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Texas Instruments LPV321M7X/NOPB
- Part No.:
- LPV321M7X/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LPV321M7X/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,622
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Product details
Overview
LPV321M7X/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, −40°C to +85°C operating temperature, and rail-to-rail output swing within 3.5 mV of V+ and 90 mV of V− at 100 kΩ load - enabling precision signal conditioning in portable medical sensors and handheld instrumentation.
For engineers reviewing the LPV321M7X/NOPB datasheet, LPV321M7X/NOPB pinout, LPV321M7X/NOPB application, or LPV321M7X/NOPB equivalent, key selection criteria include micropower consumption (<10 µA), SC70-5 package footprint (2.00 mm × 1.25 mm), guaranteed rail-to-rail output performance across industrial temperature range, and bipolar input stage for improved noise and output drive capability.
Technical Context
The LPV321M7X/NOPB uses a bipolar input and output stage fabricated on TI's submicron BiCMOS process, delivering superior noise performance (146 nV/√Hz at 1 kHz) and higher output current drive (±20 mA sourcing/sinking) versus CMOS-only micropower op amps. Its input common-mode voltage range extends to −0.2 V (below ground) and up to V+ − 0.8 V, supporting true single-supply sensing near 0 V.
It achieves stable unity-gain operation with up to 200 pF capacitive load without external compensation, and features no crossover distortion due to its Class AB output stage - critical for low-distortion audio and sensor front-end buffering where signal fidelity must be preserved at ultra-low power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5 V - supports full operation across declining battery voltage in coin-cell or Li-ion systems |
| Supply Current (Typ) | 9 µA at 5 V - enables >1-year battery life in always-on wearable sensors drawing <10 µA system current |
| Gain-Bandwidth Product | 152 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., ECG, temperature, pressure) 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 |
| Input Offset Voltage (Max) | 10 mV over −40°C to +85°C - ensures <0.3% error in 3.3 V full-scale 12-bit ADC interfaces |
| Input Bias Current (Max) | 60 nA over temperature - allows use with high-impedance pH or photodiode sources without significant offset drift |
| Common-Mode Rejection | 50 dB minimum - adequate for non-critical industrial sensor amplification with moderate noise immunity |
Pinout & Package
LPV321M7X/NOPB is packaged in a 5-pin SC70 (DBV) case measuring 2.00 mm × 1.25 mm × 0.95 mm, offering ~50% board area reduction versus SOT-23-5 while maintaining identical pinout compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN+ | Noninverting input | Accepts input signals from 0 V to V+ − 0.8 V; supports ground-referenced single-supply operation |
| 2: V− | Negative supply | Connect to ground in single-supply mode; enables true 0 V input common-mode range |
| 3: IN− | Inverting input | Differential input node; matched impedance required to minimize bias-current-induced offset |
| 4: OUT | Amplifier output | Drives loads down to 100 kΩ with rail-to-rail swing; stable into 200 pF capacitive load |
| 5: V+ | Positive supply | Accepts 2.7–5 V; internal regulation ensures consistent performance across battery discharge curve |
Key Features
| Feature | Design Value |
|---|---|
| No Crossover Distortion | Class AB output stage eliminates notch distortion at zero-crossing - essential for clean AC signal amplification in audio and sensor buffers |
| Rail-to-Rail Output Swing | Delivers full 3.3 V output range from 0 V to 3.3 V supply - preserves SNR in low-voltage data acquisition chains |
| Bipolar Input Stage | Provides 1.5 nA typical input bias current and 146 nV/√Hz input voltage noise - superior to CMOS alternatives for medium-impedance sources |
| SC70-5 Package | 2.00 mm × 1.25 mm footprint enables placement within 2 mm of sensor elements - reducing PCB trace pickup and improving EMI immunity |
| Industrial Temperature Range | Specified from −40°C to +85°C - qualified for deployment in outdoor IoT nodes and automotive cabin electronics |
Applications
| Portable Medical Sensors | Low-Power Active Filters |
|---|---|
Use Scenario: Amplifying weak bio-potential signals (e.g., ECG, EMG) from dry electrodes in patch-style wearables. IC Role / Device Role / Timing Role: Single-supply transducer interface amplifier with rail-to-rail output driving 12-bit SAR ADC reference buffer. Use Value: 9 µA quiescent current extends battery life beyond 12 months; −0.2 V to V+−0.8 V input range enables direct ground-referenced electrode connection. | Use Scenario: Implementing 2nd-order low-pass filtering (fc = 1.5 kHz) before analog-to-digital conversion in environmental monitors. IC Role / Device Role / Timing Role: Unity-gain stable active filter stage using Sallen-Key topology with 152 kHz GBW headroom. Use Value: Guaranteed stability into 200 pF load eliminates need for external isolation resistors; 10 mV max VOS maintains <0.3% passband gain accuracy. |
| Handheld Test Equipment | Industrial Sensor Signal Conditioning |
Use Scenario: Front-end buffering and level-shifting of thermocouple or RTD signals in battery-operated multimeters. IC Role / Device Role / Timing Role: Precision difference amplifier with matched resistor network for cold-junction compensation. Use Value: 60 nA max input bias current minimizes error from high-value thermocouple series resistance; 50 dB CMRR rejects common-mode noise from switching power supplies. | Use Scenario: Amplifying 4–20 mA loop receiver outputs in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Low-power, rail-to-rail output driver converting current-loop voltage to ADC input range. Use Value: V+ −3.5 mV output high ensures full-scale utilization of 3.3 V ADC; −40°C to +85°C rating matches industrial ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | CMOS input (0.1 pA IB), 1 µA supply current, 1 MHz GBW - higher speed but higher power and poorer noise (30 µVpp) | Better for ultra-high-impedance pH sensors; unsuitable for low-noise 10 kHz sensor bandwidths | Select when input bias current <1 pA is mandatory and noise <100 nV/√Hz is not required |
| TSV611ICT | RRIO, 125 kHz GBW, 12 µA supply current, 100 nV/√Hz noise - slightly higher power, lower bandwidth, better noise than LPV321M7X/NOPB | Preferred for sub-10 kHz precision analog front-ends where noise dominates over power | Select when 100 nV/√Hz input noise is prioritized over 9 µA supply current |
Compared with MCP6001T-E/OT and TSV611ICT, LPV321M7X/NOPB offers the optimal balance of ultra-low supply current (9 µA), usable bandwidth (152 kHz), and bipolar-input noise performance (146 nV/√Hz) for general-purpose low-voltage sensor interfaces where both power and fidelity matter.
Availability
LPV321M7X/NOPB is available at Aetrix Electronics and suitable for portable medical devices, handheld test equipment, industrial sensor nodes, battery-powered IoT endpoints, and low-power active filter designs requiring stable component supply across multi-year production cycles.
Supply support for LPV321M7X/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 leader delivering analog and embedded processing solutions, with deep expertise in precision analog, low-power design, and high-volume manufacturing.
LPV321M7X/NOPB belongs to TI's LPV3xx-N micropower op amp family, engineered specifically for cost-sensitive, space-constrained, battery-operated systems requiring rail-to-rail output, ground-sensing inputs, and guaranteed 2.7 V/5 V performance.
FAQ
What is the maximum capacitive load LPV321M7X/NOPB can drive without oscillation?
The LPV321M7X/NOPB is unity-gain stable and can directly drive up to 200 pF capacitive load without external compensation or isolation resistors. This capability is verified per TI's datasheet Figure 22 and Section 7.4.1, making it suitable for driving ADC input capacitors or long PCB traces in compact layouts. Exceeding 200 pF requires resistive isolation (e.g., 10–100 Ω in series with output) to maintain phase margin.
Does LPV321M7X/NOPB support true single-supply operation with input signals at ground?
Yes, LPV321M7X/NOPB supports true single-supply operation with input common-mode voltage ranging from −0.2 V to V+ − 0.8 V. Its bipolar input stage allows the IN+ and IN− pins to accept signals at 0 V (ground) with full functionality, enabling direct interfacing with ground-referenced sensors like thermistors or bridge transducers without level-shifting circuitry.
What is the typical input voltage noise of LPV321M7X/NOPB at 1 kHz?
The typical input-referred voltage noise of LPV321M7X/NOPB is 146 nV/√Hz at 1 kHz under 5 V supply conditions (per Section 6.8 of SNOS413E). This value is confirmed in the datasheet's AC Electrical Characteristics table and reflects its bipolar input architecture - significantly lower than CMOS micropower op amps (e.g., MCP6001: ~300 nV/√Hz), making it suitable for medium-bandwidth sensor amplification.
Is LPV321M7X/NOPB pin-compatible with other packages of the same part number?
Yes, LPV321M7X/NOPB (SC70-5) shares identical pinout with the SOT-23-5 variant (LPV321DBVR), as confirmed in the Pin Functions table (Section 5) of SNOS413E. Both use the same 1:IN+, 2:V−, 3:IN−, 4:OUT, 5:V+ assignment. However, mechanical dimensions differ (SC70: 2.00 × 1.25 mm; SOT-23: 2.90 × 1.60 mm), requiring separate PCB footprints.
What is the output short-circuit current capability of LPV321M7X/NOPB?
LPV321M7X/NOPB provides ±20 mA output short-circuit current (sourcing) and ±60 mA (sinking) at 5 V supply, per Section 6.7 DC Electrical Characteristics. These values are specified over −40°C to +85°C and enable direct driving of small LEDs, MOSFET gates, or low-power comparators without external buffers - critical for space-constrained portable designs.
LPV321M7X/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
LPV321M7X/NOPB FAQ
1.How can I place an order for LPV321M7X/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LPV321M7X/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 LPV321M7X/NOPB reliable?
The price and inventory of LPV321M7X/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPV321M7X/NOPB is usually 5 days.
3.What payment methods are accepted for LPV321M7X/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPV321M7X/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPV321M7X/NOPB?
LPV321M7X/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPV321M7X/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 LPV321M7X/NOPB?
For technical support, including LPV321M7X/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPV321M7X/NOPB requirements.
6.How does Aetrix verify that LPV321M7X/NOPB is sourced from the original manufacturer or authorized distributors?
All LPV321M7X/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 LPV321M7X/NOPB meets industry standards.
7.What is the process for return or replacement of LPV321M7X/NOPB?
All LPV321M7X/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LPV321M7X/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 LPV321M7X/NOPB part is unused and in its original packaging.
Return procedure for LPV321M7X/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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