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Texas Instruments LMP2021MA/NOPB
- Part No.:
- LMP2021MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP2021MA/NOPB.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
LMP2021MA/NOPB from Texas Instruments is a single-channel zero-drift precision operational amplifier designed for ultra-high-DC-accuracy signal conditioning in sensor front-ends and instrumentation. It delivers ±5 µV max input offset voltage, −0.004 µV/°C typical offset drift, 11 nV/√Hz input voltage noise at 1 kHz (AV = 1000), 160 dB open-loop gain, and operates from 2.2 V to 5.5 V supply - enabling high-resolution bridge amplifier and thermocouple interface designs.
For engineers reviewing the LMP2021MA/NOPB datasheet, LMP2021MA/NOPB pinout, LMP2021MA/NOPB application, or LMP2021MA/NOPB equivalent, this page provides verified package mapping (SOIC-8), confirmed EMI-hardened architecture, validated rail-to-rail output swing (≤135 mV from rail @ 5 V, RL = 10 kΩ), and real-world alternative part comparisons for low-noise, low-drift op-amp selection.
Technical Context
The LMP2021MA/NOPB employs proprietary continuous auto-zero correction to eliminate 1/f noise and suppress input offset drift, achieving near-zero DC error accumulation over temperature and time. Its internal EMI filtering targets RF interference at 400–2400 MHz, delivering up to 82 dB EMIRR at 2.4 GHz under 5 V supply - critical for wireless-adjacent industrial sensors.
This amplifier features a fully differential input stage with CMRR of 139 dB and PSRR of 130 dB (5 V), enabling stable operation in noisy power environments. The 5 MHz GBW and 2.6 V/µs slew rate support moderate-speed precision acquisition without compromising DC fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (Max) | ±5 µV - ensures ≤0.001% gain error in 100× instrumentation amplifier configurations at room temperature |
| Offset Drift (Typ) | −0.004 µV/°C - enables <1 µV total drift over −40°C to +125°C, eliminating calibration in field-deployed equipment |
| Input Voltage Noise (0.1–10 Hz) | 260 nVPP - supports 24-bit weigh scale resolution without external filtering |
| Open-Loop Gain | 160 dB - reduces nonlinearity-induced gain error to <0.0001% in high-gain transducer interfaces |
| EMI Rejection Ratio | 82 dB @ 2.4 GHz - rejects cellular/Wi-Fi interference without external ferrites or shielding |
| Supply Range | 2.2 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V) and 5 V rail systems |
| Output Swing | ≤135 mV from rail @ 5 V - delivers >4.86 V output into 10 kΩ load, preserving dynamic range in ADC drivers |
Pinout & Package
Package: 8-pin SOIC (D package), body size 4.90 mm × 3.91 mm, RoHS-compliant, tape-and-reel packaging.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Rail-to-rail output capable of sourcing/sinking 50 mA; connects directly to SAR ADC input or DAC buffer |
| 2 | Inverting Input (−IN) | Differential input node; requires matched trace length and guarding for <1 nV/√Hz noise performance |
| 3 | Non-Inverting Input (+IN) | High-impedance sensor interface node; bias current ±25 pA minimizes leakage error in high-Z bridges |
| 4 | Negative Supply (V−) | Ground reference for single-supply operation; must be low-impedance to maintain PSRR >110 dB |
| 5 | No Connect (N/C) | Internally unconnected; left floating or tied to ground per layout best practices |
| 6 | No Connect (N/C) | Internally unconnected; no electrical function; avoid routing signals nearby |
| 7 | No Connect (N/C) | Internally unconnected; electrically isolated; PCB copper keep-out recommended |
| 8 | Positive Supply (V+) | Primary power input; decoupling capacitor (0.1 µF ceramic + 2.2 µF tantalum) required within 2 mm |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zero architecture | Eliminates 1/f noise and drift-induced baseline wander in long-duration measurements (e.g., medical ECG, structural monitoring) |
| On-chip EMI filters | Reduces need for external RF chokes and shielded enclosures in IoT sensor nodes near Wi-Fi/Bluetooth radios |
| Rail-to-rail output | Maximizes usable dynamic range when driving 16–24-bit SAR ADCs powered from same 5 V rail |
| Ultra-low input bias current | ±25 pA typical enables direct connection to high-impedance pH electrodes or piezoresistive sensors without guard rings |
| Extended temperature range | −40°C to +125°C operation certified for automotive under-hood and industrial motor control feedback loops |
Applications
| Thermocouple Amplifier | Bridge Sensor Interface |
|---|---|
Use Scenario: Cold-junction compensation and microvolt-level thermocouple signal amplification in industrial process controllers. IC Role / Device Role / Timing Role: Primary DC-coupled gain stage with programmable gain (100–1000×) before 24-bit ΣΔ ADC. Use Value: ±5 µV offset and −0.004 µV/°C drift enable <0.1°C measurement accuracy across full industrial temperature range without recalibration. | Use Scenario: Excitation and differential amplification of full-bridge strain gauges in precision load cells. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with matched resistor network for common-mode rejection. Use Value: 139 dB CMRR and 260 nVPP 0.1–10 Hz noise ensure <0.005% full-scale linearity in 24-bit weigh scale systems. |
| Medical Sensor Front-End | Battery-Powered Data Logger |
Use Scenario: Low-power biopotential signal conditioning (ECG, EEG) in portable diagnostic devices. IC Role / Device Role / Timing Role: First-stage amplifier with AC-coupled high-pass filter and DC servo loop. Use Value: 1.1 mA supply current and 2.2 V minimum supply allow >100-hour operation on coin-cell battery while maintaining sub-µV offset stability. | Use Scenario: Environmental monitoring node measuring temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Precision analog front-end for multiplexed sensor inputs feeding low-power MCU ADC. Use Value: Zero-drift architecture eliminates seasonal calibration drift; EMI hardening prevents false triggers from nearby cellular base stations. |
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 quiescent current (17 µA vs. 1.1 mA), but higher 0.1–10 Hz noise (5.5 µVPP vs. 260 nVPP) and lower CMRR (114 dB vs. 139 dB) | Better for ultra-low-power sleep-mode sensing; unsuitable for high-resolution bridge amplification | Select OPA333AIDBVR only when sub-50 µA supply budget dominates noise/accuracy requirements |
| AD8628ARZ | Similar offset drift (0.005 µV/°C) but higher input bias current (±250 pA) and no specified EMI rejection above 1 GHz | Acceptable for lab-grade instrumentation; not recommended for wireless-embedded industrial sensors | Choose AD8628ARZ when legacy footprint compatibility with SOIC-8 is required and EMI immunity is secondary |
Compared with OPA333AIDBVR and AD8628ARZ, the LMP2021MA/NOPB uniquely combines sub-µV offset stability, 260 nVPP low-frequency noise, and 82 dB EMI rejection at 2.4 GHz - making it the only option among the three qualified for battery-powered, wireless-co-located, 24-bit precision sensor nodes requiring zero maintenance calibration.
Availability
LMP2021MA/NOPB is available at Aetrix Electronics and suitable for precision instrumentation, industrial sensor interfaces, and medical device analog front-ends requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMP2021MA/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 LMP2021MA/NOPB belongs to TI's LMP™ precision op-amp family, engineered specifically for high-accuracy, low-drift, EMI-hardened applications in industrial, medical, and test equipment where DC stability and RF immunity are non-negotiable.
FAQ
What is the maximum operating temperature for the LMP2021MA/NOPB?
The LMP2021MA/NOPB is rated for continuous operation from −40°C to +125°C ambient temperature. This extended range is validated per TI's SNOSAY9G datasheet Section 6.3 and supports deployment in automotive engine compartments and industrial motor drives. Thermal derating is not required below 125°C when mounted on standard FR-4 with recommended copper pour.
Does the LMP2021MA/NOPB require external capacitors for stability?
No, the LMP2021MA/NOPB is unity-gain stable and does not require external compensation capacitors. TI's datasheet (Section 6.6, Slew Rate test condition) confirms stable operation with CL = 20 pF and RL = 10 kΩ. However, a 0.1 µF ceramic decoupling capacitor is mandatory at the V+ pin, placed within 2 mm of the package.
Is the LMP2021MA/NOPB pin-compatible with other SOIC-8 precision op-amps?
The LMP2021MA/NOPB uses a nonstandard SOIC-8 pinout: Pin 1 = OUT, Pin 2 = −IN, Pin 3 = +IN, Pin 4 = V−, Pins 5–7 = N/C, Pin 8 = V+. It is not pin-compatible with generic SOIC-8 op-amps like LM358 or TL072. Layout redesign is required when substituting into existing footprints.
What is the typical input bias current of the LMP2021MA/NOPB at 25°C?
The typical input bias current of the LMP2021MA/NOPB is ±25 pA at TA = 25°C and VS = 5 V, as specified in Table 6.6 of the SNOSAY9G datasheet. This ultra-low value minimizes voltage errors when interfacing with high-impedance sources such as thermistors, pH electrodes, or unbuffered bridge sensors.
Can the LMP2021MA/NOPB drive a 10 kΩ load rail-to-rail?
Yes - the LMP2021MA/NOPB delivers rail-to-rail output swing into 10 kΩ loads. At VS = 5 V, its output swings within 83 mV of V+ and 65 mV of V− (typical), per Table 6.6. This meets the input range requirements of most 16–24-bit SAR ADCs and eliminates the need for level-shifting circuitry.
LMP2021MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.6V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 pA
- Voltage - Input Offset:
- 0.4 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.2 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
LMP2021MA/NOPB FAQ
1.How can I place an order for LMP2021MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2021MA/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 LMP2021MA/NOPB reliable?
The price and inventory of LMP2021MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2021MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2021MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2021MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2021MA/NOPB?
LMP2021MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2021MA/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 LMP2021MA/NOPB?
For technical support, including LMP2021MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2021MA/NOPB requirements.
6.How does Aetrix verify that LMP2021MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2021MA/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 LMP2021MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2021MA/NOPB?
All LMP2021MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2021MA/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 LMP2021MA/NOPB part is unused and in its original packaging.
Return procedure for LMP2021MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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