TL074CDR Low-Noise Quad JFET Operational Amplifier Overview
The TL074CDR from Texas Instruments is a high-performance quad operational amplifier (op-amp) engineered for low-noise multi-signal processing in audio, industrial, and measurement applications. Part of TI??s renowned linear portfolio, it integrates four JFET-input op-amps in a compact SOIC-14 package, offering exceptional noise performance, wide bandwidth, and reliable operation??critical for applications where signal integrity across multiple channels is non-negotiable. Its balance of low noise, high input impedance, and integrated design has made it a staple in professional audio equipment, precision sensors, and industrial control systems. الشركة المصنعة للدوائر المتكاملة offers this trusted component as part of its portfolio of premium analog semiconductors.
TL074CDR Technical Parameters
| المعلمة | القيمة | الوحدة |
|---|---|---|
| الوظيفة | Quad Low-Noise Operational Amplifier (JFET Input) | |
| نطاق جهد الإمداد | من 5 إلى 18 | V (dual supply); 10 to 36 (single supply) |
| Total Quiescent Current (all four amplifiers) | 3.6 | mA (typical, at ??15V) |
| Gain Bandwidth Product (per amplifier) | 3.0 | MHz (typical) |
| نوع الحزمة | SOIC-14 (Small Outline Integrated Circuit, 14-pin) | |
| نطاق درجة حرارة التشغيل | -40 to +85 | ??C |
الخصائص الوظيفية الرئيسية
| الخصائص | المواصفات |
|---|---|
| Input Noise Voltage (1kHz) | 15 nV/??Hz (typical) |
| Input Bias Current (per amplifier) | 30 pA (maximum, at 25??C) |
| Common-Mode Rejection Ratio (CMRR) | 80 dB (minimum) |
| Slew Rate (per amplifier) | 13 V/??s (typical) |
| Output Current (per amplifier) | 10 mA (minimum, into 1k?? load) |
Advantages Over Alternative Amplification Solutions
The TL074CDR outperforms arrays of single op-amps and discrete signal chains, starting with its integrated quad design. By combining four JFET-input op-amps in one SOIC-14 package, it reduces component count by 75% compared to using four discrete units??critical for space-constrained audio mixers and industrial sensor hubs. “We cut PCB complexity by 50% in our 8-channel audio interfaces by switching to this quad op-amp,” notes a senior engineer at a leading professional audio equipment manufacturer.
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With 15 nV/??Hz input noise at 1kHz, it reduces unwanted signal interference by 60% compared to general-purpose quad op-amps (40+ nV/??Hz)??a difference that translates to clearer audio and more accurate measurements in multi-channel systems. Its JFET-input architecture minimizes input bias current (30 pA per amplifier) versus BJT-input alternatives (100+ nA), preventing signal loading in high-impedance setups like microphone arrays and photodiode sensors.
The 3MHz bandwidth and 13 V/??s slew rate handle high-frequency audio (up to 20kHz) and fast sensor transients without distortion, outpacing slower quad op-amps that muffle high-end details. The SOIC-14 package (8.6mm??3.9mm) saves 40% space versus discrete setups, fitting into rack-mounted audio gear and compact industrial controllers.
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Its ??5V to ??18V supply range offers flexibility across systems, from battery-powered portable devices (10V single supply) to industrial instrumentation (??15V), eliminating the need for multiple op-amp models in product lines. Its -40??C to +85??C temperature range also ensures reliability in harsh environments, from stage equipment to factory floors.
Typical Applications of TL074CDR
The TL074CDR excels in low-noise, multi-channel signal processing. Key use cases include:
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- Consumer Electronics (professional audio mixers, multi-channel preamps, home theater processors)
- Test and Measurement (multi-sensor data acquisition systems, oscilloscope signal conditioning)
- Industrial Automation (high-impedance sensor arrays, process control loops, strain gauge amplifiers)
- Medical Devices (multi-lead ECG amplifiers, low-noise patient monitors)
- Telecommunications (multi-channel receiver front-ends, low-level signal conditioning)
Texas Instruments?? Expertise in Analog Design
As a Texas Instruments product, the TL074CDR leverages TI??s 80+ years of leadership in analog semiconductors. TI??s low-noise op-amps undergo specialized testing??including noise floor analysis across temperature ranges and input conditions??to ensure consistent performance. This commitment to precision has made TI a trusted partner for brands like Bose, Yamaha, and Keysight, who rely on components like the TL074CDR for their high-performance audio and measurement systems.
الأسئلة المتداولة (FAQ)
What is a quad JFET operational amplifier, and how does the TL074CDR work?
A quad JFET op-amp integrates four independent JFET-input amplifiers in one package, enabling simultaneous processing of four analog signals. The TL074CDR amplifies weak signals from multiple sources (e.g., microphones, sensors) with low noise, thanks to its JFET design that minimizes input bias current. Its quad configuration is ideal for multi-channel systems like audio mixers and sensor arrays requiring matched performance across channels.
Why is low noise (15 nV/??Hz) important for multi-channel audio applications?
Low noise ensures faint signals from multiple sources (e.g., vocal mics, instruments) aren??t masked by amplifier-generated noise. At 15 nV/??Hz, the TL074CDR preserves subtle details in multi-track recordings, where noise from four channels would compound with noisier op-amps. This is critical for professional audio, where clarity across channels directly impacts mix quality.
How does the 3MHz bandwidth benefit high-frequency applications?
3MHz bandwidth allows the TL074CDR to amplify signals up to high frequencies without attenuation. For audio, this covers the full 20Hz?C20kHz range with headroom, preventing loss of high-frequency details like cymbals or string overtones. For multi-sensor systems, it handles fast transients, ensuring accurate capture of rapidly changing signals across all four channels.
What advantages does the SOIC-14 package offer for compact designs?
The SOIC-14??s small footprint (8.6mm??3.9mm) fits into space-constrained PCBs, such as rack-mounted audio interfaces and industrial control modules. Its surface-mount design supports automated assembly, critical for high-volume production, while its 14-pin layout consolidates four op-amps into one component??saving space and simplifying routing compared to discrete units.
Why is the TL074CDR suitable for high-impedance sensor arrays?
Its JFET-input design minimizes input bias current (30 pA per amplifier), preventing loading of high-impedance sources like photodiodes, piezoelectric sensors, or microphone capsules. High bias current in other op-amps would draw current from these sources, altering the signal. The TL074CDR preserves signal integrity across all four channels, making it ideal for multi-sensor measurement and audio recording.