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Texas Instruments LMP2234BMT/NOPB
- Part No.:
- LMP2234BMT/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LMP2234BMT/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:346
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Product details
Overview
LMP2234BMT/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, ±20 fA input bias current, 130 kHz gain bandwidth, and rail-to-rail output swing within 15 mV of supply rails - enabling high-accuracy signal conditioning in battery-powered medical devices and strain gauge bridges.
For engineers reviewing the LMP2234BMT/NOPB datasheet, LMP2234BMT/NOPB pinout, LMP2234BMT/NOPB application, or LMP2234BMT/NOPB equivalent, key selection criteria include its 1.6V to 5.5V single-supply operation, −40°C to 125°C extended temperature range, guaranteed low TCVOS performance (B-grade), and compatibility with high-impedance transducers requiring femtoampere-level input leakage control.
Technical Context
The LMP2234BMT/NOPB implements a CMOS-input, rail-to-rail output architecture optimized for precision DC-coupled amplification at sub-50 µA per channel quiescent current. Its input stage uses matched CMOS transistors to achieve ±20 fA bias current and ±150 µV VOS, while the output stage supports full-swing operation down to 15 mV from either rail under 10 kΩ load.
It features 120 dB open-loop gain, 120 dB PSRR, and 97 dB CMRR - ensuring stable closed-loop accuracy across supply and common-mode variations. The device maintains 130 kHz GBWP and 58 V/ms slew rate even at 1.8V supply, supporting low-frequency precision without compromising dynamic response in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 5.5V - enables direct operation from single-cell Li-ion, 2×AA, or regulated 3.3V/2.5V rails without level-shifting. |
| Input Offset Voltage (max) | ±150 µV - ensures ≤0.015% gain error in unity-gain buffer or 100× gain instrumentation stages at room temperature. |
| Offset Drift (TCVOS, max) | ±0.75 µV/°C (B-grade) - limits total offset shift to <150 µV over −40°C to 125°C, critical for uncalibrated industrial sensors. |
| Input Bias Current (max) | ±20 fA - preserves signal integrity from >1 GΩ source impedances (e.g., pH electrodes, piezoresistive sensors). |
| Gain Bandwidth Product | 130 kHz - supports stable 100× gain up to ~1.3 kHz, suitable for DC–audio-band sensor signal conditioning. |
| Output Swing (from rail) | 15 mV - delivers >99% of full-scale dynamic range in 3.3V systems, maximizing ADC utilization in low-voltage data acquisition. |
| Quiescent Current (per channel) | 48 µA (max at 5V) - enables four-channel precision amplification at <200 µA total, extending coin-cell life to multi-year operation. |
Pinout & Package
Package: 14-pin TSSOP (Thin Shrink Small Outline Package), 5.0 mm × 4.4 mm body, 0.65 mm pitch - compatible with automated SMT assembly and space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 12 | Inverting Input (−IN) for Channels A, B, C, D | High-impedance CMOS node accepting signals from transducers or feedback networks; requires guarding for <1 pF parasitic capacitance. |
| 2, 6, 10, 13 | Non-inverting Input (+IN) for Channels A, B, C, D | Matched to −IN for common-mode rejection; supports ground-referenced sensing when V− = GND. |
| 3, 7, 11, 14 | Output for Channels A, B, C, D | Rail-to-rail CMOS output driving ≥10 kΩ loads; swings within 15 mV of V+ or V−, minimizing headroom loss. |
| 4 | V− (Negative Supply / Ground) | Reference return for all four amplifiers; must be low-impedance to maintain PSRR and prevent ground bounce coupling. |
| 8 | V+ (Positive Supply) | Single supply input powering all channels; accepts 1.6V–5.5V with no external charge pump or regulator required. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 31 µA supply current at 1.8V - enables continuous monitoring in energy-harvesting or battery-backed IoT nodes. |
| Precision DC Performance | Guaranteed ±150 µV VOS and ±0.75 µV/°C TCVOS (B-grade) - eliminates need for system-level offset calibration in medical front-ends. |
| Ultra-Low Input Bias Current | ±20 fA - prevents loading errors in high-Z sensor circuits (e.g., thermocouples, photodiode transimpedance stages). |
| Rail-to-Rail Output | Swings to within 15 mV of V+ or V− - maximizes usable signal range in 3.3V or lower supply systems. |
| Extended Temperature Range | −40°C to +125°C operation - qualified for automotive cabin modules, industrial motor controllers, and outdoor instrumentation. |
Applications
| Precision Instrumentation Amplifiers | Battery-Powered Medical Instrumentation |
|---|---|
Use Scenario: Low-noise, high-common-mode rejection amplification of millivolt-level biopotential signals (ECG, EEG) in portable monitors. IC Role / Device Role / Timing Role: Primary gain stage in 3-op-amp IA topology, providing initial 10–100× differential amplification with minimal input loading. Use Value: ±20 fA input bias current prevents electrode polarization errors; rail-to-rail output fully utilizes 12-bit ADC input range at 3.3V supply. |
Use Scenario: Signal conditioning for disposable glucose meters using electrochemical test strips. IC Role / Device Role / Timing Role: Transimpedance amplifier converting nanoampere-level strip current into measurable voltage with stable DC gain. Use Value: ±150 µV VOS ensures <1% measurement error at 100 mV full scale; 48 µA/channel current extends CR2032 battery life beyond 500 tests. |
| High Impedance Sensors | Strain Gauge Bridge Amplifier |
Use Scenario: Interface to MEMS-based pressure sensors with >100 MΩ output impedance in wearable health patches. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sensor from downstream filtering and ADC input capacitance. Use Value: CMOS input prevents signal attenuation; 120 dB PSRR rejects noise from shared digital power rails. |
Use Scenario: Amplifying microvolt-level differential output from quarter-bridge strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with fixed 100× gain, rejecting bridge common-mode voltage and lead resistance errors. Use Value: ±0.75 µV/°C TCVOS limits thermal drift to <10 µV over 10°C ambient change - critical for uncalibrated long-term measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333P | Chopper-stabilized architecture; 0.02 µV/°C typical drift vs. LMP2234BMT/NOPB's ±0.75 µV/°C; higher 17 µA supply current per channel. | Better for zero-drift-critical DC applications (e.g., weigh scales); less suitable for ultra-low-power battery life optimization. | Select OPA2333P when sub-µV/°C drift outweighs current budget; choose LMP2234BMT/NOPB when <50 µA/channel and CMOS input are mandatory. |
| AD8602ARZ | FET-input; 65 µV max VOS, 1.5 µV/°C max TCVOS; 1 mA supply current - 20× higher than LMP2234BMT/NOPB. | Higher drive capability (50 mA output) but incompatible with micropower designs; suited for active filters, not sensor front-ends. | Choose AD8602ARZ only if output current >20 mA or bandwidth >10 MHz is required; LMP2234BMT/NOPB remains optimal for <50 µA, high-Z, precision DC. |
Compared with OPA2333P and AD8602ARZ, the LMP2234BMT/NOPB uniquely balances femtoampere input bias, sub-150 µV offset, and <50 µA quiescent current - making it irreplaceable in multi-year battery-operated sensor nodes where both precision and power are constrained.
Availability
LMP2234BMT/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 automotive, industrial, and healthcare design cycles.
Supply support for LMP2234BMT/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 op amps and low-power signal chain solutions.
The LMP2234BMT/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for micropower, high-accuracy sensor signal conditioning in portable and harsh-environment applications - emphasizing DC precision, ultra-low input current, and wide supply flexibility.
FAQ
What is the maximum guaranteed input offset voltage for LMP2234BMT/NOPB?
The LMP2234BMT/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 for the B-grade version. This value is tested and ensured - not typical - and applies under standard test conditions (V+ = 5V, TA = 25°C, RL > 1 MΩ). The LMP2234BMT/NOPB's guaranteed VOS enables accurate DC gain without factory trimming in cost-sensitive medical and industrial systems.
Does LMP2234BMT/NOPB support true rail-to-rail input common-mode range?
No, the LMP2234BMT/NOPB does not support rail-to-rail input. Its common-mode input voltage range extends 200 mV below the negative supply (V−) but only up to (V+ − 0.2 V) - for example, −0.2 V to +4.3 V at V+ = 5V. However, this "beyond-the-rail" negative range enables ground-sensing in single-supply configurations. The LMP2234BMT/NOPB's rail-to-rail output is fully supported, swinging within 15 mV of both supply rails under 10 kΩ load.
What package type is used for LMP2234BMT/NOPB, and is it RoHS-compliant?
The LMP2234BMT/NOPB is supplied in a 14-pin TSSOP package (5.0 mm × 4.4 mm, 0.65 mm pitch) with lead-free, RoHS-compliant terminal finish. The "/NOPB" suffix explicitly denotes lead-free (Pb-free) construction per JEDEC J-STD-609. This package supports fine-pitch SMT assembly and meets IPC/JEDEC standards for moisture sensitivity level (MSL) 1 - unlimited floor life at ≤30°C/60% RH.
How does the supply current of LMP2234BMT/NOPB vary with supply voltage?
The LMP2234BMT/NOPB's supply current increases linearly with supply voltage: 31 µA at 1.8V, 34 µA at 3.3V, 36 µA at 5V (all typical values). Maximum supply current is 44 µA at 2.5V, 46 µA at 3.3V, and 50 µA at 5V. This predictable scaling allows accurate battery life estimation across operating voltages - critical for devices powered by aging primary cells or variable-output energy harvesters.
Can LMP2234BMT/NOPB drive capacitive loads directly, and what is its phase margin?
The LMP2234BMT/NOPB is stable with capacitive loads up to 100 pF when driving a 10 kΩ resistive load, achieving ≥64° phase margin (min) across 1.8V–5.5V supplies. For larger loads (>100 pF), an isolation resistor (≥100 Ω) between output and capacitance is recommended. Its phase margin ensures monotonic step response without peaking - verified in Figure 37 of the SNOSAW4D datasheet - making it suitable for driving ADC input capacitors and long PCB traces in precision data acquisition.
LMP2234BMT/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
LMP2234BMT/NOPB FAQ
1.How can I place an order for LMP2234BMT/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2234BMT/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 LMP2234BMT/NOPB reliable?
The price and inventory of LMP2234BMT/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2234BMT/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2234BMT/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2234BMT/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2234BMT/NOPB?
LMP2234BMT/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2234BMT/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 LMP2234BMT/NOPB?
For technical support, including LMP2234BMT/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2234BMT/NOPB requirements.
6.How does Aetrix verify that LMP2234BMT/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2234BMT/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 LMP2234BMT/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2234BMT/NOPB?
All LMP2234BMT/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2234BMT/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 LMP2234BMT/NOPB part is unused and in its original packaging.
Return procedure for LMP2234BMT/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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