven consumer products where ambient stays below 70°C and higher offset is acceptable. |
Compared with LM224KDR, LM224KADRG4 adds mandatory lead-free finish and full RoHS traceability; compared with LM324ADR, it extends temperature range by 25°C and halves offset voltage - directly improving accuracy in sensor and power monitoring circuits.
Availability
LM224KADRG4 is available at Aetrix Electronics and suitable for power supply monitoring, motor control feedback, and sensor signal conditioning requiring stable component supply across industrial production cycles.
Supply support for LM224KADRG4 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 over 50 years of op amp innovation and manufacturing excellence.
The LMx24 family - including LM224KADRG4 - was engineered for cost-sensitive, high-reliability analog signal conditioning in industrial, appliance, and infrastructure systems where robustness, long-term availability, and proven performance are essential.
FAQ
What is the maximum supply voltage for LM224KADRG4?
The absolute maximum supply voltage for LM224KADRG4 is 32 V, but the recommended operating range is 3 V to 30 V for single-supply operation (or ±15 V dual-supply). Exceeding 30 V risks exceeding safe power dissipation limits in SOIC-14 packaging, especially above 85°C ambient. TI specifies 30 V as the upper limit for reliable long-term operation per SLOS066AE Section 6.1.
Does LM224KADRG4 support rail-to-rail output swing?
No, LM224KADRG4 does not provide rail-to-rail output swing. Its output swings to within 1.5 V of V+ and 20 mV of V– at 1 mA load. At lighter loads (e.g., 50 µA), it reaches within 1.35 V of V+ and 100 mV of V–. This limited swing is inherent to its bipolar input/output architecture and is documented in Section 6.7 of the TI datasheet for LM224K devices.
Is LM224KADRG4 pin-compatible with LM324ADR?
Yes, LM224KADRG4 is pin-compatible with LM324ADR - both use SOIC-14 (D package) with identical pinout per TI's Pin Configuration and Functions table (Figure 5-1). However, LM224KADRG4 offers tighter offset (±3 mV vs. ±7 mV) and extended temperature range (–25°C to +85°C vs. 0°C to +70°C), making it a functional upgrade without layout changes.
What is the input bias current specification for LM224KADRG4?
The input bias current for LM224KADRG4 is –20 nA to –250 nA at 25°C (typical –150 nA), with full-range max of –500 nA across –25°C to +85°C. This value is confirmed in Table 6.7 of TI SLOS066AE for LM224K devices. It reflects the bipolar transistor input stage and impacts high-impedance source applications - e.g., >1 MΩ sensor bridges require offset compensation.
Can LM224KADRG4 be used in single-supply configurations?
Yes, LM224KADRG4 is explicitly designed for single-supply operation. Its input common-mode range includes V– (ground), and output can swing close to V– (20 mV at 1 mA), enabling direct interface with 0 V referenced sensors and microcontroller ADCs. TI recommends using V– as system ground and VCC+ as the positive rail, with proper decoupling at Pin 4.
LM224KADRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM224KADRG4 FAQ
1.How can I place an order for LM224KADRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM224KADRG4 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 LM224KADRG4 reliable?
The price and inventory of LM224KADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM224KADRG4 is usually 5 days.
3.What payment methods are accepted for LM224KADRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM224KADRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM224KADRG4?
LM224KADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM224KADRG4 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 LM224KADRG4?
For technical support, including LM224KADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM224KADRG4 requirements.
6.How does Aetrix verify that LM224KADRG4 is sourced from the original manufacturer or authorized distributors?
All LM224KADRG4 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 LM224KADRG4 meets industry standards.
7.What is the process for return or replacement of LM224KADRG4?
All LM224KADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM224KADRG4, 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 LM224KADRG4 part is unused and in its original packaging.
Return procedure for LM224KADRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM224KADRG4 Tags
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