THS4082CD - 175MHz Dual Voltage-Feedback Amplifier | Texas Instruments
MPN: THS4082CD ✓ نشطTHS4082CD نظرة عامة
An operational amplifier is an analog signal-conditioning semiconductor that uses high open-loop gain to amplify voltage differences between its inputs. The THS4082 belongs to the voltage-feedback amplifier family within the broader operational-amplifier, analog-IC, and semiconductor hierarchies. Unlike a current-feedback amplifier, a voltage-feedback amplifier generally uses feedback-network resistance and capacitance to establish gain and bandwidth, making it suitable for high-speed instrumentation and video signal paths.
The main performance features include 175 MHz bandwidth, 230 V/us slew rate, 43 ns settling time to 0.1%, 85 mA typical output drive, and 35 MHz video bandwidth with 0.1 dB differential gain error and 0.05 degrees differential phase. Dual-channel architecture reduces package count and simplifies balanced or multi-stage signal conditioning. The dual voltage-feedback topology is particularly useful in communication and video equipment where accurate high-frequency amplification must coexist with low power consumption.
The amplifier operates from a dual supply of up to plus or minus 16.5 V, corresponding to a total span of 33 V. Its wide bandwidth makes it capable of processing signals well beyond conventional audio frequencies, while the 3.4 mA per-channel quiescent current limits the power burden when both channels are active. The 85 mA output-drive specification also provides margin for driving downstream stages and PCB capacitance, although load current and stability still require careful evaluation.
Typical uses include video processing, communication-signal conditioning, active filtering, test and measurement equipment, and general high-speed analog amplification. In a video path, one channel can amplify luminance or chroma information while the other handles a second signal. In instrumentation, the dual package can implement gain, filtering, or drive stages around higher-speed converters and sensors. The 35 MHz video bandwidth specification supports video-frequency signal chains requiring controlled gain and phase performance.
Circuit design should preserve the amplifier's high-speed behavior by using a low-inductance ground plane, short feedback paths, and decoupling close to the supply pins. Resistor and capacitor selection around the feedback network directly affects gain accuracy and stability. Board-level parasitics, load capacitance, and output-current demand can influence overshoot and settling, so oscilloscope verification with the intended trace geometry is recommended.
This product page combines the manufacturer's ordering information with a parameter-by-parameter comparison, drop-in replacement assessment, application guidance, and practical PCB design notes. It is intended to help engineers distinguish the THS4082CD from temperature-grade, packaging, and competing dual-amplifier options before committing a high-speed analog design to production.
بدائل مباشرة لـ THS4082CD — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
THS4082CDG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
THS4082IDG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
THS4082IDRG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
THS4082CD الحدود القصوى والخصائص الكهربائية
| Amplifier Type | Voltage-feedback amplifier |
| Number of Channels | 2 channels |
| Small-Signal Bandwidth | 175 MHz (-3 dB) |
| Slew Rate | 230 V/us |
| تيار السكون | 3.4 mA per channel |
| Output Drive Current | 85 mA typical |
| Settling Time | 43 ns to 0.1% |
| Video Bandwidth | 35 MHz at 0.1 dB differential gain |
| Differential Gain Error | 0.1 dB at 35 MHz |
| Differential Phase | 0.05 degrees at 35 MHz |
| Supply Voltage Range | Up to plus or minus 16.5 V (33 V total span) |
| نطاق درجة حرارة التشغيل | 0 C to 70 C |
| العلبة | 8-pin SOIC (D) |
| نوع التركيب | Surface mount |
| Product Type | Low-power high-speed dual operational amplifier |
تكوين أطراف THS4082CD
| دبوس 1 | OUTA — Output of amplifier A |
| دبوس 2 | INA- — Inverting input of amplifier A |
| دبوس 3 | INA+ — Noninverting input of amplifier A |
| دبوس 4 | V- — Negative supply connection |
| دبوس 5 | INB+ — Noninverting input of amplifier B |
| دبوس 6 | INB- — Inverting input of amplifier B |
| دبوس 7 | OUTB — Output of amplifier B |
| دبوس 8 | V+ — Positive supply connection |
التطبيقات النموذجية
THS4082CD مناسب لـ 6 التطبيقs: Video Signal Conditioning, Communication Front-End Amplification, Active Video Filters, Test and Measurement Instrumentation, Data Converter Signal Conditioning, Industrial Control and Sensor Interfaces.
Video Signal Conditioning
The THS4082CD fits dual video paths requiring 175 MHz small-signal bandwidth, 230 V/us slew rate, and low 3.4 mA per-channel quiescent current. One channel can amplify a composite or component video signal while the other handles a second stage or auxiliary path. Its specified 35 MHz video bandwidth, 0.1 dB differential gain error, and 0.05-degree differential phase are directly relevant to maintaining amplitude and phase consistency through video circuitry. Use short traces, a continuous ground plane, and local bypassing because these high-speed specifications make layout parasitics significant.
موصى به
Communication Front-End Amplification
The dual THS4082CD is suitable for communication equipment that needs compact, low-power amplification of high-frequency signals. Its 175 MHz bandwidth handles substantially faster waveforms than conventional general-purpose amplifiers, while 230 V/us slew rate limits large-signal distortion when signals change rapidly. Two channels allow a balanced signal path, transmit and receive amplification, or mixer-buffer functions without requiring two packages. Designers should evaluate noise, output swing, and stability against the exact communication bandwidth while retaining the low 3.4 mA per-channel quiescent current.
موصى به
Active Video Filters
The THS4082CD can implement high-order active filtering in video and communication circuits because its 175 MHz bandwidth provides substantial frequency-range margin above a 35 MHz video signal. The dual configuration supports cascaded filter stages, signal conditioning around a converter, or separate channels for multiple video bands. Its 43 ns settling time to 0.1% is valuable when timing and transient behavior matter. Component tolerances and the amplifier's closed-loop response determine the final filter accuracy, so simulate the complete network and verify stability on the physical PCB.
موصى به
Test and Measurement Instrumentation
The THS4082CD fits instrumentation requiring accurate, fast signal conditioning with two channels in a compact footprint. Its 175 MHz bandwidth, 230 V/us slew rate, and 85 mA typical output-drive current make it useful for buffer and gain stages feeding converters, analyzers, or data-acquisition systems. The low 3.4 mA per-channel quiescent current helps when both channels remain active in portable or multi-channel equipment. Probe loading, cable capacitance, and measurement bandwidth must be included in the design because they can affect observed gain, settling, and output-current demand.
موصى به
Data Converter Signal Conditioning
The THS4082CD is appropriate for high-speed amplifier stages placed before or after suitable data converters, particularly where low distortion and rapid settling are important. A 175 MHz bandwidth supports demanding analog interfaces, while 230 V/us slew rate provides good large-signal response and 43 ns settling to 0.1% helps preserve time-domain behavior. Both channels can serve separate converter inputs, clock-buffer functions, or output stages. The amplifier's input and output limits must be checked against the converter's common-mode range, supply rails, and required drive level before implementation.
موصى به
Industrial Control and Sensor Interfaces
The dual THS4082CD can amplify and condition signals in industrial sensing and control modules where bandwidth and drive are more important than absolute input-offset precision. Its dual channels reduce component count in gain-and-buffer arrangements, while 85 mA typical output drive can support moderate downstream capacitance and loading. The 3.4 mA per-channel quiescent current is useful in distributed or battery-influenced equipment. Nevertheless, industrial suitability depends on the exact operating temperature, grounding environment, electromagnetic interference conditions, and compliance requirements of the finished system.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ THS4082CD — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | THS4082CDG4 | THS4082IDG4 | THS4082IDRG4 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D) |
| Amplifier Configuration | Dual voltage-feedback amplifier | Dual voltage-feedback amplifier | Dual voltage-feedback amplifier | Dual voltage-feedback amplifier |
| Small-Signal Bandwidth | 175 MHz | 175 MHz | 175 MHz | 175 MHz |
| Slew Rate | 230 V/us | 230 V/us | 230 V/us | 230 V/us |
| Quiescent Current | 3.4 mA per channel | 3.4 mA per channel | 3.4 mA per channel | 3.4 mA per channel |
| Settling Time | 43 ns to 0.1% | 43 ns to 0.1% | 43 ns to 0.1% | 43 ns to 0.1% |
| Output Drive Current | 85 mA typical | 85 mA typical | 85 mA typical | 85 mA typical |
| Video Bandwidth | 35 MHz | 35 MHz | 35 MHz | 35 MHz |
أبرز الفروقات
- Combines two high-speed channels in one package (مقابلTHS4031CD)
- Low quiescent current for 175 MHz operation (مقابلTHS4082IDG4)
- Strong large-signal and transient performance (مقابلTHS4082IDRG4)
ملاحظات التصميم
Place the input, output, feedback, and bypass connections close to the SOIC pins. Use a continuous ground plane, minimize loop area, and avoid routing high-frequency signals beside clock or switching-converter nodes. The 175 MHz bandwidth means trace inductance and capacitance can influence gain, overshoot, and settling. Validate the final layout with an oscilloscope and the actual output-load conditions.
Do not assume that matching the package outline guarantees interchangeable operation. Confirm that the replacement suffix carries the required temperature grade, production status, marking, packing, and orderable configuration. The THS4082CDG4, THS4082IDG4, and THS4082IDRG4 entries share the 8-pin SOIC family footprint, but their ordering attributes should be checked against the production bill of materials.
Estimated: each channel consumes 3.4 mA of quiescent current. With both channels operating at plus or minus 16.5 V, total quiescent power is approximately 224 mW. Actual dissipation rises with output load current and signal activity. Provide local supply bypassing and adequate copper area, and verify temperature rise under the worst-case output waveform rather than relying only on no-load current.
معلومات الامتثال
The product title identifies the G4 ordering variants as associated with Texas Instruments' green-compatible ordering convention, but explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, and AEC-Q100 statements are not included in the verified product information. Compliance must therefore be confirmed from the manufacturer's current product documentation.
