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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments LPV324D

Name: LPV324D
Brand: Texas Instruments
SKU: LPV324D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LPV324D

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: LPV324D.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14SOIC

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Product details

Overview

LPV324D from Texas Instruments is a quad, rail-to-rail output, low-voltage (2.7 V to 5 V), low-power operational amplifier with 28 μA typical supply current per device (all four channels), 152 kHz gain-bandwidth product, and −40°C to 85°C operating temperature range. It delivers rail-to-rail output swing (V_CC+ − 3.5 mV / V_CC− + 90 mV at 100 kΩ) and supports general-purpose signal conditioning in battery-powered sensor interfaces and portable instrumentation.

For engineers reviewing the LPV324D datasheet, LPV324D pinout, LPV324D application, or LPV324D equivalent, key selection criteria include its ultra-low quiescent current, guaranteed rail-to-rail output performance at 2.7 V, input common-mode range extending to V_CC− − 0.2 V, stability with 1000 pF capacitive loads, and SOIC-14 packaging for legacy board compatibility.

Technical Context

The LPV324D implements a CMOS input stage with rail-to-rail output stage, enabling operation down to 2.7 V while maintaining usable output swing near both supply rails. Its internal biasing ensures no crossover distortion and stable unity-gain operation with capacitive loads up to 1000 pF - critical for driving ADC input buffers or RC-filtered outputs without phase margin degradation.

It features an input common-mode voltage range of −0.2 V to V_CC+ − 0.8 V and exhibits 50 dB minimum CMRR and PSRR across 2.7–5 V supply range. The device is characterized for −40°C to 85°C operation and meets JESD 78 Class II latch-up immunity (>100 mA) and JESD 22 ESD ratings (2 kV HBM, 200 V MM, 1 kV CDM).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 5 V - enables direct use with single-cell Li-ion (3.0–3.7 V) or two-cell alkaline (2.4–3.2 V) supplies without regulation.
Quiescent Current (All Channels)	28 μA typical at 5 V - allows continuous operation in always-on sensor nodes with multi-year battery life.
Gain-Bandwidth Product	152 kHz - sufficient for DC–10 kHz signal conditioning in precision thermistor, RTD, or bridge sensor amplifiers.
Rail-to-Rail Output Swing	V_CC+ − 3.5 mV / V_CC− + 90 mV at 100 kΩ - preserves full dynamic range when interfacing to 12-bit SAR ADCs with reference-based inputs.
Input Common-Mode Range	−0.2 V to V_CC+ − 0.8 V - supports ground-referenced single-ended inputs and level-shifting applications without external biasing.
Stability	Stable with 1000 pF capacitive load - eliminates need for isolation resistors when driving long traces or high-C ADC inputs.

Pinout & Package

LPV324D is supplied in a 14-pin SOIC (Package Drawing D), 3.90 mm × 8.65 mm body, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.

Pin/Terminal	Circuit Role	Design Meaning
1	Channel 1 Output	Amplified output of first op-amp; drives downstream stages or ADC inputs directly.
2	Channel 1 Inverting Input	Inverting node for configuring gain, filtering, or comparator hysteresis.
3	Channel 1 Non-Inverting Input	Non-inverting node for unity-gain buffers, sensor excitation, or reference monitoring.
4	V_CC− (Ground)	Power return for all four amplifiers; must be low-impedance connection to system ground plane.
5	Channel 2 Non-Inverting Input	Independent input for second op-amp; enables dual-sensor differential pairs or active filter sections.
6	Channel 2 Inverting Input	Configurable feedback node for channel 2; supports transimpedance or integrator topologies.
7	Channel 2 Output	Second independent output; usable for signal splitting, dual-path processing, or redundancy.
8	V_CC+	Positive supply rail for all amplifiers; requires local 100 nF ceramic decoupling adjacent to pin.
9	Channel 3 Output	Third output; supports multi-channel analog front-ends such as 3-phase motor current sensing.
10	Channel 3 Inverting Input	Inverting input for third op-amp; configurable as summing junction or error amplifier input.
11	Channel 3 Non-Inverting Input	Non-inverting input for third op-amp; used for reference voltage comparison or offset compensation.
12	Channel 4 Non-Inverting Input	Fourth independent non-inverting input; enables quad parallel signal paths or calibration channels.
13	Channel 4 Inverting Input	Fourth inverting input; supports programmable gain or adaptive filtering configurations.
14	Channel 4 Output	Final output; usable for system-level fault indication, watchdog signaling, or auxiliary reference generation.

Key Features

Feature	Design Value
Rail-to-rail output swing	Delivers >99% of full-scale output voltage headroom at 100 kΩ load - maximizes SNR in low-voltage ADC interfaces.
Ultra-low supply current	28 μA typical for all four channels at 5 V - reduces thermal load and extends battery runtime in portable medical devices.
Input common-mode range includes ground	Accepts signals down to −0.2 V relative to V_CC− - enables direct connection to grounded sensors without level-shifting circuitry.
Stable with 1000 pF capacitive load	Eliminates need for series output resistors when driving long PCB traces or high-input-capacitance ADCs - simplifies layout and improves transient response.
No crossover distortion	Ensures clean zero-crossing behavior in AC-coupled audio or precision waveform generation - avoids harmonic artifacts in sensor excitation signals.

Applications

Portable Gas Sensor Signal Conditioning	Low-Power Thermistor Interface
Use Scenario: Amplifying microamp-level current from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Quad LPV324D configures one channel as transimpedance amplifier, two as reference buffers, and one as comparator for threshold detection. Use Value: 28 μA total quiescent current enables >5-year operation on CR2032; rail-to-rail output ensures full utilization of 12-bit ADC range.	Use Scenario: Linearizing and amplifying resistance changes from NTC thermistors in wearable health monitors. IC Role / Device Role / Timing Role: One channel provides constant-current excitation, two implement precision difference amplification, and one performs cold-junction compensation. Use Value: Input common-mode range down to −0.2 V allows direct grounding of thermistor leg; low drift supports ±0.1°C accuracy over 0–50°C.
Industrial 4–20 mA Loop Receiver	Multi-Channel Data Acquisition Front-End
Use Scenario: Converting 4–20 mA loop current to ground-referenced voltage in battery-backed remote I/O modules. IC Role / Device Role / Timing Role: Single channel used as precision I-to-V converter with 250 Ω shunt; remaining channels buffer references and condition auxiliary signals. Use Value: Guaranteed operation at 2.7 V allows direct use with supercapacitor backup; rail-to-rail output maintains 0–5 V scaling across full current range.	Use Scenario: Simultaneous acquisition of four analog sensor outputs (e.g., pressure, humidity, acceleration, ambient light) in edge IoT gateways. IC Role / Device Role / Timing Role: Each channel independently conditions one sensor signal prior to multiplexed ADC sampling. Use Value: Quad integration reduces component count and board area; identical specs across channels ensure matched gain/offset for calibrated multi-sensor fusion.

Portable Gas Sensor Signal Conditioning

Low-Power Thermistor Interface

Use Scenario: Amplifying microamp-level current from electrochemical gas sensors powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Quad LPV324D configures one channel as transimpedance amplifier, two as reference buffers, and one as comparator for threshold detection.

Use Value: 28 μA total quiescent current enables >5-year operation on CR2032; rail-to-rail output ensures full utilization of 12-bit ADC range.

Use Scenario: Linearizing and amplifying resistance changes from NTC thermistors in wearable health monitors.

IC Role / Device Role / Timing Role: One channel provides constant-current excitation, two implement precision difference amplification, and one performs cold-junction compensation.

Use Value: Input common-mode range down to −0.2 V allows direct grounding of thermistor leg; low drift supports ±0.1°C accuracy over 0–50°C.

Industrial 4–20 mA Loop Receiver

Multi-Channel Data Acquisition Front-End

Use Scenario: Converting 4–20 mA loop current to ground-referenced voltage in battery-backed remote I/O modules.

IC Role / Device Role / Timing Role: Single channel used as precision I-to-V converter with 250 Ω shunt; remaining channels buffer references and condition auxiliary signals.

Use Value: Guaranteed operation at 2.7 V allows direct use with supercapacitor backup; rail-to-rail output maintains 0–5 V scaling across full current range.

Use Scenario: Simultaneous acquisition of four analog sensor outputs (e.g., pressure, humidity, acceleration, ambient light) in edge IoT gateways.

IC Role / Device Role / Timing Role: Each channel independently conditions one sensor signal prior to multiplexed ADC sampling.

Use Value: Quad integration reduces component count and board area; identical specs across channels ensure matched gain/offset for calibrated multi-sensor fusion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad low-voltage op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LMV324DR	Higher supply current (125 μA vs. 28 μA), wider GBW (1 MHz), same SOIC-14 package and pinout.	Preferred where higher speed or drive capability is needed; unsuitable for ultra-low-power designs.	Select LMV324DR only if bandwidth >200 kHz is required and power budget allows ≥4× higher ICC.
TLV2464CDR	Lower input offset (2 mV max vs. 10 mV max), higher drive strength (30 mA), but 125 μA ICC and narrower VICR (to V_CC− + 0.3 V).	Better for precision DC-coupled applications requiring <5 mV offset; not suitable for ground-sensing configurations.	Choose TLV2464CDR when offset-critical signal chains demand <3 mV VIO and output loading exceeds 10 kΩ.

Compared with LMV324DR and TLV2464CDR, the LPV324D uniquely balances sub-30 μA quiescent current, rail-to-rail output, ground-sensing input range, and SOIC-14 compatibility - making it optimal for cost-sensitive, battery-operated sensor nodes where power efficiency and design simplicity are prioritized over speed or ultra-low offset.

Availability

LPV324D is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and battery-powered data loggers requiring stable component supply and long-term manufacturability.

Supply support for LPV324D 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 digital signal technologies, with decades of expertise in precision op-amps and low-power signal chain solutions.

The LPV324D belongs to TI's LPV3xx family of ultra-low-power rail-to-rail op-amps, designed specifically for space-constrained, battery-operated applications where minimizing quiescent current without sacrificing basic precision and stability is essential.

FAQ

What is the maximum operating temperature range for the LPV324D?

The LPV324D is specified for operation from −40°C to +85°C. This range is confirmed in the "Recommended Operating Conditions" table of the official SLOS433I datasheet. While the LPV324I variant extends to 125°C, the standard LPV324D part (including LPV324D, LPV324DR, and LPV324DRG4) is rated only to 85°C ambient. Designers targeting extended temperature environments must select the 'I' suffix version.

Does the LPV324D support true rail-to-rail input operation?

No, the LPV324D does not support rail-to-rail input. Its input common-mode voltage range is specified as −0.2 V to V_CC+ − 0.8 V, meaning the inputs cannot safely reach either supply rail. However, the input range does extend 0.2 V below ground (V_CC−), enabling direct connection to grounded sensors - a key differentiator from many competing low-power op-amps. The output, however, is fully rail-to-rail.

Can the LPV324D drive a 1000-pF capacitive load without oscillation?

Yes, the LPV324D is explicitly characterized and guaranteed stable with a 1000-pF capacitive load, as stated in the "Features" section and verified in Figure 14 and Figure 15 of the SLOS433I datasheet. This stability holds across both 2.7 V and 5 V supply conditions and eliminates the need for external isolation resistors when interfacing to ADCs or long PCB traces - a critical advantage for compact, low-component-count designs.

What is the typical supply current for the LPV324D at 2.7 V?

At 2.7 V supply and 25°C, the typical supply current for the LPV324D (all four channels) is 16 μA, as shown in the "2.7-V Electrical Characteristics" table (page 5, ICC parameter). This value increases to 28 μA at 5 V, confirming its ultra-low-power profile across the full 2.7–5 V operating range - ideal for energy-harvesting or coin-cell-powered systems.

Is the LPV324D pin-compatible with other quad op-amps in SOIC-14 packages?

Yes, the LPV324D uses the industry-standard SOIC-14 pinout defined by TI for the LMV324/LPV324 family, matching pin-for-pin with LMV324D, TLC27L4, and TLV2464. This allows drop-in replacement in existing layouts where supply current and input/output voltage ranges are compatible. However, designers must verify that the alternative part's quiescent current, input offset, and stability characteristics meet system requirements before substitution.

LPV324D Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 0.1V/µs

Gain Bandwidth Product:: 237 kHz

-3db Bandwidth:: -

Current - Input Bias:: 2 nA

Voltage - Input Offset:: 1.5 mV

Current - Supply:: 28µA (x4 Channels)

Current - Output / Channel:: 72 mA

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 5 V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

LPV324D FAQ

1.How can I place an order for LPV324D through Aetrix?

Please submit a Request for Quotation (RFQ) for LPV324D 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 LPV324D reliable?

The price and inventory of LPV324D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV324D is usually 5 days.

3.What payment methods are accepted for LPV324D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV324D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LPV324D?

LPV324D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LPV324D 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 LPV324D?

For technical support, including LPV324D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV324D requirements.

6.How does Aetrix verify that LPV324D is sourced from the original manufacturer or authorized distributors?

All LPV324D 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 LPV324D meets industry standards.

7.What is the process for return or replacement of LPV324D?

All LPV324D units undergo pre-shipment inspection (PSI). If there is an issue with LPV324D, 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 LPV324D part is unused and in its original packaging.

Return procedure for LPV324D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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