My Inquiry
My Account
Texas Instruments LMP2231AMFE/NOPB
- Part No.:
- LMP2231AMFE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMP2231AMFE/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMP2231AMFE/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, ±0.4 µV/°C max offset drift (LMP2231A 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 LMP2231AMFE/NOPB datasheet, LMP2231AMFE/NOPB pinout, LMP2231AMFE/NOPB application, or LMP2231AMFE/NOPB equivalent, key selection criteria include guaranteed low TCVOS (±0.4 µV/°C max), 20 fA input bias current, 130 kHz gain-bandwidth product at 5V, 60 nV/√Hz input voltage noise at 1 kHz, and operation across –40°C to 125°C industrial temperature range.
Technical Context
The LMP2231AMFE/NOPB uses a CMOS input stage to achieve femtoampere-level input bias current and high input impedance, making it suitable for interfacing with high-impedance sensors like thermocouples and piezoresistive elements. Its precision architecture includes laser-trimmed input offset and drift compensation, ensuring stability over temperature and supply voltage variations from 1.6V to 5.5V.
This device features rail-to-rail output with 17–50 mV swing from either rail (depending on load and supply), common-mode input range extending 200 mV below negative rail, and robust PSRR (120 dB) and CMRR (97 dB) - enabling reliable performance in noisy single-supply systems where ground-referenced sensing is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 10 µA typical - enables >1-year battery life in coin-cell-powered portable instruments. |
| Input Offset Voltage | ±150 µV max - ensures <0.003% gain error in 100-mV full-scale bridge amplifier designs. |
| TCVOS (LMP2231A) | ±0.4 µV/°C max - limits offset drift to <0.5 µV over 0–70°C ambient, critical for uncalibrated medical sensors. |
| Input Bias Current | ±20 fA typical - prevents loading errors in >1 GΩ source impedances (e.g., pH electrodes, photodiode transimpedance). |
| Gain-Bandwidth Product | 130 kHz at 5V - supports stable DC-coupled amplification up to ~10 kHz with unity-gain stability into 20 pF. |
| Output Swing | Rail-to-rail, within 17 mV of V+ or V− (RL = 10 kΩ) - maximizes dynamic range in 1.8V–3.3V microcontroller ADC interfaces. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin and industrial control environments without derating. |
Pinout & Package
Package: 5-Pin SOT-23 (DBV0005A), surface-mount, moisture-sensitive level 1 (MSL-1), footprint compatible with industry-standard 5-pin op-amp layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input - accepts 1.6V to 5.5V; decoupling capacitor required within 1 cm for stability. |
| 2 | VIN− | Inverting input - high-impedance CMOS node; sensitive to PCB leakage and ESD; guard ring recommended. |
| 3 | VIN+ | Non-inverting input - matched to VIN− for optimal CMRR; routing symmetry critical in precision layouts. |
| 4 | V− | Negative supply / ground reference - extends 200 mV below this rail for true ground-sensing capability. |
| 5 | VOUT | Amplified output - drives 10 kΩ loads to rail; limited sourcing/sinking current (≤30 mA) constrains heavy capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 10 µA supply current enables multi-year operation on CR2032 batteries in wireless sensor nodes. |
| Precision offset & drift | ±150 µV max VOS and ±0.4 µV/°C max TCVOS (A-grade) eliminate need for system-level calibration in Class II medical devices. |
| Ultra-low input bias | 20 fA typical IB allows direct connection to >10 GΩ resistive sensors without signal attenuation. |
| Rail-to-rail output | Swings within 17 mV of V+ or V− at 10 kΩ load - preserves >99% of ADC full-scale range in 3.3V systems. |
| Wide supply range | 1.6V to 5.5V operation supports direct integration with Li-ion, alkaline, and energy-harvesting power sources. |
Applications
| Strain Gauge Bridge Amplifier | Thermocouple Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level differential signals (<10 mV) from quarter-bridge strain gauges in structural health monitoring sensors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with fixed-gain configuration and offset nulling. Use Value: 0.4 µV/°C drift ensures <1 LSB error over temperature in 16-bit ADC systems without recalibration. |
Use Scenario: Cold-junction compensation and linearization of Type-K thermocouple outputs in portable environmental monitors. IC Role / Device Role / Timing Role: High-impedance buffer and cold-junction reference amplifier feeding a delta-sigma ADC. Use Value: 20 fA input bias prevents thermocouple wire leakage errors; rail-to-rail output matches 0–3.3V ADC input range. |
| Battery-Powered ECG Front-End | High-Impedance pH Electrode Interface |
Use Scenario: Amplifying microvolt-level biopotential signals from dry-electrode ECG patches in wearable health trackers. IC Role / Device Role / Timing Role: Ultra-low-noise, low-drift first-stage amplifier with active filtering and gain setting. Use Value: 60 nV/√Hz input voltage noise and 130 kHz GBW support clean 0.05–150 Hz bandwidth without excessive power draw. |
Use Scenario: Buffering high-impedance (>1 GΩ) glass pH electrode outputs in handheld water quality testers. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating electrode from ADC input capacitance and leakage paths. Use Value: 20 fA input bias avoids pH reading drift caused by electrode polarization; 1.6V min supply enables direct use with single LiFePO₄ cell. |
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 VOS (10 µV typ), higher supply current (17 µA), same 5-pin SOT-23 package. | Better DC accuracy but higher power - preferred for static sensor measurement, not ultra-long-life battery apps. | Select when offset-limited resolution dominates over battery life; verify layout compatibility with OPA333's internal EMI filter. |
| MAX44260ASA+ | Higher GBW (500 kHz), higher supply current (35 µA), 8-pin SOIC only - no 5-pin SOT-23 option. | Supports faster settling and AC-coupled designs, but incompatible footprint and higher quiescent power. | Choose when bandwidth >200 kHz is required and board space allows SOIC; not drop-in for LMP2231AMFE/NOPB layouts. |
Compared with OPA333AIDBVR and MAX44260ASA+, the LMP2231AMFE/NOPB uniquely balances sub-15-µA supply current, <0.5 µV/°C drift, and 5-pin SOT-23 packaging - making it the only option for compact, multi-year-life, high-precision analog front-ends in constrained IoT sensor nodes.
Availability
LMP2231AMFE/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 long production lifecycles.
Supply support for LMP2231AMFE/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 LMP™ precision amplifier family, including the LMP2231AMFE/NOPB, was engineered specifically for ultra-low-power, high-accuracy sensor signal conditioning in portable and industrial instrumentation - prioritizing offset stability, input impedance, and supply flexibility over raw speed.
FAQ
What is the maximum guaranteed input offset voltage for LMP2231AMFE/NOPB?
The LMP2231AMFE/NOPB has a maximum input offset voltage of ±150 µV across the full operating temperature range (–40°C to +125°C), as specified in the Electrical Characteristics table under "5V DC Electrical Characteristics" for the LMP2231A grade. This value is tested and ensured, not typical, and applies at both extremes of temperature and supply voltage (1.6V–5.5V).
Does LMP2231AMFE/NOPB support rail-to-rail input common-mode range?
No, the LMP2231AMFE/NOPB does not support rail-to-rail input. Its common-mode input voltage range extends 200 mV below the negative supply (V−) and up to (V+ − 0.2 V) - for example, with V+ = 3.3V and V− = 0V, the usable input range is –0.2 V to +3.1 V. This enables true ground-sensing but excludes direct connection to V+.
Can LMP2231AMFE/NOPB drive capacitive loads directly?
The LMP2231AMFE/NOPB is stable with capacitive loads ≤20 pF when driving a 10 kΩ load, as verified in the AC Electrical Characteristics and Figure 38 (Phase Margin vs. Capacitive Load). Driving larger capacitive loads (e.g., ADC input capacitance >20 pF) requires an isolation resistor (≥100 Ω) between VOUT and the load to maintain phase margin >70° and prevent oscillation.
What is the difference between LMP2231A and LMP2231B grades?
The LMP2231AMFE/NOPB is the "A" grade, with maximum input offset voltage drift of ±0.4 µV/°C. The "B" grade (e.g., LMP2231BMFE/NOPB) has looser drift specification: ±2.5 µV/°C max. Both share identical pinout, package, supply range, and other electrical parameters - only TCVOS and VOS distribution differ, making the A grade mandatory for high-stability applications like medical diagnostics.
Is LMP2231AMFE/NOPB qualified for automotive applications?
The LMP2231AMFE/NOPB is not AEC-Q100 qualified. However, its –40°C to +125°C operating temperature range, 120 dB PSRR, and robust ESD tolerance (2000V HBM) make it suitable for non-safety-critical automotive cabin applications (e.g., HVAC sensor interfaces, infotainment ambient light sensing) when validated per system-level requirements - TI does not guarantee automotive qualification.
LMP2231AMFE/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
LMP2231AMFE/NOPB FAQ
1.How can I place an order for LMP2231AMFE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2231AMFE/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 LMP2231AMFE/NOPB reliable?
The price and inventory of LMP2231AMFE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2231AMFE/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2231AMFE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2231AMFE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2231AMFE/NOPB?
LMP2231AMFE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2231AMFE/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 LMP2231AMFE/NOPB?
For technical support, including LMP2231AMFE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2231AMFE/NOPB requirements.
6.How does Aetrix verify that LMP2231AMFE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2231AMFE/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 LMP2231AMFE/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2231AMFE/NOPB?
All LMP2231AMFE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2231AMFE/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 LMP2231AMFE/NOPB part is unused and in its original packaging.
Return procedure for LMP2231AMFE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMP2231AMFE/NOPB Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
