THS4012CD - 290MHz Dual High-Speed Amplifier | Texas Instruments
MPN： THS4012CD ✓ 啟用中THS4012CD 概覽
A high-speed voltage-feedback amplifier is a voltage-input amplifier that uses negative feedback to control gain and bandwidth. The THS4012 belongs to the operational-amplifier hierarchy within analog and mixed-signal semiconductors. Its voltage-feedback architecture supports signal conditioning, active filtering, video processing, communications, instrumentation, and test-equipment applications where conventional general-purpose amplifiers cannot provide sufficient bandwidth or slew rate.
Key performance characteristics include 290 MHz small-signal bandwidth, 310 V/µs slew rate, and 37 ns settling time to 0.1%. The dual amplifier also provides 110 mA typical output-current drive, 7.8 mA supply current per channel, 7.5 nV/√Hz voltage-noise density, and low distortion characterized by THD of −80 dBc at 1 MHz. These specifications make the THS4012CD suitable for preserving high-amplitude, high-frequency waveforms without excessive slew distortion.
The THS4012 family is specifically positioned for low-distortion and high-speed applications. Its 290 MHz bandwidth supports wideband video and communications paths, while the 310 V/µs slew rate permits rapid transitions through large voltage swings. The 37 ns settling time is useful in pulse, waveform-generation, and feedback-control systems that need signals to stabilize rapidly after a transition. Dual-channel operation also reduces the number of amplifiers required when two independent channels are needed.
Typical applications include professional video equipment, communications receivers, high-speed instrumentation, active filters, signal conditioners, pulse-processing circuits, and wideband test systems. Two amplifiers can be configured independently for dual-channel processing or together for differential and other multichannel signal-chain functions. The 8-pin SOIC package supports conventional surface-mount assembly while keeping the implementation compact.
Designers should preserve the feedback network and input/output impedance assumptions associated with the manufacturer’s recommended high-speed layout. Short feedback paths, careful grounding, controlled supply bypassing, and separation of sensitive inputs from output and supply traces help maintain stability and low distortion. Differential impedance and termination values should be calculated from the actual line standard rather than inferred solely from the 290 MHz bandwidth.
This product page combines the manufacturer’s device characteristics with practical application guidance, package information, and verified drop-in alternatives. It is intended to help engineers evaluate the THS4012CD for bandwidth, distortion, output-drive, supply, layout, and replacement requirements before committing to an 8-pin SOIC design.
直接替換替代品，適用於 THS4012CD — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： THS4012CD （相同外形與佔位） — 差異在於 Amplifier Type, Output Current Drive, Package, Slew Rate, Total Harmonic Distortion.
THS4012ID
✅ 直接替換聯絡詢價
查看資料表 →THS4012IDG4
✅ 直接替換📋 參考替代品（不在目錄中）
AD8055
✅ 直接替換📋 參考替代品（不在目錄中）
THS4012CD 最大額定值與電氣特性
| Amplifier Type | Dual low-distortion voltage-feedback amplifier |
| Number of Amplifier Channels | 2 channels |
| Small-Signal Bandwidth | 290 MHz |
| Slew Rate | 310 V/µs |
| Settling Time | 37 ns to 0.1% |
| Total Harmonic Distortion | −80 dBc at 1 MHz |
| Voltage-Noise Density | 7.5 nV/√Hz |
| Video Performance Bandwidth | 70 MHz |
| Output Current Drive | 110 mA typical |
| 供應電流 | 7.8 mA per channel |
| Supply Voltage Range | ±4.5 V to ±16 V |
| 封裝 | 8-pin SOIC |
| 安裝類型 | Surface mount |
THS4012CD 8-pin soic 腳位配置指南
THS4012CD（8-pin soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： THS4012CD.
請參閱 資料表 以查看完整腳位配置。
典型應用
THS4012CD 適用於 6 應用s: Professional Video Signal Conditioning, Communications Receiver Front End, High-Speed Active Filters, Pulse and Waveform Processing, Precision Test and Measurement, Audio and Data Acquisition Analog Front End.
Professional Video Signal Conditioning
The THS4012CD fits professional video amplification because Texas Instruments specifies 70 MHz video-performance bandwidth, 290 MHz small-signal bandwidth, and low distortion of −80 dBc at 1 MHz. Its 310 V/µs slew rate helps preserve edge transitions, while 110 mA typical output drive provides useful margin for terminated video paths. Place the amplifier close to the source and load, terminate the line according to the actual video standard, and use short feedback paths to limit parasitic feedback. Verify output swing, channel-to-channel behavior, and gain stability at the selected supply voltage before fixing the circuit.
推薦
Communications Receiver Front End
The THS4012CD is appropriate for intermediate-frequency or wideband communications signal conditioning where 290 MHz bandwidth and 310 V/µs slew rate are important. The 7.5 nV/√Hz voltage-noise density supports low-amplitude signal handling, and the dual configuration provides two independent amplifier channels where needed. Use the amplifier as a voltage-feedback stage with feedback values selected for the intended gain and bandwidth. Keep the input network, mixer or filter output, and amplifier input closely coupled, while providing local bypassing that prevents supply ripple from appearing directly at the signal input.
推薦
High-Speed Active Filters
The THS4012CD can implement active filtering when filter poles must remain high while maintaining useful output-drive capability. Its 290 MHz bandwidth provides headroom above the signal band of interest, and the 310 V/µs slew rate limits large-signal distortion when the filter processes high-amplitude or fast-edge signals. Calculate component tolerances against the desired cutoff and stopband attenuation, then verify phase margin in the actual loading condition. Place filter components close to the amplifier pins and avoid routing feedback and summing nodes through long traces that could add phase shift.
推薦
Pulse and Waveform Processing
The THS4012CD suits pulse conditioning and waveform-processing circuits because its 37 ns settling time to 0.1% and 310 V/µs slew rate support rapid transitions. The dual-amplifier architecture allows a signal to be conditioned and then monitored or inverted within one package. Choose resistor and capacitor values that preserve stability at the required gain, and account for the amplifier’s finite output drive when driving long cables, backplanes, or capacitive probe inputs. Add series isolation near the output where needed, but keep the feedback loop compact and separate from those protected output paths.
推薦
Precision Test and Measurement
The THS4012CD can serve as a front-end amplifier in high-speed test and measurement equipment where signal bandwidth, output drive, and low distortion determine measurement fidelity. Its 290 MHz bandwidth handles substantially faster signals than general-purpose amplifiers, while 110 mA typical output drive supports terminated and moderately capacitive loads. Place the amplifier near the connector or probe interface to minimize losses, maintain a short ground return, and decouple each supply rail close to the device. Validate gain flatness, step-response settling, and output compliance for every signal amplitude used in the test plan.
推薦
Audio and Data Acquisition Analog Front End
The THS4012CD can drive the analog input stage of a data-acquisition system when wider bandwidth and faster settling are required than conventional low-noise amplifiers provide. The dual configuration can condition two channels, and its 7.5 nV/√Hz noise density supports the high-speed input architecture. Use the device where the anti-alias filter or sensor output does not require a slower settling response. Keep the sensor, filter, and amplifier paths short and use local supply bypassing to prevent digital activity from coupling into the input. Confirm that the selected ADC input range matches the amplifier’s output swing and common-mode limits.
推薦
推薦產品摘要
工程參考資料，適用於 THS4012CD — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | THS4012ID | THS4012IDG4 | AD8055 |
|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Amplifier Configuration | Dual voltage-feedback amplifier | Dual voltage-feedback amplifier | Dual voltage-feedback amplifier | Dual high-speed low-distortion amplifier |
主要差異化特點
- High-speed dual-channel operation with documented fast settling (對比THS4012ID)
- Documented video performance and low distortion (對比AD8055)
- Strong output-current capability for high-speed signal paths (對比THS4012IDG4)
設計說明
Place the THS4012CD close to the signal source and load, and keep both input and feedback traces short. High-speed parasitic capacitance can alter effective gain and phase margin, while parasitic inductance in feedback connections can degrade damping and settling. Use a continuous ground plane where practical, avoid routing sensitive inputs beside the output or supply pins, and place compensation or termination components directly at their associated amplifier pins.
Decouple each supply rail close to the device and preserve a low-impedance return for every bypass capacitor. The THS4012CD operates from ±4.5 V to ±16 V, but acceptable output swing also depends on supply headroom, gain, and load. Verify the required common-mode and output ranges in the manufacturer’s operating conditions. When both positive and negative rails are used, decouple them independently and check that rail sequencing does not create an unexpected operating condition.
Calculate source and load impedances at the signal frequencies of interest rather than treating the 290 MHz bandwidth as a direct impedance capability. A transmission-line source or cable may require matching termination, while a capacitive load can require isolation or a stability check. Include the connector, cable, probe, and termination in the system-level bandwidth and settling evaluation, particularly when the output-current drive of 110 mA is being used with long interconnects.
Do not assume that the 37 ns settling-time specification applies to every gain, load, and output-amplitude condition. Review the manufacturer’s test conditions, observe the 0.1% settling criterion, and evaluate gain-bandwidth behavior for the selected feedback network. Likewise, do not use the single-channel OPA847 as a direct two-channel PCB replacement for the THS4012CD because it does not provide the same dual-amplifier configuration and pin allocation.
合規資訊
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was established for THS4012CD from the available manufacturer and distributor information. G4 suffix variants should not be assumed to provide a specific compliance qualification without the associated manufacturer documentation.