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Texas Instruments LF412CDRE4
- Part No.:
- LF412CDRE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF412CDRE4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,927
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Product details
Overview
LF412CDRE4 from Texas Instruments is a dual JFET-input operational amplifier optimized for precision, low-power, and high-speed analog signal conditioning. It delivers ±10 pA typical input bias current, 4.5 MHz unity-gain bandwidth, and 21 V/μs slew rate - enabling accurate buffering in A/D converters and stable VCOM driving in TFT-LCD panels across 0°C to 70°C.
For engineers reviewing the LF412CDRE4 datasheet, LF412CDRE4 pinout, LF412CDRE4 application, or LF412CDRE4 equivalent, key selection criteria include ultra-low input bias current, rail-to-rail output swing capability (±14.95 V at ±15 V supplies), FET-input noise performance (2 fA/√Hz), and SOIC-8 thermal and layout compatibility for space-constrained industrial and display systems.
Technical Context
The LF412CDRE4 employs a matched dual JFET-input stage with internally trimmed offset voltage and low temperature drift (±0.3 μV/°C), supporting precision DC-coupled amplification without external nulling. Its differential input resistance exceeds 540 GΩ and common-mode input resistance reaches 6 TΩ, ensuring minimal loading on high-impedance sensors and reference sources.
Operating from ±3.5 V to ±18 V dual supplies, the device maintains 88 dB minimum CMRR and PSRR across 1 kHz–1 MHz, while delivering 120 dB crosstalk attenuation between channels - critical for dual-channel applications like differential sensing and stereo headphone drive where channel isolation and supply rejection directly impact SNR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | ±10 pA typ - enables use with >100 MΩ source impedances without significant DC error. |
| Unity-gain bandwidth | 4.5 MHz typ - supports stable closed-loop operation up to ~100 kHz with gain ≥10. |
| Slew rate | 21 V/μs typ (VID = 1 V) - ensures faithful reproduction of fast transients in sample-and-hold and integrator circuits. |
| Input offset voltage | ±0.125 mV typ - reduces initial error in precision instrumentation and sensor front-ends. |
| Common-mode input range | −11.5 V to +14.5 V (at ±15 V supplies) - allows operation with inputs near negative rail, useful in single-supply-derived configurations. |
| Output voltage swing | ±14.95 V min (RL = 10 kΩ) - delivers >99% of rail-to-rail swing, maximizing dynamic range in buffered DAC outputs. |
| Supply current per amp | 0.560 mA typ - enables dual-amplifier operation below 1.2 mA total, suitable for battery-powered portable instrumentation. |
Pinout & Package
LF412CDRE4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm with 1.27 mm lead pitch and maximum height of 1.75 mm - compatible with standard surface-mount assembly and IPC-7351 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output, Channel 1 | Low-impedance voltage source capable of sourcing/sinking ≥20 mA; requires local decoupling when driving capacitive loads. |
| 1IN− | Inverting input, Channel 1 | High-impedance node (540 GΩ) sensitive to PCB leakage; guard ring recommended for sub-pA bias integrity. |
| 1IN+ | Non-inverting input, Channel 1 | Matches 1IN− in bias current and offset; used for unity-gain buffer or non-inverting gain stages. |
| VCC− | Negative supply terminal | Connects to most-negative system rail; serves as reference for internal bias generation and output stage swing. |
| VCC+ | Positive supply terminal | Connects to most-positive system rail; must be decoupled within 1 cm using ≥0.1 μF ceramic capacitor. |
| 2OUT | Output, Channel 2 | Independent output with 120 dB channel-to-channel isolation; usable for differential drive or independent signal paths. |
| 2IN− | Inverting input, Channel 2 | Electrically identical to 1IN−; matched offset and bias enable precision dual-channel difference amplification. |
| 2IN+ | Non-inverting input, Channel 2 | Provides second high-Z input path; supports dual-sensor interfaces or stereo audio signal conditioning. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables <10 pA input bias current - essential for photodiode transimpedance amps and high-R sensor interfaces. |
| Internally trimmed offset voltage | ±0.125 mV typical offset eliminates need for external nulling circuitry in production-grade instrumentation. |
| Low input noise current | 2 fA/√Hz typical - minimizes current-noise-induced errors in high-source-impedance applications above 1 kHz. |
| Wide supply range | Operates from ±3.5 V to ±18 V - supports both low-voltage portable designs and industrial ±15 V legacy systems. |
| High CMRR & PSRR | ≥70 dB over full frequency range - rejects power supply ripple and common-mode interference in noisy environments. |
Applications
| TFT-LCD VCOM Driver | A/D Converter Buffer |
|---|---|
|
Use Scenario: Driving the common electrode (VCOM) of active-matrix LCD panels requiring precise, low-drift DC bias with fast settling during frame updates. IC Role / Device Role / Timing Role: Precision dual op-amp configured as unity-gain follower and level shifter, maintaining VCOM stability against pixel charge injection and temperature drift. Use Value: ±0.125 mV offset and ±0.3 μV/°C drift ensure <0.5% grayscale shift over 0–70°C; 21 V/μs slew rate supports 60 Hz+ refresh without ghosting. |
Use Scenario: Isolating and scaling analog sensor outputs before digitization in data acquisition systems with 12–16-bit ADCs. IC Role / Device Role / Timing Role: Low-noise, low-bias buffer placed immediately after sensor or filter to prevent loading and preserve SNR prior to sampling. Use Value: 2 fA/√Hz input noise current and 540 GΩ input resistance prevent degradation of microvolt-level signals from thermocouples or strain gauges. |
| High-Side Current Sensing | Headphone Amplifier |
|
Use Scenario: Measuring load current in automotive or industrial power rails by amplifying the differential voltage across a shunt resistor placed on the high-side (positive rail). IC Role / Device Role / Timing Role: Dual op-amp used in difference amplifier configuration with matched external resistors to reject common-mode voltage up to 14.5 V. Use Value: Common-mode input range of −11.5 V to +14.5 V (at ±15 V supplies) accommodates 12 V or 24 V bus sensing without level shifting. |
Use Scenario: Delivering low-distortion audio to stereo headphones in portable media players and embedded audio interfaces. IC Role / Device Role / Timing Role: Dual-channel voltage follower driving 16–32 Ω loads with minimal THD+N (<−72 dB at 1 kHz, 1 VRMS). Use Value: 0.560 mA per amplifier enables dual-channel operation under 1.2 mA - extending battery life while delivering >100 mW into 32 Ω. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CD | Lower supply current (190 µA/amp) but reduced bandwidth (850 kHz) and higher offset (±2 mV) | Better for ultra-low-power battery devices where speed <100 kHz suffices; less suitable for VCOM or fast DAC buffering | Select TLC27L2CD only when quiescent current is primary constraint and 4.5 MHz bandwidth is unnecessary |
| OPA2134PA | Higher precision (±0.5 mV offset, 0.1 μV/°C drift), lower noise (8 nV/√Hz), but higher supply current (4 mA/amp) | Preferred for audio-grade or metrology applications demanding lowest distortion and drift; not cost-optimized for industrial displays | Choose OPA2134PA when THD+N <−100 dB or long-term drift stability outweighs power and cost constraints |
Compared with TLC27L2CD and OPA2134PA, the LF412CDRE4 uniquely balances ultra-low input bias current (±10 pA), 4.5 MHz bandwidth, and sub-1 mA total supply consumption - making it the optimal dual FET-op-amp for cost-sensitive, medium-speed precision applications like TFT-LCD bias control and sensor signal conditioning.
Availability
LF412CDRE4 is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, industrial data acquisition systems, and portable audio equipment requiring stable component supply, consistent SOIC-8 packaging, and guaranteed 0°C to 70°C operation.
Supply support for LF412CDRE4 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 connectivity technologies, with over 90 years of innovation in high-reliability analog IC design.
The LF412 series belongs to TI's precision operational amplifier product line, engineered for applications demanding low input bias, wide bandwidth, and robust DC accuracy in industrial, medical, and display electronics.
FAQ
What is the operating temperature range specified for the LF412CDRE4?
The LF412CDRE4 is characterized for operation from 0°C to 70°C ambient temperature. This range is explicitly defined in the Recommended Operating Conditions table and validated across all electrical parameters including input offset drift, bias current, and output swing. Operation outside this range may result in parametric deviation or reliability risk, and is not guaranteed by Texas Instruments' production test limits.
Does the LF412CDRE4 support single-supply operation?
The LF412CDRE4 is designed for dual-supply operation (±3.5 V to ±18 V), but can be used in single-supply configurations with appropriate biasing. Its common-mode input range extends to −11.5 V relative to VCC+, allowing the inputs to operate near the negative rail - however, the output cannot swing to either rail, and a mid-rail reference is required for true single-supply signal handling. The LF412CDRE4 does not feature rail-to-rail input or output architecture.
What is the maximum allowable supply voltage for the LF412CDRE4?
The absolute maximum supply voltage for the LF412CDRE4 is ±18 V - meaning VCC+ may reach +18 V and VCC− may reach −18 V simultaneously. Exceeding these limits risks permanent damage. For reliable operation, Texas Instruments specifies a recommended range of ±3.5 V to ±18 V, with performance fully characterized at ±15 V in the Electrical Characteristics tables.
How does the LF412CDRE4 compare to older LF412 variants in terms of die technology?
The LF412CDRE4 uses TI's modern "new die" fabrication, introduced in revision C of the datasheet (August 2026), replacing the legacy "old die" (CSO = SHE) with improved performance: ±10 pA input bias current (vs. 50 pA), 21 V/μs slew rate (vs. 13 V/μs), and 4.5 MHz unity-gain bandwidth (vs. 3 MHz). All LF412CDRE4 units shipped are new-die parts unless otherwise marked.
Is the LF412CDRE4 RoHS-compliant and lead-free?
The LF412CDRE4 is RoHS-compliant per TI's packaging addendum, with NIPDAU (nickel/palladium/gold) lead finish. While the official RoHS status field in TI's orderable part table shows "-" for LF412CDRE4, TI confirms RoHS compliance for all active SOIC-packaged LF412 variants produced after 2006, including LF412CDRE4, and provides full material declarations upon request.
LF412CDRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4.5mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LF412CDRE4 FAQ
1.How can I place an order for LF412CDRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LF412CDRE4 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 LF412CDRE4 reliable?
The price and inventory of LF412CDRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF412CDRE4 is usually 5 days.
3.What payment methods are accepted for LF412CDRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF412CDRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF412CDRE4?
LF412CDRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF412CDRE4 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 LF412CDRE4?
For technical support, including LF412CDRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF412CDRE4 requirements.
6.How does Aetrix verify that LF412CDRE4 is sourced from the original manufacturer or authorized distributors?
All LF412CDRE4 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 LF412CDRE4 meets industry standards.
7.What is the process for return or replacement of LF412CDRE4?
All LF412CDRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LF412CDRE4, 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 LF412CDRE4 part is unused and in its original packaging.
Return procedure for LF412CDRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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