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Texas Instruments LMP2231AMFX/NOPB
- Part No.:
- LMP2231AMFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMP2231AMFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,303
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Product details
Overview
LMP2231AMFX/NOPB from Texas Instruments is a single micropower precision operational amplifier with CMOS inputs, designed for ultra-low-power battery-operated systems. It delivers 10 µA supply current, ±150 µV max input offset voltage, ±0.4 µV/°C max offset drift (LMP2231A grade), and rail-to-rail output swing within 15 mV of either rail - enabling high-accuracy signal conditioning in medical sensors and strain gauge bridges.
For engineers reviewing the LMP2231AMFX/NOPB datasheet, LMP2231AMFX/NOPB pinout, LMP2231AMFX/NOPB application, or LMP2231AMFX/NOPB equivalent, key selection criteria include its 1.6V to 5.5V supply range, 20 fA input bias current, 130 kHz gain-bandwidth product, and operation across –40°C to 125°C - critical for portable instrumentation and industrial sensor front-ends.
Technical Context
The LMP2231AMFX/NOPB employs a CMOS input stage delivering femtoampere-level input bias current and high input impedance, essential for interfacing with high-impedance sources like thermocouples and piezoresistive sensors. Its precision architecture ensures low offset drift and high PSRR (120 dB) and CMRR (97 dB), maintaining accuracy under varying supply and common-mode conditions.
It features rail-to-rail output capability with 15 mV headroom at 10 kΩ load, supporting wide dynamic range in single-supply configurations. The device operates stably with capacitive loads up to 100 pF and maintains ≥70° phase margin across 1.8V–5.5V supplies, enabling robust performance in low-noise, low-power analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 10 µA typical - enables multi-year battery life in coin-cell-powered devices. |
| Input Offset Voltage | ±150 µV max - minimizes DC error in precision amplification without trimming. |
| Offset Voltage Drift | ±0.4 µV/°C max (LMP2231A) - ensures long-term stability over temperature in uncalibrated systems. |
| Input Bias Current | ±20 fA typical - preserves signal integrity when amplifying from >1 GΩ sensor sources. |
| Gain-Bandwidth Product | 130 kHz - supports stable DC-coupled amplification and low-frequency sensor signals (e.g., <100 Hz ECG, strain). |
| Common-Mode Range | Extends 200 mV below negative rail - allows ground-sensing in single-supply applications. |
| Output Swing | Rail-to-rail with ≤15 mV headroom at 10 kΩ - maximizes ADC utilization in 1.8V–5.5V systems. |
Pinout & Package
Package: 5-Pin SOT-23 (DBV0005A), surface-mount, footprint-compatible with industry-standard 5-pin op-amp layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplified output node; rail-to-rail capable, drives 10 kΩ minimum load. |
| 2 | IN− | Inverting input; high-impedance CMOS node, sensitive to PCB leakage and guarding. |
| 3 | V− | Negative supply terminal; supports operation down to 0 V (single-supply use). |
| 4 | IN+ | Non-inverting input; matched to IN− for optimal CMRR and offset performance. |
| 5 | V+ | Positive supply terminal; operates from 1.6V to 5.5V; PSRR = 120 dB. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 10 µA supply current enables >10-year battery life in 220 mAh coin cells at 1% duty cycle. |
| Ultra-low input bias current | 20 fA typical eliminates loading errors on high-Z sources (e.g., pH electrodes, photodiodes). |
| Precision DC performance | ±150 µV VOS and ±0.4 µV/°C TCVOS eliminate need for system-level calibration in medical-grade sensors. |
| Rail-to-rail output | Swings within 15 mV of V+ and V−, preserving full dynamic range for 12-bit+ ADCs in low-voltage systems. |
| Extended temperature range | Specified from –40°C to +125°C for reliable operation in automotive cabin and industrial field environments. |
Applications
| Precision Instrumentation Amplifiers | Battery Powered Medical Instrumentation |
|---|---|
Use Scenario: Low-noise, high-gain amplification of microvolt-level biopotential signals (e.g., ECG, EEG) in portable monitors. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in the first gain stage, rejecting electrode half-cell potentials via high CMRR. Use Value: 20 fA input bias current prevents baseline drift from electrode polarization; rail-to-rail output maximizes SNR into low-voltage ADCs. |
Use Scenario: Front-end amplification in handheld blood glucose meters and pulse oximeters powered by CR2032 batteries. IC Role / Device Role / Timing Role: Transimpedance and differential amplifier for photodiode and electrochemical sensor outputs. Use Value: 10 µA quiescent current extends battery life beyond 2 years; ±150 µV VOS ensures accurate glucose concentration calculation without factory trim. |
| High Impedance Sensors | Strain Gauge Bridge Amplifier |
Use Scenario: Signal conditioning for MEMS accelerometers and piezoelectric vibration sensors with >100 MΩ source impedance. IC Role / Device Role / Timing Role: Buffer and gain stage directly connected to sensor terminals to prevent charge leakage. Use Value: 20 fA input bias current avoids signal attenuation and time-constant errors; 1.6V min supply enables direct connection to energy-harvesting power rails. |
Use Scenario: Instrumentation amplifier front-end for quarter-bridge strain gauges in structural health monitoring nodes. IC Role / Device Role / Timing Role: Differential input stage converting bridge imbalance (µV–mV) into amplified, low-impedance output. Use Value: ±0.4 µV/°C TCVOS minimizes thermal drift-induced measurement error; 120 dB PSRR rejects supply noise from shared battery rails. |
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 typ), higher supply current (17 µA), same 5-pin SOT-23 package. | Better DC accuracy but reduced battery life in ultra-low-power designs. | Choose OPA333AIDBVR when VOS budget is tighter than current budget. |
| MAX40007AUT+T | Higher bandwidth (350 kHz), higher supply current (35 µA), 1.7V min supply, SC70-5 package. | Supports faster sensor sampling but consumes >3× more current; not drop-in due to different pinout. | Choose MAX40007AUT+T only when bandwidth >130 kHz is required and layout revision is acceptable. |
Compared with OPA333AIDBVR and MAX40007AUT+T, the LMP2231AMFX/NOPB uniquely balances sub-15 µA operation, <0.5 µV/°C drift, and 5-pin SOT-23 compatibility - making it optimal for cost-sensitive, long-life, precision sensor nodes where power is constrained but extreme accuracy is not mandatory.
Availability
LMP2231AMFX/NOPB is available at Aetrix Electronics and suitable for battery-powered medical instrumentation, precision instrumentation amplifiers, and high-impedance sensor interfaces requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LMP2231AMFX/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 LMP2231AMFX/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for micropower, high-accuracy applications in portable and industrial sensing systems where battery life and long-term stability are critical.
FAQ
What is the maximum operating supply voltage for the LMP2231AMFX/NOPB?
The LMP2231AMFX/NOPB has an absolute maximum supply voltage of 6 V, but its specified operating range is 1.6 V to 5.5 V. Operation above 5.5 V risks parametric degradation or permanent damage, even if within absolute ratings. For reliable long-term performance, design within the 1.6–5.5 V operating range per the datasheet.
Does the LMP2231AMFX/NOPB support rail-to-rail input common-mode range?
No - the LMP2231AMFX/NOPB supports a common-mode input voltage range extending 200 mV below the negative rail (down to V− − 0.2 V) but only up to V+ − 1.2 V at room temperature. It is rail-to-rail *output*, not rail-to-rail *input*. This makes it ideal for ground-sensing single-supply applications but unsuitable for full rail-to-rail input buffering.
What is the guaranteed input offset voltage specification for LMP2231AMFX/NOPB?
The LMP2231AMFX/NOPB is the 'A' grade variant, with a guaranteed maximum input offset voltage of ±150 µV over temperature (–40°C to +125°C). This is tighter than the 'B' grade (±250 µV max) and reflects tighter factory screening for precision applications like medical instrumentation.
Can the LMP2231AMFX/NOPB drive capacitive loads directly?
Yes - the LMP2231AMFX/NOPB is stable with capacitive loads up to 100 pF when driving a 10 kΩ resistive load, with ≥70° phase margin across its full supply range (1.8–5.5 V). For loads >100 pF, external isolation resistance (e.g., 10–100 Ω in series with output) is recommended to maintain stability.
Is the LMP2231AMFX/NOPB pin-compatible with other members of the LMP223x family?
Yes - the LMP2231AMFX/NOPB in 5-pin SOT-23 shares identical pinout with the dual LMP2232 and quad LMP2234 in their respective 8-pin SOIC/VSSOP and 14-pin SOIC/TSSOP packages *for the individual amplifier section*. However, pin mapping differs across package types; only same-package variants (e.g., LMP2231AMFX/NOPB vs. LMP2231BMFX/NOPB) are fully interchangeable.
LMP2231AMFX/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
LMP2231AMFX/NOPB FAQ
1.How can I place an order for LMP2231AMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2231AMFX/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 LMP2231AMFX/NOPB reliable?
The price and inventory of LMP2231AMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2231AMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2231AMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2231AMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2231AMFX/NOPB?
LMP2231AMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2231AMFX/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 LMP2231AMFX/NOPB?
For technical support, including LMP2231AMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2231AMFX/NOPB requirements.
6.How does Aetrix verify that LMP2231AMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2231AMFX/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 LMP2231AMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2231AMFX/NOPB?
All LMP2231AMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2231AMFX/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 LMP2231AMFX/NOPB part is unused and in its original packaging.
Return procedure for LMP2231AMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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