Texas Instruments LF412CDG4

Overview

LF412CDG4 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 across 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 LF412CDG4 datasheet, LF412CDG4 pinout, LF412CDG4 application, or LF412CDG4 equivalent, key selection criteria include its FET-input architecture enabling ultra-low input current, rail-to-rail-compatible output swing (±14.95 V at RL = 10 kΩ), and stable operation under ±3.5 V to ±18 V dual-supply conditions.

Technical Context

The LF412CDG4 employs a matched dual JFET differential pair input stage, delivering high common-mode rejection (≥70 dB) and supply-voltage rejection (≥70 dB) over temperature. Its internally trimmed offset voltage (±0.125 mV typ) and low drift (±0.3 μV/°C typ) support DC-critical signal conditioning without external nulling.

It features independent dual amplifiers in an SOIC-8 package with non-inverting/inverting inputs and outputs per channel, supporting single- or dual-supply configurations. The device maintains 120 dB crosstalk attenuation at 1 kHz, ensuring channel isolation in multi-channel sensing and driving circuits.

Key Specifications

Pinout & Package

LF412CDG4 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm with 1.27 mm lead pitch and maximum height of 1.75 mm. RoHS-compliant, NIPDAU lead finish, MSL Level-1, and tape-and-reel packaging (2500 pcs/reel) support automated assembly.

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 TL072CDR, the LF412CDG4 uniquely balances ultra-low input bias current (±10 pA), high slew rate (21 V/μs), and tight offset voltage (±0.125 mV), making it optimal for precision analog front-ends where sensor loading, speed, and DC accuracy are simultaneously critical.

Availability

LF412CDG4 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 LF412CDG4 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 over 90 years of innovation in high-reliability components.

The LF412CDG4 belongs to TI's legacy precision op-amp family designed for industrial, test & measurement, and display applications demanding low input current, low offset, and robust AC performance.

FAQ

What is the maximum supply voltage rating for the LF412CDG4?

The LF412CDG4 has absolute maximum supply ratings of ±18 V (VCC+ = +18 V, VCC– = −18 V). For reliable operation, TI specifies recommended operating conditions of ±3.5 V to ±18 V. Exceeding these limits risks permanent damage, and operation outside recommended ranges may degrade performance or reliability. Always refer to Section 5.1 and 5.2 of the SLOS010C datasheet for thermal and dissipation constraints.

Does the LF412CDG4 support single-supply operation?

Yes, the LF412CDG4 supports single-supply operation when biased appropriately - for example, with VCC+ = +15 V and VCC– = ground (0 V). However, its common-mode input range extends only to −11.5 V to +14.5 V under ±15 V supplies, so input signals must remain within that window. Input and output swing are not rail-to-rail; design margins must account for ~0.05 V headroom at each rail. Refer to Table 5-3 and Figure 5-1 for load-dependent swing curves.

What is the input offset voltage drift specification for the LF412CDG4?

The LF412CDG4 has an average temperature coefficient of input offset voltage (aVIO) of ±0.3 μV/°C typ across the full 0°C to 70°C operating range. This low drift ensures minimal DC error accumulation over temperature - critical for integrators, precision references, and long-duration measurements. The datasheet guarantees that at least 90% of units meet this limit, and worst-case drift remains ≤20 μV/°C per the max column in Section 5.3.

Is the LF412CDG4 pin-compatible with other dual op-amps in SOIC-8 packages?

The LF412CDG4 uses the industry-standard dual op-amp pinout (Pin 1 = Out A, Pin 2 = In– A, Pin 3 = In+ A, Pin 4 = V–, Pin 5 = V+, Pin 6 = Out B, Pin 7 = In– B, Pin 8 = In+ B), matching TL072, TLC27L2, and many others. While pinout is identical, electrical differences - especially input bias current (±10 pA vs ±30 pA for TL072) and offset voltage - require verification in the target circuit before substitution.

What is the typical input noise voltage of the LF412CDG4 at 1 kHz?

The LF412CDG4 exhibits a typical equivalent input noise voltage (Vn) of 18 nV/√Hz at 1 kHz with RS = 20 Ω, as specified in Section 5.4 of the SLOS010C datasheet. This value reflects combined thermal and flicker noise contributions and remains stable across frequency - see Figure 5-10 for spectral density behavior. For low-noise applications, pairing with low-source-impedance sensors (<1 kΩ) minimizes total system noise.