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Texas Instruments THS4081ID
- Part No.:
- THS4081ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4081ID.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,512
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Product details
Overview
THS4081ID from Texas Instruments is a single-channel, ultralow-power, high-speed voltage-feedback operational amplifier designed for precision 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%) while consuming only 3.4 mA per channel at ±15 V supply - enabling high-fidelity analog front-ends in portable or thermally constrained systems.
For engineers reviewing the THS4081ID datasheet, THS4081ID pinout, THS4081ID application, or THS4081ID equivalent, key selection considerations include its −40°C to +85°C industrial temperature range, PowerPAD™ MSOP (DGN) package thermal performance, low 0.01% differential gain error for NTSC video, and compatibility with ±5 V to ±15 V dual supplies or 10 V to 30 V single supplies.
Technical Context
The THS4081ID employs a dielectrically isolated complementary bipolar process with GHz fT transistors, enabling voltage-feedback architecture optimized for wide bandwidth and fast transient response. Its internal compensation targets maximum small-signal bandwidth and slew rate, requiring external series output resistance (>20 Ω) when driving capacitive loads >10 pF to maintain phase margin.
It features rail-to-rail input common-mode range (±13.8 V at ±15 V supply), 85 mA output drive capability into 20 Ω, and integrated ESD protection circuitry. Noise performance is characterized by 10 nV/√Hz input voltage noise and 0.7 pA/√Hz input current noise at 10 kHz, supporting low-noise signal amplification in sensitive analog chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 175 MHz at ±15 V, G = 1 - supports baseband video and broadband IF signal amplification without roll-off |
| Slew Rate | 230 V/µs at ±15 V - enables faithful reproduction of fast-edged signals up to ~35 MHz full-power bandwidth |
| Settling Time (0.1%) | 43 ns at ±15 V, 5-V step - meets timing-critical sampling and multiplexing requirements in data acquisition |
| Total Harmonic Distortion | −64 dBc at 1 MHz, 2 VPP, RL = 150 Ω - preserves signal fidelity in composite video and high-resolution imaging paths |
| Differential Gain/Phase | 0.01% / 0.05° at NTSC, ±15 V - satisfies broadcast-grade video linearity standards |
| Supply Current | 3.4 mA per channel at ±15 V - reduces system power budget and thermal load in multi-amplifier designs |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including factory automation and outdoor equipment |
Pinout & Package
The THS4081ID is available in the thermally enhanced MSOP PowerPAD™ (DGN) package, featuring an exposed thermal pad on the underside for direct PCB copper connection and improved junction-to-board thermal resistance (θJC = 4.7°C/W).
| 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 - no electrical function |
| 2 (IN−) | Inverting input | Differential input node; requires matched trace length and impedance control to minimize imbalance-induced distortion |
| 3 (IN+) | Noninverting input | Differential input node; high-impedance path with 1.5 pF input capacitance - sensitive to stray coupling |
| 4 (VCC−) | Negative supply rail | Connects to system negative supply; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling |
| 5 (NC) | No internal connection | Unused pin; electrically isolated - no routing or connection required |
| 6 (OUT) | Amplifier output | Capable of ±13.6 V swing into 250 Ω; series 20–75 Ω resistor recommended for >10 pF capacitive loads |
| 7 (VCC+) | Positive supply rail | Connects to system positive supply; decoupling identical to VCC−; shared ground plane improves PSRR |
| 8 (NC) | No internal connection | Unused pin; thermally connected to package frame but not electrically active |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables battery-powered or energy-sensitive video front-ends without sacrificing speed |
| High output drive | 85 mA typical into 20 Ω supports direct driving of 75 Ω transmission lines or multiple downstream loads |
| Video-optimized linearity | 0.01% differential gain and 0.05° differential phase meet SMPTE/ITU-R BT.601 broadcast video specifications |
| Wide supply range | Operates from ±5 V to ±15 V dual or 10 V to 30 V single supply - simplifies integration across legacy and modern power architectures |
| PowerPAD™ thermal enhancement | DGN package achieves 2.14 W power rating at TA = 25°C via low-θJC thermal path - critical for sustained high-output operation |
Applications
| Professional Video Signal Distribution | Industrial Camera Interface Circuitry |
|---|---|
Use Scenario: Amplifying and buffering composite NTSC/PAL video signals in broadcast switchers and distribution amplifiers. IC Role / Device Role / Timing Role: High-fidelity unity-gain buffer with minimal group delay variation and sub-0.02% gain flatness across 35 MHz. Use Value: Preserves luminance/chrominance separation integrity and prevents color bleeding during long-cable transmission. | Use Scenario: Driving analog outputs from CMOS image sensors in machine vision cameras operating in factory-floor environments. IC Role / Device Role / Timing Role: Low-noise, fast-settling driver stage preceding ADC sampling - maintains pixel timing accuracy under thermal stress. Use Value: Enables 10-bit+ dynamic range capture at >60 fps with <0.05° phase shift across field rates. |
| High-Speed Data Acquisition Front-End | Communications Baseband Conditioning |
Use Scenario: Signal conditioning ahead of high-speed SAR or pipeline ADCs in automated test equipment. IC Role / Device Role / Timing Role: Precision gain stage with 43 ns 0.1% settling - synchronizes with 20+ MSPS sampling clocks. Use Value: Eliminates aperture uncertainty errors and supports accurate multi-channel phase-coherent sampling. | Use Scenario: Amplifying I/Q baseband signals in software-defined radio (SDR) transceivers before DAC or after ADC. IC Role / Device Role / Timing Role: Low-distortion, wide-bandwidth gain block with −64 dBc THD at 1 MHz - preserves modulation accuracy. Use Value: Maintains EVM <1.5% for 64-QAM waveforms in 20 MHz LTE channels. |
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 | 100 MHz bandwidth, 100 V/µs slew rate, 2.9 mA supply current - lower speed, lower power | Better suited for general-purpose high-speed amplification where 175 MHz is unnecessary | Select THS4031CD when bandwidth ≤100 MHz suffices and quiescent current reduction is prioritized over settling speed |
| THS4051CD | 70 MHz bandwidth, 145 V/µs slew rate, 4.5 mA supply current - moderate speed, higher current | Optimized for cost-sensitive instrumentation with relaxed video linearity requirements | Choose THS4051CD for non-broadcast video or sensor interfaces where differential gain <0.05% is acceptable |
Compared with THS4081ID, THS4031CD trades 75 MHz bandwidth and 130 V/µs slew rate for 0.5 mA lower supply current, while THS4051CD offers lower THD at mid-band but fails to meet NTSC differential phase specs - making THS4081ID uniquely suitable for broadcast-grade video signal chains.
Availability
THS4081ID is available at Aetrix Electronics and suitable for professional video infrastructure, industrial imaging systems, and high-speed data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4081ID 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 decades of expertise in high-performance op-amps and signal chain solutions.
The THS4081ID belongs to TI's THS408x family of ultralow-power, high-speed voltage-feedback amplifiers engineered specifically for broadcast video, medical imaging, and communications baseband applications demanding simultaneous bandwidth, linearity, and thermal efficiency.
FAQ
What is the operating temperature range of the THS4081ID?
The THS4081ID is rated for industrial operation from −40°C to +85°C, as indicated by the "I" suffix in its part number. This range is validated per TI's recommended operating conditions and absolute maximum ratings, ensuring reliable performance in factory automation, outdoor surveillance, and transportation electronics where ambient temperatures fluctuate widely. The THS4081ID maintains specified bandwidth, distortion, and settling time across this full range.
Does the THS4081ID support single-supply operation?
Yes, the THS4081ID supports single-supply operation from 10 V to 30 V, as specified in the recommended operating conditions. When used in single-supply mode, the input common-mode range extends from 0 V to VCC − 1.2 V (e.g., 0 V to 28.8 V at 30 V supply), and output swing reaches within 1.2 V of each rail. Designers must bias the IN+ pin appropriately (e.g., at VCC/2) and ensure proper decoupling to maintain PSRR and stability.
What package options are available for the THS4081ID?
The THS4081ID is offered exclusively in the thermally enhanced MSOP PowerPAD™ (DGN) package - an 8-pin, 3 mm × 3 mm surface-mount variant with an exposed thermal pad on the underside. Unlike the SOIC (D) option used for the C-suffix version, the DGN package provides significantly lower junction-to-board thermal resistance (θJC = 4.7°C/W), enabling higher continuous output power in compact layouts. No SOIC variant exists for the "I" temperature grade.
How does the THS4081ID handle capacitive loads?
The THS4081ID is internally compensated for optimal bandwidth and slew rate, making it susceptible to instability when driving capacitive loads >10 pF directly. To maintain phase margin and prevent ringing, TI recommends placing a series resistor (≥20 Ω) between the OUT pin and the capacitive load. For 75 Ω video lines, a 75 Ω series resistor simultaneously isolates capacitance and matches source impedance - a configuration verified in TI's application notes and evaluation board layouts for THS4081ID.
Is there an evaluation module available for the THS4081ID?
No - the THS4081EVM is designed for the commercial-grade THS4081CD (0°C to 70°C), not the industrial THS4081ID. While the core amplifier functionality is identical, the EVM's thermal design and component tolerances are optimized for the C-suffix operating range. For industrial validation, TI recommends using the THS4081EVM as a reference layout and adapting the PCB thermal relief, decoupling, and power delivery to meet −40°C to +85°C requirements - or contacting TI for custom evaluation support.
THS4081ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4081ID FAQ
1.How can I place an order for THS4081ID through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081ID 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 THS4081ID reliable?
The price and inventory of THS4081ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081ID is usually 5 days.
3.What payment methods are accepted for THS4081ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081ID?
THS4081ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081ID 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 THS4081ID?
For technical support, including THS4081ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081ID requirements.
6.How does Aetrix verify that THS4081ID is sourced from the original manufacturer or authorized distributors?
All THS4081ID 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 THS4081ID meets industry standards.
7.What is the process for return or replacement of THS4081ID?
All THS4081ID units undergo pre-shipment inspection (PSI). If there is an issue with THS4081ID, 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 THS4081ID part is unused and in its original packaging.
Return procedure for THS4081ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4081ID Tags
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