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Texas Instruments LF412CDE4
- Part No.:
- LF412CDE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF412CDE4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,634
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Product details
Overview
LF412CDE4 from Texas Instruments is a dual FET-input operational amplifier optimized for precision, low-noise, and low-power applications. It delivers ±10 pA typical input bias current, 4.5 MHz gain bandwidth, 21 V/μs slew rate (VID = 1 V), and operates across 0°C to 70°C. It serves as a VCOM driver in TFT-LCD panels and as a high-impedance buffer in A/D converters.
For engineers reviewing the LF412CDE4 datasheet, LF412CDE4 pinout, LF412CDE4 application, or LF412CDE4 equivalent, key selection criteria include its FET-input architecture enabling ultra-low input current, rail-to-rail output swing capability (±14.95 V at RL = 10 kΩ), and SOIC-8 packaging suitable for space-constrained analog signal chains requiring stability and noise immunity.
Technical Context
The LF412CDE4 employs a matched dual JFET-input stage delivering symmetrical channel performance with internally trimmed offset voltage (±0.125 mV typ) and low drift (±0.3 μV/°C typ). Its high differential input resistance (540 GΩ) and common-mode input resistance (6 TΩ) preserve signal integrity in high-impedance sensor interfaces.
It supports dual-supply operation from ±3.5 V to ±18 V, maintains 120 dB crosstalk attenuation at 1 kHz, and achieves 130 dB large-signal open-loop gain at 25°C - enabling precise closed-loop configurations in integrators, sample-and-hold circuits, and headphone amplifiers without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | ±10 pA typ - enables direct interfacing with high-impedance sources (e.g., photodiodes, piezoelectric sensors) without significant DC error. |
| Gain bandwidth product | 4.5 MHz typ - supports stable unity-gain operation up to ~4.5 MHz and closed-loop bandwidths >1 MHz with moderate gain. |
| Slew rate | 21 V/μs typ (VID = 1 V) - allows fast settling for video-level signals and transient-rich waveforms in VCOM driving and audio buffering. |
| Input offset voltage | ±0.125 mV typ - reduces initial DC error in precision instrumentation and calibration-critical signal conditioning paths. |
| Common-mode input range | −11.5 V to +14.5 V (VCC± = ±15 V) - accommodates wide-swing bipolar inputs while maintaining linear operation near supply rails. |
| Supply current per amp | 0.560 mA typ - enables dual-channel precision amplification in battery-powered or thermally constrained systems without excessive quiescent power. |
| Output voltage swing | ±14.95 V typ (RL = 10 kΩ) - delivers near-rail output drive into moderate loads, minimizing headroom loss in single-supply derived bipolar rails. |
Pinout & Package
LF412CDE4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm with 1.75 mm max height, RoHS-compliant NIPDAU lead finish, and MSL Level-1 rating for unlimited reflow exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output, channel 1 | Low-impedance buffered output capable of sourcing/sinking ≥40 mA (typ), suitable for driving capacitive VCOM lines or ADC reference buffers. |
| 1IN− | Inverting input, channel 1 | Differential input node with 540 GΩ input resistance; requires matched trace impedance for optimal CMRR in inverting configurations. |
| 1IN+ | Non-inverting input, channel 1 | High-impedance node for direct connection to high-Z sources; sensitive to PCB leakage - guard ring recommended. |
| VCC− | Negative supply (lowest potential) | Connects to system ground or negative rail; must be decoupled locally with 0.1 µF ceramic capacitor to suppress PSRR degradation. |
| VCC+ | Positive supply (highest potential) | Accepts up to +18 V; supplies both amplifiers; shared supply rejection improves inter-channel isolation when bypassed properly. |
| 2OUT | Output, channel 2 | Independent output with identical AC/DC specs to 1OUT; enables dual-path signal processing without cross-coupling beyond 120 dB crosstalk. |
| 2IN− | Inverting input, channel 2 | Electrically isolated input node; pin-compatible with 1IN− for mirrored circuit topologies such as dual feedback networks. |
| 2IN+ | Non-inverting input, channel 2 | Matches 1IN+ in bias current and noise performance; supports true differential input stages when paired with 1IN−/1OUT. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables ±10 pA input bias current and 6 TΩ common-mode input resistance - critical for electrometer-grade sensing and charge-integration accuracy. |
| Internally trimmed offset voltage | ±0.125 mV typical offset eliminates need for external nulling circuitry in production-grade instrumentation and medical front-ends. |
| High slew rate (21 V/μs) | Supports full-scale transitions in <50 ns for 1 V step inputs - essential for TFT-LCD VCOM settling and fast-settling DAC buffers. |
| Wide supply range (±3.5 V to ±18 V) | Permits operation from low-voltage portable rails to industrial ±15 V systems without redesigning power delivery or level-shifting. |
| Low input noise current (2 fA/√Hz) | Minimizes current-noise-induced errors in transimpedance amplifiers handling sub-picoamp photocurrents or ion-sensitive measurements. |
Applications
| TFT-LCD VCOM Driver | A/D Converter Buffer |
|---|---|
Use Scenario: Driving the common electrode (VCOM) of active-matrix LCD panels to maintain pixel voltage stability during frame updates. IC Role / Device Role / Timing Role: Precision dual-output op-amp configured as unity-gain follower with low drift and high slew rate to track fast-changing VCOM reference voltages. Use Value: ±0.125 mV offset and 21 V/μs slew rate ensure <1 LSB error in 10-bit grayscale control and eliminate ghosting artifacts in high-refresh-rate displays. | Use Scenario: Isolating and scaling analog sensor outputs before digitization in data acquisition systems. IC Role / Device Role / Timing Role: High-impedance non-inverting buffer between high-Z transducer (e.g., RTD, thermocouple) and SAR ADC input. Use Value: ±10 pA input bias current prevents loading-induced gain error in 100 kΩ+ source impedances; 4.5 MHz GBW supports anti-alias filtering up to ~200 kHz. |
| High-Side Sensing | Headphone Amplifier |
Use Scenario: Measuring load current by amplifying the small voltage drop across a shunt resistor placed on the high-side (positive rail) of a power path. 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: −11.5 V to +14.5 V common-mode input range allows direct interface to 12 V automotive or industrial rails without level shifting or attenuation. | Use Scenario: Delivering low-distortion audio signals to stereo headphone loads in portable media devices. IC Role / Device Role / Timing Role: Dual-channel output driver operating in single-supply mode with virtual ground, providing 21 V/μs transient response for dynamic bass reproduction. Use Value: 0.560 mA per amplifier enables dual-channel audio buffering with <100 µA total quiescent overhead - extending battery life in always-on audio subsystems. |
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 (125 µA/amp), narrower GBW (1.7 MHz), higher input offset (2 mV max), same SOIC-8 package. | Better suited for ultra-low-power battery monitoring; less suitable for VCOM driving or high-speed buffering due to limited slew rate (0.045 V/μs). | Select TLC27L2CD only when microamp-level quiescent current outweighs speed and precision requirements. |
| OPA2134PA | Higher precision (±0.5 mV max offset), lower noise (8 nV/√Hz), higher GBW (8 MHz), but higher supply current (4 mA/amp) and larger SOIC-8 footprint (5.3 mm × 6.2 mm). | Preferred for studio-grade audio and precision test equipment where THD+N < –100 dB matters more than power budget. | Choose OPA2134PA when audio fidelity or metrology-grade DC accuracy justifies increased power and board area. |
Compared with TLC27L2CD and OPA2134PA, the LF412CDE4 uniquely balances ultra-low input bias current, 4.5 MHz bandwidth, and sub-milliwatt per-channel consumption - making it optimal for cost-sensitive, space-constrained TFT-LCD and industrial sensor signal chains where both speed and input impedance are critical.
Availability
LF412CDE4 is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, precision data acquisition systems, and high-side current sensing applications requiring stable component supply across multi-year production cycles.
Supply support for LF412CDE4 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 50 years of innovation in precision amplifiers and power management ICs.
The LF412CDE4 belongs to TI's legacy precision op-amp family designed for industrial, test & measurement, and display electronics - emphasizing low input current, wide supply tolerance, and robust thermal stability across commercial temperature ranges.
FAQ
What is the maximum operating temperature range for the LF412CDE4?
The LF412CDE4 is characterized for operation from 0°C to 70°C, matching the commercial temperature grade. It is not rated for extended industrial (–40°C to +85°C) or automotive use. At 70°C, input bias current rises to 8 nA (max), and offset voltage drift remains within ±0.3 μV/°C typical - ensuring predictable performance in office, lab, and consumer display environments where ambient conditions stay within this band. Always verify thermal derating in high-power-density PCB layouts.
Does the LF412CDE4 support single-supply operation?
Yes, the LF412CDE4 supports single-supply operation when biased appropriately - for example, with VCC+ = +15 V and VCC− = 0 V (ground), using a virtual ground at mid-supply for input referencing. Its common-mode input range extends to −11.5 V to +14.5 V under ±15 V supplies, so with +15 V/0 V, usable common-mode range becomes 0 V to +13.5 V. Output swing reaches ±14.95 V into 10 kΩ, meaning it can deliver ~0.05 V to ~14.95 V in single-supply mode - sufficient for many buffered sensor and DAC interface roles.
What is the pin compatibility status of LF412CDE4 with other LF412 variants?
The LF412CDE4 shares identical pinout and electrical specifications with all LF412x variants in SOIC-8 (D) package, including LF412CDR, LF412CDR1G4, and LF412CDRG4. All adhere to JEDEC MS-012 variation AA mechanical outline and functionally match the D-package pin configuration shown in Figure 4-1. Differences are limited to tape-and-reel packaging, marking, and RoHS compliance - not pin assignment or internal connectivity. No PCB layout changes are required when substituting among these SOIC-8 versions.
How does the "new die" revision affect LF412CDE4 performance?
The LF412CDE4 uses TI's modern "new die" fabrication (CSO = RFB), introduced in Revision C of the datasheet. This die delivers improved specs versus the obsolete "old die" (CSO = SHE): ±10 pA input bias current (vs. ±50 pA), 21 V/μs slew rate (vs. 13 V/μs), 4.5 MHz GBW (vs. 3 MHz), and ±0.125 mV input offset (vs. 1 mV). All LF412CDE4 units shipped post-August 2026 are new-die parts - no mixing or identification required at the component level.
Can LF412CDE4 drive capacitive loads directly, such as LCD VCOM lines?
Yes, the LF412CDE4 is specified to drive capacitive loads up to 100 pF with stable 21 V/μs slew rate (per Section 5.4), making it suitable for direct VCOM line driving in mid-size TFT-LCD panels. For loads exceeding 100 pF, external series resistance (e.g., 10–100 Ω) is recommended at the output to maintain phase margin. The device's high output current capability (~40 mA peak) and low output impedance (<100 Ω) ensure fast settling even with 1–5 nF panel capacitance when combined with proper compensation.
LF412CDE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LF412CDE4 FAQ
1.How can I place an order for LF412CDE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LF412CDE4 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 LF412CDE4 reliable?
The price and inventory of LF412CDE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF412CDE4 is usually 5 days.
3.What payment methods are accepted for LF412CDE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF412CDE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF412CDE4?
LF412CDE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF412CDE4 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 LF412CDE4?
For technical support, including LF412CDE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF412CDE4 requirements.
6.How does Aetrix verify that LF412CDE4 is sourced from the original manufacturer or authorized distributors?
All LF412CDE4 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 LF412CDE4 meets industry standards.
7.What is the process for return or replacement of LF412CDE4?
All LF412CDE4 units undergo pre-shipment inspection (PSI). If there is an issue with LF412CDE4, 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 LF412CDE4 part is unused and in its original packaging.
Return procedure for LF412CDE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF412CDE4 Tags
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