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Texas Instruments THS4081CDR
- Part No.:
- THS4081CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4081CDR.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,456
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Product details
Overview
THS4081CDR from Texas Instruments is a single-channel, ultralow-power, high-speed voltage-feedback operational amplifier optimized for video and communication signal conditioning. It delivers 175 MHz bandwidth (G = 1), 230 V/µs slew rate, 43 ns settling time (0.1%), 85 mA output drive, and −64 dBc THD at 1 MHz into 150 Ω - enabling high-fidelity analog video distribution and broadband signal amplification in ±5 V to ±15 V systems.
For engineers reviewing the THS4081CDR datasheet, THS4081CDR pinout, THS4081CDR application, or THS4081CDR equivalent, key selection criteria include low quiescent current (3.4 mA/channel), differential gain/phase accuracy (0.01%/0.05°), wide supply range, SOIC-8 package compatibility, and thermal performance with PowerPAD™ option.
Technical Context
The THS4081CDR employs a dielectrically isolated complementary bipolar process with GHz fT transistors, enabling voltage-feedback architecture with high open-loop gain (>10 V/mV) and stable unity-gain operation. Its internal compensation targets maximum bandwidth and slew rate, requiring external series output resistance (>20 Ω) when driving >10 pF capacitive loads to maintain phase margin.
It supports dual-supply (±5 V to ±15 V) or single-supply (10 V to 30 V) operation, with rail-to-rail input common-mode range (±13.8 V at ±15 V) and output swing up to ±13.8 V into 1 kΩ. CMRR exceeds 78 dB across temperature, and PSRR remains >79 dB up to 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (−3 dB) | 175 MHz at ±15 V, G = 1 - enables full HD video baseband amplification without attenuation |
| Slew rate | 230 V/µs at ±15 V - supports fast transient response for pulse and composite video signals |
| Settling time (0.1%) | 43 ns at ±15 V, 5-V step - ensures accurate pixel-level timing in high-speed data acquisition |
| Total harmonic distortion | −64 dBc at 1 MHz, 2 VPP, 150 Ω - meets broadcast-grade video linearity requirements |
| Supply current per channel | 3.4 mA typical at ±15 V - allows multi-amplifier designs with minimal thermal load |
| Differential gain/phase error | 0.01% / 0.05° at NTSC, ±15 V - preserves color fidelity in analog video transmission |
| Output drive capability | 85 mA typical into 20 Ω - drives 75 Ω coaxial lines directly with series termination |
Pinout & Package
The THS4081CDR is supplied in an 8-pin SOIC (D) package with exposed thermal pad (PowerPAD™ option not applicable to CDR suffix; DGN is separate part). Pin 1 is NC (no internal connection), supporting layout flexibility and noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; may be left floating or grounded for EMI reduction |
| 2 (IN−) | Inverting input | High-impedance node for feedback network connection; sensitive to stray capacitance |
| 3 (IN+) | Non-inverting input | High-impedance node; requires matched trace length to IN− for common-mode rejection |
| 4 (VCC−) | Negative supply rail | Return path for internal biasing; must be decoupled with 0.1 µF ceramic + 6.8 µF tantalum |
| 5 (NC) | No internal connection | Unused pin; electrically isolated; no routing required |
| 6 (OUT) | Amplifier output | Capable of sourcing/sinking 85 mA; requires series resistor ≥20 Ω for >10 pF loads |
| 7 (VCC+) | Positive supply rail | Primary power input; decoupling identical to VCC−; shared ground plane recommended |
| 8 (NC) | No internal connection | Unused pin; maintains symmetry; may be tied to ground if needed for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables thermally constrained video front-ends and portable instrumentation |
| Video-optimized AC performance | 35 MHz 0.1 dB flatness and 0.01%/0.05° differential gain/phase meet SMPTE/ITU-R BT.601 video standards |
| High output current drive | 85 mA typical into 20 Ω supports direct 75 Ω line driving with minimal external components |
| Wide supply voltage range | Operates from ±5 V to ±15 V dual or 10 V–30 V single supply - simplifies system-level power architecture |
| Thermal enhancement ready | SOIC-8 footprint compatible with PowerPAD™ DGN variant (THS4081CDGN) for 2.14 W power dissipation |
Applications
| SD/HD Video Distribution | Broadband Signal Amplification |
|---|---|
Use Scenario: Amplifying and distributing composite or component analog video signals across multiple monitors or recording devices in broadcast studios. IC Role / Device Role / Timing Role: High-fidelity buffer and driver stage preserving luminance/chrominance integrity and sync timing. Use Value: 0.01% differential gain error and 175 MHz bandwidth ensure no visible color shift or edge ringing on 1080i displays. | Use Scenario: Boosting intermediate-frequency (IF) or baseband signals in software-defined radio (SDR) receiver chains before ADC sampling. IC Role / Device Role / Timing Role: Wideband gain block with fast settling to support high-dynamic-range, multi-MHz sampling. Use Value: 43 ns settling time and −64 dBc THD at 1 MHz enable clean digitization of 10+ MHz IF signals with >60 dB SFDR. |
| Test & Measurement Front-Ends | Medical Imaging Signal Conditioning |
Use Scenario: Driving high-impedance oscilloscope inputs or active probes in automated test equipment (ATE) with minimal loading. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer isolating DUT from measurement instrument input capacitance. Use Value: 10 nV/√Hz input voltage noise and 230 V/µs slew rate preserve fast edge fidelity and SNR in sub-ns rise-time measurements. | Use Scenario: Amplifying low-level ultrasound transducer outputs or MRI gradient coil feedback signals in diagnostic imaging systems. IC Role / Device Role / Timing Role: Precision, low-distortion gain stage maintaining signal integrity across 1–10 MHz medical frequency bands. Use Value: −79 dBc THD into 1 kΩ and 0.05° differential phase minimize harmonic artifacts in real-time B-mode image reconstruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4031CD | Lower bandwidth (100 MHz), higher noise (13 nV/√Hz), 100 mA IO, 10 mA ICC | Better suited for low-noise, medium-speed precision amplification where power is less constrained | Select THS4031CD when THD < −75 dBc and 100 MHz BW suffice, and higher supply current is acceptable |
| THS4051CD | 70 MHz bandwidth, 120 V/µs slew rate, 3.5 mA ICC, −58 dBc THD at 1 MHz | Targeted at cost-sensitive, lower-bandwidth video and general-purpose analog signal paths | Choose THS4051CD for legacy SD video or industrial sensor interfaces where 70 MHz BW meets requirement |
Compared with THS4081CDR, THS4031CD trades 75 MHz bandwidth and 6.6 mA extra quiescent current for improved DC precision and higher output current, while THS4051CD offers 30% lower cost and power at the expense of video-grade linearity and speed.
Availability
THS4081CDR is available at Aetrix Electronics and suitable for SD/HD video distribution, broadband signal amplification, test & measurement front-ends, and medical imaging signal conditioning requiring stable component supply and long-term industrial availability.
Supply support for THS4081CDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance analog ICs for industrial, automotive, and communications markets.
The THS4081CDR belongs to TI's high-speed voltage-feedback op-amp product line, engineered specifically for demanding video, instrumentation, and broadband signal-chain applications where speed, linearity, and low power coexist.
FAQ
What is the maximum supply voltage for the THS4081CDR?
The THS4081CDR supports dual-supply operation up to ±16.5 V absolute maximum, with recommended operating range of ±5 V to ±15 V. Exceeding ±16.5 V risks permanent damage per absolute maximum ratings. At ±15 V, it delivers full 175 MHz bandwidth and 230 V/µs slew rate - the rated performance envelope.
Does the THS4081CDR require external compensation for unity-gain stability?
No, the THS4081CDR is internally compensated for unity-gain stability. However, its compensation is optimized for bandwidth and slew rate, making it susceptible to oscillation when driving >10 pF capacitive loads. A minimum 20 Ω series resistor at the output is required in such cases to restore phase margin - confirmed in the official datasheet Figure 41.
Can the THS4081CDR drive a 75 Ω coaxial cable directly?
Yes, the THS4081CDR can drive a 75 Ω coaxial cable directly when configured with appropriate series output termination. With 85 mA output current capability and ±13.8 V swing into 1 kΩ, it supports 75 Ω source termination (e.g., 75 Ω resistor in series with OUT) while maintaining signal integrity and minimizing reflections - a standard practice validated in video applications.
What is the thermal performance difference between THS4081CDR and THS4081CDGN?
The THS4081CDR uses standard SOIC-8 (D) packaging with θJA = 167 °C/W (JEDEC Low-K board), limiting power dissipation to 740 mW at TA = 25 °C. In contrast, THS4081CDGN uses PowerPAD™ MSOP-8 (DGN) with θJA = 58.4 °C/W and θJC = 4.7 °C/W, enabling 2.14 W dissipation - a 2.9× improvement ideal for high-output continuous operation.
Is the THS4081CDR suitable for single-supply operation?
Yes, the THS4081CDR supports single-supply operation from 10 V to 30 V. Its input common-mode range extends to within 1.2 V of V− and V+, and output swing reaches within 1.2 V of rails under typical loads. For 24 V single-supply use, design considerations include biasing the IN+ node to mid-rail and verifying PSRR (>79 dB) remains sufficient at target frequencies.
THS4081CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 230V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 175 MHz
- Current - Input Bias:
- 1.2 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 3.4mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4081CDR FAQ
1.How can I place an order for THS4081CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081CDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for THS4081CDR reliable?
The price and inventory of THS4081CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081CDR is usually 5 days.
3.What payment methods are accepted for THS4081CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081CDR?
THS4081CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081CDR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for THS4081CDR?
For technical support, including THS4081CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081CDR requirements.
6.How does Aetrix verify that THS4081CDR is sourced from the original manufacturer or authorized distributors?
All THS4081CDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that THS4081CDR meets industry standards.
7.What is the process for return or replacement of THS4081CDR?
All THS4081CDR units undergo pre-shipment inspection (PSI). If there is an issue with THS4081CDR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The THS4081CDR part is unused and in its original packaging.
Return procedure for THS4081CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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