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Texas Instruments LP324MT
- Part No.:
- LP324MT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LP324MT.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,892
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Product details
Overview
LP324MT 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. 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 datasheet, LP324MT pinout, LP324MT application, or LP324MT equivalent, key selection considerations include its micropower operation, ground-sensing inputs, single-supply compatibility, and pin-for-pin equivalence to LM324 - critical for low-power analog front-end upgrades and space-constrained PCB designs.
Technical Context
The LP324MT integrates four independent, internally compensated op-amps with class-B output stages enabling both sourcing and sinking capability. Its input stage supports common-mode voltages down to ground, eliminating need for input biasing in single-supply configurations.
It delivers 100 kHz gain-bandwidth product and 50 V/ms slew rate, optimized for DC-precision and low-frequency signal conditioning rather than high-speed AC performance. The device is rated for 0°C to +70°C ambient operation and features ±500 V HBM ESD rating.
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, or 24 V industrial/battery systems without level-shifting. |
| Quiescent Current (per amp) | 85 μA typ - reduces total system power by >90% vs. LM324, extending battery life in portable devices. |
| Input Offset Voltage | 2 mV typ - ensures <±5 mV error in unity-gain buffer or precision sensor amplification at room temperature. |
| Input Bias Current | 2 nA typ - minimizes voltage error across high-impedance sources (e.g., pH electrodes, photodiodes). |
| Input Common-Mode Range | 0 V to V+ − 1.5 V - allows direct connection of sensors referenced to ground without external bias networks. |
| Output Swing (RL = ∞) | 0.7 V above GND / 1.9 V below V+ - supports full-range signal capture in single-supply data acquisition. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control, consumer electronics, and auxiliary monitoring circuits. |
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, Sn lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output - placed at corner for minimal trace length; compatible with feedback routing to adjacent inverting input (Pin 2). |
| 2 | Inverting Input A | High-impedance node for A channel - adjacent to Output A (Pin 1) to simplify layout of inverting configurations. |
| 3 | Non-Inverting Input A | Reference input for A channel - supports ground-referenced sensing when used with rail-to-rail input stage. |
| 4 | V− (GND) | Ground reference terminal - shared return for all four amplifiers; must be low-impedance for noise immunity. |
| 5 | Non-Inverting Input B | Reference input for B channel - symmetrical placement enables matched layout with other channels. |
| 6 | Inverting Input B | High-impedance node for B channel - adjacent to Output B (Pin 7) per optimized pinout design. |
| 7 | Output B | Amplifier B output - corner pin; supports compact feedback loop with Pin 6. |
| 8 | V+ | Positive supply rail - decoupling capacitor recommended within 1 cm for stability with capacitive loads up to 1000 pF. |
| 9 | Output C | Amplifier C output - corner pin; matches layout symmetry of Outputs A and B. |
| 10 | Inverting Input C | High-impedance node for C channel - adjacent to Output C (Pin 9) to minimize parasitic inductance in feedback paths. |
| 11 | Non-Inverting Input C | Reference input for C channel - supports differential or single-ended configurations with ground-referenced signals. |
| 12 | Non-Inverting Input D | Reference input for D channel - completes quad symmetry; enables simultaneous multi-channel signal conditioning. |
| 13 | Inverting Input D | High-impedance node for D channel - adjacent to Output D (Pin 14) per TI's layout-optimized pin assignment. |
| 14 | Output D | Amplifier D output - corner pin; completes four-output layout with consistent routing geometry. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 85 μA per amplifier enables 4-channel analog front-end on coin-cell or energy-harvesting supplies. |
| Rail-to-ground input stage | 0 V input common-mode allows direct interface with grounded sensors (e.g., thermistors, strain gauges) without bias resistors. |
| CMOS logic compatibility | Output swing to within 0.7 V of GND and 1.9 V of V+ ensures reliable TTL/CMOS digital interfacing without level shifters. |
| Capacitive load drive | Stable with 50–1000 pF loads - eliminates need for isolation resistors in filter or ADC driver applications. |
| Pin-for-pin LM324 replacement | Direct drop-in upgrade path for legacy designs seeking >90% supply current reduction without PCB rework. |
Applications
| Portable Instrumentation | Battery Backup Monitoring |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level sensor outputs with auto-ranging. IC Role / Device Role / Timing Role: Quad op-amp providing programmable gain, offset correction, and buffer isolation for dual-channel measurement paths. Use Value: 2 nA input bias current prevents loading of high-Z probe circuits; 85 μA quiescent current extends alkaline battery life beyond 100 hours. |
Use Scenario: UPS or telecom backup system monitoring battery voltage, temperature, and charge current. IC Role / Device Role / Timing Role: Signal conditioner converting shunt voltage, thermistor resistance, and reference voltage into clean ADC inputs. Use Value: Rail-to-ground inputs accept 0 V–3.3 V sensor ranges directly; low supply current minimizes parasitic drain during standby. |
| Low-Power Sensor Interface | Single-Supply Signal Conditioning |
Use Scenario: IoT environmental node measuring CO₂, humidity, and ambient light with microcontroller ADC. IC Role / Device Role / Timing Role: Four-channel amplifier network conditioning passive sensor outputs before 12-bit SAR ADC sampling. Use Value: 2 mV offset voltage ensures <0.1% full-scale error in 3.3 V ADC range; TSSOP-14 footprint saves >40% board area vs. SOIC-14. |
Use Scenario: Industrial controller analog input module accepting 0–10 V or 4–20 mA field signals. IC Role / Device Role / Timing Role: Precision buffer, level translator, and active filter building block operating from 24 V single rail. Use Value: 32 V max supply rating accommodates industrial transients; output swing to 0.7 V above GND supports true-zero-input detection. |
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 rail-to-ground input. | Legacy industrial designs where power budget is unconstrained and input biasing is already implemented. | Select LM324DT only when backward compatibility with existing LM324 layouts is mandatory and micropower is not required. |
| TLV2464IDR | Lower 550 μA supply current; rail-to-rail I/O; 1.2 MHz GBW; higher cost. | Applications needing wider bandwidth or true rail-to-rail output swing, e.g., audio preamps or fast-settling data acquisition. | Choose TLV2464IDR when AC performance or output headroom exceeds LP324MT capabilities, accepting higher current draw. |
Compared with LM324DT, LP324MT cuts supply current by >94% while enabling ground-referenced inputs - critical for battery longevity and simplified sensor interfacing. Versus TLV2464IDR, LP324MT trades bandwidth and rail-to-rail output for ultra-low power and cost efficiency in DC-critical applications.
Availability
LP324MT is available at Aetrix Electronics and suitable for portable instrumentation, battery backup monitoring, and low-power sensor interface applications requiring stable component supply across production lifecycles.
Supply support for LP324MT 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 LP324MT belongs to TI's micropower operational amplifier product line, designed specifically for battery-operated and energy-sensitive systems where DC accuracy and ultra-low quiescent current are primary requirements.
FAQ
What is the maximum supply voltage for LP324MT?
The LP324MT supports a maximum supply voltage of 32 V (single supply) or ±16 V (dual supply). Absolute maximum ratings must not be exceeded during operation or transient events; sustained operation above 30 V requires thermal derating per θJA = 154°C/W for TSSOP package. Always verify voltage margins in LP324MT applications involving inductive loads or hot-swap conditions.
Does LP324MT support true ground-referenced input operation?
Yes, LP324MT features an input common-mode voltage range that includes ground (0 V), allowing direct connection of sensors referenced to system GND without external biasing networks. This capability is confirmed in the Electrical Characteristics table (VCM min = 0 V) and explicitly stated in the Applications Hints section of the LP324MT datasheet.
Is LP324MT pin-compatible with LM324?
Yes, LP324MT is pin-for-pin compatible with LM324 in TSSOP-14 (PW) package, as confirmed in the TI datasheet Feature list and Application Hints. This allows direct substitution in existing LM324 layouts to achieve >90% supply current reduction without PCB changes - provided thermal and bandwidth requirements remain within LP324MT specifications.
What is the typical input offset voltage of LP324MT?
The typical input offset voltage of LP324MT is 2 mV at TA = 25°C and V+ = 5 V, with a maximum of 9 mV over the full operating temperature range (0°C to +70°C). This value is specified in the Electrical Characteristics table under VOS parameter and applies to all four amplifiers within the LP324MT IC.
Can LP324MT drive capacitive loads without oscillation?
Yes, LP324MT is characterized for stable operation with capacitive loads from 50 pF to 1000 pF, as documented in the Application Hints section. No external isolation resistor is required for typical filter or ADC driver configurations, simplifying design and reducing component count in LP324MT-based signal chains.
LP324MT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for LP324MT through Aetrix?
Please submit a Request for Quotation (RFQ) for LP324MT 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 reliable?
The price and inventory of LP324MT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP324MT is usually 5 days.
3.What payment methods are accepted for LP324MT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP324MT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP324MT?
LP324MT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP324MT 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?
For technical support, including LP324MT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP324MT requirements.
6.How does Aetrix verify that LP324MT is sourced from the original manufacturer or authorized distributors?
All LP324MT 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 meets industry standards.
7.What is the process for return or replacement of LP324MT?
All LP324MT units undergo pre-shipment inspection (PSI). If there is an issue with LP324MT, 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 part is unused and in its original packaging.
Return procedure for LP324MT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP324MT Tags
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LM358DT
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LM324DR
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MCP6006UT-E/OT
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