TL074CDR - Quad Low-Noise JFET Op-Amp 14-SOIC | Texas Instruments
부품 번호: TL074CDR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.41 | $0.41 |
| 10 | $0.34 | $3.40 |
| 100 | $0.23 | $23.00 |
| 500 | $0.18 | $90.00 |
| 1,000 | $0.15 | $150.00 |
| 2,500 | $0.12 | $300.00 |
TL074CDR 개요
What is a JFET-input operational amplifier? A JFET-input op-amp (sometimes called a JFET op-amp or BiFET op-amp when JFET and bipolar are monolithically combined, as in the TL074) is a type of operational amplifier whose input stage uses JFET transistors instead of bipolar transistors. The JFET input delivers an extremely high input impedance (typically 10^12 ohm) and very low input bias current (typ. 30 pA), making the topology ideal for high-impedance sensor front-ends, audio preamplifiers, and integrator circuits. JFET-input op-amps sit within the operational amplifier taxonomy below general-purpose amplifiers and above specialty low-noise instrumentation amplifiers.
Key features of the TL074CDR include internal frequency compensation, output short-circuit protection, latch-up-free operation, low total harmonic distortion, and a low offset-voltage temperature coefficient. The four independent channels share common power pins, eliminating the need for four separate single op-amps in dense multi-channel designs. The 'C' speed grade offers 3 MHz GBW and 13 V/us slew rate, while the 'B' grade and standard 'non-suffix' grade share the same channel architecture but vary in offset specifications.
From a circuit-design standpoint, the TL074CDR is built on TI's mature BiFET-II process, which combines a JFET input differential pair with a bipolar output stage to deliver higher output drive (typ. 20 mA short-circuit output current) than all-JFET designs while preserving JFET-class input impedance. The internal compensation capacitor removes the need for external frequency-compensation components and guarantees unity-gain stability.
Typical applications include audio preamplifiers and equalizers, active filters (Sallen-Key, multiple-feedback), signal conditioning for transducers, sample-and-hold buffers, professional audio mixers, and general-purpose signal-conditioning stages. The 14-SOIC package is pin-compatible with the legacy TL074 footprint and occupies roughly half the board area of a 14-DIP version while still supporting hand-soldering on standard 1.27 mm pitch land patterns.
When designing with the TL074CDR, ensure that the input common-mode voltage stays within the specified input voltage range (VCC- + 4 V to VCC+ + 4 V on a single supply) and that the output stays below the absolute maximum supply rails. For ultra-low-noise instrumentation front-ends, consider the lower-noise OPA167x or OPA1612 family; for higher precision DC accuracy, consider the OPA2277.
드롭인 대체품: TL074CDR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TL074CDR (동일 폼 팩터 및 풋프린트) — 차이점: Amplifier Type, Slew Rate, Number of Channels, Gain Bandwidth Product, Input Bias Current.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TL074IDR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TL074BCDR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TL074CD
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MC33079DR2G
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LF347DR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TL084CDR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TL074CDR 최대 정격 & 전기적 특성
| Amplifier Type | JFET-Input Operational Amplifier |
| Number of Channels | 4 (Quad) |
| Gain Bandwidth Product (GBW) | 3 MHz (typical) |
| Slew Rate | 13 V/us (typical) |
| Input Bias Current | 30 pA (typical) |
| Equivalent Input Noise Voltage | 18 nV/sqrt(Hz) at 1 kHz (typical) |
| Total Harmonic Distortion (THD) | <= 0.003% (typical) |
| Supply Voltage - Single Supply | 7 V to 36 V |
| Supply Voltage - Dual Supply | +/-3.5 V to +/-18 V |
| 동작 온도 | 0C to +70C |
| 패키지 | 14-SOIC (D) 3.90 mm |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 1 (unlimited) |
| RoHS 상태 | Compliant |
| Lead-Free | Yes |
| Frequency Compensation | Internal (unity-gain stable) |
TL074CDR 핀 구성
| 핀 1 | 1OUT — Channel 1 (A) output |
| 핀 2 | 1IN- — Channel 1 inverting input |
| 핀 3 | 1IN+ — Channel 1 non-inverting input |
| 핀 4 | VCC- — Negative power supply (or GND for single supply) |
| 핀 5 | 2IN+ — Channel 2 non-inverting input |
| 핀 6 | 2IN- — Channel 2 inverting input |
| 핀 7 | 2OUT — Channel 2 (B) output |
| 핀 8 | 3OUT — Channel 3 (C) output |
| 핀 9 | 3IN- — Channel 3 inverting input |
| 핀 10 | 3IN+ — Channel 3 non-inverting input |
| 핀 11 | VCC+ — Positive power supply |
| 핀 12 | 4IN+ — Channel 4 non-inverting input |
| 핀 13 | 4IN- — Channel 4 inverting input |
| 핀 14 | 4OUT — Channel 4 (D) output |
일반적인 애플리케이션
TL074CDR 적합 용도: 7 애플리케이션s: Audio Preamplifier Front-End, Active Filter (Sallen-Key / MFB) Design, Transducer and Sensor Signal Conditioning, Sample-and-Hold and Integrator Circuits, Professional Audio Mixer Channel Strip, Function Generator and Waveform Buffering, Industrial Process Control Signal Conditioning.
Audio Preamplifier Front-End
The TL074CDR's 18 nV/sqrt(Hz) input noise, 30 pA input bias current, and 13 V/us slew rate make it well suited to high-impedance audio preamplifier front-ends. Each of the four channels provides JFET-input low-noise amplification for microphone, guitar pickup, or line-level signals in the 20 Hz to 20 kHz audio band. In a typical high-Z preamp the TL074CDR contributes well below 0.01% THD at 1 kHz while its high input impedance prevents loading of passive tone-shaping networks. Compared with the older TL074 non-suffix grade, the C grade offers tighter production tolerances. According to the TI TL07xx datasheet, the JFET input eliminates the need for input bias-current compensation resistors in most audio circuits.
추천
Active Filter (Sallen-Key / MFB) Design
With 3 MHz GBW and unity-gain stability, the TL074CDR supports Sallen-Key and multiple-feedback active filters from DC to several hundred kHz. Each channel delivers consistent AC performance, enabling matched 2nd-order filter stages for 4-pole low-pass, high-pass, and band-pass realizations. The JFET input contributes low noise that preserves filter Q in high-Q band-pass sections. Designers using the TL074CDR for state-variable filters can rely on the 13 V/us slew rate for 100 kHz filter designs at 5 V peak-to-peak output. The TI TL07xx datasheet Application Information section provides reference Sallen-Key circuits scaled for common cutoff frequencies.
추천
Transducer and Sensor Signal Conditioning
The TL074CDR's 30 pA typical input bias current and 10^12 ohm input impedance make it appropriate for conditioning outputs from piezoelectric sensors, photodiodes in photovoltaic mode, and high-impedance electret microphones. Each of the four channels can buffer one transducer or form a transimpedance amplifier for a photodiode array. The BiFET architecture combines JFET-class input behavior with bipolar-class output drive, capable of sinking and sourcing tens of milliamps for cable-driving applications. According to TI datasheet guidance, the TL074CDR supports common-mode input to within approximately 4 V of the positive supply rail on single-supply 12 V operation.
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Sample-and-Hold and Integrator Circuits
The TL074CDR's very low input bias current (30 pA) and JFET input make it suitable for analog integrators and sample-and-hold buffers where leakage across the hold capacitor would otherwise cause droop errors. A standard non-inverting integrator using a TL074CDR channel and a 10 nF polystyrene capacitor reaches time constants on the order of 1 second. The 13 V/us slew rate allows accurate integration of triangle and ramp waveforms up to several hundred kHz. According to the TI TL07xx datasheet, the use of a BiFET input reduces integrator droop by orders of magnitude compared with bipolar-input alternatives like the LM324.
추천
Professional Audio Mixer Channel Strip
In a 4-channel mixer channel strip, the TL074CDR quad op-amp provides mic preamp, EQ, summing, and output buffering in a single 14-SOIC package. Each channel handles approximately 6 dB of headroom above nominal 0 dBu line level with low distortion (< 0.003% THD). The wide supply range (up to +/-18 V) supports professional +/-15 V powered designs. Compared with the LM45600/H-series predecessors, the TL074CDR remains an industry workhorse for cost-sensitive professional audio because of its BiFET noise/impedance balance. The 14-SOIC surface-mount package reduces channel-strip board area by roughly 60% versus the equivalent 14-DIP TL074CN layout.
추천
Function Generator and Waveform Buffering
The TL074CDR can serve as an output buffer and offset-level shift stage for function generators, where four independent channels handle buffered sine/square/triangle distribution on a single 14-SOIC. The 13 V/us slew rate preserves waveform edges in 100 kHz-class signals, and the BiFET output drives 600 ohm loads typical of vintage lab test equipment. Designers using the TL074CDR in test gear benefit from the part's wide supply tolerance (7 V to 36 V single-supply) which works directly from bench PSU rails without additional regulators. The TI TL07xx datasheet Application Information section references waveform-shaping circuits built around the BiFET quad architecture.
추천
Industrial Process Control Signal Conditioning
Inside an industrial analog signal-conditioning module, the TL074CDR provides four channels of low-side current-to-voltage conversion, level shifting, and output buffering for PLC analog inputs. The 14-SOIC package fits standard 1.27 mm industrial land patterns, and the commercial 0C to 70C temperature range covers most indoor control cabinets. The TL074CDR's 3 MHz GBW is more than adequate for the sub-100 kHz bandwidth typical of 4-20 mA loops and thermocouple conditioning chains. For harsher field environments, the industrial-temp TL074IDR drop-in variant operates from -40C to +85C without PCB modifications.
추천
추천 제품 요약
엔지니어링 참조 데이터: TL074CDR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TL074IDR | TL074BCDR | MC33079DR2G | LF347DR | TL084CDR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | Texas Instruments | Texas Instruments |
| Package | 14-SOIC (D) | 14-SOIC (D) - same | 14-SOIC (D) - same | 14-SOIC (D) - same | 14-SOIC (D) - same | 14-SOIC (D) - same |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain Bandwidth Product | 3 MHz | 3 MHz | 3 MHz | 16 MHz | 3 MHz | 3 MHz |
| Slew Rate | 13 V/us | 13 V/us | 13 V/us | 7 V/us | 13 V/us | 13 V/us |
| Input Bias Current | 30 pA | 30 pA | 30 pA | 300 pA | 30 pA | 30 pA |
| Equivalent Input Noise | 18 nV/sqrt(Hz) at 1 kHz | 18 nV/sqrt(Hz) | 18 nV/sqrt(Hz) | 4.5 nV/sqrt(Hz) | 18 nV/sqrt(Hz) | 18 nV/sqrt(Hz) |
| Operating Temperature Range | 0C to +70C | -40C to +85C | 0C to +70C | -40C to +85C | 0C to +70C | 0C to +70C |
| Supply Voltage (max) | +/-18 V (36 V single) | +/-18 V | +/-18 V | +/-18 V | +/-18 V | +/-18 V |
| Architecture | BiFET (JFET input + bipolar output) | BiFET | BiFET | BiFET | BiFET | BiFET |
주요 차별점
- Industry-standard BiFET quad op-amp with 50+ years of design heritage (vs MC33079DR2G)
- Commercial 0C to +70C temperature range meets low-cost audio/industrial needs (vs TL074IDR)
- Internal frequency compensation - no external capacitor needed (vs MC33079DR2G)
설계 노트
The 14-SOIC (D) package for the TL074CDR has a theta_JA of approximately 115 C/W mounted on a standard JEDEC 2-layer test board. With four channels simultaneously delivering 10 mA each into 1 kohm loads on a +/-15 V supply (worst-case static dissipation around 4 channels x 30 mW), the junction temperature rise is well below 10C at 25C ambient. In audio preamp applications typical quiescent dissipation is only 0.8 mW per channel so no heatsinking is required. For higher-current line-driver applications near 50 mA per channel, consider derating or upgrading to TL074H for lower thermal voltage coefficient. Always provide a ground plane and stitch vias around the 14-SOIC thermal pad region for best heat spreading even with light dissipation.
Keep input traces short and routed over a continuous ground plane to minimize stray capacitance that can degrade phase margin in unity-gain buffers. According to the TI TL07xx datasheet Application Information, the TL074CDR is unity-gain stable but capacitive loads above 1000 pF can cause peaking in the closed-loop response - place a small series resistor (20-100 ohm) at the output if driving long cables or ADC input capacitances. Decouple VCC+ and VCC- pins with 100 nF ceramic + 10 uF tantalum each, placed within 5 mm of the supply pins, and provide a bulk bypass capacitor at the board power entry point.
Three common pitfalls when designing with the TL074CDR: (1) Exceeding the absolute maximum supply rating - the VCC+/VCC- differential must stay below 36 V on a single supply, which means +/-18 V dual supplies is the upper limit; (2) Allowing input common-mode voltage to drop within 4 V of the VCC- rail - the input stage saturates and the output phase reverses; (3) Using the TL074CDR in low-noise photodiode transimpedance applications below 1 kHz where its 30 pA input bias and 18 nV/sqrt(Hz) noise may still exceed precision requirements - consider the OPA627 or OPA2277 instead. The 'C' grade offset voltage is not as tight as the 'B' grade; for offset-critical DC paths choose TL074BCDR.
The TL074CDR is internally compensated for unity-gain stability, but at gains above 10 the closed-loop bandwidth extends beyond 10 MHz and PCB trace resonance can become an issue. Keep high-frequency signal traces short and parallel-run + and - inputs adjacent to each other to enforce common-mode noise rejection above 100 kHz. For applications sensitive to EMI, the enhanced TL074H family offers integrated EMI/RFI filtering per the TI TL07xH datasheet. In sample-and-hold or integrator circuits, route the holding/integration capacitor guard traces around the capacitor to minimize stray leakage - the 30 pA input bias can charge a 10 nF hold capacitor at about 3 mV/s, becoming significant in long-hold designs.
The TL074CDR's supply current is approximately 5 mA total (1.25 mA per channel) on a +/-15 V supply, much lower than the 7 mA of the original TL074 non-suffix grade. For dual-supply audio circuits, use the standard +/-15 V analog rail; for single-supply 12 V applications, bias the non-inverting inputs around 6 V mid-rail with a rail-splitter circuit (often a TL431 reference plus a BJT buffer). The output stage can source/sink approximately 20 mA short-circuit current per channel, but continuous operation above 10 mA per channel into low-impedance loads may push the SOIC package above its recommended thermal envelope, so derate appropriately or move to the SO PowerPAD variant if available.
규정 준수 정보
RoHS compliant per TI product page. Standard commercial temperature grade (0C to +70C); choose TL074IDR or TL074-Q1 for industrial/automotive. Halogen-free per TI declaration.
