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Texas Instruments THS4081IDGN
- Part No.:
- THS4081IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4081IDGN.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,977
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Product details
Overview
THS4081IDGN 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 designs.
For engineers reviewing the THS4081IDGN datasheet, THS4081IDGN pinout, THS4081IDGN application, or THS4081IDGN equivalent, key selection criteria include its 35 MHz 0.1 dB flatness bandwidth for composite video, 0.01% differential gain / 0.05° differential phase accuracy, −64 dBc THD at 1 MHz (RL = 150 Ω), and MSOP-8 PowerPAD™ thermal performance in industrial temperature range (−40°C to +85°C).
Technical Context
The THS4081IDGN 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 is electrically isolated and requires PCB-level thermal vias for junction-to-board thermal resistance of 4.7°C/W.
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 gain peaking. |
| Slew Rate | 230 V/µs at ±15 V - enables clean 20-V step response with minimal overshoot in high-dV/dt applications. |
| Settling Time (0.1%) | 43 ns at ±15 V, 5-V step - meets timing-critical sampling and reconstruction requirements in ADC/DAC buffers. |
| Differential Gain/Phase | 0.01% / 0.05° at NTSC, ±15 V - preserves color fidelity in broadcast-quality analog video transmission. |
| THD | −64 dBc at f = 1 MHz, RL = 150 Ω - ensures low harmonic contamination in RF and instrumentation signal chains. |
| Quiescent Current | 3.4 mA per channel at ±15 V - enables multi-channel video systems with constrained power budgets. |
| Supply Range | ±5 V to ±15 V dual or 10 V to 30 V single - supports legacy ±12 V systems and modern low-voltage industrial rails. |
Pinout & Package
The THS4081IDGN is housed in an 8-pin MSOP PowerPAD™ (DGN) package with an electrically isolated thermal pad on the underside. This thermally enhanced package achieves θJA = 58.4°C/W and θJC = 4.7°C/W when soldered to a 2 oz. copper pad with five 13-mil vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must be left floating or tied to ground only if required by layout symmetry - no electrical function. |
| 2 (IN−) | Inverting input | High-impedance node for feedback network connection; layout must minimize trace length to reduce parasitic capacitance. |
| 3 (IN+) | Non-inverting input | High-impedance node for signal source; requires matched trace impedance and guard ring for noise-sensitive applications. |
| 4 (VCC−) | Negative supply rail | Return path for bias current and output sink; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling. |
| 5 (NC) | No internal connection | Unused pin; no internal bond wire - avoid routing signals or power near this pin. |
| 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 stability. |
| 7 (VCC+) | Positive supply rail | Power input for active circuitry; decoupling identical to VCC−; shared supply traces must avoid ground loops. |
| 8 (NC) | No internal connection | Unused pin; electrically isolated - may be used as mechanical anchor but not for thermal conduction unless soldered to pad. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables 4-channel video systems drawing <14 mA total supply current. |
| High output drive | 85 mA typical into 20 Ω allows direct driving of 75 Ω coaxial cables with series termination for impedance matching. |
| Video-optimized AC performance | 35 MHz 0.1 dB flatness and 0.01%/0.05° differential error meet SMPTE 253M broadcast video specifications. |
| Thermally enhanced PowerPAD™ | Exposed thermal pad reduces junction-to-board θJC to 4.7°C/W - critical for sustained 2.14 W power dissipation at TA = 25°C. |
| Wide supply flexibility | Operates from ±5 V to ±15 V dual or 10–30 V single supply - simplifies integration into mixed-voltage industrial and test equipment. |
Applications
| HD Composite Video Driver | High-Speed Data Acquisition Buffer |
|---|---|
Use Scenario: Driving 75 Ω coaxial cable in broadcast-grade SD/HD video equipment with minimal color distortion. IC Role / Device Role / Timing Role: Final-stage video line driver with unity-gain stable configuration and DC-coupled output. Use Value: 0.01% differential gain error preserves chrominance amplitude integrity across NTSC/PAL signals. | Use Scenario: Buffering high-resolution ADC inputs in automated test equipment requiring fast settling and low noise. IC Role / Device Role / Timing Role: Track-and-hold amplifier interface with 43 ns 0.1% settling to support ≥10 MSPS sampling rates. Use Value: 230 V/µs slew rate prevents slewing-induced distortion during full-scale transitions. |
| Low-Power Instrumentation Amplifier Stage | IF Signal Amplifier in Communications Receivers |
Use Scenario: First gain stage in portable battery-powered oscilloscopes or spectrum analyzers. IC Role / Device Role / Timing Role: Low-noise, low-power preamplifier with 10 nV/√Hz input voltage noise and 3.4 mA supply current. Use Value: Enables >8-hour battery life in handheld instruments without sacrificing 175 MHz bandwidth. | Use Scenario: Intermediate-frequency amplification in SDR transceivers operating at 10–100 MHz. IC Role / Device Role / Timing Role: Fixed-gain IF buffer with 175 MHz −3 dB bandwidth and −64 dBc THD at 1 MHz. Use Value: Maintains signal purity across wide dynamic range while rejecting adjacent-channel interference. |
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 |
|---|---|---|---|
| THS4031CDGN | 100 MHz bandwidth, 100 V/µs slew rate, 2.5 mA IQ - lower speed and power than THS4081IDGN. | Better suited for cost-sensitive, medium-bandwidth video or sensor interfaces where 175 MHz is unnecessary. | Select THS4031CDGN when system bandwidth ≤100 MHz and thermal budget is tighter due to lower power dissipation. |
| OPA695IDGN | 1.7 GHz bandwidth, 4300 V/µs slew rate, 12.5 mA IQ - significantly higher speed and current draw. | Targeted at RF/IF gain blocks and optical receiver TIAs where THS4081IDGN lacks sufficient bandwidth. | Choose OPA695IDGN only when signal chain requires >500 MHz small-signal bandwidth or sub-10 ns settling. |
Compared with THS4031CDGN, THS4081IDGN provides +75 MHz bandwidth and +130 V/µs slew rate at modest IQ increase; versus OPA695IDGN, it trades 10× bandwidth for ¼ quiescent current and proven video linearity - making THS4081IDGN optimal for industrial video and precision analog acquisition where speed and power coexist.
Availability
THS4081IDGN is available at Aetrix Electronics and suitable for HD video driver, high-speed data acquisition, and low-power instrumentation applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS4081IDGN 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The THS4081IDGN belongs to TI's high-speed operational amplifier product line, engineered specifically for video signal integrity, low-distortion analog front-ends, and power-constrained broadband applications demanding both speed and precision.
FAQ
What is the operating temperature range for the THS4081IDGN?
The THS4081IDGN is rated for industrial temperature operation from −40°C to +85°C, as indicated by the "I" suffix in the part number. This range is validated across all electrical specifications including bandwidth, slew rate, and THD performance - making it suitable for deployment in factory automation, outdoor video surveillance, and ruggedized test equipment without derating.
Does the THS4081IDGN require external compensation for stability?
The THS4081IDGN is internally compensated for unity-gain stability, but capacitive loads >10 pF at the output require a minimum 20 Ω series resistor to maintain phase margin and prevent ringing. This is not compensation per se but a layout-driven isolation technique - confirmed in the datasheet's "Driving a Capacitive Load" section and validated in Figure 41.
Can the THS4081IDGN be used in single-supply configurations?
Yes, the THS4081IDGN supports single-supply operation from 10 V to 30 V. Its input common-mode range extends to within 1.2 V of the negative rail and 1.4 V of the positive rail (at ±15 V), enabling rail-splitter or virtual-ground designs. Output swing is specified down to 3.4 V from each rail under 150 Ω load, supporting true DC-coupled single-supply video paths.
How does the PowerPAD™ thermal pad on the THS4081IDGN improve thermal performance?
The exposed thermal pad on the THS4081IDGN's DGN package reduces junction-to-board thermal resistance to 4.7°C/W when soldered to a 2 oz. copper area with five 13-mil vias. This enables 2.14 W power dissipation at TA = 25°C - over 2.8× higher than the SOIC-8 version - critical for sustained high-output-current operation in compact enclosures.
What are the recommended PCB layout practices for the THS4081IDGN?
TI recommends: (1) a solid ground plane beneath the device (with local removal only under IN+/IN−/OUT traces), (2) 0.1 µF ceramic + 6.8 µF tantalum decoupling on each supply pin placed <0.1 inch from the pin, (3) surface-mount passives with shortest possible traces, and (4) no sockets - direct soldering only. These practices are essential to achieve specified 175 MHz bandwidth and −64 dBc THD performance.
THS4081IDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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:
- 85 mA
- 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-HVSSOP
THS4081IDGN FAQ
1.How can I place an order for THS4081IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081IDGN 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 THS4081IDGN reliable?
The price and inventory of THS4081IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081IDGN is usually 5 days.
3.What payment methods are accepted for THS4081IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081IDGN?
THS4081IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081IDGN 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 THS4081IDGN?
For technical support, including THS4081IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081IDGN requirements.
6.How does Aetrix verify that THS4081IDGN is sourced from the original manufacturer or authorized distributors?
All THS4081IDGN 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 THS4081IDGN meets industry standards.
7.What is the process for return or replacement of THS4081IDGN?
All THS4081IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4081IDGN, 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 THS4081IDGN part is unused and in its original packaging.
Return procedure for THS4081IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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