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Texas Instruments LF412MH/NOPB
- Part No.:
- LF412MH/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LF412MH/NOPB.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:294
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Product details
Overview
LF412MH/NOPB from Texas Instruments is a low-offset, low-drift dual JFET-input operational amplifier in TO-99 metal can package, featuring 1 mV max input offset voltage, 7 µV/°C typical drift, 50 pA input bias current, 3 MHz gain-bandwidth product, and 10 V/µs minimum slew rate. It serves as a precision signal conditioning and amplification stage in high-speed analog circuits requiring stable DC performance and fast transient response.
For engineers reviewing the LF412MH/NOPB datasheet, LF412MH/NOPB pinout, LF412MH/NOPB application, or LF412MH/NOPB equivalent, key selection considerations include military-grade temperature range (−55°C to +125°C), JFET-input high impedance (10¹² Ω), low 1/f noise corner (50 Hz), and compatibility with legacy LM1558-based designs where enhanced offset and drift performance are required.
Technical Context
The LF412MH/NOPB implements a dual-channel, internally trimmed BI-FET II™ architecture using matched high-voltage JFET input pairs to achieve ultra-low input bias current and minimal offset drift. Each amplifier operates independently with zener-based biasing enabling stable operation down to ±6 V supplies.
Its differential input stage tolerates large common-mode voltages up to the supply rails, with no input clamping diodes required due to inherent JFET gate breakdown robustness. Output drive capability supports ±10 V into 2 kΩ loads across the full military temperature range, while maintaining ≤0.02% THD at 20 VP-P over 20 Hz–20 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1 mV (max) - enables accurate DC-coupled amplification without manual nulling in precision sensor interfaces. |
| Offset Drift | 7 µV/°C (typ) - ensures <±100 µV total drift over −55°C to +125°C, critical for unattended industrial instrumentation. |
| Input Bias Current | 50 pA (typ at 25°C) - preserves signal integrity in high-impedance photodiode or piezoelectric sensor front-ends. |
| Gain-Bandwidth Product | 3 MHz (min) - supports closed-loop gains up to 30 at 100 kHz, suitable for anti-aliasing and reconstruction filters. |
| Slew Rate | 10 V/µs (min) - allows clean 10 V step response within 1 µs, essential for fast D/A converter output buffering. |
| Input Impedance | 10¹² Ω - minimizes loading error on passive RC networks and high-Z transducer outputs. |
| THD | ≤0.02% - meets audio-grade line driver and test equipment requirements without post-amplifier correction. |
Pinout & Package
LF412MH/NOPB uses a hermetically sealed TO-99 metal can package (9.14 mm diameter), rated for military temperature operation (−55°C to +125°C) and offering superior thermal dissipation (θJA = 152°C/W) and EMI immunity versus plastic packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output node; capable of ±10 V swing into 2 kΩ load across full temperature range. |
| 2 | Inverting Input A | Differential input terminal for Amplifier A; accepts common-mode voltages up to supply rails. |
| 3 | Non-Inverting Input A | Differential input terminal for Amplifier A; matched to Pin 2 for optimal CMRR (≥70 dB). |
| 4 | V− | Negative supply connection; must not be exceeded by either input voltage to prevent phase reversal. |
| 5 | Non-Inverting Input B | Differential input terminal for Amplifier B; electrically isolated but thermally coupled to Amplifier A. |
| 6 | Inverting Input B | Differential input terminal for Amplifier B; shares same trimming and matching characteristics as Pins 2–3. |
| 7 | Output B | Amplifier B output node; fully independent operation with identical AC/DC specs to Output A. |
| 8 | V+ | Positive supply connection; supports ±6 V to ±15 V operation; requires local 0.1 µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| BI-FET II™ Trimmed Inputs | Factory-trimmed JFET pair delivers guaranteed 1 mV max VOS and 7 µV/°C drift without external nulling circuitry. |
| JFET Input Stage | 10¹² Ω input resistance and 50 pA bias current enable direct interfacing with megohm-level sensor sources. |
| Military Temperature Range | Rated for −55°C to +125°C operation in TO-99 package, supporting aerospace, defense, and downhole applications. |
| Low 1/f Noise Corner | 50 Hz corner frequency ensures minimal low-frequency noise in precision integrators and strain gauge amplifiers. |
| LM1558 Pin Compatibility | Direct drop-in replacement for LM1558 in existing layouts, enabling immediate performance upgrade without PCB revision. |
Applications
| High-Speed Sample-and-Hold | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Capturing fast-changing analog signals in data acquisition systems with sub-microsecond aperture time. IC Role / Device Role / Timing Role: Dual op-amp configured as unity-gain buffer and precision hold amplifier; LF412MH/NOPB provides low droop (<0.01%/ms) and fast settling (2 µs to 0.01%). Use Value: Enables 12-bit+ resolution sampling at >100 kSPS without external zero-drift correction or chopper stabilization. | Use Scenario: Amplifying low-level Wheatstone bridge outputs from load cells and pressure sensors in industrial weighing systems. IC Role / Device Role / Timing Role: Instrumentation-grade front-end amplifier with matched inputs and low drift; LF412MH/NOPB rejects common-mode noise while preserving microvolt-level bridge imbalance. Use Value: Delivers <±2 µV/°C system offset drift over temperature, eliminating need for frequent recalibration in field-deployed equipment. |
| Fast D/A Converter Buffer | High-Voltage Integrator |
Use Scenario: Driving capacitive loads in high-resolution DAC output stages for waveform generation and servo control. IC Role / Device Role / Timing Role: Unity-gain stable buffer isolating DAC output from reactive loads; LF412MH/NOPB maintains 10 V/µs slew rate into 100 pF + 2 kΩ. Use Value: Prevents settling errors and overshoot in 16-bit DAC systems, ensuring monotonicity and <1 LSB integral nonlinearity. | Use Scenario: Precision analog integration in PID controllers and energy metering ICs requiring long time constants and low drift. IC Role / Device Role / Timing Role: Integrator core with JFET-input minimizing leakage-induced drift; LF412MH/NOPB achieves <0.1 mV/s output drift at 1 V input. Use Value: Supports 100-second integration windows with <0.5% error accumulation, replacing discrete FET+op-amp solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LF412CN/NOPB | Same die, commercial temp range (0°C to 70°C), PDIP-8 package, 3 mV max VOS. | Limited to benign environments; unsuitable for extended temperature or hermetic requirements. | Select when cost sensitivity outweighs military temp or EMI immunity needs. |
| TL072CP | Lower cost BiFET op-amp; 10 mV max VOS, 15 µV/°C drift, no military temp option. | Higher offset/drift limits use in precision DC-coupled paths; lacks TO-99 reliability pedigree. | Choose for general-purpose AC-coupled amplification where absolute accuracy is secondary. |
Compared with LF412CN/NOPB, LF412MH/NOPB adds −55°C to +125°C operation, hermetic sealing, and tighter offset spec-justifying its use in mission-critical analog signal chains. Versus TL072CP, it trades cost for guaranteed low-drift performance and rugged packaging, making it irreplaceable in calibrated instrumentation.
Availability
LF412MH/NOPB is available at Aetrix Electronics and suitable for high-reliability aerospace avionics, downhole oilfield sensors, and military communications equipment requiring stable component supply across extended temperature and lifecycle demands.
Supply support for LF412MH/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, embedded processing, and digital signal technologies, with decades of heritage in precision op-amp design and military-grade component qualification.
The LF412 series belongs to TI's legacy high-reliability analog portfolio, engineered specifically for demanding applications requiring JFET-input performance, wide temperature operation, and long-term parametric stability without calibration.
FAQ
What is the maximum operating temperature range for LF412MH/NOPB?
The LF412MH/NOPB is specified for continuous operation from −55°C to +125°C, validated per military-grade testing protocols and packaged in a hermetically sealed TO-99 metal can to ensure reliability under thermal shock and extended environmental stress. This rating is intrinsic to the LF412MH/NOPB part number and confirmed in TI's SNOSBH7F datasheet Section 6.3.
Does LF412MH/NOPB require external offset nulling circuitry?
No, LF412MH/NOPB does not require external offset nulling. Its BI-FET II™ internal trimming guarantees ≤1 mV input offset voltage at 25°C and ≤7 µV/°C drift, eliminating the need for potentiometers or calibration loops in most precision applications. This specification is explicitly verified for the LF412MH/NOPB variant in the datasheet's DC Electrical Characteristics table.
Can LF412MH/NOPB operate from a single +12 V supply?
Yes, LF412MH/NOPB supports single-supply operation, including +12 V, provided the input common-mode voltage remains within the specified range (e.g., ≥2 V above V− and ≤3 V below V+). The datasheet confirms functionality down to ±6 V total supply, so +12 V/0 V is viable with appropriate level-shifting and output swing constraints. This behavior applies directly to the LF412MH/NOPB device.
Is LF412MH/NOPB pin-compatible with LM1558?
Yes, LF412MH/NOPB is pin-compatible with LM1558 in the TO-99 package configuration, enabling direct replacement in legacy designs. TI's datasheet explicitly states this compatibility and confirms identical pin functions (Pins 1–8) between LF412-N and LM1558. This applies to the LF412MH/NOPB variant as confirmed in the Device Information table.
What is the input noise current specification for LF412MH/NOPB?
The LF412MH/NOPB has an input noise current of 0.01 pA/√Hz at 1 kHz, measured per standard AC Electrical Characteristics methodology in the TI SNOSBH7F datasheet. This ultra-low value stems from its JFET input structure and is consistent across all LF412 variants including LF412MH/NOPB, enabling high-fidelity amplification of low-current sources like photodiodes.
LF412MH/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 15V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 3.6mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
LF412MH/NOPB FAQ
1.How can I place an order for LF412MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LF412MH/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 LF412MH/NOPB reliable?
The price and inventory of LF412MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF412MH/NOPB is usually 5 days.
3.What payment methods are accepted for LF412MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF412MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF412MH/NOPB?
LF412MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF412MH/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 LF412MH/NOPB?
For technical support, including LF412MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF412MH/NOPB requirements.
6.How does Aetrix verify that LF412MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LF412MH/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 LF412MH/NOPB meets industry standards.
7.What is the process for return or replacement of LF412MH/NOPB?
All LF412MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LF412MH/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 LF412MH/NOPB part is unused and in its original packaging.
Return procedure for LF412MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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