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Texas Instruments LMP2231BMAX/NOPB
- Part No.:
- LMP2231BMAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP2231BMAX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,237
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Product details
Overview
LMP2231BMAX/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 operates from 1.6V to 5.5V, draws only 10 µA supply current, delivers rail-to-rail output swing within 15 mV of either rail, and features ±150 µV max input offset voltage and ±2.5 µV/°C max offset drift - enabling high-accuracy signal conditioning in battery-powered medical devices and strain gauge amplifiers.
For engineers reviewing the LMP2231BMAX/NOPB datasheet, LMP2231BMAX/NOPB pinout, LMP2231BMAX/NOPB application, or LMP2231BMAX/NOPB equivalent, key selection criteria include its 130 kHz gain-bandwidth product at 5V, 60 nV/√Hz input voltage noise at 1 kHz, 20 fA typical input bias current, –40°C to 125°C operating temperature range, and compatibility with 1.8V–5.5V single-supply systems requiring ground-sensing capability.
Technical Context
The LMP2231BMAX/NOPB implements a CMOS-input, micropower op-amp architecture optimized for precision DC performance and low quiescent power. Its input stage uses high-impedance CMOS transistors to achieve 20 fA typical input bias current and supports common-mode input voltage down to 200 mV below the negative rail - critical for single-supply ground-referenced sensing.
It features a unity-gain-stable internal compensation scheme delivering 130 kHz GBW and 58 V/ms slew rate at 5V, with phase margin ≥78° into 20 pF capacitive load. Output stage provides rail-to-rail swing (15 mV from rails) and ±30 mA output drive capability, supporting direct interfacing to ADCs and low-power analog front-ends without external level-shifting.
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 max - ensures <0.015% gain error in 10 V full-scale measurement systems. |
| Offset Voltage Drift | ±2.5 µV/°C max (LMP2231B grade) - limits thermal drift to <0.3 mV over 100°C ambient range. |
| Input Bias Current | 20 fA typical - preserves signal integrity when amplifying high-impedance sources (>1 GΩ). |
| Gain-Bandwidth Product | 130 kHz at 5V - supports stable closed-loop operation up to ~100 kHz with moderate gain. |
| Input Voltage Noise | 60 nV/√Hz at 1 kHz - suitable for low-frequency precision measurements with minimal added noise. |
| Common-Mode Range | Extends 200 mV below V− - allows direct sensing of signals referenced to system ground in single-supply designs. |
Pinout & Package
Package: 5-Pin SOT-23 (DBV0005A), surface-mount, moisture-sensitive level 1 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection; accepts 1.6V–5.5V DC. |
| 2 | VIN− | Inverting input terminal; high-impedance CMOS node (20 fA bias current). |
| 3 | VIN+ | Non-inverting input terminal; supports common-mode voltage down to V− − 0.2 V. |
| 4 | V− | Negative supply rail (typically ground in single-supply configurations). |
| 5 | VOUT | Rail-to-rail output; swings within 15 mV of V+ or V− under 10 kΩ load. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 10 µA supply current enables >10-year battery life in 220 mAh coin cells used in portable diagnostics. |
| Precision DC performance | ±150 µV VOS and ±2.5 µV/°C TCVOS ensure stable baseline accuracy across industrial temperature range. |
| Ground-sensing input | Input common-mode range extends 200 mV below V−, allowing direct amplification of 0–VREF sensor outputs. |
| Rail-to-rail output | Output swings to within 15 mV of supply rails, maximizing dynamic range into low-voltage ADCs (e.g., 1.8V SAR). |
| Ultra-low input bias current | 20 fA typical enables use with high-Z pH electrodes, piezoresistive bridges, and photodiode transimpedance stages. |
Applications
| Portable ECG Monitor | Strain Gauge Bridge Amplifier |
|---|---|
Use Scenario: Amplifies microvolt-level biopotential signals from dry-electrode ECG sensors in wearable patches. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with DC-coupled, low-noise gain stage. Use Value: 20 fA input bias current prevents electrode polarization; 60 nV/√Hz noise preserves QRS complex fidelity. |
Use Scenario: Conditioned output of quarter-bridge strain gauges in structural health monitoring sensors. IC Role / Device Role / Timing Role: Low-drift, single-supply difference amplifier with programmable gain. Use Value: ±2.5 µV/°C TCVOS minimizes thermal zero-shift; rail-to-rail output maximizes ADC utilization. |
| Wireless Temperature Transmitter | Low-Power Thermocouple Amplifier |
Use Scenario: Signal conditioning for RTD or thermistor interfaces in battery-operated IoT temperature nodes. IC Role / Device Role / Timing Role: Precision voltage follower and buffer driving 12-bit delta-sigma ADC reference path. Use Value: 10 µA quiescent current extends 10-year battery life; 1.6V minimum supply supports aging Li-SOCl₂ cells. |
Use Scenario: Cold-junction compensation and amplification of µV-level thermocouple outputs (Type K/J). IC Role / Device Role / Timing Role: High-common-mode-rejection (97 dB CMRR) differential amplifier with low VOS drift. Use Value: ±150 µV VOS max ensures <0.5°C absolute error at 100°C; extended –40°C to 125°C rating covers outdoor enclosures. |
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 SOT-23 package. | Better DC accuracy but higher power; less suitable for multi-year battery life. | Select when VOS-critical applications outweigh micropower requirements. |
| LTC2050CS5#TRMPBF | Zero-drift architecture, 0.5 µV/°C max drift, 1.5 µA supply current, 5-pin TSOT-23. | Superior long-term stability but limited 5.5V max supply; no ground-sensing input. | Choose for ultra-stable DC offsets where input common-mode range is not constrained. |
Compared with OPA333AIDBVR and LTC2050CS5#TRMPBF, the LMP2231BMAX/NOPB uniquely balances ultra-low power (10 µA), ground-sensing capability, and robust 125°C operation - making it optimal for cost-sensitive, long-life, single-supply sensor nodes where moderate VOS is acceptable.
Availability
LMP2231BMAX/NOPB is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial sensor transmitters, and battery-powered data loggers requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LMP2231BMAX/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 LMP2231BMAX/NOPB - was engineered specifically for ultra-low-power, high-accuracy sensor interface applications in portable and industrial environments where battery life and DC stability are critical.
FAQ
What is the maximum operating temperature for the LMP2231BMAX/NOPB?
The LMP2231BMAX/NOPB is rated for continuous operation from –40°C to +125°C. This extended temperature range is validated per TI's production testing and enables reliable deployment in automotive under-hood sensors, industrial process controllers, and outdoor environmental monitors where ambient temperatures exceed standard commercial limits.
Does the LMP2231BMAX/NOPB support true rail-to-rail input?
No - the LMP2231BMAX/NOPB features rail-to-rail *output*, swinging within 15 mV of V+ or V−. Its input common-mode range extends 200 mV below V− but only to V+ – 1.2 V, so it does not support full rail-to-rail input. This design prioritizes low input bias current and precision over full input range, making it ideal for ground-referenced single-supply applications.
How does the LMP2231BMAX/NOPB differ from the LMP2231AMAX/NOPB?
The LMP2231BMAX/NOPB has a maximum input offset voltage drift of ±2.5 µV/°C, while the LMP2231AMAX/NOPB is tighter at ±0.4 µV/°C. Both share identical packaging, supply range, supply current, and noise specs. The "B" grade offers lower cost and sufficient stability for most portable instrumentation, whereas the "A" grade targets ultra-high-stability metrology-grade systems.
Can the LMP2231BMAX/NOPB drive capacitive loads directly?
The LMP2231BMAX/NOPB is unity-gain stable and characterized for phase margin ≥78° with 20 pF capacitive load. Driving larger capacitive loads (>50 pF) may cause peaking or oscillation; TI recommends adding a small series resistor (10–50 Ω) between the output and capacitive load to maintain stability in ADC driver or filter applications.
Is the LMP2231BMAX/NOPB RoHS-compliant and lead-free?
Yes - the LMP2231BMAX/NOPB carries the "NOPB" suffix, indicating lead-free (Pb-free) and RoHS-compliant construction. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards without special handling requirements.
LMP2231BMAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®, PowerWise®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 8-SOIC
LMP2231BMAX/NOPB FAQ
1.How can I place an order for LMP2231BMAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2231BMAX/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 LMP2231BMAX/NOPB reliable?
The price and inventory of LMP2231BMAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2231BMAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2231BMAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2231BMAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2231BMAX/NOPB?
LMP2231BMAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2231BMAX/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 LMP2231BMAX/NOPB?
For technical support, including LMP2231BMAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2231BMAX/NOPB requirements.
6.How does Aetrix verify that LMP2231BMAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2231BMAX/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 LMP2231BMAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2231BMAX/NOPB?
All LMP2231BMAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2231BMAX/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 LMP2231BMAX/NOPB part is unused and in its original packaging.
Return procedure for LMP2231BMAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMP2231BMAX/NOPB Tags
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