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Texas Instruments LP324N/NOPB
- Part No.:
- LP324N/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LP324N/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:191
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Product details
Overview
LP324N/NOPB from Texas Instruments is a micropower quad operational amplifier optimized for single-supply battery-powered systems, featuring 85 μA typical supply current, 2 mV typical input offset voltage, 2 nA typical input bias current, and rail-to-ground input common-mode range. It serves as a low-power signal conditioning and amplification stage in portable instrumentation and sensor interfaces.
For engineers reviewing the LP324N/NOPB datasheet, LP324N/NOPB pinout, LP324N/NOPB application, or LP324N/NOPB equivalent, key selection criteria include micropower operation (≤150 μA max), ground-sensing input capability, CMOS logic compatibility, and PDIP-14 packaging for through-hole prototyping and industrial control modules.
Technical Context
The LP324N/NOPB integrates four independent, internally compensated 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 ground (0 V) and operates across a 3 V to 32 V single-supply range.
It delivers 100 kHz gain-bandwidth product and 50 V/ms slew rate, with 90 dB minimum PSRR and CMRR over 0 V to (V+ − 1.5 V) common-mode range. Input protection avoids clamping diodes, allowing differential inputs exceeding V+ without damage-subject to −0.3 V absolute minimum input voltage relative to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 85 μA typ per amplifier - enables multi-year battery life in always-on sensor nodes |
| Input Offset Voltage | 2 mV typ - supports accurate DC-coupled amplification of mV-level transducer signals |
| Input Bias Current | 2 nA typ - minimizes voltage error in high-impedance pH or photodiode front-ends |
| Common-Mode Range | 0 V to (V+ − 1.5 V) - allows direct interfacing to ground-referenced sensors without level-shifting |
| Output Swing | 3.6 V min high / 0.7 V max low (at V+ = 5 V, IL = 350 μA) - provides usable headroom near rails in 5 V systems |
| Gain-Bandwidth | 100 kHz - sufficient for anti-aliasing, sensor filtering, and slow-control-loop compensation |
| Slew Rate | 50 V/ms - limits large-signal response but ensures stability with 50–1000 pF capacitive loads |
Pinout & Package
LP324N/NOPB is housed in a 14-pin plastic dual in-line package (PDIP-N), 0.300-inch wide body, with 0.100-inch lead pitch and through-hole mounting. Thermal resistance θJA is 140°C/W (N package).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Amplifier A Output | Drives external load; class-B stage sinks/sourses ≤10 mA; no external pull-up needed |
| 2 | Amplifier A Inverting Input | High-impedance node; adjacent to Pin 1 for compact feedback layout |
| 3 | Amplifier A Non-Inverting Input | Accepts ground-referenced signals directly; supports rail-to-rail common-mode |
| 4 | V− (GND) | Ground reference for all amplifiers; required return path for bias and load currents |
| 5 | Amplifier B Non-Inverting Input | Independent input; shares same ground reference and supply as other sections |
| 6 | Amplifier B Inverting Input | Paired with Pin 7 output for local feedback; minimizes trace inductance |
| 7 | Amplifier B Output | Second output; corner pin placement simplifies PCB routing in multi-channel designs |
| 8 | Amplifier C Output | Third output; positioned opposite Pin 1 to balance thermal distribution |
| 9 | Amplifier C Inverting Input | Matches Pin 2/6 functionality; supports identical circuit topologies per channel |
| 10 | Amplifier C Non-Inverting Input | Enables three independent ground-sensing channels on one IC |
| 11 | V+ | Positive supply rail; accepts 3–32 V; decoupling capacitor recommended at pin |
| 12 | Amplifier D Non-Inverting Input | Fourth channel input; completes quad configuration for multi-sensor aggregation |
| 13 | Amplifier D Inverting Input | Paired with Pin 14; supports unity-gain buffer or precision inverting gain |
| 14 | Amplifier D Output | Final output; corner pin placement aids heat dissipation and layout symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 85 μA per amplifier enables >5-year operation on CR2032 coin cells in wake-on-event sensor nodes |
| Rail-to-Ground Input | 0 V input common-mode allows direct connection to thermistors, RTDs, and bridge sensors without bias resistors |
| CMOS Logic Compatibility | Output swing to within 0.7 V of GND and 3.6 V below V+ at 5 V supply meets 74HC logic thresholds |
| Capacitive Load Stability | No external compensation required for 50–1000 pF loads - simplifies filter and cable-drive designs |
| Pin-for-Pin LM324 Replacement | Direct drop-in upgrade path with 10× lower quiescent current and identical footprint |
Applications
| Portable Gas Sensor Signal Chain | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying low-level mV outputs from electrochemical gas sensors powered by Li-MnO₂ cells. IC Role / Device Role / Timing Role: Quad op-amp performs sensor biasing, transimpedance conversion, low-pass filtering, and level-shifting before ADC sampling. Use Value: 85 μA per amplifier extends 2-cell battery life beyond 3 years while maintaining sub-mV DC accuracy. | Use Scenario: Conditioning analog outputs from temperature, humidity, and pressure sensors in field-deployed environmental monitors. IC Role / Device Role / Timing Role: Four independent amplifiers condition each sensor's output with matched gain/offset prior to multiplexed ADC acquisition. Use Value: Rail-to-ground input eliminates need for external bias networks, reducing BOM count and board area by 30%. |
| Industrial Thermostat Interface | Low-Power Smoke Detector Analog Front-End |
Use Scenario: Interfacing NTC thermistors and HVAC control relays in residential thermostats using 24 VAC-derived DC supply. IC Role / Device Role / Timing Role: One amplifier buffers reference voltage; others condition thermistor voltage divider and drive optocoupler inputs. Use Value: Wide 3–32 V supply range accommodates unregulated rectified AC supplies without LDO pre-regulation. | Use Scenario: Amplifying ionization chamber current pulses in battery-operated smoke alarms with 10-year shelf life. IC Role / Device Role / Timing Role: High-input-impedance amplifier converts pA-level chamber current into measurable voltage for comparator triggering. Use Value: 2 nA input bias current prevents signal corruption from leakage paths in high-resistance chamber circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324N/NOPB | 10× higher supply current (1.2 mA typ), no rail-to-ground input, wider temp range (−25°C to +85°C) | Preferred where AC performance (1.2 MHz GBW) outweighs power savings | Select when driving heavier loads or requiring faster settling in non-battery systems |
| TLV2464CDR | Higher supply current (550 μA typ), rail-to-rail I/O, 6.4 MHz GBW, SOIC-14 only | Used where full rail-to-rail output swing and higher bandwidth are mandatory | Choose for precision data acquisition with 16-bit ADCs requiring >1 Vpp dynamic range |
Compared with LM324N/NOPB and TLV2464CDR, LP324N/NOPB uniquely balances ultra-low quiescent current, ground-sensing inputs, and PDIP-14 availability-making it optimal for cost-sensitive, long-life, through-hole industrial controls where bandwidth <100 kHz suffices.
Availability
LP324N/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery backup equipment, and industrial thermostat interfaces requiring stable component supply and long-term obsolescence management.
Supply support for LP324N/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and broad design support.
The LP324-N series belongs to TI's legacy micropower op-amp portfolio, engineered specifically for battery-constrained applications demanding low IQ, ground-referenced operation, and pin-compatible LM324 upgrades.
FAQ
What is the operating temperature range for LP324N/NOPB?
The LP324N/NOPB is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with its target use in consumer and industrial control applications-not extended or automotive grades. The LP2902-N variant supports −40°C to +85°C, but LP324N/NOPB does not. Always verify thermal derating using θJA = 140°C/W when power dissipation exceeds 100 mW in enclosed environments.
Does LP324N/NOPB support true rail-to-rail input and output?
LP324N/NOPB supports rail-to-ground input (common-mode down to 0 V) but not full rail-to-rail output: output swings to within ~0.7 V of GND and ~1.9 V below V+ under 350 μA load. It is not a rail-to-rail output device like the TLV2464. For applications requiring output within 50 mV of either rail, consider upgrading to a modern RRO op-amp-LP324N/NOPB prioritizes micropower over output swing.
Can LP324N/NOPB replace LM324N/NOPB without circuit changes?
Yes-LP324N/NOPB is explicitly designed as a pin-for-pin, functionally compatible replacement for LM324N/NOPB with identical PDIP-14 pinout and connection diagram. However, due to its reduced slew rate (50 V/ms vs. 0.5 V/ms) and GBW (100 kHz vs. 1.2 MHz), AC-coupled or high-frequency circuits may require gain or compensation adjustments. DC and low-speed applications typically require zero modifications.
What is the maximum supply voltage rating for LP324N/NOPB?
The absolute maximum supply voltage for LP324N/NOPB is 32 V (or ±16 V in dual-supply mode). Operating voltage range is 3 V to 32 V DC. Exceeding 32 V risks permanent damage. Note that the LP2902-N variant is limited to 26 V max-do not substitute LP2902-N/NOPB in 30 V systems expecting LP324N/NOPB robustness.
Is LP324N/NOPB RoHS compliant and lead-free?
Yes-LP324N/NOPB is RoHS compliant and features NiPdAu (NIPDAU) lead finish, as confirmed in TI's PACKAGE OPTION ADDENDUM. The "NOPB" suffix explicitly denotes lead-free packaging. MSL rating is Level-1 with unlimited floor life, and reflow peak temperature is rated at 260°C for Pb-free processes. No exemptions apply.
LP324N/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- 150µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LP324N/NOPB FAQ
1.How can I place an order for LP324N/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP324N/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 LP324N/NOPB reliable?
The price and inventory of LP324N/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP324N/NOPB is usually 5 days.
3.What payment methods are accepted for LP324N/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP324N/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP324N/NOPB?
LP324N/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP324N/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 LP324N/NOPB?
For technical support, including LP324N/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP324N/NOPB requirements.
6.How does Aetrix verify that LP324N/NOPB is sourced from the original manufacturer or authorized distributors?
All LP324N/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 LP324N/NOPB meets industry standards.
7.What is the process for return or replacement of LP324N/NOPB?
All LP324N/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP324N/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 LP324N/NOPB part is unused and in its original packaging.
Return procedure for LP324N/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP324N/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
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
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