TL074 Low Noise JFET Quad Operational Amplifier DIP-14

TL074 Low-Noise JFET Quad Operational Amplifier (DIP-14) delivers low-noise, high-input-impedance performance for multi-channel analog designs. Designers use it in audio preamps, active filters, instrumentation, and precision signal-conditioning where low input bias and low distortion matter.

Key Features:

• JFET Input Stage: Provides very high input impedance and low input bias current.
• Low Noise: Designed for low voltage-noise in audio and precision applications.
• Quad Channel: Four independent amplifiers in a single DIP-14 package for compact multi-channel designs.
• Wide Supply Range: Operates from single or dual supplies for flexible system integration.
• Good Slew Rate and Bandwidth: Supports fast, stable analog signal processing.

Technical Specifications:

• Supply Voltage (V_CC): Typically ±5 V to ±18 V (single or dual supply). Verify exact range in the datasheet.
• Input Offset Voltage: Typical a few mV. Check datasheet for min/typ/max values.
• Input Bias Current: Very low (JFET-level), typically in the pA range; ideal for high-impedance sources.
• Input Noise Voltage: Low voltage-noise suitable for audio and precision front-ends (see datasheet for numeric values).
• Gain-Bandwidth Product (GBW): Moderate bandwidth suitable for many audio and filter applications. Refer to manufacturer data for exact GBW.
• Slew Rate: Moderate slew rate for stable transient response in analog circuits. Consult datasheet for typical figures.
• Output Drive: Standard op-amp output current for DIP-14 class; use proper buffering for heavy loads.
• Operating Temperature Range: Commercial range typically −40 °C to +85 °C (confirm with datasheet).

Mechanical Specifications:

• Package Type: DIP-14 through-hole dual-inline package for easy prototyping and socket use.
• Lead Finish: Tin or tin-lead plated leads suitable for standard soldering practices.
• Body Material: Molded epoxy typical for DIP packages.
• Mounting: PCB through-hole or IC socket as required.

Dimensions:

• DIP-14 Body: Standard DIP body width ~7.62 mm (0.3 in) and length per standard DIP-14 mechanical drawing. Confirm exact dimensions in supplier mechanical drawing.
• Pin Pitch: 2.54 mm (0.1 in) standard DIP spacing for easy PCB layout and breadboard compatibility.

Pinout and Wiring:

• Pin 1: Output A
• Pin 2: Inverting Input A
• Pin 3: Non-inverting Input A
• Pin 4: VCC− (negative supply)
• Pin 5: Non-inverting Input B
• Pin 6: Inverting Input B
• Pin 7: Output B
• Pin 8: Output C
• Pin 9: Inverting Input C
• Pin 10: Non-inverting Input C
• Pin 11: VCC+ (positive supply)
• Pin 12: Non-inverting Input D
• Pin 13: Inverting Input D
• Pin 14: Output D
• Wiring Note: Tie VCC pins to appropriate supply rails. Place bypass capacitors (0.1 µF) close to supply pins for stable operation. Use input protection or bias networks when interfacing with high source impedances.

Datasheet Reference:

• Download the official TL074 datasheet from the manufacturer (TI, ST, or equivalent) for absolute maximum ratings, detailed electrical characteristics, thermal data, and application circuits.

Applications:

• Audio Preamplifiers: Use for low-noise microphone and line-level amplification.
• Active Filters and EQs: Implement multi-stage filters where matched quads reduce board space.
• Instrumentation Front-Ends: Condition small signals from sensors with high input impedance.
• Summing and Buffer Stages: Use multiple channels in a single package for compact mixing or buffering circuits.

Equivalent Models:

• TL074C / TL074AC: Vendor-specific grade variants with similar performance.
• NE5532 (dual alternatives): Use pairs of low-noise dual op amps when quad availability differs; validate pinout and performance differences.
• OPA4134 / NJM4560 (audio quads): Consider these when you need different noise, bandwidth, or output swing characteristics. Confirm electrical compatibility before substitution.

Package Includes:

• 1 x TL074 Low-Noise JFET Quad Operational Amplifier (DIP-14)