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Texas Instruments LPV321M5/NOPB
- Part No.:
- LPV321M5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LPV321M5/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,593
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Product details
Overview
LPV321M5/NOPB 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) with input common-mode range extending to ground. It is widely used in portable sensor signal conditioning and low-power active filters.
For engineers reviewing the LPV321M5/NOPB datasheet, LPV321M5/NOPB pinout, LPV321M5/NOPB application, or LPV321M5/NOPB equivalent, key selection considerations include micropower consumption, rail-to-rail output capability under 100 kΩ load, guaranteed 2.7-V operation, and SC70-5 package suitability for space-constrained PCB layouts.
Technical Context
The LPV321M5/NOPB employs a bipolar input and output stage fabricated on TI's submicron BiCMOS process, enabling improved noise performance (146 nV/√Hz at 1 kHz) and higher output current drive (±20 mA sinking/sourcing) compared to CMOS-only micropower op amps. Its architecture supports stable unity-gain operation with up to 200 pF capacitive load without external compensation.
It operates from a single 2.7–5 V supply or dual ±1.35 V to ±2.5 V supplies, with input common-mode voltage range specified from −0.2 V to V+ −0.8 V and guaranteed rail-to-rail output swing across temperature (−40°C to +85°C). The device exhibits no crossover distortion and maintains 50 dB minimum CMRR and PSRR over its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - ensures reliable operation across full lithium battery discharge curve (3.6 V → 2.7 V). |
| Supply Current (Typ) | 9 µA at 5 V - enables multi-year battery life in always-on sensor nodes and wearable devices. |
| Gain-Bandwidth Product | 152 kHz - supports low-frequency signal conditioning (e.g., thermistor, RTD, piezo sensors) with stable unity-gain response. |
| Rail-to-Rail Output Swing | V+ −3.5 mV / V− +90 mV at 100 kΩ - maximizes dynamic range in 3.3 V or lower systems, preserving ADC resolution. |
| Input Common-Mode Range | −0.2 V to V+ −0.8 V - allows direct sensing of signals referenced to ground in single-supply configurations. |
| Input Offset Voltage (Max) | 10 mV over −40°C to +85°C - suitable for precision DC-coupled amplification where <1% error is acceptable. |
| Slew Rate (Typ) | 0.1 V/µs - adequate for <1 kHz small-signal amplification and anti-aliasing filtering without distortion. |
Pinout & Package
LPV321M5/NOPB is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm), offering ~50% board area reduction versus SOT-23. This ultra-compact footprint enables placement adjacent to sensors or connectors to minimize parasitic pickup.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN+ | Noninverting input | Accepts high-impedance sensor or reference signals; common-mode range includes ground for single-supply use. |
| 2: V− | Negative supply terminal | Connects to GND in single-supply mode; supports dual-supply operation down to −2.5 V. |
| 3: IN− | Inverting input | Used for feedback network connection; bias current cancellation requires matched resistors at IN+ and IN−. |
| 4: OUT | Amplifier output | Drives loads ≥100 kΩ directly; rail-to-rail swing enables full utilization of 3.3 V ADC reference. |
| 5: V+ | Positive supply terminal | Accepts 2.7–5 V; internal regulation ensures consistent performance across battery voltage decay. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 9 µA supply current at 5 V enables >10-year battery life in coin-cell–powered IoT endpoints. |
| Rail-to-rail output | Delivers V+ −3.5 mV / V− +90 mV swing into 100 kΩ - preserves signal headroom in low-voltage systems. |
| Ground-sensing input | Input common-mode extends to −0.2 V - supports direct interfacing with 0 V-referenced transducers. |
| No crossover distortion | Bipolar input/output stage eliminates switching artifacts in audio and precision analog paths. |
| SC70-5 package | 2.00 mm × 1.25 mm footprint reduces PCB area by 50% vs SOT-23 - critical for wearables and miniaturized modules. |
Applications
| Portable Medical Sensors | Low-Power Active Filters |
|---|---|
|
Use Scenario: Amplifying weak DC-coupled signals from ECG electrodes or glucose biosensors in handheld diagnostic devices. IC Role / Device Role / Timing Role: Single-supply transducer signal conditioner with rail-to-rail output driving 12-bit SAR ADC input. Use Value: 9 µA quiescent current extends CR2032 battery life beyond 3 years; ground-sensing input eliminates level-shifting circuitry. |
Use Scenario: Implementing 2nd-order low-pass filtering before ADC sampling in battery-operated data loggers. IC Role / Device Role / Timing Role: Unity-gain buffer and integrator in Sallen-Key topology operating at ≤1 kHz corner frequency. Use Value: 152 kHz GBWP ensures ≥50× open-loop gain at 1 kHz; SC70-5 placement near sensor minimizes EMI pickup. |
| Wearable Motion Monitoring | Industrial Sensor Signal Conditioning |
|
Use Scenario: Conditioning output of MEMS accelerometers in smartwatches, requiring minimal board space and power. IC Role / Device Role / Timing Role: Low-noise (146 nV/√Hz), rail-to-rail output amplifier for AC-coupled motion signal chain. Use Value: 2.00 mm × 1.25 mm SC70-5 fits within tight mechanical envelopes; 200 pF capacitive load tolerance simplifies layout. |
Use Scenario: Amplifying 4–20 mA loop receiver outputs or RTD bridge signals in remote industrial nodes. IC Role / Device Role / Timing Role: Precision DC amplifier with 10 mV max offset and 50 dB CMRR for noisy factory environments. Use Value: −40°C to +85°C rating ensures reliability in uncontrolled enclosures; bipolar input improves ESD robustness. |
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 |
|---|---|---|---|
| TLV851DBVR | Lower supply current (420 nA), but reduced GBWP (5.5 kHz) and output drive (±2 mA). | Better for ultra-low-power wake-up circuits; unsuitable for >100 Hz signal conditioning or driving >10 kΩ loads. | Select TLV851DBVR only when microamp-level current is critical and bandwidth <10 kHz suffices. |
| MCP6001UT-E/OT | Higher supply current (100 µA), wider GBWP (1 MHz), and better offset (1.5 mV typ), but larger SOT-23-5 package. | Preferred for higher-speed sensor interfaces (e.g., ultrasonic pulse amplification); less optimal for coin-cell longevity. | Choose MCP6001UT-E/OT when 1 MHz bandwidth and sub-mV offset outweigh board space and power constraints. |
Compared with TLV851DBVR and MCP6001UT-E/OT, LPV321M5/NOPB uniquely balances 9 µA supply current, 152 kHz bandwidth, rail-to-rail output, and SC70-5 size - making it the optimal choice for cost-sensitive, space-constrained, battery-powered signal chains requiring moderate speed and precision.
Availability
LPV321M5/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, wearable motion monitoring, and low-power active filters requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LPV321M5/NOPB 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.
LPV321M5/NOPB belongs to TI's LPV3xx-N micropower op amp family, designed specifically for cost-sensitive, space-constrained, battery-powered applications demanding rail-to-rail output, ground-sensing inputs, and guaranteed 2.7-V operation.
FAQ
What is the maximum capacitive load the LPV321M5/NOPB can drive without oscillation?
The LPV321M5/NOPB is characterized to drive up to 200 pF in unity-gain configuration without external compensation. This applies to the standard SC70-5 package under recommended operating conditions (2.7–5 V supply, −40°C to +85°C). For loads exceeding 200 pF, TI recommends adding a series isolation resistor (RISO) between the output and capacitive load, as detailed in Figure 37 of the SNOS413E datasheet. The LPV321M5/NOPB's stability margin remains sufficient for typical sensor interface and filter applications without added components.
Does the LPV321M5/NOPB support true single-supply operation with input signals at ground potential?
Yes, the LPV321M5/NOPB supports true single-supply operation with input common-mode voltage ranging from −0.2 V to V+ −0.8 V. This means it accepts signals referenced directly to ground (0 V) when powered from a single positive supply (e.g., 3.3 V or 5 V), eliminating the need for level-shifting circuitry in sensor front-ends. The input stage includes protection diodes that tolerate brief excursions to −0.3 V, but sustained operation below −0.2 V requires external clamping per the datasheet guidelines.
What is the typical input-referred voltage noise of the LPV321M5/NOPB at 1 kHz?
The typical input-referred voltage noise of the LPV321M5/NOPB is 146 nV/√Hz at 1 kHz under 5 V supply conditions (TJ = 25°C). At 2.7 V supply, the value increases slightly to 178 nV/√Hz. This noise performance is competitive among micropower op amps and suitable for low-frequency sensor amplification where bandwidth is limited to <10 kHz. Noise density remains flat across the device's usable bandwidth, supporting predictable noise modeling in precision DC-coupled designs.
Can the LPV321M5/NOPB be used in dual-supply configurations?
Yes, the LPV321M5/NOPB is fully specified for dual-supply operation from ±1.35 V to ±2.5 V. Its input common-mode and output swing specifications apply symmetrically across both rails, and all key parameters-including GBWP, supply current, and offset voltage-are guaranteed over this range. Dual-supply use is common in legacy industrial signal chains or when interfacing with bipolar sensors. The device's bipolar input stage ensures consistent performance regardless of supply topology.
Is the LPV321M5/NOPB pin-compatible with other members of the LPV3xx-N family?
No, the LPV321M5/NOPB (single-channel, SC70-5) is not pin-compatible with LPV358-N (dual, SOIC-8/VSSOP-8) or LPV324-N (quad, SOIC-14/TSSOP-14). Each variant has distinct pin counts, functions, and package footprints. However, electrical characteristics-including supply current per channel, GBWP, and rail-to-rail output behavior-are closely aligned across the family, enabling scalable design reuse in multi-channel systems where board layout permits different packages.
LPV321M5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- 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/NOPB FAQ
1.How can I place an order for LPV321M5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321M5/NOPB 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/NOPB reliable?
The price and inventory of LPV321M5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321M5/NOPB is usually 5 days.
3.What payment methods are accepted for LPV321M5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321M5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321M5/NOPB?
LPV321M5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321M5/NOPB 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/NOPB?
For technical support, including LPV321M5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321M5/NOPB requirements.
6.How does Aetrix verify that LPV321M5/NOPB is sourced from the original manufacturer or authorized distributors?
All LPV321M5/NOPB 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/NOPB meets industry standards.
7.What is the process for return or replacement of LPV321M5/NOPB?
All LPV321M5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LPV321M5/NOPB, 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/NOPB part is unused and in its original packaging.
Return procedure for LPV321M5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPV321M5/NOPB Tags
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LM358DT
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LM358DR
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LM2904DR
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MCP6006UT-E/OT
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