Texas Instruments LF412CD

Overview

LF412CD from Texas Instruments is a dual JFET-input operational amplifier optimized for low input bias current (±10 pA typ), low noise (2 fA/√Hz typ), and high-speed performance (4.5 MHz gain bandwidth, 21 V/μs slew rate). It operates from ±3.5 V to ±18 V supplies across 0°C to 70°C and serves as a precision buffer in A/D converters, VCOM drivers for TFT-LCD panels, and high-side/low-side current sensing circuits.

For engineers reviewing the LF412CD datasheet, LF412CD pinout, LF412CD application, or LF412CD equivalent, key selection criteria include verified input bias current stability over temperature, rail-to-rail output swing capability (±14.95 V at 10 kΩ), common-mode rejection ratio (70–100 dB), supply-voltage rejection (70–100 dB), and SOIC-8 package compatibility with standard PCB layouts.

Technical Context

The LF412CD 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 architecture supports wide common-mode input range (±11 V to +14.5 V) and high differential input resistance (540 GΩ).

It delivers 21 V/μs slew rate under ±15 V supplies with 100 pF load and achieves 120 dB crosstalk attenuation at 1 kHz - critical for dual-channel isolation in sample-and-hold and integrator applications where channel coupling must be minimized.

Key Specifications

Pinout & Package

LF412CD 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, moisture sensitivity level 1, and rated for reflow up to 260°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual FET-input op-amp applications.

Compared with TLC27L2CD and TL072CD, the LF412CD uniquely balances ultra-low input bias current (±10 pA), high slew rate (21 V/μs), and 4.5 MHz bandwidth - making it the only option among the three suitable for precision high-speed VCOM driving and low-drift sensor buffering in commercial-temperature environments.

Availability

LF412CD is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, industrial data acquisition systems, and portable audio equipment requiring stable component supply across multi-year production cycles.

Supply support for LF412CD 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 digital signal technologies, with decades of expertise in precision op-amp design and manufacturing.

The LF412CD belongs to TI's legacy precision JFET-input op-amp family, engineered for applications demanding low input current, low drift, and reliable performance in commercial-temperature instrumentation and display systems.

FAQ

What is the maximum operating supply voltage for LF412CD?

The LF412CD supports absolute maximum supply voltages of ±18 V, with recommended operating range from ±3.5 V to ±18 V. Operation beyond ±18 V risks permanent damage per Absolute Maximum Ratings. At ±15 V, the device delivers full specified performance including ±14.95 V output swing and 21 V/μs slew rate - critical for high-fidelity signal conditioning in LF412CD-based designs.

Does LF412CD support rail-to-rail input or output operation?

The LF412CD does not provide rail-to-rail input or output operation. Its common-mode input range extends from ±11 V to +14.5 V (with ±15 V supplies), and output swing reaches ±14.95 V into 10 kΩ - approximately 0.05 V from each rail. This near-rail performance is sufficient for most precision buffering applications but requires headroom consideration in low-voltage designs.

Is LF412CD pin-compatible with other dual JFET op-amps like TL072 or LF353?

Yes, LF412CD shares the standard 8-pin SOIC (D) pinout with TL072CD and LF353N - pin 1 (OUT1), pin 2 (IN−1), pin 3 (IN+1), pin 4 (V−), pin 5 (V+), pin 6 (OUT2), pin 7 (IN−2), pin 8 (IN+2). However, electrical differences (e.g., ±10 pA vs ±30 pA input bias) mean functional substitution requires validation of bias-current-sensitive stages in the LF412CD circuit.

What is the typical input offset voltage drift over temperature for LF412CD?

The LF412CD has an average temperature coefficient of input offset voltage of ±0.3 μV/°C across its 0°C to 70°C operating range. This low drift - confirmed in Section 5.3 of the datasheet - ensures minimal DC error accumulation in temperature-varying environments such as display panels or industrial sensors, directly supporting stable long-term calibration in LF412CD implementations.

Can LF412CD drive capacitive loads without instability?

The LF412CD is characterized for stable operation with 100 pF capacitive loads at 21 V/μs slew rate (Section 5.4), but larger capacitive loads may require external compensation. For loads >100 pF, a series resistor (e.g., 10–100 Ω) between output and capacitance is recommended to maintain phase margin. This behavior is documented in typical characteristics curves and must be verified per application layout when using LF412CD in high-capacitance interfaces.