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Texas Instruments LMP2234BMAX/NOPB
- Part No.:
- LMP2234BMAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP2234BMAX/NOPB.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,471
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Product details
Overview
LMP2234BMAX/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 amplifiers.
For engineers reviewing the LMP2234BMAX/NOPB datasheet, LMP2234BMAX/NOPB pinout, LMP2234BMAX/NOPB application, or LMP2234BMAX/NOPB equivalent, key selection criteria include its 1.6V to 5.5V single-supply operation, −40°C to 125°C extended temperature range, 31 µA supply current at 1.8V, and guaranteed performance across 1.8V/2.5V/3.3V/5V supply conditions.
Technical Context
The LMP2234BMAX/NOPB implements a CMOS-input, fully differential input stage with chopper-stabilized architecture to achieve low offset and drift. Its internal compensation ensures stable unity-gain operation with capacitive loads up to 100 pF and provides 64°–70° phase margin across 1.8V–5V supplies.
It supports true single-supply operation with common-mode input range extending 200 mV below V− and rail-to-rail output swing (12–17 mV from rails depending on supply), making it suitable for ground-sensing configurations without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 5.5V - enables direct integration into Li-ion, coin-cell, and low-voltage industrial systems without regulation. |
| Input Offset Voltage (max) | ±150 µV - ensures ≤0.003% error in 5V full-scale precision measurement paths. |
| Offset Drift (max) | ±0.75 µV/°C - limits thermal-induced error to <1 µV over 10°C ambient shift. |
| Supply Current per Channel | 31 µA at 1.8V - allows four-channel operation at <124 µA total, extending 10-year battery life in portable sensors. |
| Gain Bandwidth Product | 130 kHz - supports DC–10 kHz signal bandwidth with ≥10× closed-loop gain stability. |
| Input Bias Current | ±20 fA - prevents leakage-induced errors in >1 GΩ source impedances (e.g., pH electrodes, piezoresistive sensors). |
| CMRR / PSRR | 97 dB / 120 dB - rejects power supply ripple and common-mode interference in noisy industrial environments. |
Pinout & Package
Package: 14-pin SOIC (Small Outline Integrated Circuit), body size 8.65 mm × 3.91 mm, standard JEDEC MS-012AC, RoHS-compliant, lead-free (NOPB suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | High-impedance CMOS node for differential sensing; accepts signals down to 200 mV below V−. |
| 2 | Non-Inverting Input A | Matches Pin 1 impedance; used with external feedback for precision gain configuration. |
| 3 | Output A | Rail-to-rail output driving 10 kΩ load; swings within 12–17 mV of V+ or V− depending on supply. |
| 4 | V− (Ground) | Reference return for all four amplifiers; supports single-supply operation with V− = 0 V. |
| 5 | Non-Inverting Input B | Independent input for second amplifier channel; electrically isolated from other channels. |
| 6 | Inverting Input B | Complements Pin 5; enables dual instrumentation amplifier stages on one IC. |
| 7 | Output B | Second rail-to-rail output; identical AC/DC specs to Pin 3. |
| 8 | Output C | Third independent output; shares same supply pins and thermal characteristics as Pins 3/7. |
| 9 | Inverting Input C | Third amplifier input; validated for operation at 1.6V supply with full spec compliance. |
| 10 | Non-Inverting Input C | Matches Pin 9; supports multi-channel sensor front-end with matched offset tracking. |
| 11 | V+ | Positive supply rail for all four op-amps; accepts 1.6V–5.5V with monotonic parameter behavior. |
| 12 | Output D | Fourth rail-to-rail output; enables full quad configuration without external interconnects. |
| 13 | Inverting Input D | Final amplifier input; characterized for TCVOS and IBIA matching across all four channels. |
| 14 | Non-Inverting Input D | Completes quad set; supports simultaneous acquisition from four independent high-Z sources. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 31 µA/channel at 1.8V enables 4-channel analog front-end in sub-150 µA total system budget. |
| Precision DC Performance | Guaranteed ±150 µV VOS and ±0.75 µV/°C TCVOS over −40°C to 125°C ensures calibration stability in uncontrolled environments. |
| Ultra-Low Input Bias Current | ±20 fA maximum eliminates loading error in >10 GΩ sensor interfaces (e.g., electrochemical biosensors). |
| Rail-to-Rail Output | Swings to within 12 mV of V+ and 13 mV of V− at 1.8V supply, maximizing dynamic range in low-voltage systems. |
| Extended Common-Mode Range | Operates with inputs 200 mV below V−, allowing direct ground-referenced signal acquisition without level shifters. |
| Wide Supply Flexibility | Fully specified from 1.6V to 5.5V - interoperable with energy-harvesting PMIC outputs and legacy 5V rails. |
Applications
| Precision Instrumentation Amplifiers | Battery-Powered Medical Instrumentation |
|---|---|
Use Scenario: High-gain, low-noise amplification of microvolt-level biopotential signals (ECG, EEG) in portable monitors. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in first-stage instrumentation topology with matched quad channels for common-mode rejection. Use Value: ±20 fA input bias current prevents electrode polarization drift; 60 nV/√Hz noise density preserves SNR in 0.05–150 Hz physiological bands. |
Use Scenario: Continuous glucose monitor (CGM) analog front-end acquiring current from enzyme-based amperometric sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level sensor current to voltage with minimal offset-induced baseline error. Use Value: ±150 µV VOS ensures <0.1% full-scale error at 150 mV output; 31 µA/channel extends coin-cell lifetime beyond 3 years. |
| High-Impedance Sensors | Strain Gauge Bridge Amplifier |
Use Scenario: Interface to MEMS capacitive pressure sensors requiring ultra-high input impedance and minimal leakage. IC Role / Device Role / Timing Role: Buffer and gain stage for charge-amplifier output, preserving signal integrity from >10 GΩ sensor elements. Use Value: ±20 fA IB guarantees <1 µV error from sensor self-discharge over 10-second integration windows. |
Use Scenario: Wheatstone bridge readout in structural health monitoring systems deployed in remote, battery-constrained locations. IC Role / Device Role / Timing Role: In-amp reference buffer and differential output driver with matched quad topology for ratiometric excitation and sensing. Use Value: ±0.75 µV/°C TCVOS limits temperature-induced bridge imbalance to <5 µV over −40°C to 85°C operating range. |
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 | Single-supply, zero-drift architecture; 0.02 µV/°C typical drift vs. LMP2234BMAX/NOPB's ±0.75 µV/°C max; 17 µA supply current at 1.8V. | Better drift performance but higher cost; requires external reference for bipolar operation. | Select when long-term DC stability dominates over quiescent power; verify layout compatibility with different pinout (SOIC-8 vs. SOIC-14). |
| AD8602ARZ | Higher supply current (1 mA/channel); wider GBW (10 MHz); no guaranteed 1.6V operation - min 2.7V. | Unsuitable for sub-2V battery systems; better for high-speed, moderate-power applications. | Choose only if system operates ≥2.7V and requires >100 kHz closed-loop bandwidth; not a drop-in replacement due to voltage and power mismatch. |
Compared with OPA2333AIDR and AD8602ARZ, the LMP2234BMAX/NOPB uniquely balances ultra-low power (31 µA), guaranteed 1.6V operation, and precision DC specs - making it optimal for energy-constrained, wide-temperature, high-impedance sensor nodes where zero-drift isn't mandatory.
Availability
LMP2234BMAX/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 portable healthcare programs.
Supply support for LMP2234BMAX/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 over 90 years of innovation in precision signal chain solutions.
The LMP™ precision amplifier family, including the LMP2234BMAX/NOPB, was engineered specifically for ultra-low-power, high-accuracy sensor interface and portable instrumentation applications demanding extended battery life and robust DC performance.
FAQ
What is the maximum guaranteed input offset voltage for LMP2234BMAX/NOPB?
The LMP2234BMAX/NOPB has a maximum input offset voltage of ±150 µV across the full operating temperature range (−40°C to 125°C) and supply voltages from 1.6V to 5.5V, as specified in the TI SNOSAW4D datasheet Section 5.1. This value is tested and ensured - not typical - and applies to the "B" grade variant explicitly identified in the part number.
Does LMP2234BMAX/NOPB support true single-supply operation with input signals referenced to ground?
Yes. The LMP2234BMAX/NOPB supports true single-supply operation with a common-mode input voltage range extending 200 mV below the negative supply rail (V−). When V− = 0 V, inputs can go down to −0.2 V, enabling direct ground-referenced sensor interfacing without level-shifting circuitry - a key feature confirmed in the Electrical Characteristics tables for all supply voltages.
What is the minimum supply voltage at which LMP2234BMAX/NOPB maintains full DC specifications?
The LMP2234BMAX/NOPB maintains fully specified DC performance down to 1.6 V, as stated in both the Features list and Operating Ratings section of the datasheet. At 1.8 V, supply current is 31 µA (typical), and parameters including VOS, TCVOS, CMRR, and PSRR remain within guaranteed limits - verified across −40°C to 125°C.
Is LMP2234BMAX/NOPB pin-compatible with other variants in the LMP2234 family?
Yes. All LMP2234 variants - including LMP2234AMAX/NOPB (A-grade), LMP2234BMAX/NOPB (B-grade), and LMP2234QMA/NOPB (automotive) - share identical 14-pin SOIC and TSSOP footprints and pinouts. The "B" suffix denotes the ±0.75 µV/°C max TCVOS grade, but electrical connectivity and mechanical mounting are fully interchangeable.
Can LMP2234BMAX/NOPB drive capacitive loads, and what is the recommended compensation?
The LMP2234BMAX/NOPB is stable driving capacitive loads up to 100 pF with a 10 kΩ series resistor in the feedback path, as demonstrated in Figure 37 (Phase Margin vs. Capacitive Load) and confirmed by ≥64° phase margin across 1.8V–5V supplies. No external compensation is required for CL ≤ 20 pF; for larger loads, add a 10 kΩ isolation resistor between output and capacitor.
LMP2234BMAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LMP2234BMAX/NOPB FAQ
1.How can I place an order for LMP2234BMAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2234BMAX/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 LMP2234BMAX/NOPB reliable?
The price and inventory of LMP2234BMAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2234BMAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2234BMAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2234BMAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2234BMAX/NOPB?
LMP2234BMAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2234BMAX/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 LMP2234BMAX/NOPB?
For technical support, including LMP2234BMAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2234BMAX/NOPB requirements.
6.How does Aetrix verify that LMP2234BMAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2234BMAX/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 LMP2234BMAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2234BMAX/NOPB?
All LMP2234BMAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2234BMAX/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 LMP2234BMAX/NOPB part is unused and in its original packaging.
Return procedure for LMP2234BMAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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