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Texas Instruments LMP2234AMTX/NOPB
- Part No.:
- LMP2234AMTX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMP2234AMTX/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMP2234AMTX/NOPB from Texas Instruments is a quad micropower precision operational amplifier with CMOS input, designed for ultra-low-power sensor interface and instrumentation applications. It delivers ±150 µV max input offset voltage, ±0.75 µV/°C max offset drift, 31 µA supply current at 1.8 V, rail-to-rail output swing within 15 mV of rails, and operates from 1.6 V to 5.5 V - enabling high-accuracy signal conditioning in battery-powered medical devices and portable instrumentation.
For engineers reviewing the LMP2234AMTX/NOPB datasheet, LMP2234AMTX/NOPB pinout, LMP2234AMTX/NOPB application, or LMP2234AMTX/NOPB equivalent, key selection criteria include guaranteed low TCVOS (±0.75 µV/°C max), sub-20 fA input bias current, 130 kHz gain-bandwidth product at 5 V, 120 dB PSRR, and operation down to 1.6 V supply - all validated across –40°C to +125°C.
Technical Context
The LMP2234AMTX/NOPB implements a CMOS-input, rail-to-rail output architecture optimized for precision DC-coupled amplification in single-supply systems. Its input stage achieves ±20 fA typical bias current and supports common-mode input down to 200 mV below V–, enabling ground-sensing configurations without level-shifting circuitry.
Internally compensated for unity-gain stability with 130 kHz GBWP and 58 V/ms slew rate, it maintains 120 dB open-loop gain and 97 dB CMRR (min) across its full operating voltage range (1.6 V–5.5 V), ensuring stable performance in low-voltage, high-impedance sensor front-ends such as strain gauge bridges and thermocouple amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6 V to 5.5 V - enables direct operation from single-cell Li-ion (3.0–3.7 V), coin cell (1.8–3.0 V), or regulated 3.3 V/5 V rails without external level translation. |
| Input Offset Voltage (max) | ±150 µV - ensures ≤0.015% error in 1 V full-scale measurements, critical for 12-bit+ precision data acquisition. |
| Offset Drift (max) | ±0.75 µV/°C - limits temperature-induced error to <1 µV over 0–70°C ambient, supporting stable calibration in unheated enclosures. |
| Supply Current per Channel | 31 µA at 1.8 V - allows four-channel operation at <125 µA total, extending shelf life of CR2032-powered portable instruments beyond 5 years. |
| Input Bias Current (max) | ±1 pA - preserves signal integrity when amplifying outputs from >1 GΩ impedance sources (e.g., pH electrodes, piezoresistive sensors). |
| Gain Bandwidth Product | 130 kHz - supports stable closed-loop gain ≥10 up to ~13 kHz, sufficient for DC–10 kHz sensor bandwidths with margin. |
| Output Swing | Rail-to-rail with ≤15 mV headroom - maximizes dynamic range in 1.8 V systems, delivering >1.75 Vpp output swing into 10 kΩ load. |
Pinout & Package
Package: 14-pin TSSOP (thin shrink small outline package), 5.0 mm × 4.4 mm × 1.2 mm body, 0.65 mm pitch - compatible with standard SMT reflow profiles and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 12 | Inverting Input (−) | High-impedance CMOS node; accepts differential signals from sensors while drawing <1 pA bias current. |
| 2, 6, 10, 13 | Non-inverting Input (+) | High-impedance CMOS node; used for reference voltage injection or single-ended sensor connection with minimal loading. |
| 3, 7, 11, 14 | Output | Rail-to-rail CMOS output capable of sourcing/sinking ≥11 mA (at 3.3 V), driving ADC inputs or low-power displays directly. |
| 4 | V− (Ground/Ref) | Negative supply terminal; supports true ground-referenced operation with common-mode input down to −0.2 V. |
| 8 | V+ | Positive supply terminal; accepts 1.6–5.5 V; internal regulation ensures stable biasing across voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 31 µA/channel at 1.8 V enables multi-year battery life in portable ECG monitors and handheld gas analyzers. |
| Precision DC Performance | ±150 µV VOS and ±0.75 µV/°C TCVOS ensure stable offset over temperature without factory recalibration. |
| Ultra-Low Input Bias Current | ±20 fA typical enables accurate amplification of nanoamp-level currents from photodiodes or ion-selective electrodes. |
| Rail-to-Rail Output | Swings within 15 mV of V+ and V−, maximizing usable signal range in low-voltage (1.8 V/2.5 V) embedded systems. |
| Wide Supply Range | 1.6 V minimum supports direct connection to aging alkaline or lithium primary cells without regulator dropout issues. |
Applications
| Strain Gauge Bridge Amplifier | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying mV-level differential output from full-bridge strain gauges in load cells or pressure transducers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with low noise, low drift, and high CMRR to reject bridge excitation ripple and thermal EMF. Use Value: Enables 16-bit resolution measurement with <0.02% nonlinearity error over industrial temperature range using only one LMP2234AMTX/NOPB per channel. |
Use Scenario: Cold-junction compensation and low-noise amplification of µV-level thermocouple outputs (e.g., Type K, J). IC Role / Device Role / Timing Role: High-input-impedance, low-drift op amp configured as differential amplifier with matched resistor network for cold-junction reference subtraction. Use Value: Achieves ±0.5°C accuracy from –40°C to +125°C without external trimming, leveraging <0.75 µV/°C drift and 60 nV/√Hz input noise. |
| Battery-Powered Medical Instrumentation | Precision Instrumentation Amplifiers |
|
Use Scenario: Signal conditioning in portable pulse oximeters, glucose meters, or wearable ECG recorders powered by CR2032 or AAA batteries. IC Role / Device Role / Timing Role: Low-power, rail-to-rail op amp for analog front-end filtering, gain setting, and ADC driver stages. Use Value: Extends device runtime to >12 months on single coin cell via 31 µA/channel quiescent current and 1.6 V minimum operation. |
Use Scenario: Building modular, high-accuracy instrumentation amplifiers for benchtop test equipment and calibration standards. IC Role / Device Role / Timing Role: Precision gain stage with 120 dB PSRR and 97 dB CMRR to suppress power supply noise and common-mode interference in noisy lab environments. Use Value: Delivers <5 ppm gain error stability over 8-hour continuous operation, verified by 120 dB open-loop gain and 0.3 µV/°C typical drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333PWR | Lower max VOS (10 µV) but higher supply current (17 µA/channel at 2.7 V); no guaranteed 1.6 V operation. | Better DC accuracy in 2.7–5.5 V systems; unsuitable for sub-2 V battery discharge phases. | Select when ultra-low offset dominates over battery life; verify 2.7 V minimum supply compatibility. |
| MCP6V81-E/SN | Higher max VOS (125 µV) and wider TCVOS range (±2.5 µV/°C); same 1.6–5.5 V range and 30 µA supply current. | Cost-optimized alternative with relaxed drift spec; suitable where ambient temperature variation is limited. | Select for cost-sensitive industrial sensors with controlled thermal environment; confirm ±2.5 µV/°C drift meets system error budget. |
Compared with OPA2333PWR and MCP6V81-E/SN, the LMP2234AMTX/NOPB uniquely balances guaranteed low drift (±0.75 µV/°C), sub-20 fA bias current, and 1.6 V operation - making it optimal for long-life, wide-temperature, high-impedance sensor interfaces where both voltage headroom and thermal stability are constrained.
Availability
LMP2234AMTX/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 extended temperature ranges and multi-year production cycles.
Supply support for LMP2234AMTX/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 amplifiers and low-power signal chain solutions.
The LMP2234AMTX/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for micropower, high-accuracy sensor signal conditioning in portable, battery-operated, and industrial-grade measurement systems.
FAQ
What is the maximum operating temperature range for the LMP2234AMTX/NOPB?
The LMP2234AMTX/NOPB is fully specified from –40°C to +125°C. All key parameters-including input offset voltage, offset drift, supply current, and CMRR-are ensured across this range per the datasheet's Operating Ratings table. This makes the LMP2234AMTX/NOPB suitable for under-hood automotive sensors, industrial process controllers, and outdoor medical devices where ambient extremes occur.
Does the LMP2234AMTX/NOPB support true rail-to-rail input common-mode range?
No-the LMP2234AMTX/NOPB supports rail-to-rail *output* swing (within 15 mV of V+ and V−), but its input common-mode range extends only to 200 mV below V− and up to V+ − 0.2 V. This allows ground-sensing in single-supply configurations but does not support full rail-to-rail input. For example, at V+ = 1.8 V and V− = 0 V, valid input range is –0.2 V to 1.6 V.
Can the LMP2234AMTX/NOPB drive capacitive loads without instability?
The LMP2234AMTX/NOPB is unity-gain stable with capacitive loads up to 100 pF, as confirmed by phase margin measurements ≥64° across supply voltages (1.8 V–5.5 V) and load conditions. For loads >100 pF, an isolation resistor (≥100 Ω) between output and capacitance is recommended to maintain stability-verified in Figure 37 of the SNOSAW4D datasheet.
Is the LMP2234AMTX/NOPB pin-compatible with other LMP223x variants?
Yes-the LMP2234AMTX/NOPB shares identical 14-pin TSSOP pinout and footprint with all LMP2234 variants (e.g., LMP2234MME/NOPB, LMP2234MMX/NOPB), including the A-grade (±150 µV VOS) and B-grade (±250 µV VOS) versions. No PCB redesign is required when upgrading or substituting within the LMP2234 family.
What is the typical input voltage noise density of the LMP2234AMTX/NOPB at 1 kHz?
The LMP2234AMTX/NOPB has a typical input-referred voltage noise density of 60 nV/√Hz at 1 kHz, consistent across all tested supply voltages (1.8 V–5.5 V). This value is specified in both AC Electrical Characteristics tables and confirmed in Figure 46 (Input Voltage Noise vs. Frequency), making it suitable for low-frequency precision applications where 1/f noise dominates.
LMP2234AMTX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
LMP2234AMTX/NOPB FAQ
1.How can I place an order for LMP2234AMTX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2234AMTX/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 LMP2234AMTX/NOPB reliable?
The price and inventory of LMP2234AMTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2234AMTX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2234AMTX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2234AMTX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2234AMTX/NOPB?
LMP2234AMTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2234AMTX/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 LMP2234AMTX/NOPB?
For technical support, including LMP2234AMTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2234AMTX/NOPB requirements.
6.How does Aetrix verify that LMP2234AMTX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2234AMTX/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 LMP2234AMTX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2234AMTX/NOPB?
All LMP2234AMTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2234AMTX/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 LMP2234AMTX/NOPB part is unused and in its original packaging.
Return procedure for LMP2234AMTX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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