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Texas Instruments LMP2012MA/NOPB
- Part No.:
- LMP2012MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP2012MA/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
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Product details
Overview
LMP2012MA/NOPB from Texas Instruments is a dual high-precision rail-to-rail output operational amplifier optimized for low-drift, low-noise DC-coupled signal conditioning. It delivers 60 µV max input offset voltage over temperature, 35 nV/√Hz input-referred voltage noise (no 1/f component), 130 dB CMRR, and 3 MHz gain-bandwidth product - enabling accurate amplification in thermocouple, strain gauge, and precision ADC buffer applications operating from 2.7 V to 5.25 V supplies.
For engineers reviewing the LMP2012MA/NOPB datasheet, LMP2012MA/NOPB pinout, LMP2012MA/NOPB application, or LMP2012MA/NOPB equivalent, key selection criteria include guaranteed low VOS drift (0.015 µV/°C), ultra-low input bias current (–3 pA typical), rail-to-rail output swing within 30 mV of rails at 5 V, and auto-zero architecture eliminating chopper-induced mixing artifacts.
Technical Context
The LMP2012MA/NOPB employs patented auto-zero architecture that continuously measures and corrects input offset voltage without chopper modulation sidebands, delivering flat-band noise down to 0.1 Hz and eliminating 1/f noise-related measurement drift. Its dual-channel design shares a common auto-zero clock but operates independently per channel.
This architecture enables stable DC performance across –40°C to +125°C while maintaining 4 V/µs slew rate and 120 dB PSRR - making it suitable for high-gain, low-frequency sensor interfaces where long-term calibration stability is critical and external capacitor-free operation is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max 60 µV over full temperature range - ensures <±0.006% gain error in 100× instrumentation amplifier configurations at room temperature. |
| Offset Drift | 0.015 µV/°C - contributes <±0.0015 µV error per °C ambient change, critical for unattended industrial monitoring systems. |
| Voltage Noise | 35 nV/√Hz (flat, no 1/f) - enables sub-µV resolution in 0.1–10 Hz bandwidths without noise corner degradation. |
| CMRR | 130 dB min - rejects >3.16 MV of common-mode interference per 1 V differential signal, essential for bridge sensor outputs. |
| Supply Current | 0.93 mA per channel - allows dual-channel precision amplification in battery-powered devices with <2 mA total quiescent draw. |
| Rail-to-Rail Output | Swings to within 30 mV of V+ and V− at 5 V supply - supports full-scale utilization of 12-bit+ SAR ADCs without level-shifting circuitry. |
| Gain-Bandwidth | 3 MHz - sustains stable unity-gain buffering and supports closed-loop gains up to ~30 at 100 kHz without phase margin loss. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplified output of Channel A; drives loads up to ±15 mA with rail-to-rail swing. |
| 2 | –IN A | Inverting input of Channel A; accepts differential signals referenced to common-mode voltage range (V− − 0.3 V) to (V+ + 0.3 V). |
| 3 | +IN A | Non-inverting input of Channel A; high-impedance node (RIN = 9 MΩ) with picoamp-level bias current. |
| 4 | V− | Negative supply rail; must be decoupled locally with ≥0.1 µF ceramic capacitor to minimize PSRR degradation. |
| 5 | +IN B | Non-inverting input of Channel B; electrically isolated from Channel A except shared supply and substrate nodes. |
| 6 | –IN B | Inverting input of Channel B; identical electrical characteristics to Pin 2, supporting independent dual-sensor conditioning. |
| 7 | OUT B | Amplified output of Channel B; fully buffered and capable of driving capacitive loads ≤500 pF without oscillation. |
| 8 | V+ | Positive supply rail; operates from 2.7 V to 5.25 V; PSRR remains >95 dB up to 100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| No 1/f noise | Flat 35 nV/√Hz spectral density from 0.1 Hz to 10 kHz eliminates low-frequency drift in DC-coupled measurements lasting minutes to hours. |
| Auto-zero architecture | Continuous offset correction at ~35 kHz eliminates need for external nulling pots or periodic recalibration in field-deployed equipment. |
| Rail-to-rail output | 30 mV headroom at 5 V supply enables direct interface to 5 V ADCs without level-shifting, preserving full dynamic range. |
| No external capacitors | Internal compensation eliminates dielectric absorption and leakage errors - critical for precision integrators and zero-drift hold circuits. |
| Copper leadframe | Minimizes thermoelectric EMF (<0.01 µV/°C) between IC leads and PCB copper, reducing thermal gradient-induced offset in sensor front-ends. |
Applications
| Thermocouple Amplifier | Strain Gauge Bridge Amplifier |
|---|---|
|
Use Scenario: Cold-junction compensation and microvolt-level thermocouple signal amplification in industrial temperature controllers. IC Role / Device Role / Timing Role: Dual-channel configuration: Channel A buffers reference junction thermistor; Channel B amplifies Type-K thermocouple output with 1000× gain. Use Value: 60 µV max VOS ensures <±0.15°C absolute accuracy over –40°C to +125°C without software calibration. |
Use Scenario: Full-bridge strain gauge readout in load cells and pressure transducers requiring matched gain and offset tracking. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end using two LMP2012MA/NOPB channels for differential gain and common-mode rejection. Use Value: 130 dB CMRR rejects bridge excitation ripple and EMI, while 0.015 µV/°C drift maintains calibration stability over thermal cycling. |
| ADC Driver for Precision Data Acquisition | Low-Drift Transducer Signal Conditioning |
|
Use Scenario: Driving 16-bit SAR ADC inputs in portable multimeters and handheld test equipment with battery-powered operation. IC Role / Device Role / Timing Role: Buffer and level-shift analog signal to match ADC input range while isolating source impedance effects. Use Value: 0.93 mA/channel supply current enables dual-channel buffering with <2 mA total, extending battery life in Class I portable instruments. |
Use Scenario: Signal conditioning for RTD, thermistor, or MEMS pressure sensors in medical diagnostic devices requiring FDA-grade stability. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding sigma-delta ADC with digital offset correction disabled. Use Value: Absence of 1/f noise ensures repeatable 0.001 Hz–10 Hz measurements critical for respiratory waveform analysis and bioimpedance spectroscopy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture with 5.2 µV max VOS, 5.6 nV/√Hz noise, and 2 MHz GBW - lower noise but reduced bandwidth vs. LMP2012MA/NOPB. | Better suited for ultra-low-noise 20-bit delta-sigma ADC drivers; less optimal for >100 kHz closed-loop bandwidth requirements. | Select OPA2189IDR when noise floor dominates system error budget and bandwidth ≤2 MHz suffices. |
| AD8629ARZ | Chopper-stabilized dual op amp with 1 µV max VOS, 12 nV/√Hz noise, and 1 MHz GBW - superior DC accuracy but exhibits chopper artifacts above 100 Hz. | Preferred for static DC measurements (e.g., weigh scales); unsuitable for AC-coupled or wideband sensor signals due to switching noise. | Select AD8629ARZ only for pure DC applications where chopper-induced distortion is irrelevant and sub-microvolt offset is mandatory. |
Compared with OPA2189IDR and AD8629ARZ, the LMP2012MA/NOPB uniquely balances 3 MHz bandwidth, 35 nV/√Hz flat noise, and 60 µV VOS guarantee - making it optimal for mixed-signal industrial sensors requiring both precision and responsiveness without chopper artifacts.
Availability
LMP2012MA/NOPB is available at Aetrix Electronics and suitable for precision instrumentation, industrial sensor interfaces, and medical device signal chains requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LMP2012MA/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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMP2012MA/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for applications demanding ultra-stable DC performance, low-noise signal integrity, and robust operation in harsh thermal environments without external trimming.
FAQ
What is the maximum operating supply voltage for the LMP2012MA/NOPB?
The LMP2012MA/NOPB has an absolute maximum supply voltage rating of 5.8 V, but its recommended operating range is 2.7 V to 5.25 V. Operation above 5.25 V risks exceeding safe junction temperature limits and may degrade long-term reliability. At 5 V supply, the LMP2012MA/NOPB delivers full rail-to-rail output swing and specified 130 dB CMRR performance.
Does the LMP2012MA/NOPB require external compensation capacitors?
No, the LMP2012MA/NOPB is internally compensated and requires no external capacitors for stability. This eliminates dielectric absorption and leakage errors common in precision integrators and zero-drift hold circuits. The internal compensation ensures stable unity-gain operation with capacitive loads up to 500 pF, as verified in TI's SNOSA71L datasheet Figure 22.
How does the auto-zero architecture of the LMP2012MA/NOPB differ from chopper-stabilized op amps?
The LMP2012MA/NOPB uses patented auto-zero techniques that correct input offset without modulating the signal path, avoiding chopper-induced mixing products and distortion. Unlike chopper amplifiers (e.g., MAX432), it exhibits no spurious tones near 150 Hz and achieves 0.02% THD+N - confirmed by comparative plots in the LMP2012MA/NOPB datasheet Figures 28 and 29.
What is the input bias current specification for the LMP2012MA/NOPB at 85°C?
At 85°C, the LMP2012MA/NOPB exhibits a typical input bias current of 0.5 nA, with both inputs sourcing current except when common-mode voltage approaches V−. This is significantly higher than the –3 pA typical value at 25°C, so high-impedance sensor interfaces operating at elevated temperatures should avoid series input resistors that could increase offset voltage.
Can the LMP2012MA/NOPB drive a 10 kΩ load while maintaining rail-to-rail output swing?
Yes - at 5 V supply and 25°C, the LMP2012MA/NOPB drives a 10 kΩ load with output swing from 4.91 V (high) to 0.04 V (low), i.e., within 90 mV of each rail. This meets the "rail-to-rail" specification and ensures full utilization of 5 V ADC input ranges without external level-shifting circuitry, as documented in Section 6.8 of the SNOSA71L datasheet.
LMP2012MA/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:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 0.12 µV
- Current - Supply:
- 930µA
- Current - Output / Channel:
- 17 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMP2012MA/NOPB FAQ
1.How can I place an order for LMP2012MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP2012MA/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 LMP2012MA/NOPB reliable?
The price and inventory of LMP2012MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP2012MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMP2012MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP2012MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP2012MA/NOPB?
LMP2012MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP2012MA/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 LMP2012MA/NOPB?
For technical support, including LMP2012MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP2012MA/NOPB requirements.
6.How does Aetrix verify that LMP2012MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP2012MA/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 LMP2012MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMP2012MA/NOPB?
All LMP2012MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP2012MA/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 LMP2012MA/NOPB part is unused and in its original packaging.
Return procedure for LMP2012MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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