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Texas Instruments LMP2234AMA/NOPB
- Part No.:
- LMP2234AMA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP2234AMA/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,689
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Product details
Overview
LMP2234AMA/NOPB from Texas Instruments is a quad micropower precision operational amplifier with CMOS input, rail-to-rail output, and 1.6V to 5.5V supply operation. It delivers ±150 µV max input offset voltage, ±0.75 µV/°C max TCVOS, 31 µA supply current at 1.8V, 130 kHz gain bandwidth, and operates from –40°C to 125°C - ideal for battery-powered medical instrumentation and high-impedance sensor interfaces.
For engineers reviewing the LMP2234AMA/NOPB datasheet, LMP2234AMA/NOPB pinout, LMP2234AMA/NOPB application, or LMP2234AMA/NOPB equivalent, key selection criteria include ultra-low quiescent current across 1.6–5.5V supply range, sub-picoampere input bias current (±20 fA), rail-to-rail output swing within 15 mV of rails, and guaranteed precision performance over automotive temperature range.
Technical Context
The LMP2234AMA/NOPB integrates four independent precision op-amps in a single monolithic CMOS die, each featuring chopper-stabilized-like offset control without modulation artifacts. Its input stage uses high-impedance CMOS transistors enabling ±20 fA input bias current and >1015 Ω input resistance, critical for interfacing with strain gauges and thermocouples.
It employs a fully differential input architecture with 97 dB common-mode rejection and 120 dB power supply rejection, supporting stable closed-loop operation down to 1.6V supply while maintaining 120 dB open-loop gain and 58 V/ms slew rate - enabling accurate DC-coupled amplification and low-distortion signal conditioning in single-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 5.5V - enables direct operation from single Li-ion, 2×AA, or regulated 3.3V/2.5V rails without level-shifting. |
| Max Input Offset Voltage | ±150 µV - ensures ≤0.003% gain error in 100× instrumentation amplifier configurations at room temperature. |
| Max Offset Drift | ±0.75 µV/°C (LMP2234A grade) - limits total offset drift to <100 µV over –40°C to 125°C industrial range. |
| Input Bias Current | ±20 fA - permits use with >1 GΩ source impedances (e.g., pH electrodes, piezoresistive sensors) without significant error. |
| Gain Bandwidth Product | 130 kHz - supports stable unity-gain buffering and low-frequency signal conditioning up to ~10 kHz with phase margin >65°. |
| Rail-to-Rail Output Swing | Within 15 mV of V+ and V– - maximizes dynamic range in single-supply data acquisition systems using 12-bit+ ADCs. |
| Quiescent Current per Channel | 31 µA at 1.8V - enables four-channel precision amplification with <125 µA total supply current, extending coin-cell battery life to years. |
Pinout & Package
Package: 14-pin SOIC (Small Outline Integrated Circuit), body width 3.9 mm, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 12 | Inverting Input (–) | High-impedance CMOS node; accepts signals down to 200 mV below V– for ground-sensing applications. |
| 2, 6, 10, 13 | Non-inverting Input (+) | Matches inverting input specs; enables true differential sensing with matched input characteristics. |
| 3, 7, 11, 14 | Output | Rail-to-rail capable; sources/sinks ≥11 mA at 3.3V, swings within 15 mV of supply rails under 10 kΩ load. |
| 4 | V– (Negative Supply) | Ground reference for single-supply operation; common return for all four amplifiers. |
| 8 | V+ (Positive Supply) | Single positive rail input; powers all four channels; supports 1.6V–5.5V operation with no external charge pump. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 31 µA per channel at 1.8V enables multi-year battery life in portable ECG monitors and handheld gas analyzers. |
| Ultra-Low Input Bias Current | ±20 fA allows direct connection to high-Z sensors (e.g., glass pH electrodes, capacitive humidity sensors) without guard rings or leakage compensation. |
| Guaranteed Precision Over Temp | ±150 µV VOS and ±0.75 µV/°C TCVOS specified over –40°C to 125°C - eliminates need for system-level calibration in automotive cabin sensors. |
| Rail-to-Rail Output | Swings to within 15 mV of V+ and V– - preserves full ADC input range when driving 12-bit SAR converters from 3.3V rails. |
| High PSRR & CMRR | 120 dB PSRR and 97 dB CMRR suppress noise from shared PCB power rails and reject common-mode interference in noisy industrial environments. |
Applications
| Precision Instrumentation Amplifiers | Battery-Powered Medical Instrumentation |
|---|---|
Use Scenario: Low-noise, high-common-mode-rejection front-end for portable blood pressure monitors and digital stethoscopes. IC Role / Device Role / Timing Role: Quad amplifier configured as three-op-amp IA with matched gain-setting resistors and active filtering. Use Value: Enables 0.1% accuracy over temperature without recalibration, leveraging matched VOS and TCVOS across channels. | Use Scenario: Signal conditioning for wearable ECG/EEG patches powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Four independent channels for lead-I/II/III derivation, right-leg drive, and battery voltage monitoring. Use Value: Sub-125 µA total quiescent current extends CR2032 life beyond 3 years in standby mode. |
| High Impedance Sensors | Strain Gauge Bridge Amplifier |
Use Scenario: Interface to ceramic humidity sensors and MEMS-based barometric pressure transducers with >100 MΩ output impedance. IC Role / Device Role / Timing Role: Buffer and gain stage for high-Z capacitive or resistive elements; drives ADC input directly. Use Value: ±20 fA input bias prevents measurement drift and enables stable 16-bit resolution at 1 SPS sampling. | Use Scenario: Amplification of mV-level outputs from quarter-bridge load cells in industrial weighing terminals. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with 100× gain and low-pass filtering before ADC digitization. Use Value: ±150 µV VOS contributes <0.015% FS error at 10 mV full-scale bridge output, meeting Class III legal-for-trade requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Chopper-stabilized architecture; 0.02 µV/°C typical drift vs. LMP2234AMA/NOPB's 0.3 µV/°C typical; higher 17 µA supply current per channel. | Better for sub-µV drift-critical applications (e.g., precision weigh scales); less suitable for ultra-low-power battery designs. | Select OPA2333AIDR when drift dominates error budget; choose LMP2234AMA/NOPB when supply current <35 µA/channel is mandatory. |
| AD8604ARUZ | FET-input; 65 µV max VOS; 1 pA input bias current; 50 µA supply current; 8 MHz GBW - significantly faster but consumes >1.5× more power. | Suitable for higher-bandwidth sensor interfaces (e.g., ultrasonic flow meters); not viable for multi-year coin-cell operation. | Select AD8604ARUZ when bandwidth >100 kHz is required; retain LMP2234AMA/NOPB for <130 kHz, <125 µA total, and <150 µV VOS constraints. |
Compared with OPA2333AIDR and AD8604ARUZ, the LMP2234AMA/NOPB uniquely balances ultra-low quiescent current (31 µA/channel), precision (±150 µV VOS), and wide supply range (1.6V–5.5V) - making it optimal for long-life, single-supply, high-accuracy analog front-ends where speed is secondary to power and DC accuracy.
Availability
LMP2234AMA/NOPB is available at Aetrix Electronics and suitable for precision instrumentation amplifiers, battery-powered medical instrumentation, and high-impedance sensor interface applications requiring stable component supply and guaranteed long-term availability.
Supply support for LMP2234AMA/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 company specializing in analog and embedded processing technologies, with leadership in precision analog signal chain solutions.
The LMP™ precision amplifier family, including the LMP2234AMA/NOPB, was designed for ultra-low-power, high-accuracy signal conditioning in portable and energy-constrained systems - emphasizing DC precision, rail-to-rail operation, and extended temperature reliability.
FAQ
What is the maximum operating supply voltage for the LMP2234AMA/NOPB?
The LMP2234AMA/NOPB has an absolute maximum supply voltage rating of 6V, but its specified operating range is 1.6V to 5.5V. Operation above 5.5V voids guaranteed performance and risks permanent damage. All electrical characteristics - including VOS, GBWP, and output swing - are ensured only within the 1.6V–5.5V range per the SNOSAW4D datasheet.
Does the LMP2234AMA/NOPB support rail-to-rail input common-mode range?
No, the LMP2234AMA/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 4.2V below V+ at 5V supply - sufficient for ground-sensing in single-supply configurations but not to the positive rail. The datasheet specifies CMVR as –0.2 V to 4.2 V (at VS = 5V), confirming limited high-side headroom.
Is the LMP2234AMA/NOPB pin-compatible with other LMP2234 variants like LMP2234MME/NOPB?
Yes, the LMP2234AMA/NOPB is pin-compatible with all LMP2234 variants offered in the same 14-pin SOIC package, including LMP2234MME/NOPB (TSSOP) and LMP2234MMX/NOPB (tape-and-reel SOIC). Pin functions and physical layout match exactly per Figure 2 of SNOSAW4D; only packaging, grading, and reel specifications differ between variants.
What is the thermal resistance (θJA) of the LMP2234AMA/NOPB in its SOIC package?
The LMP2234AMA/NOPB in 14-pin SOIC has a junction-to-ambient thermal resistance (θJA) of 101.5 °C/W, as specified in the Operating Ratings table of SNOSAW4D. This value assumes standard JEDEC 2-layer board mounting; actual θJA may vary with PCB copper area and airflow. Maximum junction temperature remains 150°C under continuous operation.
Can the LMP2234AMA/NOPB drive a 10 kΩ load across its full temperature range?
Yes, the LMP2234AMA/NOPB guarantees output current capability of ≥11 mA sourcing and ≥8 mA sinking into 10 kΩ loads across –40°C to 125°C, per the 3.3V DC Electrical Characteristics table. At 1.8V supply, minimum sourcing is 2.5 mA - still sufficient for 10 kΩ loads with ≤25 mV droop, confirmed by VO swing data showing <50 mV from rail under that condition.
LMP2234AMA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 0.048V/µs
- Gain Bandwidth Product:
- 130 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.02 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 36µA (x4 Channels)
- 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:
- 14-SOIC
LMP2234AMA/NOPB FAQ
1.How can I place an order for LMP2234AMA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2234AMA/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 LMP2234AMA/NOPB reliable?
The price and inventory of LMP2234AMA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2234AMA/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2234AMA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2234AMA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2234AMA/NOPB?
LMP2234AMA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2234AMA/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 LMP2234AMA/NOPB?
For technical support, including LMP2234AMA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2234AMA/NOPB requirements.
6.How does Aetrix verify that LMP2234AMA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2234AMA/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 LMP2234AMA/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2234AMA/NOPB?
All LMP2234AMA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2234AMA/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 LMP2234AMA/NOPB part is unused and in its original packaging.
Return procedure for LMP2234AMA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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