My Inquiry
My Account
Texas Instruments LF412CPG4
- Part No.:
- LF412CPG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LF412CPG4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,313
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LF412CPG4 from Texas Instruments is a dual JFET-input operational amplifier optimized for precision, low-noise, and low-power analog signal conditioning in industrial and consumer systems. 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 - enabling use in TFT-LCD VCOM drivers and high-side sensing circuits.
For engineers reviewing the LF412CPG4 datasheet, LF412CPG4 pinout, LF412CPG4 application, or LF412CPG4 equivalent, key selection criteria include its FET-input architecture for ultra-low input current, rail-to-rail output swing capability (±14.95 V at RL = 10 kΩ), and compatibility with ±3.5 V to ±18 V dual-supply operation.
Technical Context
The LF412CPG4 integrates two matched JFET-input amplifiers on a single die, featuring internally trimmed input offset voltage (±0.125 mV typ) and low drift (±0.3 μV/°C typ). Its differential input resistance exceeds 540 GΩ and common-mode input resistance reaches 6 TΩ, supporting high-impedance sensor interfacing without loading.
It exhibits 120 dB crosstalk attenuation at 1 kHz and maintains stable unity-gain performance up to 4.5 MHz, with 18 nV/√Hz input voltage noise and 2 fA/√Hz input current noise - critical for A/D converter buffering and headphone amplifier stages where signal integrity and dynamic range are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | ±10 pA typ - enables direct connection to high-impedance sources (e.g., piezoelectric sensors) without significant DC error. |
| Gain bandwidth product | 4.5 MHz typ - supports stable closed-loop operation up to ~100 kHz with moderate gain, suitable for active filters and integrators. |
| Slew rate | 21 V/μs typ (VID = 1 V) - allows faithful reproduction of fast transient signals in audio and video driver applications. |
| Input offset voltage | ±0.125 mV typ - reduces initial DC error in precision instrumentation and calibration-critical signal chains. |
| Supply current per amplifier | 0.560 mA typ - enables dual-channel precision amplification in power-constrained systems without thermal derating. |
| Common-mode input range | −11.5 V to +14.5 V (±15 V supplies) - accommodates wide-swing input signals in single-supply-derived bipolar configurations. |
| Output voltage swing | ±14.95 V min (RL = 10 kΩ) - delivers near-rail output drive for maximum dynamic range in analog front-ends. |
Pinout & Package
LF412CPG4 is supplied in an 8-pin PDIP (Plastic Dual In-line Package) with 9.81 mm × 6.35 mm footprint and through-hole mounting. The package is RoHS-compliant with NIPDAU lead finish and rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output, channel 1 | Amplified output node for first op-amp; drives external load or feedback network. |
| 1IN− | Inverting input, channel 1 | Negative input terminal for differential amplification; accepts feedback or signal inversion path. |
| 1IN+ | Non-inverting input, channel 1 | Positive input terminal; connects to reference, sensor, or signal source requiring minimal loading. |
| VCC− | Negative supply rail | Lowest potential power connection; must be ≤ −3.5 V for proper operation (down to −18 V absolute max). |
| VCC+ | Positive supply rail | Highest potential power connection; must be ≥ +3.5 V (up to +18 V absolute max). |
| 2OUT | Output, channel 2 | Independent output for second amplifier; enables dual-path signal processing without cross-coupling. |
| 2IN− | Inverting input, channel 2 | Second amplifier's negative input; supports independent gain configuration and feedback design. |
| 2IN+ | Non-inverting input, channel 2 | Second amplifier's positive input; isolated from channel 1 for true dual-channel functionality. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Delivers ±10 pA input bias current and >540 GΩ input resistance - preserves signal integrity in high-Z sensor interfaces. |
| Internally trimmed offset voltage | ±0.125 mV typical offset minimizes calibration overhead in precision measurement and control loops. |
| Low-noise performance | 18 nV/√Hz voltage noise and 2 fA/√Hz current noise enable clean amplification of microvolt-level signals. |
| High crosstalk isolation | 120 dB channel-to-channel isolation at 1 kHz prevents interference between dual amplifier paths in shared PCB layouts. |
| Wide supply range | Operates from ±3.5 V to ±18 V - supports legacy industrial rails and modern low-voltage designs with same device. |
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 voltage follower with low drift and high output drive capability to sink/source charge during column inversion. Use Value: ±0.125 mV offset and ±0.3 μV/°C drift ensure consistent gray-scale rendering across temperature; 21 V/μs slew rate supports 60+ Hz refresh rates. |
Use Scenario: Isolating and scaling analog sensor outputs before digitization in data acquisition systems. IC Role / Device Role / Timing Role: Unity-gain buffer with ultra-high input impedance to prevent loading of high-Z transducer outputs (e.g., thermocouples, strain gauges). Use Value: ±10 pA input bias current avoids DC error accumulation; 4.5 MHz bandwidth preserves step response fidelity for multiplexed ADC sampling. |
| High-Side Current Sensing | Headphone Amplifier |
Use Scenario: Measuring load current via shunt resistor placed between supply and load in automotive or industrial power supplies. IC Role / Device Role / Timing Role: Differential amplifier configured for high common-mode rejection (CMRR ≥ 70 dB) at up to +14.5 V common-mode voltage. Use Value: −11.5 V to +14.5 V common-mode input range accommodates 12 V–24 V bus sensing; 100 dB PSRR suppresses supply ripple coupling. |
Use Scenario: Driving stereo headphones (32 Ω–600 Ω) from line-level DAC outputs in portable audio equipment. IC Role / Device Role / Timing Role: Low-distortion, low-noise output stage delivering ±14.95 V swing into 10 kΩ loads and stable into capacitive loads. Use Value: 21 V/μs slew rate prevents slew-induced distortion at 20 kHz; THD+N < −72 dB (1 kHz, 1 VRMS) ensures audiophile-grade fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CP | Lower supply current (170 µA per amp), but reduced GBW (850 kHz) and slew rate (0.03 V/μs); CMRR 80 dB min. | Better suited for ultra-low-power battery-operated systems where speed is secondary to quiescent current. | Select TLC27L2CP only when supply current < 200 µA is mandatory and bandwidth < 1 MHz suffices. |
| TL072CP | Higher slew rate (13 V/μs), higher GBW (3 MHz), but higher input bias current (±30 pA typ) and no guaranteed max offset drift. | Preferred in audio preamps requiring faster settling, but less ideal for precision DC-coupled sensing over temperature. | Choose TL072CP for cost-sensitive audio signal paths where ±30 pA bias current is acceptable and offset drift not tightly constrained. |
Compared with TLC27L2CP and TL072CP, the LF412CPG4 uniquely balances ultra-low input bias current (±10 pA), low offset drift (±0.3 μV/°C), and 4.5 MHz bandwidth - making it optimal for precision analog front-ends where both DC accuracy and AC fidelity are required simultaneously.
Availability
LF412CPG4 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 obsolescence management.
Supply support for LF412CPG4 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 decades of heritage in precision op-amp design and manufacturing excellence.
The LF412 product line was engineered for high-fidelity analog signal conditioning in cost-sensitive industrial and consumer applications - emphasizing low input current, low noise, and robust dual-amplifier integration in standard packages.
FAQ
What is the operating temperature range for the LF412CPG4?
The LF412CPG4 is specified 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 consumer displays and industrial instrumentation. The device's input offset voltage drift (±0.3 μV/°C typ) and supply current stability are characterized across this full range, ensuring predictable performance without derating.
Does the LF412CPG4 support single-supply operation?
Yes, the LF412CPG4 can operate from a single supply, provided the input common-mode voltage remains within its specified range (−11.5 V to +14.5 V relative to VCC−). When using a single +15 V supply, tie VCC− to ground and bias inputs at mid-rail (e.g., 7.5 V) via resistive dividers. Output swing will be limited to ~0.05 V above ground and ~14.95 V below VCC+, preserving usable dynamic range.
What is the maximum differential input voltage rating for the LF412CPG4?
The LF412CPG4 has an absolute maximum differential input voltage rating of ±30 V. This specification defines the peak voltage that may be applied between the inverting and non-inverting inputs without risk of permanent damage. For reliable operation, TI recommends limiting VID to ≤ ±15 V under normal conditions, especially at elevated temperatures, to avoid exceeding internal junction dissipation limits.
How does the LF412CPG4 compare to older LF412 variants in terms of performance?
The LF412CPG4 uses the "new die" fabrication introduced in revision C of the datasheet (August 2026), offering improved specifications over legacy versions: input bias current reduced from 50 pA to ±10 pA typ, slew rate increased from 13 V/μs to 21 V/μs, and gain bandwidth extended from 3 MHz to 4.5 MHz. These enhancements reflect modern process optimization while maintaining pin compatibility and electrical interoperability with prior LF412C variants.
Is the LF412CPG4 RoHS compliant and lead-free?
Yes, the LF412CPG4 is RoHS-compliant and features a lead-free NIPDAU (nickel-palladium-gold) lead finish. Per TI's packaging documentation, it meets JEDEC standards for moisture sensitivity level (MSL) and reflow profile compatibility. The PDIP package is exempt from MSL rating due to its through-hole construction, and the device carries full environmental compliance certification for use in EU and global markets.
LF412CPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LF412CPG4 FAQ
1.How can I place an order for LF412CPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LF412CPG4 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 LF412CPG4 reliable?
The price and inventory of LF412CPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF412CPG4 is usually 5 days.
3.What payment methods are accepted for LF412CPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF412CPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF412CPG4?
LF412CPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF412CPG4 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 LF412CPG4?
For technical support, including LF412CPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF412CPG4 requirements.
6.How does Aetrix verify that LF412CPG4 is sourced from the original manufacturer or authorized distributors?
All LF412CPG4 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 LF412CPG4 meets industry standards.
7.What is the process for return or replacement of LF412CPG4?
All LF412CPG4 units undergo pre-shipment inspection (PSI). If there is an issue with LF412CPG4, 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 LF412CPG4 part is unused and in its original packaging.
Return procedure for LF412CPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF412CPG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
