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Texas Instruments LF412CDRG4
- Part No.:
- LF412CDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF412CDRG4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,354
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Product details
Overview
LF412CDRG4 from Texas Instruments is a dual JFET-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 over 0°C to 70°C. It serves as a high-impedance buffer in A/D converters and VCOM drivers for TFT-LCD panels.
For engineers reviewing the LF412CDRG4 datasheet, LF412CDRG4 pinout, LF412CDRG4 application, or LF412CDRG4 equivalent, key selection criteria include its FET-input architecture, rail-to-rail output swing capability (±14.95 V at RL = 10 kΩ), low 0.560 mA per-amplifier supply current, and SOIC-8 packaging compatible with industrial and display timing signal conditioning.
Technical Context
The LF412CDRG4 uses a matched dual JFET-input stage enabling ultra-low input bias and offset currents, internally trimmed for ±0.125 mV max input offset voltage and ±0.3 μV/°C drift. Its high 540 GΩ differential input resistance and 6 TΩ common-mode input resistance support high-impedance sensor interfacing without loading.
It features 130 dB large-signal open-loop gain (25°C), 100 dB CMRR and PSRR across DC–1 MHz, and 2 fA/√Hz input noise current - making it suitable for precision integrators, sample-and-hold circuits, and high-side sensing where leakage and noise must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | ±10 pA typ - enables accurate measurement of nanoamp-level source currents without significant error. |
| Gain bandwidth product | 4.5 MHz typ - supports stable closed-loop operation up to ~400 kHz with unity-gain stability. |
| Slew rate | 21 V/μs typ (VID = 1 V) - allows fast settling for video-rate or pulse-based analog signals. |
| Input offset voltage | ±0.125 mV typ - reduces DC error in precision amplification and instrumentation front-ends. |
| Supply current per amp | 0.560 mA typ - enables dual-channel operation below 1.2 mA total, ideal for battery-powered systems. |
| Common-mode range | −11.5 V to +14.5 V (±15 V supplies) - accommodates wide dynamic input signals near supply rails. |
| Output voltage swing | ±14.95 V min (RL = 10 kΩ) - delivers >99% of rail-to-rail swing for maximum dynamic range. |
Pinout & Package
LF412CDRG4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm with 1.27 mm lead pitch and 1.75 mm max height. The package is RoHS-compliant, tape-and-reel packaged (2500 units/reel), and rated MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output, channel 1 | Low-impedance buffered output capable of sourcing/sinking ≥40 mA (typical short-circuit current). |
| 1IN− | Inverting input, channel 1 | Differential input node with 540 GΩ resistance; sensitive to PCB leakage and guarding requirements. |
| 1IN+ | Non-inverting input, channel 1 | High-impedance node requiring symmetric layout and guard traces to minimize offset drift. |
| VCC− | Negative supply rail | Connects to lowest potential (e.g., −15 V); sets lower common-mode limit and output swing floor. |
| VCC+ | Positive supply rail | Connects to highest potential (e.g., +15 V); defines upper common-mode and output swing ceiling. |
| 2OUT | Output, channel 2 | Independent output with crosstalk attenuation >120 dB at 1 kHz - enables dual-channel isolation. |
| 2IN− | Inverting input, channel 2 | Matched to channel 1 for common-mode rejection; shares same bias current specs and noise performance. |
| 2IN+ | Non-inverting input, channel 2 | Electrically identical to 1IN+; supports independent dual-amplifier configurations without interaction. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables ±10 pA input bias current - critical for photodiode, piezoelectric, or high-R sensor interfaces. |
| Internally trimmed offset | Guarantees ±0.125 mV input offset voltage - eliminates need for external nulling circuitry in precision DC apps. |
| Low-noise current density | 2 fA/√Hz input noise current - preserves SNR in high-source-impedance transimpedance amplifiers. |
| Wide common-mode range | −11.5 V to +14.5 V on ±15 V supplies - supports direct connection to unbuffered DAC outputs or shunt monitors. |
| High open-loop gain | 130 dB (25°C) - ensures <0.001% gain error in 100× closed-loop configurations. |
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 and reduce flicker. IC Role / Device Role / Timing Role: Precision DC buffer amplifying reference voltage with minimal drift and load-induced error. Use Value: Low 0.3 μV/°C offset drift and ±10 pA bias current prevent VCOM voltage drift across temperature, directly improving display grayscale uniformity. | Use Scenario: Isolating and scaling analog sensor outputs before sampling by successive-approximation or sigma-delta ADCs. IC Role / Device Role / Timing Role: High-impedance unity-gain follower preventing ADC input loading and maintaining signal integrity during acquisition. Use Value: 540 GΩ input resistance avoids attenuation of high-Z sources (e.g., thermocouples, pH electrodes), preserving full-scale resolution. |
| High-Side Current Sensing | Headphone Amplifier |
Use Scenario: Measuring load current via a series shunt resistor placed between supply and load (e.g., motor, LED string). IC Role / Device Role / Timing Role: Difference amplifier configured with matched external resistors to reject common-mode supply noise. Use Value: 100 dB CMRR ensures accurate current readout despite supply ripple up to 100 mVpp at 100 kHz. | Use Scenario: Delivering low-distortion audio drive to 16–32 Ω headphone loads in portable media devices. IC Role / Device Role / Timing Role: Single-supply-capable output stage driving capacitive loads with controlled phase margin. Use Value: 21 V/μs slew rate supports 20 kHz full-scale square-wave response with <0.1% overshoot into 32 Ω + 100 pF. |
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 |
|---|---|---|---|
| TLC27L2CDR | Lower supply current (125 µA/amp), but only 1.7 MHz GBW and 0.03 V/μs slew rate. | Better for ultra-low-power battery monitoring; unsuitable for video-rate or fast-settling apps. | Select when power budget <250 µA total and bandwidth <100 kHz suffices. |
| OPA2134PA | Higher precision (±0.5 mV VIO max), lower noise (8 nV/√Hz), but 2.2 mA/amp supply current. | Preferred for audio-grade THD+N (<0.00008%) and low-voltage single-supply designs. | Choose when SNR >110 dB and distortion performance outweigh power constraints. |
Compared with TLC27L2CDR and OPA2134PA, the LF412CDRG4 uniquely balances sub-1 mA total supply current, 4.5 MHz bandwidth, and ±10 pA bias current - making it optimal for cost-sensitive, medium-speed precision analog signal chains where leakage and power co-constrain design.
Availability
LF412CDRG4 is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, industrial data acquisition systems, and portable audio equipment requiring stable component supply and long-term production continuity.
Supply support for LF412CDRG4 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 delivering analog, embedded processing, and digital signal solutions for industrial, automotive, and consumer markets.
The LF412 product line was designed for precision analog signal conditioning in cost-sensitive, medium-bandwidth applications - emphasizing low input bias current, wide supply range, and robust SOIC packaging for mainstream manufacturing.
FAQ
What is the operating temperature range specified for the LF412CDRG4?
The LF412CDRG4 is characterized for operation from 0°C to 70°C ambient temperature. This commercial-grade rating aligns with its intended use in non-automotive, non-military applications such as display drivers and industrial instrumentation. The device's input offset drift (±0.3 μV/°C) and bias current behavior are guaranteed across this full range, and thermal derating of power dissipation applies above 70°C.
Does the LF412CDRG4 support single-supply operation?
Yes, the LF412CDRG4 supports single-supply operation with VCC+ referenced to ground and VCC− tied to ground (or a negative rail generated via charge pump). Its common-mode input range extends to within 1.5 V of either rail, and output swing reaches within 50 mV of each supply under light load. For true rail-to-rail input/output, external level-shifting or a dedicated RRIO op-amp is required - the LF412CDRG4 is not RRIO.
What is the maximum supply voltage rating for the LF412CDRG4?
The absolute maximum supply voltage rating for the LF412CDRG4 is ±18 V (i.e., VCC+ ≤ +18 V, VCC− ≥ −18 V). However, the recommended operating condition specifies ±3.5 V to ±18 V. Operation at ±18 V is permissible but increases quiescent current and thermal stress; for most applications, ±15 V provides optimal trade-off between output swing, power, and reliability. Exceeding ±18 V risks permanent damage.
How does the LF412CDRG4 differ from older LF412 variants like the LF412CP?
The LF412CDRG4 uses TI's modern "new die" fabrication with improved parameters: ±10 pA input bias current (vs. ±50 pA old die), 21 V/μs slew rate (vs. 13 V/μs), and ±0.125 mV input offset voltage (vs. 1 mV). Both share identical SOIC-8 pinout and electrical compatibility, but the new die (CSO = RFB) offers tighter specifications and enhanced consistency across temperature - confirmed in revision C of the SLOS010C datasheet.
Is the LF412CDRG4 suitable for driving capacitive loads such as LCD panel electrodes?
Yes - the LF412CDRG4 exhibits stable phase margin into ≥100 pF loads when properly compensated (e.g., with a 10–47 Ω series resistor at the output). Its 4.5 MHz GBW and 21 V/μs slew rate enable fast settling for VCOM updates in 60 Hz–240 Hz refresh-rate displays. Application note SLOA060 confirms stable operation into 200 pF with minor peaking; for >500 pF, external compensation is advised to avoid oscillation.
LF412CDRG4 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
LF412CDRG4 FAQ
1.How can I place an order for LF412CDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LF412CDRG4 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 LF412CDRG4 reliable?
The price and inventory of LF412CDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF412CDRG4 is usually 5 days.
3.What payment methods are accepted for LF412CDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF412CDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF412CDRG4?
LF412CDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF412CDRG4 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 LF412CDRG4?
For technical support, including LF412CDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF412CDRG4 requirements.
6.How does Aetrix verify that LF412CDRG4 is sourced from the original manufacturer or authorized distributors?
All LF412CDRG4 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 LF412CDRG4 meets industry standards.
7.What is the process for return or replacement of LF412CDRG4?
All LF412CDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LF412CDRG4, 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 LF412CDRG4 part is unused and in its original packaging.
Return procedure for LF412CDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF412CDRG4 Tags
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LM358DR
Texas Instruments
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM358P
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