THS4601ID - 180MHz FET-Input Op Amp | Texas Instruments
部品番号: THS4601ID ✓ 生産中THS4601ID 概要
A FET-input operational amplifier is a voltage-amplifier IC whose input stage uses field-effect transistors rather than bipolar input transistors. This type of input stage supports high input impedance and low bias current while operating in the voltage-amplifier hierarchy used for instrumentation, analog signal conditioning, buffers, and active filters. The THS4601ID is a single-channel general-purpose amplifier intended to preserve fast signal transitions without adding excessive input loading.
Key electrical characteristics include 180 MHz gain-bandwidth product, 100 V/µs slew rate, and approximately 100 pA input-bias current. Its ±5 V to ±15 V supply range supports dual-rail analog systems operating at 10 V or 30 V total voltage. These characteristics make the device suitable for high-speed buffer stages, low-level sensor interfaces, communications equipment, and test-and-measurement signal chains.
The combination of wide bandwidth and high slew rate allows the amplifier to process signals with short rise and fall times. At low signal amplitudes, bandwidth behavior is primarily governed by the 180 MHz gain-bandwidth product; at larger output transitions, slew rate becomes the principal limiting factor. Because it is a FET-input amplifier, the input stage can avoid the higher bias currents characteristic of many bipolar-input op amps while retaining wideband operation.
Typical uses include instrumentation amplifiers, active filters, analog measurement front ends, communication receivers, data-acquisition channels, and impedance buffers. The SOIC-8 package supports conventional surface-mount assembly and is useful when a high-speed amplifier must be placed close to the source or destination circuitry. The single-amplifier configuration also makes the device appropriate for designs that require one independent high-speed channel per package.
Layout is especially important because wideband amplifiers can amplify high-frequency noise, ringing, and supply ripple. Place input, output, and decoupling connections with short traces, maintain symmetric routing where practical, and use solid ground-plane return paths. Verify stability, output swing, settling behavior, and power-supply sequencing in the final circuit rather than assuming that nominal bandwidth alone guarantees system performance.
This page combines manufacturer product information, distributor availability indicators, same-package substitution details, application guidance, and practical design notes. It is structured to support direct part selection, PCB footprint confirmation, and drop-in replacement assessment for engineers evaluating the THS4601ID.
ドロップイン代替品: THS4601ID — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: THS4601ID （同一形状・フットプリント） — 相違点: Amplifier Type, Package, Slew Rate, Supply Voltage Range.
THS4601IDG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
THS4601CD
✅ ドロップイン📋 参考代替品（カタログ未掲載）
THS4601IDDAR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
THS4031CD
✅ ドロップイン価格はお問い合わせください
データシートを見る →THS4601ID 最大定格＆電気的特性
| Amplifier Type | Single-channel FET-input operational amplifier |
| Number of Amplifier Circuits | 1 circuit |
| Gain-Bandwidth Product | 180 MHz |
| Slew Rate | 100 V/µs |
| Input-Bias Current | 100 pA |
| Supply Voltage Range | ±5 V to ±15 V |
| Total Supply Voltage | 10 V to 30 V |
| Quiescent Current per Amplifier | 10 mA |
| パッケージ | 8-pin SOIC, 3.90 mm body width |
| 実装タイプ | Surface mount |
THS4601ID ピン構成
| ピン 1 | NC — Not connected (per datasheet) |
| ピン 2 | -IN — Inverting input |
| ピン 3 | +IN — Non-inverting input |
| ピン 4 | V- — Negative power supply |
| ピン 5 | NC — Not connected (per datasheet) |
| ピン 6 | OUT — Output |
| ピン 7 | V+ — Positive power supply |
| ピン 8 | NC — Not connected (per datasheet) |
主な用途
THS4601ID の用途: 6 件s: High-Speed Instrumentation Front End, Active Analog Filter, Communications Signal Conditioning, Data-Acquisition Channel, Precision Test and Measurement Buffer, High-Speed Audio and Video Buffer.
High-Speed Instrumentation Front End
The THS4601ID fits a high-speed instrumentation front end because its 180 MHz gain-bandwidth product preserves signal amplitude through moderate closed-loop gains, while its approximately 100 pA input-bias current limits loading on high-impedance sensors. Place the amplifier close to the sensor or transducer, use a short ground return, and decouple the supply pins locally. The 100 V/µs slew rate supports rapid output transitions, but source capacitance, input noise, common-mode limits, and output settling must be checked before selecting the gain and filter network.
おすすめ
Active Analog Filter
The THS4601ID is suitable for wideband active filtering where the 180 MHz gain-bandwidth product and 100 V/µs slew rate must support the signal bandwidth and largest expected transient. Its FET input provides approximately 100 pA bias current, making it useful when driving resistor-capacitor networks from high-impedance sources. Keep feedback components close to the amplifier, maintain short ground paths, and verify phase margin over the full operating frequency range because high closed-loop gain and capacitive loading can alter stability.
おすすめ
Communications Signal Conditioning
In communications equipment, the THS4601ID can condition intermediate-frequency or baseband signals whose transitions require more bandwidth than conventional precision amplifiers provide. Its 180 MHz gain-bandwidth product and 100 V/µs slew rate reduce amplitude loss and slew-related distortion in the signal path. The approximately 100 pA input-bias current also helps when the source is a high-impedance mixer, attenuator, or transducer. Use controlled impedance routing and a low-inductance supply return to prevent high-frequency ringing.
おすすめ
Data-Acquisition Channel
The THS4601ID can serve as the amplifier ahead of a high-speed data-acquisition converter when channel bandwidth must approach the amplifier's 180 MHz gain-bandwidth product. Fast large-signal transitions are supported by the 100 V/µs slew rate, while the approximately 100 pA input-bias current limits source loading. The design must still account for ADC settling, input range, sampling transients, and the amplifier's output-swing limits. Place the amplifier and its decoupling capacitor close to the converter input to minimize trace-induced distortion.
おすすめ
Precision Test and Measurement Buffer
The THS4601ID is useful as a buffer in oscilloscope front ends, signal generators, and automated test equipment when high source impedance must be combined with wide bandwidth. Approximately 100 pA input-bias current reduces perturbation of the measured source, and the 180 MHz bandwidth preserves fast signal components. Avoid interpreting the wide bandwidth as unlimited precision: input offset, voltage noise, temperature drift, and output settling determine the achievable measurement resolution. Select resistor values that preserve the required gain and keep parasitic capacitance low.
おすすめ
High-Speed Audio and Video Buffer
The THS4601ID can buffer audio or video lines where the required signal bandwidth exceeds the capability of many general-purpose op amps. Its 180 MHz gain-bandwidth product and 100 V/µs slew rate provide margin for fast edge reproduction, while the FET input helps isolate high-impedance source stages. In practical video paths, verify output settling, gain flatness, output drive, and channel-to-channel matching. Keep the package away from noisy digital return paths and use a continuous ground plane beneath and around the analog signal route.
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: THS4601ID — 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 | THS4601IDG4 | THS4601CD | THS4601IDDAR | THS4031CD |
|---|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifier Circuits | 1 circuit | 1 circuit | 1 circuit | 1 circuit | 1 circuit |
主な差別化要因
- Combines wideband operation with low-bias FET input （vs THS4031CD)
- Fast large-signal transitions （vs THS4601CD)
- Wide operating supply range （vs THS4031CD)
設計ノート
Route the non-inverting and inverting inputs as short and direct as possible, especially when feedback resistors are placed at the amplifier pins. A 180 MHz gain-bandwidth product and 100 V/µs slew rate make parasitic inductance and long loops capable of producing ringing. Keep the feedback loop compact, use a continuous ground plane, and avoid sharing high-current return paths between the amplifier and switching circuitry.
Place the supply-decoupling capacitor immediately adjacent to the positive and negative supply pins, with a low-inductance connection to the ground plane. Separate the amplifier's quiet analog return from noisy switching-current paths. Although the device supports ±5 V to ±15 V rails, verify output swing and common-mode limits against the actual signal and load. Bypass capacitors alone cannot compensate for an unsuitable supply source impedance.
Do not select the amplifier solely from the 180 MHz bandwidth figure. At large output amplitudes, the 100 V/µs slew rate can become the limiting parameter; at high closed-loop gain, noise gain and stability become increasingly important. Check output-current demand, capacitive loading, input common-mode range, output swing, and the gain profile against the intended source and load impedance before releasing the design.
For high-frequency operation, treat the PCB as part of the amplifier. Minimize pad and trace parasitics, maintain sensible return paths beneath the device, and position input components to avoid adding unwanted capacitance to the non-inverting input. If ringing occurs, test changes to source impedance, feedback values, and output isolation rather than compensating only with additional gain. Confirm final behavior with time-domain and frequency-domain measurements.
コンプライアンス情報
No explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement appears in the accessible component information. The THS4601 is a general-purpose operational amplifier rather than an automotive-qualified device.
