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Texas Instruments LP324MTX/NOPB
- Part No.:
- LP324MTX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LP324MTX/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,100
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Product details
Overview
LP324MTX/NOPB from Texas Instruments is a micropower quad operational amplifier in 14-pin TSSOP (PW) package, featuring 85 μA typical supply current, 2 mV typical input offset voltage, and rail-to-ground input common-mode range - enabling single-supply operation in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the LP324MTX/NOPB datasheet, LP324MTX/NOPB pinout, LP324MTX/NOPB application, or LP324MTX/NOPB equivalent, key selection criteria include micropower consumption, ground-sensing input capability, CMOS logic compatibility, and thermal performance in compact TSSOP packaging for space-constrained embedded systems.
Technical Context
The LP324MTX/NOPB implements four independent, internally compensated op-amps with class-B output stages capable of both sourcing and sinking current. Its input stage supports common-mode voltages down to GND and interfaces directly with CMOS logic without level-shifting.
It operates across 3 V to 32 V single supply (or ±16 V dual), delivers 100 kHz gain-bandwidth product and 50 V/ms slew rate, and maintains stable operation driving capacitive loads up to 1000 pF - with no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 32 V single supply - enables direct use in 5 V, 12 V, and 24 V industrial/battery systems without regulation. |
| Quiescent Current (per amp) | 85 μA typical - allows four amplifiers to operate continuously on coin-cell batteries for years. |
| Input Offset Voltage | 2 mV typical - supports precision DC-coupled signal conditioning in low-level sensor front-ends. |
| Input Bias Current | 2 nA typical - minimizes error in high-impedance transducer interfaces (e.g., pH electrodes, photodiodes). |
| Input Common-Mode Range | Includes GND (0 V) - eliminates need for biasing networks in single-supply applications like 0–5 V analog sensors. |
| Output Swing (RL = ∞) | 0.7 V above GND / 1.9 V below V+ - provides usable dynamic range near supply rails in unipolar systems. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–audio-frequency signal processing, filtering, and slow-control loops. |
Pinout & Package
TSSOP-14 (PW) package: 5.0 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, exposed pad not electrically connected, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier A Output | Drives external load; class-B stage sinks/sours up to 10 mA source / 5 mA sink under specified conditions. |
| 2 | Amplifier A Inverting Input | High-impedance node (2 nA bias); adjacent to Pin 1 for minimal feedback trace length in PCB layout. |
| 3 | Amplifier A Non-Inverting Input | Accepts signals down to GND; enables true-differential sensing with rail-to-rail input capability. |
| 4 | V− (GND) | Ground reference for all amplifiers; common return path for input bias and output currents. |
| 5 | Amplifier B Non-Inverting Input | Independent input for second amplifier; supports multi-channel signal conditioning in same package. |
| 6 | Amplifier B Inverting Input | Paired with Pin 7 output; layout-optimized for inverting configurations with short feedback paths. |
| 7 | Amplifier B Output | Second independent output; corner placement simplifies routing in dense layouts. |
| 8 | V+ | Positive supply rail (3–32 V); decoupling capacitor recommended within 1 cm for stability. |
| 9 | Amplifier C Non-Inverting Input | Third amplifier input; identical electrical specs to Pins 2/3/5/6/10/13 - fully interchangeable per channel. |
| 10 | Amplifier C Inverting Input | Paired with Pin 8 V+ and Pin 9 - supports independent gain-setting resistors per channel. |
| 11 | Amplifier C Output | Third output; positioned at package corner to reduce crosstalk in multi-amplifier designs. |
| 12 | Amplifier D Inverting Input | Fourth amplifier inverting input; matches Pin 2/6/10 electrical behavior and layout intent. |
| 13 | Amplifier D Non-Inverting Input | Fourth independent input; enables simultaneous processing of four analog signals (e.g., quad sensor inputs). |
| 14 | Amplifier D Output | Fourth output; completes quad functionality; pin 14 placement avoids congestion near V+ (Pin 8). |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 85 μA per amplifier enables >10-year battery life in always-on environmental monitors using CR2032 cells. |
| Rail-to-ground input | Input common-mode extends to 0 V, eliminating input bias resistors in single-supply 0–3.3 V microcontroller ADC front-ends. |
| CMOS logic interface | Output swing reaches within 0.7 V of GND and 1.9 V below V+, allowing direct connection to 3.3 V or 5 V digital logic thresholds. |
| Capacitive load drive | Stable with 50–1000 pF loads - supports direct driving of ADC input capacitors or long PCB traces without isolation resistors. |
| Pin-for-pin LM324 replacement | Same 14-pin SOIC/TSSOP footprint and pinout as industry-standard LM324, enabling drop-in power reduction in legacy designs. |
Applications
| Portable Gas Sensor Interface | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying low-current outputs from electrochemical gas sensors (e.g., CO, NO₂) operating from 3.3 V lithium coin cell. IC Role / Device Role / Timing Role: Quad op-amp configured as transimpedance amplifier (Ch1), reference buffer (Ch2), filter stage (Ch3), and comparator hysteresis generator (Ch4). Use Value: 2 nA input bias prevents sensor current measurement error; 85 μA quiescent current extends 10-year field deployment without battery replacement. |
Use Scenario: Signal conditioning for thermistor, humidity, and light sensors in solar-charged remote weather station. IC Role / Device Role / Timing Role: Four independent amplifiers condition each sensor's analog output prior to MCU ADC sampling. Use Value: Rail-to-ground input allows direct 0–3.3 V sensor interfacing; quad integration reduces board area by 75% vs. discrete single-op-amp solutions. |
| Industrial 4–20 mA Loop Receiver | Medical Patient Monitor Front-End |
Use Scenario: Converting 4–20 mA loop current to 0–5 V voltage for PLC analog input modules in factory automation. IC Role / Device Role / Timing Role: Precision current-to-voltage converter (Ch1), offset calibration amplifier (Ch2), low-pass filter (Ch3), and fault detection comparator (Ch4). Use Value: 2 mV offset voltage ensures <±0.1% full-scale error in 16-bit DAQ systems; wide 3–32 V supply accommodates 24 V loop power directly. |
Use Scenario: Biopotential signal amplification (ECG, EMG) in handheld diagnostic devices powered by rechargeable Li-ion. IC Role / Device Role / Timing Role: Instrumentation-grade first-stage amplifier (Ch1), right-leg drive (Ch2), notch filter (Ch3), and lead-off detection (Ch4). Use Value: Ultra-low 2 nA input bias prevents electrode polarization errors; micropower operation enables >8-hour continuous monitoring per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DT | Higher 1.5 mA supply current per amp; 7 mV max offset; no guaranteed ground-sensing input. | Acceptable where power budget permits and input signals stay >1.5 V above GND. | Select when cost sensitivity outweighs power/performance needs and legacy LM324 layout reuse is mandatory. |
| TLV2464IPW | Lower 600 μA supply current; 1.6 mV max offset; rail-to-rail input/output; 2.2 MHz GBW. | Supports higher-speed AC coupling and wider dynamic range but requires 2.7–6 V supply only. | Choose for battery-powered audio or fast-response sensor systems needing RRO and >10× bandwidth, accepting tighter supply constraints. |
Compared with LM324DT and TLV2464IPW, LP324MTX/NOPB uniquely balances ultra-low power (85 μA), ground-sensing input, and 3–32 V operation - making it optimal for long-life, wide-supply industrial and portable instrumentation where neither legacy power-hungry nor modern narrow-supply alternatives suffice.
Availability
LP324MTX/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery backup equipment, and single-supply sensor interfaces requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for LP324MTX/NOPB 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 specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in precision analog ICs.
The LP324-N series was designed specifically for micropower, single-supply analog signal conditioning in battery-operated and energy-constrained systems - emphasizing low IQ, ground-referenced inputs, and robust industrial temperature operation.
FAQ
What is the operating temperature range for LP324MTX/NOPB?
The LP324MTX/NOPB is rated for 0°C to +70°C ambient operation, as confirmed in the TI PACKAGE OPTION ADDENDUM. This range applies specifically to the TSSOP (PW) packaged variants including LP324MTX/NOPB, distinguishing it from the −40°C to +85°C LP2902-N family. Designers must ensure thermal derating per θJA = 154°C/W (PW package) if power dissipation exceeds 100 mW.
Is LP324MTX/NOPB pin-compatible with LM324?
Yes, LP324MTX/NOPB is explicitly documented as pin-for-pin compatible with LM324 in TI's SNOSBX6C datasheet. It shares identical 14-pin TSSOP (PW) pinout, terminal functions, and PCB footprint - enabling direct substitution in existing LM324 designs to achieve ~95% reduction in supply current while maintaining functional equivalence in DC-coupled applications.
Does LP324MTX/NOPB support rail-to-rail output swing?
No, LP324MTX/NOPB does not provide rail-to-rail output. Per Electrical Characteristics table, its output swings to within 0.7 V of GND and 1.9 V below V+ under 350 μA load. This limited output range is intentional for micropower optimization and distinguishes it from RRO op-amps like TLV2464 - users requiring full rail compliance must add external level-shifting or select alternate devices.
Can LP324MTX/NOPB drive capacitive loads without oscillation?
Yes, LP324MTX/NOPB is characterized for stable operation with capacitive loads from 50 pF to 1000 pF, as stated in the APPLICATION HINTS section. This eliminates need for series isolation resistors when driving ADC input capacitors or long traces - a key advantage over standard LM324, which typically requires compensation for loads >100 pF.
What is the maximum supply voltage rating for LP324MTX/NOPB?
The absolute maximum supply voltage for LP324MTX/NOPB is 32 V (single supply) or ±16 V (dual supply), per Absolute Maximum Ratings table. Continuous operation is specified from 3 V to 32 V, making it suitable for 24 V industrial systems and high-voltage battery monitoring - but exceeding 32 V risks permanent damage even momentarily.
LP324MTX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 0.05V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 85µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
LP324MTX/NOPB FAQ
1.How can I place an order for LP324MTX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP324MTX/NOPB 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 LP324MTX/NOPB reliable?
The price and inventory of LP324MTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP324MTX/NOPB is usually 5 days.
3.What payment methods are accepted for LP324MTX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP324MTX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP324MTX/NOPB?
LP324MTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP324MTX/NOPB 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 LP324MTX/NOPB?
For technical support, including LP324MTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP324MTX/NOPB requirements.
6.How does Aetrix verify that LP324MTX/NOPB is sourced from the original manufacturer or authorized distributors?
All LP324MTX/NOPB 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 LP324MTX/NOPB meets industry standards.
7.What is the process for return or replacement of LP324MTX/NOPB?
All LP324MTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP324MTX/NOPB, 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 LP324MTX/NOPB part is unused and in its original packaging.
Return procedure for LP324MTX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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