THS3061DGNR - 300MHz 7000V/us CFB Amplifier | Texas Instruments
部品番号: THS3061DGNR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.8 | $38.00 |
| 100 | $3.35 | $335.00 |
| 500 | $3 | $1,500.00 |
| 1,000 | $2.7 | $2,700.00 |
THS3061DGNR 概要
A current-feedback amplifier is a type of high-speed operational amplifier whose bandwidth is largely independent of closed-loop gain, making it a member of the broader amplifier hierarchy: CFB amplifier -> high-speed op amp -> operational amplifier -> analog signal-conditioning IC. Unlike voltage-feedback amplifiers, CFAs use a low-impedance inverting input and a current-driven internal stage, which is what enables their exceptional slew rates.
Key features of the THS3061 include a 0.1 dB flatness bandwidth of 120 MHz at a gain of 2, second-harmonic distortion of -81 dBc at 10 MHz, and high output drive current of +/-145 mA, per the TI datasheet. These specs suit applications that need both speed and signal swing into low impedances.
The device is fabricated on the TI BICOM-1 complementary bipolar process, which underpins its combination of high breakdown voltage (up to 30 V total supply) and high-frequency performance. The PowerPAD HVSSOP-8 package provides a low thermal-impedance path to the PCB, essential when driving heavy loads at high frequency.
Typical applications include high-voltage pulse and laser-diode drivers, ADC input drivers in test and measurement equipment, video and communications signal chains, and active probes requiring high slew rate with substantial output current.
Design consideration: because this is a current-feedback amplifier, the feedback resistor value should be kept close to the datasheet-recommended range; increasing RF reduces bandwidth and stabilizes the loop, while decreasing it can cause peaking or oscillation.
This page synthesizes distributor availability data, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet. Pricing references are as of 2026-09-13.
ドロップイン代替品: THS3061DGNR — 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: THS3061DGNR （同一形状・フットプリント） — 相違点: Amplifier Type, Package, Number of Channels, Slew Rate, 0.1 dB Bandwidth.
クイック比較ツール — 並列比較する代替部品を選択:
THS3061DGN
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$3.26 / 個
データシートを見る →THS3061DGNG4
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
THS3062DGN
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
THS4062IDGNR
✅ ドロップイン✓ 在庫あり
$1.45 / 個
データシートを見る →THS4061IDGNR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
THS3061DGNR 最大定格＆電気的特性
| Amplifier Type | Current Feedback (CFB) |
| Number of Channels | 1 |
| Unity Gain Bandwidth | 300 MHz |
| 0.1 dB Bandwidth | 120 MHz (G = 2) |
| Slew Rate | 7000 V/us |
| Output Current | +/-145 mA into 50 ohm |
| 2nd Harmonic Distortion | -81 dBc at 10 MHz |
| Supply Voltage Range | +/-15 V (30 V total) |
| 動作温度範囲 | -40C to +85C |
| パッケージ | HVSSOP-8 (DGN) with PowerPAD, 8 pins |
| 実装タイプ | Surface Mount |
| Process Technology | TI BICOM-1 |
| Packaging | Tape & Reel (R suffix) |
| カテゴリ | Linear - Amplifiers - Instrumentation, Op Amps, Buffer Amps |
THS3061DGNR ピン構成
| ピン 1 | IN- — Inverting input (low impedance, current-feedback node) |
| ピン 2 | IN+ — Non-inverting input (high impedance) |
| ピン 3 | V- — Negative supply |
| ピン 4 | V- — Negative supply |
| ピン 5 | NC — Not connected (per datasheet) |
| ピン 6 | V+ — Positive supply |
| ピン 7 | OUT — Amplifier output |
| ピン 8 | NC — Not connected (per datasheet) |
主な用途
THS3061DGNR の用途: 6 件s: High-Voltage Pulse Amplification, High-Speed ADC Input Driver, Laser Diode and LED Drivers, Video and Communications Signal Chains, Test and Measurement Instrumentation, Active Filter and Gain Blocks at High Supply.
High-Voltage Pulse Amplification
The THS3061DGNR fits pulse amplification because it combines a 7000 V/us slew rate with +/-145 mA output current and up to +/-15 V supplies, allowing fast, large-signal pulses to be reproduced without slew-induced distortion. In a typical pulse chain the amplifier is configured in a gain-of-2 or higher non-inverting CFB topology with the datasheet-recommended feedback resistor, driving 50-ohm coaxial lines directly. The PowerPAD package dissipates heat from the heavy load currents, and the 300 MHz bandwidth keeps pulse edges in the nanosecond range sharp. Unlike slower voltage-feedback parts such as the THS4061 (400 V/us), the THS3061 preserves fast rise times without adding slew limiting.
おすすめ
High-Speed ADC Input Driver
Driving high-speed ADCs at high input swing benefits from the THS3061DGNR's combination of 300 MHz bandwidth, -81 dBc distortion at 10 MHz, and +/-145 mA drive into low impedances. Placed as a gain block immediately before an ADC input, it isolates the source impedance from the ADC's switched-capacitor load through a series resistor network, while the low output impedance settles the sampling transient quickly. The 0.1 dB flatness bandwidth of 120 MHz at G=2 keeps passband gain error small across wideband signal chains. Because it is a current-feedback amplifier, the feedback resistor should follow datasheet recommendations to avoid peaking near the Nyquist band.
おすすめ
Laser Diode and LED Drivers
Laser diode modulation in instrumentation and optical test demands both current and speed; the THS3061DGNR's +/-145 mA output into 50 ohm and 7000 V/us slew rate let it drive modulation transistors or direct laser loads with nanosecond-class edges. Operating from +/-15 V rails gives the voltage headroom needed to keep current through series drive elements constant during fast transitions. The HVSSOP PowerPAD package routes device heat into the PCB ground plane, which matters at sustained high duty cycles. Designers should verify the load line stays inside the amplifier's output-current rating and add appropriate back-termination to damp cable reflections.
おすすめ
Video and Communications Signal Chains
Wideband video distribution and IF/RF gain blocks benefit from the THS3061DGNR's 120 MHz 0.1 dB flatness bandwidth at G=2, which keeps multi-channel video signals gain-matched across the band. The -81 dBc HD2 performance at 10 MHz limits harmonic spurs that would otherwise fold into the video or communication band. Set in a gain-of-2 CFB configuration with a 50-ohm back-terminated output, it can drive distribution cables directly at +/-145 mA capability. Compared with the THS4062IDGNR voltage-feedback alternative, the CFB architecture maintains bandwidth more uniformly across gain settings in reconfigurable chains.
おすすめ
Test and Measurement Instrumentation
Oscilloscope front ends, active probes, and signal generators need amplifiers that combine speed, swing, and drive; the THS3061DGNR's 300 MHz bandwidth and 7000 V/us slew rate support full-scale displays of fast waveforms without visible slew distortion, while the +/-15 V supply range matches classic bench-instrument analog rails. Its -81 dBc distortion at 10 MHz preserves measurement fidelity in harmonic-sensitive test setups. The PowerPAD DGN package simplifies thermal design inside dense instrument chassis. In signal-generator output stages, a series 50-ohm termination plus the amplifier's high current capability yields accurate source impedance into cables.
おすすめ
Active Filter and Gain Blocks at High Supply
Wideband active filters and general gain stages operating on +/-15 V rails use the THS3061DGNR where a 30 V total supply and 300 MHz bandwidth must coexist. Many high-speed amplifiers are limited to 12 V total supply, forcing reduced signal swing; the THS3061's high-voltage BICOM-1 process removes that constraint, doubling available output swing and improving SNR for a given noise floor. In Sallen-Key or multiple-feedback topologies, the CFB architecture's gain-independent bandwidth keeps filter corner frequencies stable as gain is adjusted. Designers must use stable CFB feedback-resistor values to prevent Q-enhancement peaking near the amplifier's phase margin limit.
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: THS3061DGNR — 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 | THS3061DGN | THS3062DGN | THS4062IDGNR | THS4061IDGNR |
|---|---|---|---|---|---|
| Package | HVSSOP-8 (DGN) PowerPAD | HVSSOP-8 (DGN) PowerPAD - same | HVSSOP-8 (DGN) PowerPAD - same | HVSSOP-8 (DGN) PowerPAD - same | HVSSOP-8 (DGN) PowerPAD - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Type | Current Feedback, single | Current Feedback, single | Current Feedback, dual | Voltage Feedback, dual | Voltage Feedback, single |
| Slew Rate | 7000 V/us | 7000 V/us | Same family class (~7000 V/us) | 400 V/us | 400 V/us |
| Bandwidth | 300 MHz (unity gain) | 300 MHz | Same family class (~300 MHz) | 180 MHz | 180 MHz |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | Industrial (I grade) | Industrial (I grade) |
主な差別化要因
- Extreme slew rate for fast large-signal pulses （vs THS4061IDGNR)
- Same footprint with a lower-cost VFB fallback （vs THS4061IDGNR)
- Dual-channel upgrade path on the same die family （vs THS3062DGN)
設計ノート
Solder the PowerPAD under the DGN package to a solid ground plane with an array of thermal vias. This exposed pad is the primary thermal and low-inductance ground return for the amplifier; omitting it raises junction temperature and degrades high-frequency performance. Follow the TI datasheet PowerPAD layout section for recommended via pattern and pad dimensions.
Do not design the feedback network as if this were a voltage-feedback amplifier. In the THS3061 current-feedback topology, the feedback resistor RF sets the closed-loop bandwidth and stability: use the RF value recommended in the TI datasheet for your gain setting. A capacitor directly at the inverting input node (even a few pF of stray capacitance) reduces phase margin and can cause peaking or oscillation; keep that node's traces short and avoid sockets.
Decouple each supply pin (pins 3/4 for V- and pin 6 for V+) with low-ESR ceramic capacitors, e.g. 6.8 uF bulk plus 0.1 uF high-frequency bypass placed within a few millimeters of the pins. Estimated: at +/-15 V supplies and +/-145 mA peak output, transient supply currents are large; inadequate decoupling causes ringing on fast edges and may couple slew-rate transients into adjacent analog circuitry through supply impedance.
Estimated: driving +/-145 mA into 50 ohm loads from +/-15 V rails can dissipate on the order of (V+ - VOUT) * IOUT per side during sustained output; at high duty cycles this approaches hundreds of milliwatts. With the PowerPAD properly soldered to a multi-via ground plane, junction rise is manageable; without it, the small DGN thermal pad cannot remove the heat and the -40C to +85C ambient rating may be exceeded.
Use 50-ohm back-termination (series resistor at the output) when driving coaxial cables, and route the feedback trace as a short, direct connection with a ground guard beneath. For gains above the minimum stable gain, increase RF per datasheet guidance rather than adding loop capacitance, which preserves the 0.1 dB flatness bandwidth of 120 MHz at G=2 and keeps HD2 near the -81 dBc specification.
コンプライアンス情報
Compliance data not present in provided verified web data; the G4 suffix variant (THS3061DGNG4) is TI's green packaging designation. Confirm current RoHS/REACH status on ti.com.
