My Inquiry
My Account
Texas Instruments LP324DR
- Part No.:
- LP324DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP324DR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,106
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP324DR from Texas Instruments is a quadruple ultra-low-power operational amplifier optimized for battery-operated systems, featuring 85 μA typical supply current, 2 mV typical input offset voltage, and rail-to-rail input common-mode range including ground. It operates from 3 V to 32 V single supply and is widely used in portable instrumentation and LCD display biasing circuits.
For engineers reviewing the LP324DR datasheet, LP324DR pinout, LP324DR application, or LP324DR equivalent, key selection criteria include supply current vs. precision trade-offs, single-supply input stage compatibility, temperature range (0°C to 70°C), SOIC-14 package constraints, and functional alignment with LM324-based legacy designs.
Technical Context
The LP324DR implements four independent high-input-impedance op-amps in a single monolithic IC, each with bipolar input stage enabling 2 nA typical input bias current and ground-sensing capability. Its architecture prioritizes low quiescent power over bandwidth-gain-bandwidth product is 100 kHz at ±15 V-making it unsuitable for high-speed signal conditioning but ideal for DC-coupled sensor buffering and slow-settling feedback loops.
It supports single-supply operation via input common-mode range extending to VCC– (ground), output swing within 1.9 V of rails under load, and robust ESD protection (±350 V HBM). Thermal resistance is 140 °C/W (SOIC-14), limiting continuous dissipation to ~215 mW at 70°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 85 μA typical per amplifier - enables multi-year battery life in always-on sensor nodes |
| Input Offset Voltage | 2 mV typical - supports accurate DC amplification without frequent nulling in metering front-ends |
| Input Bias Current | 2 nA typical - minimizes voltage error across high-impedance sources like thermistors or photodiodes |
| Supply Voltage Range | 3 V to 32 V single supply - accommodates wide input rails from coin cells to industrial 24 V systems |
| Input Common-Mode Range | Includes ground (VCC–) - allows direct interfacing with 0 V-referenced sensors and DAC outputs |
| Output Voltage Swing | (VCC) – 1.9 V min - delivers usable dynamic range near positive rail in single-supply configurations |
| Gain Bandwidth Product | 100 kHz - sufficient for anti-aliasing filters, level-shifting, and slow-loop control, not audio or fast ADC drivers |
Pinout & Package
LP324DR is housed in a 14-pin SOIC (D) package, 3.90 mm wide, 8.65 mm long, 1.75 mm max height, with 1.27 mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot; device orientation follows JEDEC MS-012 AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1IN–, 2IN–, 3IN–, 4IN– | Inverting input | Negative differential input node for each of four independent amplifiers |
| 1IN+, 2IN+, 3IN+, 4IN+ | Non-inverting input | Positive differential input node; accepts signals down to ground in single-supply mode |
| 1OUT, 2OUT, 3OUT, 4OUT | Output | Amplified output capable of sourcing/sinking ≥4 mA into resistive loads |
| VCC+ | Positive supply | Highest potential rail; must be ≥3 V above VCC– for operation |
| VCC– | Negative supply / ground | Lowest potential rail; tied to system ground in single-supply applications |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 85 μA per amplifier enables >10-year operation on CR2032 in intermittent-sense applications |
| Ground-sensing input stage | Input common-mode range includes VCC–, eliminating need for level-shifting in 0–V referenced sensor interfaces |
| Wide single-supply voltage range | 3 V to 32 V operation supports both low-voltage wearables and industrial 24 V systems without redesign |
| LM324 pin compatibility | Direct drop-in replacement for legacy LM324 designs, preserving PCB layout and bill-of-materials continuity |
| Robust ESD tolerance | ±350 V HBM rating reduces risk of field failure during handling and assembly in non-ESD-controlled environments |
Applications
| Portable Instrumentation | LCD Display Biasing |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring DC voltage, current, and resistance with auto-ranging. IC Role / Device Role / Timing Role: LP324DR buffers high-impedance input dividers, drives analog switches, and conditions transducer outputs in the front-end signal chain. Use Value: 85 μA supply current extends battery life beyond 2 years; ground-sensing inputs simplify reference design for zero-V input ranges. | Use Scenario: Monochrome STN LCD module in industrial HMI panel requiring stable VOFF, VON, and VCOM bias voltages. IC Role / Device Role / Timing Role: LP324DR generates and regulates three precision bias rails using resistor-divider feedback networks. Use Value: Low input bias current prevents divider loading errors; 2 mV offset ensures consistent contrast across temperature (0°C–70°C). |
| Consumer Audio Accessories | Industrial Power Supply Monitoring |
Use Scenario: Volume control and headphone driver stage in compact Bluetooth speaker with integrated Li-ion battery management. IC Role / Device Role / Timing Role: LP324DR serves as DC-coupled line-level amplifier and mute/enable logic interface between codec and Class-D amplifier input. Use Value: Single-supply operation eliminates negative rail generation; rail-compatible inputs accept 0–V digital audio references directly. | Use Scenario: Real-time monitoring of 24 V DC bus voltage, current shunt sense, and thermal foldback thresholds in DIN-rail mounted PSU. IC Role / Device Role / Timing Role: LP324DR compares sensed values against precision references and drives optocoupler inputs for isolation-coupled feedback. Use Value: 32 V absolute max supply withstands transient surges; 75 dB CMRR rejects common-mode noise on noisy industrial bus lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Higher supply current (1.2 mA typical), wider temp range (−40°C to +85°C), no guaranteed ground-sensing input | Better suited for mains-powered equipment where power efficiency is secondary to speed and temperature margin | Select LM324DR only when higher GBW (1.2 MHz) or extended temperature operation is required |
| LP2902DR | Identical electrical specs but rated for −40°C to +85°C; same SOIC-14 package and pinout | Drop-in replacement for LP324DR in automotive or outdoor deployments requiring wider ambient operating range | Choose LP2902DR when full industrial temperature compliance is mandatory and board space/layout cannot change |
Compared with LM324DR, LP324DR reduces supply current by >90% at the cost of bandwidth and temperature range; compared with LP2902DR, it shares identical performance but trades −40°C capability for lower cost in commercial-grade applications.
Availability
LP324DR is available at Aetrix Electronics and suitable for portable instrumentation, LCD display biasing, consumer audio accessories, and industrial power supply monitoring requiring stable component supply across production lifecycles.
Supply support for LP324DR 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 decades of op-amp innovation and broad industrial qualification.
The LP324DR belongs to TI's low-power precision op-amp family, designed specifically for energy-constrained, battery-operated systems where microamp-level quiescent current and ground-referenced input operation are critical.
FAQ
What is the operating temperature range for LP324DR?
The LP324DR is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with indoor consumer and office equipment use cases. For extended-temperature applications such as automotive or outdoor industrial gear, consider the LP2902DR variant, which supports −40°C to +85°C while maintaining identical electrical performance and SOIC-14 pinout.
Is LP324DR pin-compatible with LM324?
Yes, LP324DR is fully pin-compatible with LM324 in SOIC-14 packaging. All 14 pins-including VCC+, VCC–, four sets of IN+/IN–/OUT, and pin 1 location-match exactly. This allows direct substitution in existing LM324 layouts without PCB modification, though designers must verify that reduced bandwidth (100 kHz vs. 1.2 MHz) and lower supply current meet system requirements.
Does LP324DR support true single-supply operation with inputs at ground?
Yes, LP324DR supports true single-supply operation with input common-mode voltage extending to VCC– (ground). This enables direct connection of 0 V-referenced sensors, DAC outputs, or microcontroller GPIOs without external level-shifting circuitry-unlike many older op-amps that require a minimum input voltage above ground.
What is the maximum output current capability of LP324DR?
LP324DR can source up to 10 mA and sink up to 5 mA per amplifier under typical conditions (TA = 25°C, VCC = 5 V). At temperature extremes (0°C to 70°C), minimum guaranteed sink current drops to 3 mA and source current to 4 mA. These values assume resistive loads; capacitive loads may reduce effective drive strength due to slew-rate limitations.
Can LP324DR be used in dual-supply configurations?
Yes, LP324DR supports dual-supply operation with ±15 V (±16 V absolute max), as confirmed in its Absolute Maximum Ratings table. In dual-supply mode, VCC+ connects to +VS and VCC– connects to –VS. Input common-mode range remains symmetric about midsupply, and output swing extends within 1.9 V of each rail-enabling conventional split-rail signal conditioning where needed.
LP324DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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 (x4 Channels)
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LP324DR FAQ
1.How can I place an order for LP324DR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP324DR 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 LP324DR reliable?
The price and inventory of LP324DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP324DR is usually 5 days.
3.What payment methods are accepted for LP324DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP324DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP324DR?
LP324DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP324DR 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 LP324DR?
For technical support, including LP324DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP324DR requirements.
6.How does Aetrix verify that LP324DR is sourced from the original manufacturer or authorized distributors?
All LP324DR 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 LP324DR meets industry standards.
7.What is the process for return or replacement of LP324DR?
All LP324DR units undergo pre-shipment inspection (PSI). If there is an issue with LP324DR, 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 LP324DR part is unused and in its original packaging.
Return procedure for LP324DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP324DR 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
