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Texas Instruments LPV321M5
- Part No.:
- LPV321M5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LPV321M5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,233
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Product details
Overview
LPV321M5 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, −40°C to +85°C operating temperature range, and rail-to-rail output swing (V+ −3.5 mV / V− +90 mV at 100 kΩ load), enabling precision signal conditioning in portable medical sensors and wearable health monitors.
For engineers reviewing the LPV321M5 datasheet, LPV321M5 pinout, LPV321M5 application, or LPV321M5 equivalent, key selection considerations include its SC70-5 package footprint, bipolar input stage for low noise, guaranteed 2.7-V operation, input common-mode range extending to −0.2 V, and compatibility with single-supply systems requiring ground-sensing capability.
Technical Context
The LPV321M5 employs a bipolar input and output stage fabricated in Texas Instruments' submicron BiCMOS process, delivering improved noise performance (146 nV/√Hz at 1 kHz, 5 V) and higher output current drive versus CMOS alternatives. Its rail-to-rail output architecture supports full dynamic range utilization in low-voltage systems, while the input common-mode voltage range (−0.2 V to V+ −0.8 V) enables direct sensing near ground in single-supply configurations.
It operates stably under capacitive loads up to 200 pF in unity-gain configuration and exhibits no crossover distortion. The device is specified across industrial temperature range with 1.5 mV typical input offset voltage and 2 µV/°C drift, making it suitable for DC-coupled sensor front-ends where long-term accuracy and low power are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - Ensures reliable operation across full lithium-ion battery discharge curve (3.0 V–4.2 V) without brownout. |
| Supply Current (Typ) | 9 µA at 5 V - Enables multi-year battery life in always-on wearable sensors and IoT endpoint nodes. |
| Gain-Bandwidth Product | 152 kHz - Supports anti-aliasing filtering and low-frequency signal amplification up to ~10 kHz with adequate phase margin. |
| Rail-to-Rail Output Swing | V+ −3.5 mV / V− +90 mV at 100 kΩ - Maximizes usable output voltage range in 3.3-V systems, preserving ADC resolution. |
| Input Common-Mode Range | −0.2 V to V+ −0.8 V - Allows direct interfacing with grounded transducers (e.g., thermistors, bridge sensors) in single-supply designs. |
| Input Offset Voltage (Max) | 10 mV over −40°C to +85°C - Enables stable DC-coupled amplification without frequent calibration in industrial sensor modules. |
| ESD Rating (HBM) | ±1500 V - Provides robust handling during PCB assembly and field deployment in handheld devices. |
Pinout & Package
LPV321M5 is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm) surface-mount package - approximately half the area of SOT-23-5 - enabling ultra-compact layouts in space-constrained portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN+ | Noninverting input | Accepts high-impedance sensor signals; supports ground-referenced inputs down to −0.2 V. |
| 2: V− | Negative supply terminal | Connects to system ground in single-supply operation; must be decoupled with 0.1 µF ceramic capacitor. |
| 3: IN− | Inverting input | Used for feedback network connection; balanced resistor values minimize bias-current-induced offset. |
| 4: OUT | Amplifier output | Drives 100 kΩ loads with rail-to-rail swing; limited sourcing/sinking current (2–60 mA) constrains heavy capacitive loading. |
| 5: V+ | Positive supply terminal | Accepts 2.7–5 V; requires local 0.1 µF bypass capacitor to suppress supply noise and ensure stability. |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Enables clean, linear amplification of low-amplitude AC signals (e.g., ECG, audio preamp) without harmonic artifacts. |
| Micropower operation (9 µA) | Reduces quiescent power to <45 µW at 5 V, critical for energy-harvesting and coin-cell-powered edge nodes. |
| Rail-to-rail output swing | Delivers >99% of supply rail range at light loads, maximizing dynamic range for 10- to 12-bit ADC interfaces. |
| Bipolar input stage | Provides 1.7 nA typical input bias current and 178 nV/√Hz input voltage noise at 2.7 V - superior to CMOS op-amps in low-noise sensor apps. |
| Industrial temperature range | Validated operation from −40°C to +85°C ensures reliability in automotive cabin modules and outdoor IoT gateways. |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Amplifying low-level bio-potential signals (e.g., skin temperature, pulse oximetry photodiode current) in compact, battery-operated diagnostic patches. IC Role / Device Role / Timing Role: Single-supply, DC-coupled transimpedance and instrumentation amplifier front-end with ground-sensing capability. Use Value: 9 µA supply current extends battery life beyond 12 months; rail-to-rail output preserves full ADC input range despite 3.0-V supply sag. |
Use Scenario: Signal conditioning for motion and physiological sensors (accelerometer, galvanic skin response) in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Low-noise, micropower buffer and filter stage preceding MCU ADC sampling. Use Value: Bipolar input stage achieves 146 nV/√Hz noise floor at 1 kHz, enabling detection of sub-mV biometric variations without external amplification. |
| Smart Home Sensor Nodes | Industrial Battery-Powered Transmitters |
Use Scenario: Conditioning analog outputs from environmental sensors (CO₂, humidity, VOC) in Zigbee/Thread-enabled smart thermostats and air quality hubs. IC Role / Device Role / Timing Role: Rail-to-rail output driver for 0–3.3 V ratiometric sensor interfaces feeding into low-power microcontrollers. Use Value: Guaranteed 2.7-V operation maintains functionality as primary alkaline batteries discharge below 3.0 V, eliminating premature node failure. |
Use Scenario: Signal amplification and level-shifting in wireless pressure/temperature transmitters deployed in remote oil & gas monitoring wells. IC Role / Device Role / Timing Role: Precision, low-drift amplifier in 4–20 mA loop transmitter front-end with extended temperature tolerance. Use Value: 2 µV/°C input offset drift and −40°C to +85°C qualification ensure <0.1% FS error drift over full operating range without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail output operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | CMOS input (0.1 pA IB), lower supply current (900 nA), but 100 kHz GBWP and no guaranteed −40°C operation. | Better for ultra-low IB apps (high-Z pH sensors); unsuitable for wide-temp industrial use or bandwidth-sensitive filters. | Select MCP6001T-E/OT only when femtoampere input bias is mandatory and temperature range is limited to 0°C–70°C. |
| TSV611ICT | RRIO, 160 kHz GBWP, 12 µA supply current, AEC-Q100 qualified, but only specified down to −40°C with derated parameters. | Automotive-qualified alternative; higher supply current reduces battery life in portable devices. | Choose TSV611ICT for automotive cabin modules requiring AEC-Q100; avoid for consumer wearables due to 33% higher quiescent power. |
Compared with MCP6001T-E/OT and TSV611ICT, LPV321M5 uniquely balances micropower (9 µA), industrial temperature rating (−40°C to +85°C), and 152 kHz bandwidth in a 2.0 × 1.25 mm SC70 package - making it the optimal choice for cost-sensitive, space-constrained, battery-powered sensor nodes requiring guaranteed performance across full industrial range.
Availability
LPV321M5 is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, and smart home sensor nodes requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for LPV321M5 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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and signal chain solutions.
The LPV321M5 belongs to TI's LPV3xx-N micropower op-amp family, designed specifically for ultra-low-power, low-voltage signal conditioning in battery-powered portable electronics and industrial sensor interfaces.
FAQ
What is the maximum capacitive load the LPV321M5 can drive without oscillation?
The LPV321M5 is characterized to drive up to 200 pF in unity-gain follower configuration without instability. This applies to direct capacitive loading on the output pin. For loads exceeding 200 pF - such as LCD panel drivers or long PCB traces - external isolation resistors (e.g., 100 Ω–1 kΩ) or compensated feedback networks per Figure 37 in the LPV321-N datasheet are required to maintain phase margin. LPV321M5 does not integrate internal compensation for heavy capacitive loads.
Does the LPV321M5 support true rail-to-rail input operation?
No, the LPV321M5 features rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode voltage range is specified from −0.2 V to V+ −0.8 V, meaning it accepts inputs down to 0.2 V below ground (enabling ground-sensing) but cannot accept signals within 0.8 V of the positive rail. This differs from true RRIO op-amps like the TLV9001. LPV321M5's input stage is bipolar, optimizing noise and output drive rather than full input range.
What is the typical input bias current of the LPV321M5 and how does it affect circuit design?
The LPV321M5 has a typical input bias current of 1.7 nA at 2.7 V and 2 nA at 5 V, with a maximum of 50 nA over temperature. Because it uses a bipolar input stage, this bias current flows *into* both inputs. To minimize offset voltage errors, designers must balance source impedances at IN+ and IN− - for example, placing a resistor equal to the parallel combination of feedback and gain-setting resistors in the IN+ path. LPV321M5's bias current is significantly higher than CMOS op-amps but enables better noise and output drive performance.
Is the LPV321M5 pin-compatible with other members of the LPV3xx-N family?
No, the LPV321M5 (single-channel, SC70-5) is not pin-compatible with LPV358-N (dual, SOIC-8/VSSOP-8) or LPV324-N (quad, SOIC-14/TSSOP-14). While all share identical electrical specifications and functional behavior per channel, their pinouts and package footprints differ entirely. The LPV321M5's 5-pin SC70 layout (IN+, V−, IN−, OUT, V+) is unique to the single-channel variant and requires dedicated PCB layout - no shared land patterns exist across the LPV3xx-N family.
Can the LPV321M5 operate from a single 1.8-V supply?
No, the LPV321M5 is not specified or guaranteed for operation below 2.7 V. Its absolute maximum supply voltage is 5.5 V, and recommended operating conditions explicitly define 2.7 V to 5 V. Attempting to power LPV321M5 from 1.8 V will result in undefined behavior, including loss of rail-to-rail output swing, degraded GBWP (<50 kHz), increased input offset, and potential failure to amplify. For 1.8-V systems, consider TI's TLV8801 or Microchip's MCP6001, which are rated down to 1.4 V.
LPV321M5 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
LPV321M5 FAQ
1.How can I place an order for LPV321M5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321M5 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 LPV321M5 reliable?
The price and inventory of LPV321M5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321M5 is usually 5 days.
3.What payment methods are accepted for LPV321M5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321M5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321M5?
LPV321M5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321M5 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 LPV321M5?
For technical support, including LPV321M5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321M5 requirements.
6.How does Aetrix verify that LPV321M5 is sourced from the original manufacturer or authorized distributors?
All LPV321M5 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 LPV321M5 meets industry standards.
7.What is the process for return or replacement of LPV321M5?
All LPV321M5 units undergo pre-shipment inspection (PSI). If there is an issue with LPV321M5, 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 LPV321M5 part is unused and in its original packaging.
Return procedure for LPV321M5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPV321M5 Tags
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LM358DT
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LM358DR
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LM2904DR
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LM358ADR
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LM2904DGKR
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