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Texas Instruments THS4081ED
- Part No.:
- THS4081ED
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- -
- Datasheet:
-
THS4081ED.pdf
- Description:
- THS4081 175-MHZ LOW-POWER VOLTAG
- Quantity:
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Inventory:10,151
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Product details
Overview
THS4081ED from Texas Instruments is a single-channel, ultralow-quiescent-current (3.4 mA), 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, and 43 ns settling time (0.1%), with 85 mA output drive and −64 dBc THD at 1 MHz into 150 Ω - enabling high-fidelity analog front-end amplification in broadcast video routing and high-resolution imaging systems.
For engineers reviewing the THS4081ED datasheet, THS4081ED pinout, THS4081ED application, or THS4081ED equivalent, key selection criteria include its low-distortion video performance (0.01% differential gain, 0.05° differential phase), wide ±5 V to ±15 V dual-supply range, thermal-enhanced PowerPAD™ MSOP-8 (DGN) package, and compatibility with 75-Ω transmission line driving via series-output isolation.
Technical Context
The THS4081ED employs a dielectrically isolated complementary bipolar process with multi-GHz fT transistors, enabling voltage-feedback architecture with high open-loop gain (≥10 V/mV at ±15 V), low input bias current (1.2–6 µA), and stable operation under capacitive loads ≥10 pF when using ≥20 Ω series output isolation. Its internal compensation prioritizes bandwidth and slew rate over unity-gain stability with heavy capacitive loading.
Designed for DC-coupled and AC-coupled video paths, it supports both single-supply (10–30 V) and dual-supply (±5 V to ±15 V) configurations, with common-mode input range extending to ±13.8 V (at ±15 V supply) and output swing to ±13.6 V into 250 Ω - ensuring headroom for full-scale NTSC/PAL signal handling without clipping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB, G = 1) | 175 MHz at ±15 V - supports >1080p60 baseband video amplification without gain peaking. |
| Slew Rate | 230 V/µs at ±15 V - enables clean reproduction of fast transient video edges and composite sync pulses. |
| Settling Time (0.1%) | 43 ns at ±15 V - meets tight timing budgets in multi-channel video switchers and ADC driver stages. |
| Total Harmonic Distortion | −64 dBc at 1 MHz, RL = 150 Ω - preserves color fidelity and minimizes cross-color interference in SD/HD video. |
| Differential Gain/Phase | 0.01% / 0.05° at NTSC, ±15 V - satisfies broadcast-grade video spec for minimal hue/saturation shift. |
| Supply Current (per channel) | 3.4 mA typical at ±15 V - enables thermally constrained designs in multi-amplifier video processing modules. |
| Output Drive | 85 mA typical into 20 Ω - drives 75-Ω coaxial lines directly with series resistor matching. |
Pinout & Package
THS4081ED is supplied in the thermally enhanced MSOP-8 PowerPAD™ (DGN) package, featuring an exposed thermal pad on the underside electrically isolated from all terminals. The package enables 2.14 W power dissipation at TA = 25°C (θJA = 58.4°C/W) when properly soldered to a PCB copper area with five 13-mil vias connected to an internal ground plane.
| 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 requiring shortest possible trace length to avoid instability; sensitive to stray capacitance. |
| 3 (IN+) | Non-inverting input | DC-coupled or AC-coupled signal entry point; RC filter (R1/C1) may be added here for anti-aliasing. |
| 4 (VCC−) | Negative supply rail | Connect to −5 V to −15 V; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling within 0.1 inch. |
| 5 (NC) | No internal connection | Unused pin; same handling as Pin 1. |
| 6 (OUT) | Amplified output | Capable of ±13.6 V swing into 250 Ω; series 20–75 Ω resistor required before capacitive loads >10 pF. |
| 7 (VCC+) | Positive supply rail | Connect to +5 V to +15 V; decoupling identical to VCC−; shared ground plane mandatory for PSRR >79 dB. |
| 8 (NC) | No internal connection | Unused pin; no internal bond wire; PCB thermal pad must remain unconnected to any signal net. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables multi-channel video amps in space-constrained, fanless enclosures. |
| 75-Ω line driving capability | 85 mA output drive + internal compensation allows direct interface to coaxial video distribution with 75 Ω series termination. |
| Broadcast-grade video fidelity | 0.01% differential gain and 0.05° differential phase meet SMPTE RP 168 and ITU-R BT.601 requirements. |
| Thermally enhanced PowerPAD™ | DGN package reduces junction-to-ambient thermal resistance by 65% vs. standard SOIC-8, supporting 2.14 W continuous dissipation. |
| Wide supply flexibility | Operates from ±5 V to ±15 V dual supply or 10–30 V single supply - simplifies integration into mixed-voltage video systems. |
Applications
| Video Distribution Amplifier | High-Speed ADC Driver |
|---|---|
Use Scenario: Distribution of uncompressed HD-SDI or component video signals to multiple monitors or recorders without degradation. IC Role / Device Role / Timing Role: Single-ended buffer and level shifter with 75-Ω source termination, preserving rise/fall times and minimizing inter-symbol interference. Use Value: 175 MHz bandwidth and 230 V/µs slew rate maintain edge integrity across 1080p60 signals; 0.01% differential gain prevents visible color shifts over long cable runs. | Use Scenario: Driving the input of 10–14-bit, 50–100 MSPS analog-to-digital converters in medical ultrasound or test equipment front ends. IC Role / Device Role / Timing Role: Low-noise, fast-settling gain stage that conditions sensor signals prior to digitization, minimizing aperture error. Use Value: 43 ns settling time (0.1%) ensures full accuracy before ADC sampling; −64 dBc THD avoids harmonic folding into Nyquist band. |
| Composite Video Reconstruction | RGB Signal Amplifier |
Use Scenario: Reconstructing baseband NTSC/PAL composite video after demodulation or format conversion. IC Role / Device Role / Timing Role: DC-coupled reconstruction amplifier restoring luminance/chrominance amplitude balance and phase alignment. Use Value: 0.01% differential gain and 0.05° differential phase eliminate hue/saturation errors critical for broadcast compliance and professional monitoring. | Use Scenario: Amplifying individual R/G/B channels in digital signage, projector, or broadcast camera signal chains. IC Role / Device Role / Timing Role: High-fidelity, matched-gain channel amplifier maintaining color fidelity and inter-channel timing alignment. Use Value: Matched ac performance across channels (via single-die design) ensures consistent gamma, white balance, and temporal response in RGB pixel pipelines. |
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 (12 nV/√Hz), 100 mA output drive, 5.5 mA quiescent current. | Better suited for general-purpose high-speed buffering where distortion <−60 dBc is sufficient and thermal budget allows higher ICC. | Select THS4031CD only if THS4081ED's 175 MHz bandwidth and −64 dBc THD are not required; verify PSRR (75 dB) and settling time (65 ns) meet system timing. |
| THS4051CD | 70 MHz bandwidth, 150 mA output, 6.5 mA quiescent current, 0.02% differential gain at ±15 V. | Targeted at cost-sensitive video applications with relaxed bandwidth and distortion specs; higher ICC limits channel density. | Choose THS4051CD for legacy SD video systems or non-broadcast applications where 0.02% differential gain is acceptable and thermal management is less constrained. |
Compared with THS4031CD and THS4051CD, THS4081ED provides superior bandwidth, lower distortion, and significantly lower quiescent current - making it the optimal choice for high-density, broadcast-grade video signal paths where thermal headroom and color fidelity are critical.
Availability
THS4081ED is available at Aetrix Electronics and suitable for video distribution amplifiers, high-speed ADC drivers, composite video reconstruction circuits, and RGB signal amplifiers requiring stable component supply across industrial and broadcast production lifecycles.
Supply support for THS4081ED 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 connectivity technologies, with decades of innovation in high-performance op-amps and signal chain solutions.
The THS4081ED belongs to TI's THS408x family of ultralow-power, high-speed voltage-feedback amplifiers designed specifically for demanding video and communications infrastructure applications requiring low distortion, high output drive, and thermal efficiency.
FAQ
What is the maximum supply voltage rating for the THS4081ED?
The THS4081ED has an absolute maximum supply voltage rating of ±16.5 V for dual-supply operation. Operating beyond this limit risks permanent damage. Recommended operating range is ±5 V to ±15 V, with 10–30 V supported for single-supply configurations. Always observe derating curves in the datasheet for extended temperature operation.
Does the THS4081ED require external compensation for stability?
No, the THS4081ED is internally compensated for unity-gain stability under resistive loads. However, when driving capacitive loads exceeding 10 pF, a series resistor (≥20 Ω) must be placed between the output pin and the load to maintain phase margin and prevent ringing or oscillation - as confirmed in the "Driving a Capacitive Load" application section.
Can the THS4081ED be used in single-supply video applications?
Yes, the THS4081ED supports single-supply operation from 10 V to 30 V. For video applications, ensure the input common-mode range (e.g., ±3.8 V at ±5 V supply) and output swing (e.g., ±3.4 V into 150 Ω) are compatible with signal levels. AC-coupling with proper DC biasing at IN+ is recommended for true single-rail video amplification.
What is the purpose of the NC pins on the THS4081ED DGN package?
Pins 1, 5, and 8 of the THS4081ED DGN package are designated NC (no internal connection). They contain no bond wires or internal circuitry. These pins must remain unconnected - neither tied to ground nor routed - to avoid parasitic coupling or mechanical stress on the leadframe. PCB layout should isolate them from adjacent traces.
How does the PowerPAD™ thermal pad on the THS4081ED improve thermal performance?
The exposed thermal pad on the THS4081ED DGN package provides direct thermal conduction from the die to the PCB. When soldered to a 68 × 70 mil copper area with five 13-mil vias connected to an internal ground plane, it achieves θJA = 58.4°C/W - reducing junction temperature rise by >40% versus standard MSOP-8, enabling 2.14 W continuous dissipation at TA = 25°C.
THS4081ED Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- -
- Number of Circuits:
- -
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
THS4081ED FAQ
1.How can I place an order for THS4081ED through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081ED 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 THS4081ED reliable?
The price and inventory of THS4081ED are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081ED is usually 5 days.
3.What payment methods are accepted for THS4081ED?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081ED transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081ED?
THS4081ED orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081ED 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 THS4081ED?
For technical support, including THS4081ED datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081ED requirements.
6.How does Aetrix verify that THS4081ED is sourced from the original manufacturer or authorized distributors?
All THS4081ED 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 THS4081ED meets industry standards.
7.What is the process for return or replacement of THS4081ED?
All THS4081ED units undergo pre-shipment inspection (PSI). If there is an issue with THS4081ED, 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 THS4081ED part is unused and in its original packaging.
Return procedure for THS4081ED:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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