TL072CP - Dual JFET-Input Low-Noise Op Amp, 8-PDIP | Texas Instruments
部品番号: TL072CP ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.66 | $6.60 |
| 100 | $0.52 | $52.00 |
| 500 | $0.43 | $215.00 |
| 1,000 | $0.36 | $360.00 |
| 2,500 | $0.31 | $775.00 |
TL072CP 概要
A JFET-input operational amplifier is a type of op amp whose input stage uses Junction Field-Effect Transistors instead of bipolar transistors, providing extremely high input impedance (typically 10^12 Ω) and very low input bias currents (typically 30 pA). Within the broader analog IC hierarchy, the TL072 belongs to the JFET op amp family > general-purpose op amp > operational amplifier > amplifier IC > analog signal chain > semiconductor. This architecture makes the TL07x family ideally suited as a low-noise version of the TL08x JFET op amp series for cost-sensitive precision designs.
Key features include low total harmonic distortion (0.003% typ), low input bias and offset currents, output short-circuit protection, internal frequency compensation, and high input impedance JFET input stage. The low harmonic distortion and low 18 nV/√Hz noise density make the TL07x family well-suited to high-fidelity audio preamplifier, active filter, and instrumentation front-end designs. The "C" suffix indicates the commercial temperature grade (0°C to +70°C), and the "P" indicates the 8-pin plastic DIP package.
The TL07x architecture uses a bipolar-JFET hybrid process combining a JFET differential input pair with a bipolar output stage, achieving faster slew rate than pure bipolar equivalents while maintaining lower current noise than CMOS input stages. The trade-off is moderate offset voltage (typically a few mV) versus precision op amps such as the OPA1612 or LT1028.
Typical applications include stereo audio preamplifiers, equalizers, active audio crossovers, audio mixer summing amplifiers, low-noise transducer amplifiers, sample-and-hold buffers, and active filters. The TL072 is also widely used in hobbyist guitar effects pedals (e.g., Tube Screamer variants) and synthesizer modules.
When designing with the TL072CP, consider that its 3 MHz GBW limits it to audio-bandwidth applications; for wider bandwidth designs the TL082 or NE5532 family is preferred. Standard dual-supply operation (±15 V for audio, ±5 V for low-voltage designs) with 100 nF ceramic bypass capacitors close to the supply pins is recommended to maintain noise performance.
This page synthesizes distributor pricing, drop-in alternatives such as TL072IP and TL072H, and practical design notes not typically compiled on a single manufacturer product page.
ドロップイン代替品: TL072CP — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
TL072IP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TL082CP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TL072CP 最大定格＆電気的特性
| Manufacturer | Texas Instruments |
| Part Status | Active |
| Amplifier Type | JFET-Input Operational Amplifier |
| Number of Circuits | 2 (Dual) |
| Slew Rate | 13 V/µs (typical) |
| Gain Bandwidth Product | 3 MHz (typical) |
| Input Bias Current | 30 pA (typical) |
| Input Offset Voltage | 3 mV (typical, C grade) |
| Input Noise Voltage Density | 18 nV/√Hz (typical at 1 kHz) |
| Total Harmonic Distortion | 0.003% (typical) |
| Supply Voltage Range (Dual) | ±3.5 V to ±18 V |
| Supply Voltage Range (Single) | 7 V to 36 V |
| 動作温度範囲 | 0°C to +70°C (C grade) |
| パッケージ / ケース | 8-PDIP (Plastic DIP, through-hole) |
| 実装タイプ | Through Hole |
| ピン数 | 8 |
| Output Short-Circuit Protection | Yes |
| Internal Frequency Compensation | Yes |
| Latch-up Free Operation | Yes |
| RoHS ステータス | Compliant |
TL072CP ピン構成
| ピン 1 | OUTPUT 1A — Channel 1 op amp output |
| ピン 2 | INVERTING INPUT 1A — Channel 1 inverting input (−) |
| ピン 3 | NON-INVERTING INPUT 1A — Channel 1 non-inverting input (+) |
| ピン 4 | V− — Negative supply voltage (or GND for single-supply) |
| ピン 5 | NON-INVERTING INPUT 2A — Channel 2 non-inverting input (+) |
| ピン 6 | INVERTING INPUT 2A — Channel 2 inverting input (−) |
| ピン 7 | OUTPUT 2A — Channel 2 op amp output |
| ピン 8 | V+ — Positive supply voltage |
主な用途
TL072CP の用途: 7 件s: Stereo Audio Preamplifier, Active Audio Crossover Network, Synthesizer and Guitar Effects Pedals, Active Filters and Equalizers, Photodiode and High-Impedance Sensor Amplifier, Sample-and-Hold and Instrumentation Buffers, Industrial Control Signal Conditioning.
Stereo Audio Preamplifier
The TL072CP's 18 nV/√Hz input noise density and high input impedance JFET input stage make it a strong fit for stereo audio preamplifier front ends. Two independent channels in one 8-pin PDIP package let designers build a compact stereo preamp with ±15 V supplies, where the low harmonic distortion (0.003% typ) preserves audio fidelity. Compared to bipolar-input op amps, the JFET input needs only tens of pA of bias current, so coupling from high-impedance pickups or instrument sources stays clean. The 13 V/µs slew rate is more than sufficient for full audio-bandwidth signals up to 20 kHz, while the 3 MHz gain bandwidth product supports gain stages up to about 30 dB without instability.
おすすめ
Active Audio Crossover Network
The TL072CP is commonly used in 2-way and 3-way active audio crossover networks thanks to its dual op amp configuration and Sallen-Key topology compatibility. The 3 MHz gain-bandwidth product is sufficient to implement Linkwitz-Riley 2nd-order (24 dB/oct) slopes above the audio band, while the 13 V/µs slew rate lets the filter pass transients cleanly. Designers cascade two TL072CP devices (4 op amps total) to build a 3-way crossover for hi-fi speaker systems, using each op amp as a unity-gain buffer or inverting filter. The low noise contribution of the TL072CP helps preserve the dynamic range of the source even with the additional gain stages.
おすすめ
Synthesizer and Guitar Effects Pedals
The TL072CP has been a workhorse in guitar effects pedals and synthesizer modules for decades, particularly in overdrive, distortion, fuzz, and equalizer circuits. Its dual-channel 8-pin PDIP package is breadboard-friendly, and the JFET input handles high-impedance instrument signals (typically 50 kΩ to 500 kΩ source impedance) without significant loading. The device's moderate 3 MHz GBW and 13 V/µs slew rate provide more than adequate audio performance while keeping the sonic character of the audio path smooth. In modular synth voltage-controlled amplifier (VCA) and voltage-controlled filter (VCF) designs, the TL072CP's low bias current keeps the control-voltage summing node stable.
おすすめ
Active Filters and Equalizers
The TL072CP drives a wide variety of active filter topologies — Sallen-Key, multiple-feedback (MFB), state-variable — for graphic and parametric equalizers in audio and instrumentation. The 3 MHz gain-bandwidth product permits Sallen-Key low-pass and high-pass filters with Q up to about 5 in the audio band, while two channels per package handle stereo or dual-band equalizer sections. The low input offset voltage (typically 3 mV in C grade) limits filter response deviations at low frequencies, and the matched channels within a single IC reduce gain mismatch that would otherwise tilt the stereo image. Designers will typically use precision 1% resistors and 5% NP0/C0G capacitors to keep filter Q and corner frequency within tolerance.
おすすめ
Photodiode and High-Impedance Sensor Amplifier
The TL072CP's JFET input stage with bias currents of only ~30 pA makes it well-suited to photodiode transimpedance amplifiers and high-impedance sensor front-ends. Two channels fit nicely into a differential photodiode amplifier or a combined current-to-voltage plus buffer circuit in a single 8-pin PDIP. At room temperature, the 18 nV/√Hz input voltage noise and JFET current noise (~0.01 pA/√Hz) are usually not the limiting factor in the 1 kΩ to 1 MΩ feedback range typical of photodiode circuits. Designers should still minimize stray capacitance at the inverting input node, since the 3 MHz GBW can interact with capacitive loads to cause peaking or oscillation.
おすすめ
Sample-and-Hold and Instrumentation Buffers
The TL072CP serves as a low-cost sample-and-hold buffer or unity-gain instrumentation buffer when moderate DC accuracy is acceptable. Two channels in a single DIP package can implement a dual-channel track-and-hold for low-speed multiplexed data acquisition, with the JFET input's low bias current keeping the hold capacitor's discharge rate low. The 3 MHz GBW and 13 V/µs slew rate deliver adequate acquisition rate for signals up to a few hundred kHz, and the input offset of typically 3 mV (C grade) is acceptable for 10-bit or 12-bit converter front-ends. Adding a precision op amp such as the OPA2277 in front of the TL072CP for higher-resolution applications is a common hybrid design pattern.
おすすめ
Industrial Control Signal Conditioning
The TL072CP is widely deployed in industrial control loops for transducer signal conditioning, 4-20 mA current loop receivers, and active rectification. Its dual op amp channels comfortably fit differential amplifiers, instrumentation front ends, and rectifier summing nodes for process control signals. The ±3.5 V to ±18 V supply range handles the ±15 V rails common in industrial systems, and the output short-circuit protection provides robustness against wiring faults. For new industrial designs, however, designers often prefer the TL072IP (industrial −40°C to +85°C) or the TL072H for guaranteed performance across a wider temperature range.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TL072CP — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TL072IP | TL082CP | TL074CN |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | PDIP-8 | PDIP-8 | PDIP-8 | PDIP-14 |
| Number of Channels | 2 (Dual) | 2 (Dual) | 2 (Dual) | 4 (Quad) |
| Gain Bandwidth Product (typ) | 3 MHz | 3 MHz | 3 MHz | 3 MHz |
| Slew Rate (typ) | 13 V/µs | 13 V/µs | 13 V/µs | 13 V/µs |
| Input Noise Voltage Density (typ, 1 kHz) | 18 nV/√Hz | 18 nV/√Hz | ~25 nV/√Hz (higher) | 18 nV/√Hz |
| Operating Temperature | 0°C to +70°C (C grade) | -40°C to +85°C (I grade) | 0°C to +70°C | 0°C to +70°C |
| Supply Voltage Range | ±3.5 V to ±18 V | ±3.5 V to ±18 V | ±3.5 V to ±18 V | ±3.5 V to ±18 V |
| Drop-in Compatible | Reference | Yes (same pinout) | Yes (same pinout, higher noise) | No (PDIP-14, different pinout) |
主な差別化要因
- Industry-standard JFET-input dual op amp with broad second-source supply （vs TL082CP)
- Higher-temperature operation available in same family （vs TL072IP)
- Next-generation option with significant performance gains （vs TL072H (SOIC-8))
設計ノート
Always place 100 nF ceramic bypass capacitors within a few millimetres of the V+ (pin 8) and V− (pin 4) supply pins, with a short trace to ground. For audio designs, adding a 10 µF electrolytic or tantalum bulk capacitor near each supply rail suppresses low-frequency noise and prevents supply pumping in single-supply designs. Estimated total quiescent dissipation at ±18 V is about 50 mW per channel (≈100 mW total for both channels), so thermal management is rarely a concern in the PDIP package.
Do not assume the TL072CP can drive 600 Ω audio lines to ±10 V swing — at unity gain into a 600 Ω load the output stage approaches its current limit (~25-30 mA typical) and distortion rises significantly. For headphone or line-output stages requiring low output impedance under heavy load, consider the NE5532 or dual-supply op amps with higher output drive capability. Also note that input voltage ranges only extend to about 1.5 V below the positive rail — for rail-to-rail input needs, choose a different part such as the OPA2134 or an actual rail-to-rail amplifier.
In dual-supply audio layouts, keep input traces short and avoid routing them near high-current supplies or output traces. For stereo designs, mirror the PCB layout around the IC to maintain channel-to-channel matching in the audio band. The exposed bottom of the PDIP plastic package is electrically isolated, but a copper pour under the IC still acts as a thermal heatsink and a small ground reference plane that improves EMI immunity. Estimated: with a 2 oz copper pour of roughly 100 mm², the TL072CP junction temperature drops by ~5°C compared to minimum-thermal PCB, sufficient for most audio applications dissipating ~100 mW.
コンプライアンス情報
RoHS compliant and lead-free per TI TL072 product page. Not AEC-Q100 qualified — for automotive applications use a Q-qualified equivalent. Halogen-free status not explicitly confirmed in the verified web data.
