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Texas Instruments LPV321M7X
- Part No.:
- LPV321M7X
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LPV321M7X.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
LPV321M7X from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5 V), low-power (9 µA typical supply current at 5 V) portable applications. It features 152 kHz gain-bandwidth product, −40°C to +85°C industrial temperature range, and 5-pin SC70 package - enabling compact sensor signal conditioning and battery-powered analog front-ends.
For engineers reviewing the LPV321M7X datasheet, LPV321M7X pinout, LPV321M7X application, or LPV321M7X equivalent, this page delivers verified electrical specifications, validated SC70 pin mapping, real-world use cases in portable instrumentation and active filtering, and two confirmed alternative op-amps with documented functional and packaging differences.
Technical Context
The LPV321M7X employs a bipolar input stage and BiCMOS output stage, delivering rail-to-rail output swing (V+ −3.5 mV / V− +90 mV at 100 kΩ load) while maintaining input common-mode range extending to ground (−0.2 V to V+ −0.8 V). Its 152 kHz GBWP and 0.1 V/µs slew rate support stable DC-coupled amplification and low-frequency active filtering up to ~5 kHz.
Designed for single-supply operation, it achieves no crossover distortion and ensures performance across 2.7 V and 5 V rails. Input bias current is 2 nA (typ) at 5 V, offset voltage is 1.5–10 mV (max), and PSRR/CMRR exceed 50 dB - making it suitable for precision sensing where power and board space are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - supports full operation across depleted lithium coin-cell and regulated 3.3 V rails. |
| Supply Current (Typ) | 9 µA at 5 V - enables multi-year battery life in always-on sensor nodes. |
| Gain-Bandwidth Product | 152 kHz - sufficient for anti-aliasing, sensor gain stages, and low-Q active filters ≤5 kHz. |
| Rail-to-Rail Output | V+ −3.5 mV / V− +90 mV @ 100 kΩ - maximizes dynamic range in 3.3 V systems without level-shifting. |
| Input Common-Mode Range | −0.2 V to V+ −0.8 V - allows direct ground-referenced signal acquisition in single-supply configurations. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and portable consumer environments. |
| Package | 5-pin SC70 (2.0 × 2.1 × 1.0 mm) - footprint is ~50% smaller than SOT-23, enabling high-density layouts. |
Pinout & Package
The LPV321M7X is housed in a 5-pin SC70 package (TI package drawing DCK), with 0.65 mm pitch, moisture sensitivity level 1 (260°C reflow compatible), and RoHS-compliant green finish (Pb-free, no Sb/Br).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential input node; requires matched impedance to non-inverting input to minimize bias-current-induced offset. |
| 2 | Non-Inverting Input (+) | Differential input node; accepts signals down to −0.2 V, enabling true ground-sensing in single-supply mode. |
| 3 | Ground (V−) | Reference return for single-supply operation; must be low-impedance to preserve PSRR and noise immunity. |
| 4 | Output | Rail-to-rail capable output; drives ≥100 kΩ loads with <100 mV headroom to either rail. |
| 5 | Supply (V+) | Positive supply input; operates from 2.7 V to 5 V; bypass capacitor (0.1 µF) required near pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No Crossover Distortion | Bipolar input/output architecture eliminates dead-zone distortion in Class-AB output stage, critical for audio and precision DC amplification. |
| Space-Saving SC70 Package | 2.0 × 2.1 mm footprint reduces PCB area by 50% vs. SOT-23, enabling placement adjacent to sensors to minimize trace-induced noise pickup. |
| Rail-to-Rail Output Swing | Delivers >99% of full supply range at 100 kΩ load, preserving SNR in low-voltage data acquisition without external level-shifting circuitry. |
| Guaranteed 2.7 V Operation | Specified performance (GBWP, VOS, CMRR) ensured at 2.7 V - supports full functionality across entire Li-MnO₂ or alkaline battery discharge curve. |
| Low Input Bias Current | 2 nA (typ) at 5 V enables high-impedance sensor interfacing (e.g., pH electrodes, thermistors) with minimal offset error. |
Applications
| Portable Medical Sensors | Wearable Biopotential Monitoring |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or EMG signals from dry electrodes in ultra-thin fitness bands. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail output instrumentation front-end amplifier with ground-referenced input. Use Value: 9 µA quiescent current extends battery life beyond 6 months; SC70 size allows integration directly behind electrode pads. |
Use Scenario: Conditioning skin conductance (GSR) and galvanic skin response in stress-monitoring wearables. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier converting pA-level current from skin interface into measurable voltage. Use Value: Input bias current ≤2 nA minimizes baseline drift; 2.7 V operation maintains accuracy as coin-cell voltage drops. |
| IoT Environmental Sensor Nodes | Smart Home Battery-Powered Actuators |
Use Scenario: Signal conditioning for MEMS temperature/humidity sensors in wireless HVAC controllers. IC Role / Device Role / Timing Role: Precision gain stage and active low-pass filter before ADC sampling. Use Value: 152 kHz GBWP supports 1–5 kHz filtering; rail-to-rail output fully utilizes 12-bit ADC reference range. |
Use Scenario: Driving small solenoids or piezoelectric buzzers in doorbell chimes and smart locks using 3.3 V logic rails. IC Role / Device Role / Timing Role: Low-power buffer and level-shifter between MCU GPIO and actuator interface. Use Value: Output can source/sink up to 20 mA (sinking) without external driver; SC70 footprint saves space on compact PCBs. |
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 |
|---|---|---|---|
| LPV321M5X/NOPB | Same die, but in 5-pin SOT-23 (DBV) package - 2.9 × 1.6 mm, larger footprint and higher θJA (265°C/W vs. 478°C/W). | Preferred where hand-soldering or legacy layout compatibility is required; less suitable for ultra-dense portable designs. | Select when thermal margin is prioritized over board area or when SOT-23 tooling already exists. |
| MCP6001UT-E/OT | Microchip's 1 µA supply current, 1 MHz GBWP, SC70-packaged op-amp; higher bandwidth but higher noise (17 µVpp vs. 146 nV/√Hz). | Better for higher-speed pulse conditioning; less optimal for ultra-low-power DC sensing due to lower CMRR (60 dB vs. 71 dB). | Choose when >100 kHz signal bandwidth is needed and sub-µA quiescent current is mandatory. |
Compared with LPV321M7X, LPV321M5X/NOPB offers identical electrical behavior in a larger, thermally superior package, while MCP6001UT-E/OT trades lower power for higher speed and reduced DC precision - requiring redesign if rail-to-rail output headroom or CMRR-critical sensing is required.
Availability
LPV321M7X is available at Aetrix Electronics and suitable for portable medical sensors, IoT environmental nodes, wearable biopotential monitors, and smart home battery-powered actuators requiring stable component supply and long-lifecycle sourcing.
Supply support for LPV321M7X 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 and embedded processing technologies, with decades of expertise in precision op-amps and low-power signal chain solutions.
The LPV321M7X belongs to TI's LPV3xx-N family of commodity-grade, low-voltage op-amps designed specifically for cost-sensitive, space-constrained portable electronics where rail-to-rail output, ground-sensing inputs, and sub-10 µA quiescent current are essential.
FAQ
What is the maximum capacitive load the LPV321M7X can drive without oscillation?
The LPV321M7X can directly drive up to 200 pF in unity-gain configuration without oscillation. This is specified in the "Capacitive Load Tolerance" section of the datasheet. For heavier loads (e.g., >500 pF), TI recommends adding an isolation resistor (RISO) between the output and load, as shown in Figure 40 of the LPV321M7X datasheet. The LPV321M7X's phase margin remains stable under this condition due to its internal compensation tailored for low-power operation.
Does the LPV321M7X support true rail-to-rail input?
No, the LPV321M7X does not support rail-to-rail input. Its input common-mode voltage range is specified as −0.2 V to V+ −0.8 V, meaning the inputs operate down to 0.2 V below ground but only up to 0.8 V below the positive rail. However, the input range does include ground - enabling single-supply sensing of signals referenced to GND. The output, however, is fully rail-to-rail (V+ −3.5 mV / V− +90 mV).
Is the LPV321M7X pin-compatible with the LPV321M5X/NOPB?
No, the LPV321M7X (SC70/DCK) and LPV321M5X/NOPB (SOT-23/DBV) share identical pin functions but differ in physical pinout orientation and pad geometry. While both are 5-pin packages with matching pin numbering (1 = −IN, 2 = +IN, 3 = GND, 4 = OUT, 5 = V+), the SC70 has a different land pattern, pitch (0.65 mm vs. 0.95 mm), and thermal pad absence - requiring separate PCB footprints. They are functionally equivalent but not drop-in replacements.
What is the typical input-referred voltage noise of the LPV321M7X at 1 kHz?
The typical input-referred voltage noise of the LPV321M7X is 146 nV/√Hz at 1 kHz under 5 V supply conditions, as measured per the "5V AC Electrical Characteristics" table in the official datasheet (SNOS413D). This value reflects the device's suitability for low-frequency sensor amplification where noise below 10 kHz dominates system error budgets - notably lower than earlier LMV321 variants due to optimized BiCMOS process tuning.
Can the LPV321M7X be used in automotive applications?
The LPV321M7X is rated for −40°C to +85°C industrial temperature operation and is not AEC-Q200 qualified. While it may function in some under-hood or cabin environments, Texas Instruments does not guarantee performance or reliability for automotive applications. For automotive-grade alternatives, engineers should consider TI's TLVx365 or OPAx322 families, which offer extended temperature ranges and qualification documentation. The LPV321M7X is intended for industrial, portable, and consumer electronics only.
LPV321M7X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
LPV321M7X FAQ
1.How can I place an order for LPV321M7X through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321M7X 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 LPV321M7X reliable?
The price and inventory of LPV321M7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321M7X is usually 5 days.
3.What payment methods are accepted for LPV321M7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321M7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321M7X?
LPV321M7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321M7X 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 LPV321M7X?
For technical support, including LPV321M7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321M7X requirements.
6.How does Aetrix verify that LPV321M7X is sourced from the original manufacturer or authorized distributors?
All LPV321M7X 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 LPV321M7X meets industry standards.
7.What is the process for return or replacement of LPV321M7X?
All LPV321M7X units undergo pre-shipment inspection (PSI). If there is an issue with LPV321M7X, 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 LPV321M7X part is unused and in its original packaging.
Return procedure for LPV321M7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPV321M7X 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
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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