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Texas Instruments THS4081CDGN
- Part No.:
- THS4081CDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4081CDGN.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,328
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Product details
Overview
THS4081CDGN 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 (−3 dB, G = 1), 230 V/µs slew rate, and 43 ns settling time (0.1%), with ±15 V supply capability and 85 mA output drive - enabling high-fidelity analog front-end amplification in broadcast video routing and high-resolution imaging systems.
For engineers reviewing the THS4081CDGN datasheet, THS4081CDGN pinout, THS4081CDGN application, or THS4081CDGN equivalent, key selection criteria include its PowerPAD™ MSOP-8 thermal performance, low 0.01% differential gain error at NTSC video frequencies, −64 dBc THD at 1 MHz into 150 Ω, and compatibility with ±5 V to ±15 V dual supplies across 0°C to 70°C ambient operation.
Technical Context
The THS4081CDGN 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) when driving >10 pF capacitive loads to maintain phase margin.
It features rail-to-rail input common-mode range (±13.8 V at ±15 V supplies), 90 dB CMRR, and thermally enhanced PowerPAD™ DGN package with 4.7°C/W θJC, supporting high-output-power video line drivers without external heatsinking under typical PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3 dB) | 175 MHz at ±15 V, G = 1 - supports full HD baseband video amplification without gain peaking. |
| Slew Rate | 230 V/µs at ±15 V - enables clean 1080p/60 video pulse reproduction with minimal edge distortion. |
| Settling Time (0.1%) | 43 ns at ±15 V, 5-V step - meets timing budget for multi-channel video ADC/DAC interface buffering. |
| Differential Gain/Phase | 0.01% / 0.05° at NTSC, ±15 V - preserves color fidelity in professional video signal chains. |
| THD | −64 dBc at 1 MHz, 2 VPP, 150 Ω load - ensures low harmonic contamination in RF IF amplifiers and CATV line drivers. |
| Supply Current | 3.4 mA per channel at ±15 V - enables power-constrained portable test equipment and multi-amplifier video modules. |
| Output Drive | 85 mA continuous into 20 Ω - drives 75 Ω coaxial cables directly with series termination for impedance matching. |
Pinout & Package
The THS4081CDGN is housed in an 8-pin PowerPAD™ MSOP (DGN) package with exposed thermal pad on underside, electrically isolated from all terminals. The package supports high-power dissipation (2.14 W at TA = 25°C) via soldered thermal pad connection to internal ground plane using 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 PCB layout symmetry. |
| 2 (IN−) | Inverting input | High-impedance node for feedback network connection; sensitive to stray capacitance - requires shortest possible trace. |
| 3 (IN+) | Non-inverting input | DC-coupled or AC-coupled signal entry point; common-mode range extends to ±13.8 V at ±15 V supplies. |
| 4 (VCC−) | Negative supply rail | Connects to system negative rail; requires local 0.1 µF ceramic + 6.8 µF tantalum decoupling. |
| 5 (NC) | No internal connection | Unused pin; no electrical function - avoid routing signals nearby to prevent coupling. |
| 6 (OUT) | Amplifier output | Capable of ±13.6 V swing into 250 Ω; requires ≥20 Ω series resistor when driving >10 pF loads. |
| 7 (VCC+) | Positive supply rail | Connects to system positive rail; shares decoupling topology with VCC− for balanced PSRR. |
| 8 (NC) | No internal connection | Thermally connected to PowerPAD™; not electrically active - may be soldered to thermal pad for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables battery-powered video monitors and portable signal analyzers with extended runtime. |
| PowerPAD™ thermal enhancement | θJC = 4.7°C/W allows 2.14 W power dissipation without external heatsink - critical for compact video distribution amplifiers. |
| Video-optimized distortion performance | 0.01% differential gain and 0.05° differential phase preserve NTSC/PAL chroma integrity in broadcast-grade equipment. |
| Wide supply range | Operates from ±5 V to ±15 V dual supply or 10 V to 30 V single supply - simplifies integration into legacy and modern mixed-voltage systems. |
| High output current | 85 mA drive capability supports direct 75 Ω cable driving with source termination, eliminating need for external buffer stages. |
Applications
| Broadcast Video Distribution | Medical Imaging Signal Chain |
|---|---|
Use Scenario: Amplifying and distributing composite NTSC video signals across multiple monitor outputs in studio switchers. IC Role / Device Role / Timing Role: High-fidelity unity-gain buffer with minimal group delay variation and ultra-low differential phase error. Use Value: Maintains color accuracy (0.05° differential phase) and luminance flatness (35 MHz 0.1 dB bandwidth) across all outputs without crosstalk-induced hue shifts. | Use Scenario: Driving analog outputs of high-speed medical ultrasound beamformer ASICs to 12-bit ADC inputs. IC Role / Device Role / Timing Role: Low-noise, fast-settling gain stage preceding digitization, preserving transient fidelity of echo return pulses. Use Value: 43 ns settling time (0.1%) and −64 dBc THD ensure accurate capture of microsecond-scale tissue reflections without harmonic aliasing. |
| Test & Measurement Front-End | High-Resolution Industrial Camera Interface |
Use Scenario: Conditioning analog video outputs from oscilloscope mainframe for external display or recording. IC Role / Device Role / Timing Role: Wideband amplifier with precise DC offset control and high PSRR to reject power supply noise in lab environments. Use Value: 90 dB CMRR and 90 dB PSRR suppress common-mode interference from switching power supplies, ensuring clean waveform display. | Use Scenario: Buffering analog pixel data from CMOS image sensors in machine vision cameras operating at 60+ fps. IC Role / Device Role / Timing Role: Low-distortion, high-slew-rate driver for 10–12-bit parallel video bus interfacing to FPGA-based frame grabbers. Use Value: 230 V/µs slew rate prevents edge rounding on fast pixel clock transitions, maintaining timing integrity for accurate pixel sampling. |
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 |
|---|---|---|---|
| THS3091D | Higher 280 MHz bandwidth but 7.5 mA quiescent current; no PowerPAD™ package; SOIC-8 only. | Preferred where raw speed dominates power budget, e.g., radar pulse amplification. | Select THS3091D only if >200 MHz bandwidth is mandatory and thermal constraints allow higher power dissipation. |
| LMH6702MA | 220 MHz bandwidth, 5.5 mA IQ, SOIC-8; lower 0.025% differential gain error but no specified differential phase. | Better suited for precision instrumentation requiring lowest THD (−72 dBc) over video-specific metrics. | Choose LMH6702MA when absolute linearity trumps video-standard compliance and thermal performance is secondary. |
Compared with THS3091D and LMH6702MA, the THS4081CDGN uniquely balances ultralow 3.4 mA quiescent current, PowerPAD™ thermal efficiency, and video-validated differential gain/phase specs - making it optimal for space- and power-constrained broadcast and imaging systems where thermal management and color fidelity are co-critical.
Availability
THS4081CDGN is available at Aetrix Electronics and suitable for broadcast video distribution, medical imaging front-ends, test equipment signal conditioning, and industrial camera interfaces requiring stable component supply across long production lifecycles.
Supply support for THS4081CDGN 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 THS4081CDGN belongs to TI's THS408x family of ultralow-power, high-speed voltage-feedback amplifiers designed specifically for demanding video, communications, and instrumentation applications where bandwidth, distortion, and thermal efficiency must coexist.
FAQ
What is the maximum supply voltage rating for the THS4081CDGN?
The THS4081CDGN has an absolute maximum supply voltage rating of ±16.5 V across VCC+ and VCC− pins. Operation beyond this limit risks permanent damage. Recommended operating range is ±5 V to ±15 V dual supply or 10 V to 30 V single supply, with 3.4 mA typical quiescent current at ±15 V. Always observe derating curves in the datasheet for elevated temperature conditions.
Does the THS4081CDGN require external compensation for stability?
No, the THS4081CDGN is internally compensated for unity-gain stability. However, when driving capacitive loads exceeding 10 pF, a minimum 20 Ω series resistor must be placed between the OUT pin and the load to maintain phase margin and prevent ringing. This is explicitly documented in the "Driving a Capacitive Load" section of the SLOS274D datasheet.
How does the PowerPAD™ thermal pad on the THS4081CDGN improve thermal performance?
The PowerPAD™ thermal pad on the THS4081CDGN provides a direct thermal path from the die to the PCB, achieving θJC = 4.7°C/W. When soldered to a copper area with five 13-mil vias connected to an internal ground plane, it enables 2.14 W power dissipation at TA = 25°C - significantly higher than standard MSOP packages. The pad is electrically isolated, so no circuit connection is needed.
Can the THS4081CDGN be used in single-supply configurations?
Yes, the THS4081CDGN 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 1.1 V of the positive rail (at ±5 V supplies), allowing rail-to-rail input operation in properly biased configurations. Output swing is typically ±3.8 V into 1 kΩ with ±5 V supplies, making it viable for 5 V or 12 V systems with appropriate level-shifting.
What is the differential phase error specification for the THS4081CDGN at NTSC video signals?
The THS4081CDGN exhibits 0.05° differential phase error at NTSC video frequencies when operated at ±15 V supply with gain = 2. This value is measured under standardized 40 IRE modulation conditions and remains consistent at ±5 V supply, confirming its suitability for broadcast-quality video amplification where chrominance timing integrity is critical to color reproduction.
THS4081CDGN 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
THS4081CDGN FAQ
1.How can I place an order for THS4081CDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081CDGN 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 THS4081CDGN reliable?
The price and inventory of THS4081CDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081CDGN is usually 5 days.
3.What payment methods are accepted for THS4081CDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081CDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081CDGN?
THS4081CDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081CDGN 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 THS4081CDGN?
For technical support, including THS4081CDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081CDGN requirements.
6.How does Aetrix verify that THS4081CDGN is sourced from the original manufacturer or authorized distributors?
All THS4081CDGN 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 THS4081CDGN meets industry standards.
7.What is the process for return or replacement of THS4081CDGN?
All THS4081CDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS4081CDGN, 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 THS4081CDGN part is unused and in its original packaging.
Return procedure for THS4081CDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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