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Texas Instruments LMP2231BMF/NOPB
- Part No.:
- LMP2231BMF/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMP2231BMF/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,167
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Product details
Overview
LMP2231BMF/NOPB from Texas Instruments is a single micropower precision operational amplifier with CMOS inputs, designed for ultra-low-power sensor interface and instrumentation applications. It delivers 10 µA supply current, ±150 µV max input offset voltage, ±2.5 µV/°C max offset drift (B-grade), rail-to-rail output swing within 15 mV of rails, and operates from 1.6V to 5.5V - enabling high-accuracy signal conditioning in battery-powered medical devices and strain gauge bridges.
For engineers reviewing the LMP2231BMF/NOPB datasheet, LMP2231BMF/NOPB pinout, LMP2231BMF/NOPB application, or LMP2231BMF/NOPB equivalent, key selection considerations include its 20 fA input bias current, 130 kHz gain-bandwidth product at 5V, 60 nV/√Hz input voltage noise at 1 kHz, operation down to 1.6V supply, and guaranteed performance across –40°C to +125°C.
Technical Context
The LMP2231BMF/NOPB employs a CMOS input stage delivering femtoampere-level input bias current and high input impedance, making it suitable for interfacing with high-impedance sensors such as thermocouples and piezoresistive elements. Its precision architecture includes laser-trimmed input offset and low-drift design, ensuring long-term stability without external trimming.
It features rail-to-rail output capable of swinging within 15 mV of either supply rail under 10 kΩ load, and supports common-mode input voltage extending 200 mV below the negative rail - enabling true ground-sensing operation in single-supply systems. The device maintains 120 dB PSRR and 97 dB CMRR across its full 1.6V–5.5V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 10 µA typical - enables multi-year battery life in coin-cell-powered portable instruments. |
| Input Offset Voltage | ±150 µV maximum - ensures <0.015% error in 1V full-scale precision measurement circuits. |
| Offset Voltage Drift | ±2.5 µV/°C maximum (B-grade) - limits thermal-induced error to <0.3 mV over 125°C temperature span. |
| Input Bias Current | ±20 fA typical - prevents loading errors in >1 GΩ sensor sources like pH electrodes or photodiode transimpedance stages. |
| Gain-Bandwidth Product | 130 kHz at 5V - supports stable DC-coupled amplification up to ~10 kHz with unity-gain stability. |
| Output Swing | Rail-to-rail, within 15 mV of V+ or V− - maximizes dynamic range in low-voltage (e.g., 1.8V or 2.5V) data acquisition systems. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood sensor signal conditioning. |
Pinout & Package
Package: 5-Pin SOT-23 (DBV0005A). Compact footprint ideal for space-constrained portable and wearable electronics.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input - accepts 1.6V to 5.5V; decoupling capacitor required for stability. |
| 2 | VIN− | Inverting input - high-impedance CMOS node; sensitive to PCB leakage and ESD. |
| 3 | VIN+ | Non-inverting input - matched to VIN− for optimal common-mode rejection and offset performance. |
| 4 | V− | Negative supply / ground reference - supports true ground-sensing with –0.2V common-mode capability. |
| 5 | VOUT | Amplified output - rail-to-rail capable; drives ≥10 kΩ loads while maintaining specified AC performance. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 10 µA supply current enables >10-year operation on CR2032 battery in always-on sensor nodes. |
| Ultra-low input bias current | 20 fA typical eliminates input current-induced offset in high-Z transducer interfaces (e.g., strain gauges, thermopiles). |
| Precision offset and drift | ±150 µV max VOS and ±2.5 µV/°C max TCVOS ensure minimal calibration burden in field-deployed equipment. |
| Rail-to-rail output | Swings within 15 mV of supply rails at 10 kΩ load - preserves full ADC input range in low-voltage microcontroller systems. |
| Wide supply range | 1.6V to 5.5V operation supports direct integration with Li-ion, NiMH, and single-cell alkaline power sources. |
Applications
| Strain Gauge Bridge Amplifier | Portable ECG Front-End |
|---|---|
Use Scenario: Amplifying low-level differential signals (µV–mV) from full-bridge strain gauges in handheld torque meters or load cells. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core - configured in non-inverting or difference mode with matched external resistors. Use Value: 20 fA input bias avoids bridge imbalance errors; ±150 µV VOS minimizes zero-point drift during battery discharge. |
Use Scenario: Biopotential signal conditioning in battery-powered wearable ECG monitors with dry electrodes. IC Role / Device Role / Timing Role: First-stage low-noise, low-power amplifier - provides gain and DC blocking before ADC sampling. Use Value: 60 nV/√Hz input noise preserves QRS complex fidelity; 10 µA quiescent current extends runtime between charges. |
| Thermocouple Amplifier | Industrial Temperature Transmitter |
Use Scenario: Cold-junction compensation and amplification of Type-K/J thermocouple outputs in handheld calibrators. IC Role / Device Role / Timing Role: High-input-impedance buffer and gain stage - rejects thermocouple wire leakage and EMI. Use Value: CMOS inputs prevent thermocouple self-heating; –40°C to +125°C rating supports operation in uncontrolled environments. |
Use Scenario: Signal conditioning in 4–20 mA loop-powered temperature transmitters mounted near process equipment. IC Role / Device Role / Timing Role: Precision sensor interface amplifier - converts RTD or thermistor voltage to conditioned analog output. Use Value: 120 dB PSRR rejects supply ripple from loop power; 1.6V min supply allows operation during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Lower offset (10 µV max), higher supply current (17 µA), same 5-pin SOT-23 package. | Better DC accuracy but higher power - preferred where offset dominates error budget over battery life. | Select OPA333AIDBVR when sub-20 µV offset is mandatory and 7 µA extra current is acceptable. |
| MCP6V81T-E/OT | Zero-drift architecture, 2 µV max VOS, 65 µA supply current, same SOT-23-5 footprint. | Superior long-term drift stability but 6.5× higher current - suited for mains-powered lab equipment, not battery systems. | Choose MCP6V81T-E/OT only in AC-powered applications requiring <0.01 µV/°C drift and no micropower constraint. |
Compared with OPA333AIDBVR and MCP6V81T-E/OT, the LMP2231BMF/NOPB uniquely balances ultra-low power (10 µA), precision (±150 µV VOS), and wide supply range (1.6V–5.5V) - making it the optimal choice for portable, battery-constrained instrumentation where both accuracy and energy efficiency are critical.
Availability
LMP2231BMF/NOPB is available at Aetrix Electronics and suitable for precision instrumentation amplifiers, battery-powered medical instrumentation, and high-impedance sensor interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LMP2231BMF/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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain solutions.
The LMP2231BMF/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for micropower, high-accuracy sensor signal conditioning in portable and industrial measurement systems.
FAQ
What is the maximum operating supply voltage for the LMP2231BMF/NOPB?
The LMP2231BMF/NOPB has an absolute maximum supply voltage of 6V, but its specified operating range is 1.6V to 5.5V. Operation above 5.5V risks permanent damage, while operation below 1.6V may cause loss of rail-to-rail output swing and degraded CMRR. The LMP2231BMF/NOPB is fully characterized and guaranteed across the 1.6V–5.5V range, including at 1.8V and 2.5V for ultra-low-power designs.
Does the LMP2231BMF/NOPB support true ground-sensing input?
Yes, the LMP2231BMF/NOPB supports true ground-sensing: its common-mode input voltage range extends to –0.2V relative to V−, allowing it to accurately amplify signals referenced to system ground even when V− = 0V. This capability is confirmed across all supply voltages (1.6V–5.5V) and temperatures (–40°C to +125°C), making the LMP2231BMF/NOPB ideal for single-supply sensor front-ends where the negative input must handle 0V common-mode.
What is the guaranteed input offset voltage specification for the LMP2231BMF/NOPB?
The LMP2231BMF/NOPB is a B-grade device with a maximum input offset voltage of ±150 µV at TA = 25°C and V+ = 5V, as specified in the Electrical Characteristics table. This limit applies across the full operating temperature range (–40°C to +125°C) and supply range (1.6V–5.5V), with typical values around ±10 µV. The LMP2231BMF/NOPB does not carry the tighter ±50 µV A-grade specification - that applies only to the LMP2231AMF/NOPB variant.
Can the LMP2231BMF/NOPB drive capacitive loads?
The LMP2231BMF/NOPB is stable with capacitive loads up to 100 pF when driving a 10 kΩ load, as verified by phase margin measurements (≥70° at 100 pF, 5V supply). For loads >100 pF, external isolation resistance (e.g., 10–100 Ω in series with output) is recommended to maintain stability. The LMP2231BMF/NOPB's slew rate (58 V/ms) and GBW (130 kHz) remain usable under these conditions, but large capacitive loads may reduce effective bandwidth.
Is the LMP2231BMF/NOPB RoHS-compliant and lead-free?
Yes, the LMP2231BMF/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix in its part number (NOPB = No Lead, Pb-Free). It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is compatible with standard SnPb and lead-free reflow profiles. The device uses TI's green packaging technology and carries full compliance documentation per EU RoHS Directive 2011/65/EU and REACH SVHC requirements.
LMP2231BMF/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®, PowerWise®
- 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:
- 0.058V/µs
- Gain Bandwidth Product:
- 130 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.02 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 10µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMP2231BMF/NOPB FAQ
1.How can I place an order for LMP2231BMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2231BMF/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 LMP2231BMF/NOPB reliable?
The price and inventory of LMP2231BMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2231BMF/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2231BMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2231BMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2231BMF/NOPB?
LMP2231BMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2231BMF/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 LMP2231BMF/NOPB?
For technical support, including LMP2231BMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2231BMF/NOPB requirements.
6.How does Aetrix verify that LMP2231BMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2231BMF/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 LMP2231BMF/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2231BMF/NOPB?
All LMP2231BMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2231BMF/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 LMP2231BMF/NOPB part is unused and in its original packaging.
Return procedure for LMP2231BMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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