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Texas Instruments LP324MT/NOPB
- Part No.:
- LP324MT/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LP324MT/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:317
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Product details
Overview
LP324MT/NOPB from Texas Instruments is a micropower quad operational amplifier in 14-pin TSSOP package, featuring 85 μA typical supply current, 2 mV typical input offset voltage, and rail-to-ground input common-mode range. It operates from 3 V to 32 V single supply and interfaces directly with CMOS logic, making it ideal for battery-powered instrumentation and portable sensor signal conditioning.
For engineers reviewing the LP324MT/NOPB datasheet, LP324MT/NOPB pinout, LP324MT/NOPB application, or LP324MT/NOPB equivalent, key selection criteria include micropower operation under 100 μA, ground-sensing input capability, guaranteed performance across 0°C to 70°C, and compatibility with legacy LM324 layouts using TSSOP footprint.
Technical Context
The LP324MT/NOPB integrates four internally compensated, high-gain op-amps with class-B output stages enabling both sourcing and sinking of up to 10 mA output current. Its input stage supports common-mode voltages down to GND and tolerates differential inputs beyond supply rails without damage.
Designed for single-supply systems, it eliminates need for input biasing in sensor interfaces and provides stable unity-gain operation with capacitive loads up to 1000 pF. The device uses bipolar process technology and features ESD protection rated at ±500 V (HBM).
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 and portable systems without level-shifting. |
| Quiescent Current per Amplifier | 85 μA typ - allows four-channel amplification in coin-cell–powered devices with multi-year battery life. |
| Input Offset Voltage | 2 mV typ - supports accurate DC-coupled signal conditioning in precision sensor front-ends (e.g., thermistor, strain gauge). |
| Input Bias Current | 2 nA typ - minimizes voltage error across high-impedance sources like photodiodes or pH electrodes. |
| Input Common-Mode Range | 0 V to V+ − 1.5 V - permits direct connection of transducer outputs referenced to ground without external bias networks. |
| Output Swing (RL = 10 kΩ) | 0.7 V above GND / 1.9 V below V+ - delivers usable dynamic range in single-supply 3.3 V or 5 V microcontroller interfaces. |
| Gain Bandwidth Product | 100 kHz - suitable for low-frequency signal processing including filtering, integration, and slow-settling control loops. |
Pinout & Package
TSSOP-14 (PW) package: 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier A Output | Provides buffered output of first op-amp; placed at corner for minimal trace length in feedback layout. |
| 2 | Amplifier A Inverting Input | Accepts feedback or signal inversion node; adjacent to Pin 1 to reduce parasitic inductance in closed-loop paths. |
| 3 | Amplifier A Non-Inverting Input | High-impedance input for reference or sensor signal; supports rail-to-ground common-mode operation. |
| 4 | V− (GND) | Power return for all four amplifiers; must be low-impedance connection to minimize crosstalk and offset drift. |
| 5 | Amplifier B Non-Inverting Input | Independent input for second channel; electrically isolated from other inputs except via shared supply rails. |
| 6 | Amplifier B Inverting Input | Feedback node for second amplifier; positioned opposite Pin 7 to support symmetrical PCB routing. |
| 7 | Amplifier B Output | Second channel output; corner placement aids decoupling capacitor placement near supply pins. |
| 8 | V+ | Positive supply for all amplifiers; requires local 100 nF ceramic bypass capacitor to GND (Pin 4). |
| 9 | Amplifier C Output | Third channel output; shares same electrical characteristics and thermal coupling as Pins 1 and 7. |
| 10 | Amplifier C Inverting Input | Feedback terminal for third op-amp; layout symmetry reduces mismatch-induced errors across channels. |
| 11 | Amplifier C Non-Inverting Input | Third independent input; validated for operation at 0 V common-mode voltage per datasheet Figure 3. |
| 12 | Amplifier D Non-Inverting Input | Fourth channel input; identical DC specs to Pins 3 and 11; no internal trimming or calibration. |
| 13 | Amplifier D Inverting Input | Fourth feedback node; pin adjacency to Pin 14 supports compact inverting amplifier layout. |
| 14 | Amplifier D Output | Final channel output; full rail-to-rail sourcing/sinking capability confirmed per Electrical Characteristics table. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 85 μA per amplifier enables four-channel analog front-end in energy-constrained IoT nodes with >5-year CR2032 life. |
| Rail-to-Ground Input Stage | Common-mode range includes 0 V, eliminating need for external bias resistors when interfacing with grounded sensors. |
| CMOS Logic Compatibility | Output swing to within 0.7 V of GND ensures reliable TTL/CMOS input recognition without pull-up resistors. |
| Capacitive Load Drive | Stable with 50–1000 pF loads - supports direct connection to ADC input capacitors or long PCB traces without isolation resistors. |
| Pin-for-Pin LM324 Replacement | Same 14-pin TSSOP pinout as LM324 but with 10× lower supply current and improved input bias specs. |
Applications
| Portable Gas Sensor Interface | Battery Backup Voltage Monitor |
|---|---|
Use Scenario: Amplifying low-level electrochemical sensor output (nA–μA range) in handheld air quality meters powered by Li-ion cells. IC Role / Device Role / Timing Role: Quad op-amp configured as transimpedance amplifier, filter, reference buffer, and comparator hysteresis generator. Use Value: 2 nA input bias current prevents signal loss across high-value feedback resistors; 85 μA quiescent current extends runtime between charges. | Use Scenario: Monitoring backup battery voltage during main power failure in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Four independent comparators detecting undervoltage thresholds on VBAT, VDD, temperature sensor, and watchdog timeout. Use Value: Rail-to-ground input allows direct sensing of 0 V–3.3 V battery range; 2 mV offset ensures <10 mV detection hysteresis without trimming. |
| Medical Pulse Oximeter Front-End | Smart Thermostat Ambient Sensing |
Use Scenario: Conditioning red/IR photodiode signals and driving LED drivers in wearable pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier, AC-coupled gain stage, LED current sink control, and ambient light rejection filter. Use Value: Class-B output stage sinks 10 mA for LED drive; 100 kHz GBW supports 100 Hz modulation frequency with phase margin >45°. | Use Scenario: Signal conditioning for NTC thermistors, humidity sensors, and CO₂ detectors in Wi-Fi–enabled thermostats. IC Role / Device Role / Timing Role: Precision voltage follower for sensor excitation, differential amplifier for bridge outputs, integrator for averaging, and comparator for alarm thresholds. Use Value: 0°C–70°C operating range matches HVAC enclosure limits; 2 mV offset ensures ±0.5°C temperature accuracy with 10 kΩ NTC. |
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 amplifier; 7 mV max offset; no guaranteed ground-sensing input. | Acceptable where power budget >5 mA and offset <10 mV is sufficient; not suitable for sub-100 μA systems. | Select LM324DT only if legacy design reuse is required and micropower operation is unnecessary. |
| TLV2464IDR | RRIO output swing; 650 μA supply current; 1.6 mV offset; 2.5 V to 6 V supply range only. | Preferred for 3.3 V systems needing rail-to-rail output; unsuitable for 12 V/24 V industrial supplies. | Choose TLV2464IDR when output headroom below 100 mV is critical and supply is ≤5.5 V. |
Compared with LM324DT, LP324MT/NOPB reduces total quiescent power by 94% while maintaining pin compatibility; versus TLV2464IDR, it trades RRIO output for wider supply range and lower current, making it optimal for battery-backed 5–24 V sensor nodes.
Availability
LP324MT/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery backup monitoring, and industrial sensor interface designs requiring stable component supply across extended production cycles.
Supply support for LP324MT/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 and embedded processing technologies, with over 90 years of innovation in precision analog ICs.
The LP324 series belongs to TI's micropower operational amplifier product line, engineered specifically for ultra-low-power signal conditioning in battery-operated and energy-harvesting systems.
FAQ
What is the maximum operating temperature range for LP324MT/NOPB?
The LP324MT/NOPB is specified for operation from 0°C to +70°C ambient temperature, as confirmed in the Operating Conditions table of the SNOSBX6C datasheet. This range applies to the TSSOP (PW) package variant and is distinct from the LP2902-N's −40°C to +85°C rating. Exceeding 70°C may cause parametric shift beyond guaranteed limits, especially in supply current and offset voltage.
Does LP324MT/NOPB support true rail-to-rail input and output?
The LP324MT/NOPB supports rail-to-ground input common-mode range (0 V to V+ − 1.5 V), but does not provide rail-to-rail output swing. Its output can source to within 1.9 V of V+ and sink to within 0.7 V of GND under 350 μA load, as specified in the Electrical Characteristics table. For full rail-to-rail I/O, consider TI's TLV2464 or similar RRIO op-amps instead of LP324MT/NOPB.
Can LP324MT/NOPB replace LM324 in existing PCB layouts?
Yes, LP324MT/NOPB is pin-for-pin compatible with LM324 in TSSOP-14 (PW) packages, as explicitly stated in the Applications Hints section of the datasheet. However, due to its lower slew rate (50 V/ms vs. LM324's 0.5 V/ms) and reduced GBW (100 kHz vs. 1.2 MHz), AC performance may degrade in high-frequency circuits originally designed for LM324. Verify stability and bandwidth in final LP324MT/NOPB implementation.
What is the ESD rating of LP324MT/NOPB and how should it be handled?
The LP324MT/NOPB has an ESD susceptibility rating of ±500 V per Human Body Model (HBM), as documented in the Absolute Maximum Ratings table. During handling and assembly, leads must be shorted together or the device placed in conductive foam to prevent electrostatic damage to the MOS gates. Avoid contact with ungrounded surfaces and use ionized air blowers in SMT lines to mitigate charge accumulation near LP324MT/NOPB placements.
Is LP324MT/NOPB suitable for driving ADC input capacitors directly?
Yes, LP324MT/NOPB is characterized for stable operation with capacitive loads from 50 pF to 1000 pF, as noted in the Applications Hints section. This makes it suitable for direct connection to successive-approximation register (SAR) ADC input sampling capacitors without isolation resistors. Ensure supply bypassing (100 nF ceramic at V+ and GND pins) is implemented per layout guidelines to maintain stability under dynamic load conditions.
LP324MT/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
LP324MT/NOPB FAQ
1.How can I place an order for LP324MT/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP324MT/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 LP324MT/NOPB reliable?
The price and inventory of LP324MT/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP324MT/NOPB is usually 5 days.
3.What payment methods are accepted for LP324MT/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP324MT/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP324MT/NOPB?
LP324MT/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP324MT/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 LP324MT/NOPB?
For technical support, including LP324MT/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP324MT/NOPB requirements.
6.How does Aetrix verify that LP324MT/NOPB is sourced from the original manufacturer or authorized distributors?
All LP324MT/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 LP324MT/NOPB meets industry standards.
7.What is the process for return or replacement of LP324MT/NOPB?
All LP324MT/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP324MT/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 LP324MT/NOPB part is unused and in its original packaging.
Return procedure for LP324MT/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP324MT/NOPB Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
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LM358P
Texas Instruments
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