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Texas Instruments LF411CDRG4
- Part No.:
- LF411CDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF411CDRG4.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
LF411CDRG4 from Texas Instruments is a FET-input operational amplifier optimized for high-speed precision analog signal conditioning, featuring 50 pA typical input bias current, 2 fA/√Hz typical input noise current, and 0.5 V/µs typical slew rate at ±15 V supply. It operates across 0°C to 70°C and delivers ±14.95 V peak output swing into 10 kΩ, making it suitable for fast DAC buffering and sample-and-hold circuits in test equipment and data acquisition systems.
For engineers reviewing the LF411CDRG4 datasheet, LF411CDRG4 pinout, LF411CDRG4 application, or LF411CDRG4 equivalent, key selection criteria include ultra-low input bias current for high-impedance sensor interfaces, low noise current for photodiode amplification, stable unity-gain bandwidth of 4.5 MHz, and SOIC-8 packaging compatible with automated SMT assembly.
Technical Context
The LF411CDRG4 employs a matched high-voltage FET input stage enabling 10¹² Ω typical input resistance and sub-nA input bias currents over temperature. Its internal compensation ensures unity-gain stability without external components while maintaining 4.5 MHz bandwidth and 25 V/mV large-signal voltage gain.
Designed for single- or dual-supply operation (±3.5 V to ±18 V), it supports rail-to-rail input common-mode range (±11 V) and delivers low THD in integrator and active filter topologies. The device exhibits 10.8 nV/√Hz input voltage noise at 1 kHz and 2 fA/√Hz input current noise - critical for low-level signal amplification where source impedance exceeds 1 MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | 50 pA typical - enables accurate amplification of signals from high-impedance sources like piezoelectric sensors or pH electrodes |
| Unity-gain bandwidth | 4.5 MHz - supports stable closed-loop operation up to ~100 kHz in precision integrators without phase margin loss |
| Slew rate | 0.5 V/µs - sufficient for settling 10 V steps within 20 µs, meeting timing requirements in 12-bit DAC buffer applications |
| Input offset voltage | 2 mV max at 25°C - limits DC error to <0.02% of full-scale in 10 V-range instrumentation circuits |
| Common-mode input range | ±11 V - allows direct interfacing with bipolar ±10 V industrial analog I/O without level-shifting circuitry |
| Supply current | 560 µA typical - enables low-power operation in battery-backed data loggers while retaining speed and precision |
| Input noise current | 2 fA/√Hz typical - minimizes current-noise-induced voltage error in transimpedance amplifiers with >1 GΩ feedback resistors |
Pinout & Package
LF411CDRG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, 3.9 mm width, and 1.75 mm max height - compliant with JEDEC MS-012AA and optimized for reflow soldering in high-volume PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connection - must remain unconnected to avoid parasitic coupling or latch-up risk |
| 2 | IN– | Inverting input - accepts feedback network for stable closed-loop gain configurations |
| 3 | IN+ | Non-inverting input - provides high-impedance path for reference or sensor signals |
| 4 | VCC– | Negative power supply - requires low-impedance decoupling near pin to suppress ground bounce in fast transient response |
| 5 | NC | No connection - electrically isolated; no internal bond wire or die connection |
| 6 | OUT | Amplified output - drives loads ≥10 kΩ directly; lower impedances require external buffering to maintain slew rate |
| 7 | VCC+ | Positive power supply - must be decoupled with 0.1 µF ceramic capacitor to minimize supply-induced distortion |
| 8 | NC | No connection - floating terminal; no internal function or thermal tie |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables 10¹² Ω input resistance and 50 pA input bias current - critical for electrometer-grade signal integrity |
| Low input noise current | 2 fA/√Hz at 1 kHz - reduces Johnson noise contribution in high-Z photodiode or ion-selective electrode amplifiers |
| Stable unity-gain operation | Internally compensated for unconditional stability without external capacitors - simplifies layout in space-constrained designs |
| Wide supply range | ±3.5 V to ±18 V operation - supports legacy ±15 V industrial systems and modern low-voltage portable instrumentation |
| High CMRR & PSRR | 70 dB minimum common-mode and supply rejection - maintains accuracy in noisy factory-floor environments |
Applications
| High-Speed Integrator | Digital-to-Analog Converter (DAC) Buffer |
|---|---|
|
Use Scenario: Precision ramp generation in function generators and waveform synthesizers requiring linear integration over 10 ms to 1 s intervals. IC Role / Device Role / Timing Role: Integrator op-amp with low input bias current minimizing capacitor leakage-induced drift and ensuring <0.1% linearity error. Use Value: 50 pA input bias current limits integration error to <1 µV/s in 1 µF–10 MΩ configurations, enabling 16-bit-equivalent resolution over 100 ms windows. |
Use Scenario: Isolating and driving the output of 12-bit current-steering DACs in automated test equipment where load capacitance exceeds 100 pF. IC Role / Device Role / Timing Role: Unity-gain buffer with 0.5 V/µs slew rate and ±14.95 V output swing, ensuring monotonic settling within 20 µs after DAC code transitions. Use Value: Low 2 fA/√Hz input noise current prevents degradation of DAC SNR when driving high-impedance ladder networks or coaxial cables. |
| Sample-and-Hold Circuit | Photodiode Transimpedance Amplifier |
|
Use Scenario: Capturing transient analog signals in oscilloscopes and spectrum analyzers with aperture uncertainty <1 ns at 100 kHz sampling rates. IC Role / Device Role / Timing Role: Hold amplifier with low input bias current and high input impedance preserving charge on hold capacitors during acquisition phases. Use Value: 10¹² Ω input resistance extends hold time constant to >10 s on 10 pF capacitors, reducing droop to <0.01% per second. |
Use Scenario: Converting weak photocurrents (100 pA–10 nA) from UV/visible photodiodes into measurable voltage outputs in spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias and noise current to maximize dynamic range without saturating on dark current. Use Value: 2 fA/√Hz input noise current enables detection of 500 pA signals with >60 dB SNR using 1 GΩ feedback resistors at 1 kHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CDR | Lower supply current (125 µA typ), but reduced slew rate (0.045 V/µs) and bandwidth (110 kHz) | Better for ultra-low-power battery operation; unsuitable for >10 kHz integrators or DAC buffering | Select when power budget <200 µA dominates over speed and noise performance |
| OPA140AIDR | Higher precision (125 µV VIO max), lower noise (5.1 nV/√Hz), but higher cost and 1.8 mA supply current | Preferred for metrology-grade instrumentation; over-spec'd for general-purpose sample-and-hold | Select when offset drift <1 µV/°C and 16-bit+ DC accuracy are mandatory |
Compared with TLC27L2CDR and OPA140AIDR, the LF411CDRG4 uniquely balances 4.5 MHz bandwidth, 50 pA input bias, and 560 µA supply current in a cost-optimized SOIC-8 package - making it the optimal choice for mid-speed precision analog front-ends where thermal and layout constraints preclude higher-power alternatives.
Availability
LF411CDRG4 is available at Aetrix Electronics and suitable for high-speed integrators, DAC buffers, sample-and-hold circuits, and photodiode amplifiers requiring stable component supply across industrial and test equipment production cycles.
Supply support for LF411CDRG4 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 90 years of innovation in precision amplifiers and signal-chain solutions.
The LF411 series was developed to deliver high-speed FET-input performance at low cost for industrial instrumentation, test equipment, and data acquisition - bridging the gap between legacy JFET op-amps and modern low-power precision devices.
FAQ
What is the operating temperature range for the LF411CDRG4?
The LF411CDRG4 is characterized for operation from 0°C to +70°C ambient temperature. This commercial-grade specification aligns with its "C" suffix designation and makes it suitable for indoor industrial control panels, benchtop test instruments, and non-automotive embedded systems where extended temperature operation is not required. The LF411CDRG4 does not meet automotive AEC-Q200 or extended industrial (–40°C to +85°C) requirements.
Does the LF411CDRG4 require external compensation for unity-gain stability?
No, the LF411CDRG4 is internally compensated and stable at unity gain without external components. Its design incorporates dominant-pole compensation optimized for 4.5 MHz unity-gain bandwidth and >60° phase margin under standard load conditions. Adding external compensation capacitors may degrade slew rate and bandwidth unnecessarily unless driving highly capacitive loads (>100 pF) that induce peaking.
What are the recommended decoupling practices for the LF411CDRG4 power pins?
Place a 0.1 µF ceramic capacitor between VCC+ (Pin 7) and VCC– (Pin 4), located within 5 mm of the device. For systems with shared supply rails, add a 10 µF tantalum or aluminum electrolytic capacitor at the board's main power entry point. Avoid shared vias between decoupling paths - each supply pin should have its own low-inductance return path to minimize ground bounce during fast output transitions.
Can the LF411CDRG4 drive a 600 Ω audio line directly?
No, the LF411CDRG4 is not designed for low-impedance line driving. Its output stage is specified for loads ≥10 kΩ; driving 600 Ω causes severe slew rate limiting, increased distortion (>1% THD), and potential thermal overload. For audio line drivers, use purpose-built devices such as the NE5532 or OPA1678. The LF411CDRG4 should interface to 600 Ω loads only via an external buffer stage or transformer coupling.
How does the LF411CDRG4 compare to the LF411CP in terms of performance and layout?
The LF411CDRG4 and LF411CP share identical electrical specifications, pinout, and functional behavior - differing only in package (SOIC-8 vs. PDIP-8) and packaging format (tape-and-reel vs. tube). The LF411CDRG4's SOIC-8 footprint enables higher board density and automated assembly, while the LF411CP's through-hole package suits prototyping and low-volume hand-soldered builds. Thermal resistance differs (197°C/W vs. 104°C/W), so power dissipation must be reviewed per package in thermally constrained designs.
LF411CDRG4 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:
- 1
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 2mA
- 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
LF411CDRG4 FAQ
1.How can I place an order for LF411CDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LF411CDRG4 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 LF411CDRG4 reliable?
The price and inventory of LF411CDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF411CDRG4 is usually 5 days.
3.What payment methods are accepted for LF411CDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF411CDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF411CDRG4?
LF411CDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF411CDRG4 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 LF411CDRG4?
For technical support, including LF411CDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF411CDRG4 requirements.
6.How does Aetrix verify that LF411CDRG4 is sourced from the original manufacturer or authorized distributors?
All LF411CDRG4 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 LF411CDRG4 meets industry standards.
7.What is the process for return or replacement of LF411CDRG4?
All LF411CDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LF411CDRG4, 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 LF411CDRG4 part is unused and in its original packaging.
Return procedure for LF411CDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF411CDRG4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
Texas Instruments
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