STMicroelectronics TL074CDT

Overview

TL074CDT from STMicroelectronics is a low-noise, JFET-input quad operational amplifier in SO-14 package, featuring 16 V/µs typical slew rate, 15 nV/√Hz input voltage noise, and ±11 V common-mode input range at ±15 V supply. It delivers 0.01% THD at 1 kHz and includes internal frequency compensation and output short-circuit protection for audio and signal conditioning circuits.

For engineers reviewing the TL074CDT datasheet, TL074CDT pinout, TL074CDT application, or TL074CDT equivalent, this device is selected for precision analog front-ends requiring high input impedance (>10¹² Ω), low bias current (≤30 pA), stable gain-bandwidth (3 MHz), and rail-to-rail compatible output swing under 2 kΩ load.

Technical Context

The TL074CDT integrates four matched JFET-input op-amps on a single monolithic die with bipolar output stages, enabling high-voltage operation (±18 V max) and latch-up-free performance. Its JFET input stage provides ultra-low input bias current and low noise, while internal compensation ensures unity-gain stability without external components.

Designed for commercial temperature range (0°C to +70°C), it supports dual-supply operation from ±3 V to ±18 V and delivers 12 Vpp output swing into 2 kΩ at ±15 V supply. Channel separation exceeds 120 dB at AV = 100, minimizing crosstalk in multi-channel audio distribution systems.

Key Specifications

Pinout & Package

TL074CDT is housed in a 14-pin SO (Small Outline) plastic micropackage (SO14), 8.55–8.75 mm body length, 3.80–4.00 mm width, 1.35–1.75 mm height, with 1.27 mm lead pitch and gull-wing leads for surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL074CDT, TL084CDR trades 3 nV/√Hz noise for marginally better speed and cost, while RC4136N offers higher slew rate at the expense of noise, bias current, and design effort - making TL074CDT optimal for noise-sensitive, plug-and-play quad-buffering applications.

Availability

TL074CDT is available at Aetrix Electronics and suitable for audio distribution, active filter design, instrumentation signal conditioning, and DC-coupled sensor interface applications requiring stable component supply and commercial-grade temperature performance.

Supply support for TL074CDT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TL074 series belongs to ST's legacy precision analog portfolio, engineered specifically for high-fidelity audio, test & measurement, and industrial signal conditioning where JFET input performance outweighs CMOS alternatives.

FAQ

Is TL074CDT suitable for single-supply operation?

Yes - TL074CDT operates with split supplies (±3 V to ±18 V) or single-ended supplies (6 V to 36 V). When used in single-supply mode, the input common-mode range extends to within 1.5 V of VCC−, and output swing reaches within 2 V of each rail. Biasing the inputs at mid-supply via resistor dividers enables rail-to-rail signal handling without level-shifting circuitry.

What is the maximum capacitive load TL074CDT can drive without instability?

TL074CDT is unity-gain stable but exhibits phase margin degradation above 100 pF capacitive load. For loads exceeding 100 pF (e.g., long cables or ADC input capacitance), a 22 Ω to 47 Ω series resistor placed between the op-amp output and the load restores stability by isolating the capacitance from the feedback loop. This configuration maintains bandwidth above 100 kHz while preventing ringing or oscillation.

How does TL074CDT compare to TL074IDT in terms of temperature performance?

TL074CDT is rated for 0°C to +70°C operation, while TL074IDT extends to −40°C to +125°C. Key parameters differ: TL074CDT guarantees 3 mV max input offset voltage at +25°C, whereas TL074IDT specifies 6 mV max over its full range. Input bias current remains ≤30 pA for TL074CDT at +25°C but rises to ≤100 pA for TL074IDT at +125°C. Choose TL074CDT for cost-sensitive commercial designs within room-temperature environments.

Can TL074CDT replace LM324 in existing designs?

No - TL074CDT is not a direct replacement for LM324 due to fundamental architecture differences: LM324 uses bipolar input stages (higher bias current, ~45 nA), while TL074CDT uses JFET inputs (30 pA max). Swapping them risks input stage overload in high-impedance networks and alters noise, slew rate (LM324: 0.5 V/µs), and supply range compatibility. Reuse requires full revalidation of bias networks, stability margins, and noise performance.