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

Texas Instruments LPV321M5X

Name: LPV321M5X
Brand: Texas Instruments
SKU: LPV321M5X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LPV321M5X

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: LPV321M5X.pdf

Description:: IC OPAMP GP 1 CIRCUIT SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LPV321M5X from Texas Instruments is a single-channel, micropower, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5 V), battery-powered applications. It delivers 152 kHz gain-bandwidth product, 9 µA supply current at 5 V, and rail-to-rail output swing (V+ −3.5 mV / V− +90 mV at 100 kΩ load) while operating across −40°C to +85°C. It is used in portable sensor signal conditioning and low-power active filters.

For engineers reviewing the LPV321M5X datasheet, LPV321M5X pinout, LPV321M5X application, or LPV321M5X equivalent, key selection considerations include micropower operation under 10 µA, guaranteed rail-to-rail output performance at 2.7 V, input common-mode range extending to ground, SC70-5 package footprint constraints, and bipolar-input noise performance for precision DC-coupled sensing.

Technical Context

The LPV321M5X employs a bipolar input stage and BiCMOS output stage on Texas Instruments' submicron silicon-gate process, enabling low input bias current (1.7–50 nA), low input voltage noise (146 nV/√Hz at 5 V), and high output drive capability (20–60 mA sinking). Its architecture supports stable unity-gain operation with up to 200 pF capacitive load without external compensation.

It operates from single-supply (2.7 V to 5 V) or split-supply configurations, with input common-mode voltage range specified from −0.2 V to V+ − 0.8 V and rail-to-rail output swing validated at both 2.7 V and 5 V supply rails. The device exhibits no crossover distortion and maintains ≥50 dB CMRR over its full common-mode range.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 5 V - Enables direct interface with Li-ion, Li-polymer, and 3.3 V logic systems across full battery discharge curve.
Quiescent Current	9 µA at 5 V - Supports >1-year battery life in always-on sensor nodes powered by CR2032 coin cells.
Gain-Bandwidth Product	152 kHz - Sufficient for anti-aliasing, low-pass filtering, and DC-coupled amplification up to ~10 kHz with stable phase margin.
Rail-to-Rail Output Swing	V+ −3.5 mV / V− +90 mV at 100 kΩ - Maximizes dynamic range in 3.3 V or lower supply systems, preserving ADC resolution.
Input Common-Mode Range	−0.2 V to V+ − 0.8 V - Allows direct ground-referenced sensing (e.g., thermistor, bridge output) without level-shifting circuitry.
Input Offset Voltage	1.5 mV (max at 5 V, 25°C) - Suitable for <1% accuracy applications with gain ≤100; drift ≤2 µV/°C minimizes thermal error.
Slew Rate	0.1 V/µs - Adequate for step responses in slow-control loops and low-frequency instrumentation signals.

Pinout & Package

LPV321M5X is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm) surface-mount package - approximately half the area of standard SOT-23-5 - enabling ultra-compact PCB layouts in space-constrained portable electronics.

Pin/Terminal	Circuit Role	Design Meaning
1: IN+	Noninverting input	Accepts input signal referenced to ground or mid-supply; supports DC-coupled inputs down to −0.2 V.
2: V−	Negative power supply	Ground reference in single-supply operation; must be connected directly to PCB ground plane for stability.
3: IN−	Inverting input	Feedback node for closed-loop configurations; matched impedance required to minimize bias-current-induced offset.
4: OUT	Amplifier output	Delivers rail-to-rail voltage swing into ≥100 kΩ loads; capable of sourcing 2–16 mA and sinking 20–60 mA.
5: V+	Positive power supply	Primary supply rail (2.7–5 V); decoupling capacitor (0.1 µF ceramic) required within 2 mm of this pin.

Key Features

Feature	Design Value
Micropower operation	9 µA supply current at 5 V enables multi-year operation from coin-cell batteries in IoT endpoint sensors.
Rail-to-rail output	Output swings within 3.5 mV of V+ and 90 mV of V− at 100 kΩ load, maximizing usable voltage range in low-VDD systems.
Ground-sensing input	Input common-mode range includes −0.2 V, allowing direct connection to 0 V-referenced transducers without bias resistors.
No crossover distortion	Bipolar input stage eliminates crossover notch in Class-AB output stage, ensuring clean small-signal linearity near zero-crossings.
SC70-5 package	2.00 mm × 1.25 mm footprint saves >50% board area vs. SOT-23-5, critical for wearables and miniaturized medical devices.

Applications

Portable Sensor Signal Conditioning	Low-Power Active Filters
Use Scenario: Amplifying microvolt-level outputs from thermistors, RTDs, or MEMS pressure sensors in battery-powered health monitors. IC Role / Device Role / Timing Role: Single-supply, DC-coupled noninverting amplifier with gain = 100, configured for low-noise, low-drift signal acquisition. Use Value: 146 nV/√Hz input voltage noise and 2 µV/°C offset drift preserve measurement fidelity across temperature; 9 µA quiescent current extends wearable runtime.	Use Scenario: Implementing 2nd-order low-pass filtering (fc = 1.5 kHz) in wireless sensor node front-ends to suppress RF interference before ADC sampling. IC Role / Device Role / Timing Role: Unity-gain stable Sallen-Key topology op amp with 152 kHz GBWP and 0.1 V/µs slew rate. Use Value: Guaranteed stability with 200 pF capacitive load eliminates need for external isolation resistors; rail-to-rail output ensures full ADC input range utilization.
Single-Supply Battery Monitoring	Low-Voltage Reference Buffering
Use Scenario: Monitoring cell voltage in 1S Li-ion packs (2.7–4.2 V range) using resistive dividers followed by precision buffering. IC Role / Device Role / Timing Role: Rail-to-rail output voltage follower driving 100 kΩ ADC input with minimal loading error. Use Value: Input common-mode range down to −0.2 V accommodates divider output near ground; 1.5 mV max VOS limits voltage reading error to <0.04% at 4 V full scale.	Use Scenario: Isolating and buffering low-drift voltage references (e.g., TLV431, REF3025) in portable instrumentation with tight power budgets. IC Role / Device Role / Timing Role: High-impedance unity-gain buffer with low supply current and negligible output droop under load. Use Value: 20–60 mA sink capability drives reference bypass capacitors and ADC reference inputs without sag; 9 µA I_Q avoids degrading system efficiency.

Portable Sensor Signal Conditioning

Low-Power Active Filters

Use Scenario: Amplifying microvolt-level outputs from thermistors, RTDs, or MEMS pressure sensors in battery-powered health monitors.

IC Role / Device Role / Timing Role: Single-supply, DC-coupled noninverting amplifier with gain = 100, configured for low-noise, low-drift signal acquisition.

Use Value: 146 nV/√Hz input voltage noise and 2 µV/°C offset drift preserve measurement fidelity across temperature; 9 µA quiescent current extends wearable runtime.

Use Scenario: Implementing 2nd-order low-pass filtering (fc = 1.5 kHz) in wireless sensor node front-ends to suppress RF interference before ADC sampling.

IC Role / Device Role / Timing Role: Unity-gain stable Sallen-Key topology op amp with 152 kHz GBWP and 0.1 V/µs slew rate.

Use Value: Guaranteed stability with 200 pF capacitive load eliminates need for external isolation resistors; rail-to-rail output ensures full ADC input range utilization.

Single-Supply Battery Monitoring

Low-Voltage Reference Buffering

Use Scenario: Monitoring cell voltage in 1S Li-ion packs (2.7–4.2 V range) using resistive dividers followed by precision buffering.

IC Role / Device Role / Timing Role: Rail-to-rail output voltage follower driving 100 kΩ ADC input with minimal loading error.

Use Value: Input common-mode range down to −0.2 V accommodates divider output near ground; 1.5 mV max VOS limits voltage reading error to <0.04% at 4 V full scale.

Use Scenario: Isolating and buffering low-drift voltage references (e.g., TLV431, REF3025) in portable instrumentation with tight power budgets.

IC Role / Device Role / Timing Role: High-impedance unity-gain buffer with low supply current and negligible output droop under load.

Use Value: 20–60 mA sink capability drives reference bypass capacitors and ADC reference inputs without sag; 9 µA I_Q avoids degrading system efficiency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP6001T-E/OT	Higher supply current (100 µA), lower GBWP (1 MHz), CMOS input (pA-level I_B), no ground-sensing input (V_CM = V_SS + 0.3 V min)	Better for high-impedance source buffering; unsuitable for true ground-referenced inputs or ultra-low-power designs	Select when input bias current is critical and power budget allows >10× higher I_Q; avoid where V_CM must include 0 V.
TSV611ILT	Lower supply current (620 nA), lower GBWP (160 kHz), rail-to-rail I/O, but only specified down to 1.5 V supply	Superior for sub-2 V energy-harvesting systems; lacks 2.7 V/5 V performance validation and bipolar noise performance	Prefer for nano-power applications below 2 V; LPV321M5X remains optimal for 2.7–5 V industrial/portable designs requiring proven noise and drive specs.

Compared with MCP6001T-E/OT and TSV611ILT, LPV321M5X uniquely balances micropower (9 µA), rail-to-rail output, ground-sensing input, and 152 kHz bandwidth in a 2.0 × 1.25 mm SC70 package - making it the most suitable choice for cost-sensitive, space-constrained, battery-operated signal chains requiring DC precision and low-voltage robustness.

Availability

LPV321M5X is available at Aetrix Electronics and suitable for portable medical devices, battery-powered sensor nodes, and low-power industrial monitoring systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LPV321M5X 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 designing analog ICs, embedded processors, and digital signal solutions for industrial, automotive, and consumer markets since 1930.

The LPV321M5X belongs to TI's LPV3xx-N micropower op amp family, engineered specifically for cost-sensitive, space-constrained, low-voltage applications where battery life, PCB area, and ground-referenced signal integrity are primary design drivers.

FAQ

What supply voltage range is guaranteed for LPV321M5X operation?

LPV321M5X is fully specified and tested across 2.7 V to 5 V single-supply operation, with all key parameters - including gain-bandwidth product, input offset voltage, and rail-to-rail output swing - validated at both endpoints. Operation below 2.7 V is not characterized and may result in degraded performance or instability.

Does LPV321M5X support true ground-referenced input signals?

Yes. LPV321M5X features an input common-mode voltage range extending to −0.2 V (relative to V−), enabling direct connection of sensors or signal sources referenced to system ground in single-supply configurations - a key differentiator from many CMOS-input op amps that require ≥0.3 V headroom.

What is the maximum capacitive load LPV321M5X can drive without external compensation?

LPV321M5X is unity-gain stable and characterized to drive up to 200 pF directly at its output without oscillation or excessive peaking. For loads exceeding 200 pF, TI recommends adding a series isolation resistor (e.g., 10–100 Ω) between the LPV321M5X output and the capacitive load to maintain phase margin and pulse fidelity.

How does the SC70-5 package of LPV321M5X compare to SOT-23-5 in layout impact?

The SC70-5 package of LPV321M5X measures 2.00 mm × 1.25 mm - roughly 55% smaller than the 2.90 mm × 1.60 mm SOT-23-5 footprint. This reduction enables tighter placement near signal sources to minimize trace inductance and noise pickup, and supports higher-density routing in compact PCBs such as those used in hearing aids and smart patches.

Is LPV321M5X suitable for driving ADC reference inputs?

Yes. LPV321M5X provides rail-to-rail output swing, low output impedance (<1 Ω typical), and 20–60 mA sink capability - making it well-suited to buffer precision voltage references into ADC reference pins. Its 9 µA supply current avoids loading sensitive reference circuits, and its low noise preserves effective resolution in 12–16-bit converters.

LPV321M5X Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: Rail-to-Rail

Slew Rate:: 0.1V/µs

Gain Bandwidth Product:: 152 kHz

-3db Bandwidth:: -

Current - Input Bias:: 2 nA

Voltage - Input Offset:: 1.5 mV

Current - Supply:: 9µA

Current - Output / Channel:: 60 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:: SOT-23-5

LPV321M5X FAQ

1.How can I place an order for LPV321M5X through Aetrix?

Please submit a Request for Quotation (RFQ) for LPV321M5X 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 LPV321M5X reliable?

The price and inventory of LPV321M5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321M5X is usually 5 days.

3.What payment methods are accepted for LPV321M5X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321M5X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LPV321M5X?

LPV321M5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LPV321M5X 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 LPV321M5X?

For technical support, including LPV321M5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321M5X requirements.

6.How does Aetrix verify that LPV321M5X is sourced from the original manufacturer or authorized distributors?

All LPV321M5X 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 LPV321M5X meets industry standards.

7.What is the process for return or replacement of LPV321M5X?

All LPV321M5X units undergo pre-shipment inspection (PSI). If there is an issue with LPV321M5X, 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 LPV321M5X part is unused and in its original packaging.

Return procedure for LPV321M5X:

1.Submit a request within 90 days.

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

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