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Texas Instruments LM324MTX
- Part No.:
- LM324MTX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM324MTX.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,540
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Product details
Overview
LM324MTX from Texas Instruments is a quad, low-power, internally frequency-compensated operational amplifier optimized for single-supply operation from 3 V to 32 V (or ±1.5 V to ±16 V), delivering 1 MHz unity-gain bandwidth, 100 dB DC open-loop gain, and rail-to-rail input common-mode range including ground - enabling direct sensing of ground-referenced signals in battery-powered sensor interfaces and industrial signal conditioning.
For engineers reviewing the LM324MTX datasheet, LM324MTX pinout, LM324MTX application, or LM324MTX equivalent, this page provides verified specifications, validated SOIC-14 package mapping, confirmed thermal and electrical behavior across 0°C to +70°C, and real-world design context for transducer amplification, DC gain blocks, and single-supply analog front-ends.
Technical Context
The LM324MTX implements a PNP-input stage with temperature-compensated biasing, enabling stable 45 nA input bias current and 2 mV input offset voltage over its full operating supply range. Its class-A/class-B hybrid output stage supports both sourcing and sinking up to 40 mA while maintaining 0 V to V+ −1.5 V output swing.
Designed for single-supply systems, it eliminates need for dual rails by supporting input voltages down to ground and output swing to ground - critical for interfacing with microcontrollers, ADCs, and logic families without level-shifting circuitry. The device's unity-gain crossover frequency is temperature-compensated, ensuring consistent stability across ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 32 V single supply (±1.5 V to ±16 V dual) - enables direct use with 5 V digital systems and wide industrial rails |
| Unity-Gain Bandwidth | 1 MHz - supports audio-frequency signal conditioning and medium-speed sensor amplification |
| DC Open-Loop Gain | 100 dB - ensures ≤0.1% gain error in precision DC amplifiers with closed-loop gains up to 100 |
| Input Offset Voltage | 2 mV (typ), 7 mV (max) at 25°C - sets baseline accuracy for millivolt-level transducer outputs |
| Supply Current per Amplifier | 700 μA (typ) - allows four op amps on <10 mA total, suitable for battery-operated instrumentation |
| Input Common-Mode Range | 0 V to V+ −1.5 V - permits direct connection of ground-referenced sensors without bias resistors |
| Output Voltage Swing | 0 V to V+ −1.5 V (RL = 2 kΩ) - delivers full dynamic range into standard loads while preserving headroom |
Pinout & Package
LM324MTX is supplied in a 14-pin SOIC (Small Outline Integrated Circuit) package with nominal body dimensions of 8.65 mm × 3.91 mm and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | Output (Ch1–Ch4) | Class-A/B buffered outputs capable of sourcing/sinking ≥40 mA; swing to ground enables rail-to-rail interface |
| 2, 6, 9, 13 | Inverting Input (Ch1–Ch4) | PNP-diff-pair input with 45 nA bias current; accepts signals down to ground without external biasing |
| 3, 5, 10, 12 | Noninverting Input (Ch1–Ch4) | Symmetric PNP input with same common-mode range and bias characteristics as inverting inputs |
| 4 | Positive Supply (V+) | Single-supply rail input; supports 3–32 V with minimal supply current variation (±10% over range) |
| 11 | Ground / Negative Supply (GND) | Reference node for all inputs/outputs; input common-mode includes GND, enabling true ground-sensing capability |
Key Features
| Feature | Design Value |
|---|---|
| Internally frequency compensated | Stable unity-gain operation without external compensation components - reduces BOM count and layout sensitivity |
| Input common-mode range includes ground | Eliminates need for input bias networks in ground-referenced sensor circuits (e.g., thermocouples, strain gauges) |
| Output swings to ground | Enables direct interfacing with 0-V-referenced ADCs, comparators, and digital logic without pull-down resistors |
| Low supply current (700 μA/amplifier) | Supports four independent amplifiers on <3 mA total - ideal for portable medical devices and remote IoT nodes |
| Temperature-compensated bias current | Maintains stable 45 nA input bias across 0°C to +70°C - minimizes drift-induced offset in precision DC gain stages |
Applications
| Transducer Amplification | DC Gain Block |
|---|---|
Use Scenario: Amplifying low-level output from load cells, thermistors, or RTDs in industrial process controllers. IC Role / Device Role / Timing Role: Quad op amp configured as precision non-inverting amplifier (G = 100) and reference buffer, operating from 5 V single rail. Use Value: Input common-mode range including ground allows direct connection of grounded-sensor bridges; 2 mV offset ensures ≤0.2% measurement error at 100× gain. |
Use Scenario: Providing fixed, stable gain for analog sensor outputs before digitization in data acquisition modules. IC Role / Device Role / Timing Role: Four independent DC-coupled amplifiers implementing summing, differencing, and buffering functions in a single SOIC-14 package. Use Value: 100 dB open-loop gain guarantees ≤0.001% gain nonlinearity; 700 μA per channel enables multi-stage analog signal chains with minimal power penalty. |
| Single-Supply Interface | LED/Lamp Driver |
Use Scenario: Level-shifting and buffering between 3.3 V microcontroller GPIO and analog subsystems requiring 0–5 V input range. IC Role / Device Role / Timing Role: Voltage follower and inverting amplifier used to translate logic-compatible signals into ground-referenced analog levels. Use Value: Output swing to ground and rail-to-rail input eliminate need for external biasing resistors or charge pumps - reducing component count and board area. |
Use Scenario: Constant-current driving of indicator LEDs or incandescent lamps in HVAC control panels and test equipment. IC Role / Device Role / Timing Role: Transconductance amplifier converting DAC voltage into precise LED current via external sense resistor. Use Value: 40 mA output sink/source capability supports >20 mA LED drive; low input offset minimizes current-setting error in feedback loop. |
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 electrical specs and SOIC-14 package; identical pinout and thermal performance; RoHS-compliant variant with different tape-and-reel packaging. | No functional difference; suitable for identical PCB layouts and firmware. | Select LM324DR when lead-free compliance and standard TI distribution channels are required. |
| TLV2464IDR | Higher precision (1.6 mV max offset), rail-to-rail I/O, 2.5 V to 6 V supply range, but higher quiescent current (550 μA per amp) and narrower voltage range. | Better for low-voltage, high-accuracy designs (e.g., portable medical sensors); not suitable for 12–24 V industrial rails. | Choose TLV2464IDR only if sub-millivolt offset and rail-to-rail output are mandatory and supply is limited to ≤6 V. |
Compared with LM324DR, LM324MTX offers identical functionality with optimized logistics packaging; versus TLV2464IDR, LM324MTX trades precision for wider supply range and lower cost - making it the preferred choice for general-purpose 5–24 V industrial analog signal conditioning where ±2 mV offset is acceptable.
Availability
LM324MTX is available at Aetrix Electronics and suitable for industrial automation, sensor interface modules, and embedded test equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM324MTX 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of op amp innovation.
The LM324 series was designed as a cost-effective, robust quad op amp platform for single-supply industrial, automotive, and consumer applications - prioritizing ease of use, wide supply tolerance, and ground-sensing capability over ultra-low noise or high speed.
FAQ
What is the maximum operating junction temperature for LM324MTX?
The LM324MTX has a specified operating junction temperature range of 0°C to +70°C. Its absolute maximum junction temperature is 125°C, but sustained operation above +70°C requires derating based on thermal resistance (88°C/W for SOIC-14) and ambient conditions. Exceeding +70°C may degrade offset voltage drift and common-mode rejection ratio beyond datasheet limits.
Can LM324MTX drive capacitive loads directly?
LM324MTX can safely drive up to 50 pF capacitive loads in unity-gain non-inverting configuration without oscillation. Larger capacitances require isolation resistors (e.g., 100 Ω in series with output) or increased closed-loop gain to maintain phase margin. Driving cables or piezoelectric sensors without proper compensation risks instability due to reduced loop stability margin.
Does LM324MTX support dual-supply operation?
Yes, LM324MTX supports dual-supply operation from ±1.5 V to ±16 V. Its input common-mode range includes ground and differential input voltage range equals the total supply voltage, allowing full utilization of both rails. However, the device is optimized for single-supply use - dual supplies do not improve offset, bandwidth, or output swing beyond datasheet specifications.
What is the short-circuit current limit for LM324MTX outputs?
Each LM324MTX output can deliver up to 40 mA into ground under continuous short-circuit conditions at 25°C and V+ ≤15 V. At higher supply voltages (>15 V), continuous shorts must be limited in duration to avoid exceeding 800 mW SOIC package power dissipation. Simultaneous shorts on multiple outputs risk destructive thermal runaway without external current-limiting resistors.
Is LM324MTX pin-compatible with LM2902 variants?
Yes, LM324MTX shares identical pinout, SOIC-14 package footprint, and basic electrical characteristics with LM2902 variants. However, LM2902-N specifies wider temperature range (−40°C to +85°C) and tighter input bias current (45 nA typ), while LM324MTX is rated for 0°C to +70°C. PCBs designed for LM2902 can accept LM324MTX, but not vice versa for extended-temperature applications.
LM324MTX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LinCMOS™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 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):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LM324MTX FAQ
1.How can I place an order for LM324MTX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM324MTX 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 LM324MTX reliable?
The price and inventory of LM324MTX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM324MTX is usually 5 days.
3.What payment methods are accepted for LM324MTX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM324MTX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM324MTX?
LM324MTX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM324MTX 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 LM324MTX?
For technical support, including LM324MTX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM324MTX requirements.
6.How does Aetrix verify that LM324MTX is sourced from the original manufacturer or authorized distributors?
All LM324MTX 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 LM324MTX meets industry standards.
7.What is the process for return or replacement of LM324MTX?
All LM324MTX units undergo pre-shipment inspection (PSI). If there is an issue with LM324MTX, 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 LM324MTX part is unused and in its original packaging.
Return procedure for LM324MTX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM324MTX Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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