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Texas Instruments THS4081CDGNR
- Part No.:
- THS4081CDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4081CDGNR.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,930
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Product details
Overview
THS4081CDGNR 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 (−3 dB, G = 1), 230 V/µs slew rate, and 43 ns settling time (0.1%), with 3.4 mA quiescent current per channel and ±15 V supply capability - enabling low-power HD video driver and high-fidelity analog front-end applications.
For engineers reviewing the THS4081CDGNR datasheet, THS4081CDGNR pinout, THS4081CDGNR application, or THS4081CDGNR equivalent, this page provides verified technical context, package-specific thermal design guidance, real-world video distortion metrics (0.01% differential gain), and validated alternative options for high-speed op-amp selection in broadcast, test equipment, and medical imaging systems.
Technical Context
The THS4081CDGNR employs a dielectrically isolated complementary bipolar process with GHz fT transistors, enabling voltage-feedback architecture with wide open-loop bandwidth and fast transient response. Its internal compensation targets maximum small-signal speed while requiring external series output resistance (>20 Ω) for stable operation into capacitive loads >10 pF.
Designed for dual-supply (±5 V to ±15 V) or single-supply (10 V to 30 V) operation, it features rail-to-rail input common-mode range (±13.8 V at ±15 V), 85 mA output drive, and integrated ESD protection. The DGN package's exposed thermal pad enables 2.14 W power dissipation at TA = 25 °C via direct PCB copper conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 175 MHz at ±15 V, G = 1 - supports full HD (1080p60) baseband video amplification without gain peaking. |
| Slew Rate | 230 V/µs at ±15 V - ensures faithful reproduction of fast-edged digital video sync pulses and composite waveforms. |
| Settling Time (0.1%) | 43 ns at ±15 V, 5-V step - meets tight timing windows in high-speed data acquisition and ADC buffer stages. |
| Differential Gain/Phase | 0.01% / 0.05° at NTSC, ±15 V - preserves color fidelity in professional video routing and distribution equipment. |
| THD | −64 dBc at 1 MHz, RL = 150 Ω - maintains signal integrity in RF IF-stages and broadband instrumentation amplifiers. |
| Quiescent Current | 3.4 mA per channel at ±15 V - enables multi-channel portable test gear with extended battery life. |
| Supply Range | ±5 V to ±15 V dual or 10 V to 30 V single - simplifies system-level power architecture across industrial and broadcast platforms. |
Pinout & Package
The THS4081CDGNR is housed in an 8-pin MSOP PowerPAD™ (DGN) package with an electrically isolated thermal pad on the underside for enhanced thermal management. The package footprint measures 3.0 mm × 3.0 mm with 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must be left floating or tied to ground per layout best practice to minimize parasitic coupling. |
| 2 (IN−) | Inverting input | High-impedance node accepting feedback network; requires shortest possible trace to minimize phase shift and instability. |
| 3 (IN+) | Non-inverting input | High-impedance node for signal source; benefits from local RC filtering (e.g., 100 Ω + 100 pF) to suppress RF interference. |
| 4 (VCC−) | Negative supply rail | Must be decoupled with 0.1 µF ceramic + 6.8 µF tantalum placed ≤0.1 inch from pin to ensure stability at >100 MHz. |
| 5 (NC) | No internal connection | Unused pin; same handling as Pin 1 - avoid routing signals nearby to prevent crosstalk. |
| 6 (OUT) | Amplifier output | Capable of ±13.6 V swing into 250 Ω; requires ≥20 Ω series resistor when driving >10 pF load to maintain phase margin. |
| 7 (VCC+) | Positive supply rail | Identical decoupling requirement as VCC−; shared bulk capacitor permissible if multiple THS4081CDGNR devices are used. |
| 8 (NC) | No internal connection | Unused pin; thermal pad soldering must not short to any NC pin due to isolation specification. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables 4-channel portable oscilloscope front-ends with <14 mA total supply draw. |
| PowerPAD™ thermal enhancement | θJA = 58.4 °C/W allows 2.14 W dissipation at TA = 25 °C - eliminates need for external heatsinks in compact video modules. |
| Video-optimized distortion performance | 0.01% differential gain error preserves chroma amplitude accuracy in SDI/HDMI repeater designs across temperature. |
| High output drive capability | 85 mA continuous output current supports direct driving of 75 Ω coaxial cables without external buffers in broadcast infrastructure. |
| Wide supply flexibility | Operates from ±5 V to ±15 V dual or 10–30 V single supply - reduces BOM count in mixed-voltage test equipment chassis. |
Applications
| Professional Video Routing | Broadcast Signal Distribution |
|---|---|
Use Scenario: Amplifying and distributing composite NTSC/PAL video signals across multi-monitor production switchers. IC Role / Device Role / Timing Role: High-fidelity unity-gain buffer with minimal group delay variation across 0–35 MHz (0.1 dB flatness). Use Value: Maintains 0.01% differential gain and 0.05° differential phase to prevent hue/saturation shift between routed outputs. | Use Scenario: Driving long-haul 75 Ω coaxial runs from camera control units to vision mixers. IC Role / Device Role / Timing Role: Output line driver delivering 85 mA into 75 Ω with 230 V/µs slew rate to preserve sync pulse edges. Use Value: Eliminates need for discrete emitter-follower buffers, reducing board area by 40% and improving rise-time consistency. |
| Medical Ultrasound Imaging | Automated Test Equipment |
Use Scenario: Conditioning analog beamformed echo signals before digitization in portable ultrasound probes. IC Role / Device Role / Timing Role: Low-noise (10 nV/√Hz), low-distortion (−64 dBc THD) gain stage operating at ±5 V for battery-powered systems. Use Value: Enables 12-bit ENOB preservation up to 10 MHz without additional noise filtering, extending probe battery life. | Use Scenario: High-speed waveform generation and capture in PXI-based ATE platforms. IC Role / Device Role / Timing Role: Fast-settling (43 ns, 0.1%) output amplifier for arbitrary waveform generator DAC buffers. Use Value: Reduces settling-induced measurement uncertainty to <0.05% in 100 MS/s sampling systems. |
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 |
|---|---|---|---|
| THS4031CDGNR | 100 MHz bandwidth, 100 V/µs slew rate, 2.5 mA IQ; lower speed but 30% lower power. | Better suited for medium-bandwidth video (e.g., VGA, DVI TMDS clock recovery) where 175 MHz is excessive. | Select when system bandwidth requirement is ≤100 MHz and ultra-low power (<3 mA/channel) is prioritized over settling speed. |
| THS4051CDGNR | 70 MHz bandwidth, 85 V/µs slew rate, 2.3 mA IQ; lowest power in family but reduced video fidelity (0.03% DG). | Ideal for cost-sensitive consumer video interfaces (e.g., CVBS output in set-top boxes) with relaxed distortion specs. | Choose for non-broadcast applications where differential gain <0.02% is not required and supply current must be minimized. |
Compared with THS4031CDGNR and THS4051CDGNR, the THS4081CDGNR trades higher quiescent current for 1.75× greater bandwidth and 2.7× faster slew rate - making it the only option among the three capable of preserving sub-100 ps edge fidelity in HD video sync paths.
Availability
THS4081CDGNR is available at Aetrix Electronics and suitable for professional video routing, broadcast signal distribution, medical ultrasound imaging, and automated test equipment requiring stable component supply across industrial temperature ranges (0°C to 70°C).
Supply support for THS4081CDGNR 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 and embedded processing technologies, with over 90 years of innovation in high-performance signal chain solutions.
The THS4081CDGNR belongs to TI's THS408x high-speed op-amp product line, engineered specifically for demanding video, communications, and instrumentation applications where bandwidth, distortion, and power efficiency must coexist.
FAQ
What is the maximum safe capacitive load for THS4081CDGNR without external compensation?
The THS4081CDGNR is internally compensated for optimal bandwidth but becomes unstable with capacitive loads exceeding 10 pF directly at the output. To drive larger loads (e.g., 75 Ω coaxial cable with ~50 pF/m capacitance), a minimum 20 Ω series resistor must be placed between the OUT pin and the load. This isolates the capacitance and restores phase margin - confirmed in TI's Application Information section Figure 41.
Does THS4081CDGNR support single-supply operation, and what is the minimum recommended voltage?
Yes, THS4081CDGNR supports true single-supply operation from 10 V to 30 V. At 10 V, the device maintains functional output swing (±3.4 V into 150 Ω) and specified distortion performance. For rail-to-rail input operation, the common-mode range extends to within 1.2 V of each rail - enabling use in 12 V systems with mid-supply biasing for AC-coupled video signals.
How does the PowerPAD™ thermal pad on THS4081CDGNR affect PCB layout requirements?
The THS4081CDGNR's exposed thermal pad (68 mil × 70 mil) must be soldered to a dedicated PCB copper area connected via ≥5 x 13-mil vias to an internal ground plane. Unlike standard MSOP packages, omitting this thermal path degrades θJA from 58.4 °C/W to >100 °C/W, risking thermal shutdown above 1.2 W dissipation. TI Application Note SLOS274D Figure 45 specifies exact etch and via geometry.
Can THS4081CDGNR replace THS4081CD in existing designs, and what layout changes are needed?
Yes, THS4081CDGNR is a direct drop-in replacement for THS4081CD in terms of pinout and electrical specifications. However, the DGN package's thermal pad requires PCB land pattern revision: the footprint must include solderable copper for the pad and five 13-mil vias. No changes to signal routing, decoupling, or feedback networks are necessary - confirmed in TI's "AVAILABLE OPTIONS" table showing identical AC/DC performance across D and DGN packages.
What evaluation module is available for THS4081CDGNR, and what does it demonstrate?
The THS4081EVM (Evaluation Module) is the official TI platform for THS4081CDGNR characterization. It demonstrates proper PowerPAD™ thermal layout, optimized high-frequency decoupling (0.1 µF ceramic + 6.8 µF tantalum per rail), and 75 Ω video termination schemes. The board includes test points for measuring differential gain/phase per SMPTE RP-168 and supports both single- and dual-supply configurations - documented in TI's THS4081EVM User's Guide (SLAU140).
THS4081CDGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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:
- -
- 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-HVSSOP
THS4081CDGNR FAQ
1.How can I place an order for THS4081CDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081CDGNR 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 THS4081CDGNR reliable?
The price and inventory of THS4081CDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081CDGNR is usually 5 days.
3.What payment methods are accepted for THS4081CDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081CDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081CDGNR?
THS4081CDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081CDGNR 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 THS4081CDGNR?
For technical support, including THS4081CDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081CDGNR requirements.
6.How does Aetrix verify that THS4081CDGNR is sourced from the original manufacturer or authorized distributors?
All THS4081CDGNR 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 THS4081CDGNR meets industry standards.
7.What is the process for return or replacement of THS4081CDGNR?
All THS4081CDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4081CDGNR, 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 THS4081CDGNR part is unused and in its original packaging.
Return procedure for THS4081CDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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