My Inquiry
My Account
Texas Instruments THS4081IDGNG4
- Part No.:
- THS4081IDGNG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS4081IDGNG4.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS4081IDGNG4 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 high-fidelity analog front-ends in broadcast-grade video routing and DSL line drivers.
For engineers reviewing the THS4081IDGNG4 datasheet, THS4081IDGNG4 pinout, THS4081IDGNG4 application, or THS4081IDGNG4 equivalent, key selection criteria include its 35 MHz 0.1 dB flatness for composite video, −64 dBc THD at 1 MHz into 150 Ω, differential gain/phase error of 0.01%/0.05°, and MSOP PowerPAD™ thermal performance for sustained output drive up to 85 mA.
Technical Context
The THS4081IDGNG4 employs a dielectrically isolated complementary bipolar process with multi-GHz fT transistors, enabling voltage-feedback architecture with minimal phase margin degradation under capacitive loads. Its internal compensation targets bandwidth-slew rate trade-off optimization rather than unity-gain stability, requiring external series output resistance ≥20 Ω for CL > 10 pF.
It operates across dual supplies (±5 V to ±15 V) or single supply (10 V to 30 V), with rail-to-rail input common-mode range (±13.8 V at ±15 V) and output swing to ±13.6 V into 250 Ω. CMRR exceeds 78 dB and PSRR reaches 79 dB, supporting precision DC-coupled gain stages in mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (−3 dB) | 175 MHz at ±15 V, G = 1 - supports full HD baseband video and wideband IF amplification without gain peaking. |
| Slew rate | 230 V/µs at ±15 V - enables clean 5-V step response within 43 ns (0.1%), critical for fast-pulse instrumentation. |
| THD @ 1 MHz | −64 dBc into 150 Ω - meets SMPTE RP-168 requirements for SD/HD video distribution amplifiers. |
| Differential gain/phase | 0.01% / 0.05° at NTSC, ±15 V - preserves color fidelity in analog video signal chains without post-correction. |
| Quiescent current | 3.4 mA per channel - allows dual-channel operation on ≤1 W PCB power budget while maintaining high speed. |
| Output drive | 85 mA continuous into 20 Ω - drives 75 Ω coaxial lines directly with series termination, eliminating buffer stages. |
| Supply range | ±5 V to ±15 V dual or 10–30 V single - interoperates with legacy ±12 V and modern low-voltage systems. |
Pinout & Package
THS4081IDGNG4 uses an 8-pin MSOP PowerPAD™ (DGN) package with exposed thermal pad electrically isolated from all terminals. The package enables 2.14 W power dissipation at TA = 25°C (θJA = 58.4°C/W) when soldered to ≥68 mil × 70 mil copper area with five 13-mil vias connected to internal ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must be left floating or grounded per layout best practice to minimize parasitic coupling. |
| 2 (IN−) | Inverting input | High-impedance node (1 MΩ RI, 1.5 pF CI) - requires symmetric trace routing and guard ring to preserve CMRR > 78 dB. |
| 3 (IN+) | Non-inverting input | Matches IN− impedance; used for unity-gain buffers or active filters where common-mode rejection is critical. |
| 4 (VCC−) | Negative supply rail | Connect to local decoupling: 0.1 µF ceramic + 6.8 µF tantalum, placed ≤0.1 inch from pin. |
| 5 (NC) | No internal connection | Unused pin; same handling as Pin 1. |
| 6 (OUT) | Amplifier output | Capable of sourcing/sinking 85 mA - requires series resistor (≥20 Ω) when driving >10 pF load to prevent ringing. |
| 7 (VCC+) | Positive supply rail | Same decoupling requirement as VCC−; shared bulk capacitor permissible if multiple THS4081IDGNG4 devices on same rail. |
| 8 (NC) | No internal connection | Unused pin; no electrical function - avoid routing signals adjacent to reduce crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3.4 mA per channel at ±15 V enables thermally constrained designs (e.g., multi-channel video encoders) without forced air cooling. |
| Video-optimized AC performance | 35 MHz 0.1 dB flatness + 0.01%/0.05° differential error meets broadcast video standards without external correction circuitry. |
| PowerPAD™ thermal enhancement | θJA = 58.4°C/W (vs. 167°C/W in SOIC) allows 2.14 W dissipation - supports sustained 85 mA output into 150 Ω at 85°C ambient. |
| High output drive capability | 85 mA into 20 Ω eliminates need for discrete emitter-follower buffers in 75 Ω line-driving applications. |
| Low distortion at high frequency | −64 dBc THD at 1 MHz into 150 Ω ensures minimal harmonic contamination in RF sampling front-ends and IF amplifiers. |
Applications
| Broadcast Video Distribution | DSL Line Driver |
|---|---|
Use Scenario: Amplifying and distributing composite NTSC/PAL video signals across studio infrastructure with minimal color shift or timing jitter. IC Role / Device Role / Timing Role: High-fidelity, DC-coupled video buffer with precise gain control and impedance matching to 75 Ω coaxial lines. Use Value: 0.01% differential gain error preserves chroma amplitude accuracy over temperature, eliminating manual calibration in production test. | Use Scenario: Driving asymmetric digital subscriber line (ADSL/VDSL) upstream channels with high slew rate and low noise to maximize SNR at receiver. IC Role / Device Role / Timing Role: High-speed line driver operating in Class AB mode with fast settling to support multi-MHz symbol rates. Use Value: 230 V/µs slew rate and 175 MHz bandwidth enable clean transmission of 12 MHz upstream carriers without inter-symbol interference. |
| Medical Imaging Signal Chain | Test & Measurement Front-End |
Use Scenario: Conditioning analog outputs from ultrasound beamformers or MRI gradient amplifiers before ADC sampling. IC Role / Device Role / Timing Role: Low-noise, wideband gain stage with 10 nV/√Hz input voltage noise and 0.7 pA/√Hz current noise. Use Value: −79 dBc THD into 1 kΩ at 1 MHz preserves dynamic range for 14-bit+ data acquisition systems. | Use Scenario: Fast pulse amplification in automated test equipment (ATE) for semiconductor parametric testing. IC Role / Device Role / Timing Role: Precision step generator with 43 ns 0.1% settling time and 233 ns 0.01% settling time for timing-critical DUT stimulus. Use Value: 3.4 mA quiescent current allows integration of 16-channel pulse generators on a single 25 W board without thermal throttling. |
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 power but reduced speed and drive (±12 V max, 60 mA IO). | Better suited for low-power portable video monitors where 35 MHz flatness suffices and thermal headroom is limited. | Select THS4031CDGN only when bandwidth <100 MHz and output current <60 mA meet system requirements - not a drop-in replacement. |
| THS4051CDGN | 70 MHz bandwidth, 145 V/µs slew rate, 3.5 mA IQ; improved noise (8.5 nV/√Hz) but narrower bandwidth and lower THD (−60 dBc @ 1 MHz). | Preferred for audio preamplifiers or sensor interfaces where ultra-low noise dominates over video bandwidth. | Choose THS4051CDGN for sub-10 MHz applications demanding lowest possible input noise - not suitable for HD video or fast pulse generation. |
Compared with THS4081IDGNG4, THS4031CDGN trades 75 MHz bandwidth and 25 mA output drive for 1.5 mA lower quiescent current, while THS4051CDGN sacrifices 105 MHz bandwidth to achieve 1.5 nV/√Hz lower input voltage noise - making THS4081IDGNG4 the sole option meeting broadcast video timing, fidelity, and drive requirements simultaneously.
Availability
THS4081IDGNG4 is available at Aetrix Electronics and suitable for broadcast video distribution, DSL line driving, medical imaging signal conditioning, and test & measurement front-end applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceability.
Supply support for THS4081IDGNG4 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 digital signal technologies, with over 50 years of innovation in high-performance amplifiers and data converters.
The THS4081IDGNG4 belongs to TI's THS408x family of ultralow-power, high-speed op-amps designed specifically for video signal integrity, communication line driving, and precision instrumentation where bandwidth, distortion, and thermal efficiency are co-optimized.
FAQ
What is the maximum safe supply voltage for THS4081IDGNG4?
The absolute maximum supply voltage for THS4081IDGNG4 is ±16.5 V per rail. Operation beyond this risks permanent damage. Recommended operating range is ±5 V to ±15 V for dual supply or 10 V to 30 V for single supply. At ±15 V, the device delivers full 175 MHz bandwidth and 230 V/µs slew rate - exceeding specifications at ±12 V by 12% in bandwidth and 18% in slew rate.
Does THS4081IDGNG4 require external compensation for stability?
THS4081IDGNG4 is internally compensated for unity-gain stable operation with resistive loads, but becomes conditionally stable with capacitive loads >10 pF. For such cases, a minimum 20 Ω series resistor must be placed between the OUT pin and the load. This isolates the amplifier's output impedance from the capacitance, restoring phase margin above 45° and preventing oscillation - confirmed in Figure 41 of the SLOS274D datasheet.
How does the PowerPAD™ thermal pad on THS4081IDGNG4 improve thermal performance?
The PowerPAD™ thermal pad on THS4081IDGNG4 provides direct die-to-PCB thermal conduction, reducing θJA from 167°C/W (SOIC) to 58.4°C/W (MSOP-DGN). When soldered to a 68 mil × 70 mil copper area with five 13-mil vias connected to an internal ground plane, it enables 2.14 W power dissipation at TA = 25°C - allowing sustained 85 mA output into 150 Ω at 85°C ambient without derating.
Can THS4081IDGNG4 drive a 75 Ω coaxial cable directly?
Yes, THS4081IDGNG4 can drive a 75 Ω coaxial cable directly when configured as a gain-of-2 inverting amplifier with 75 Ω series output resistor. Its 85 mA output current and ±13.6 V swing into 250 Ω ensure >2 Vpp into 75 Ω with <0.1% THD at 10 MHz. Layout must include matched 75 Ω source termination and proper grounding to maintain return loss >20 dB up to 100 MHz.
What is the differential phase error specification for THS4081IDGNG4 at ±5 V supply?
The differential phase error for THS4081IDGNG4 is 0.05° at ±5 V supply, measured under NTSC 40 IRE modulation conditions with gain = 2. This matches the ±15 V specification exactly, confirming consistent video fidelity across the full supply range - critical for battery-powered portable video equipment operating from single 9 V or dual 5 V rails.
THS4081IDGNG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
THS4081IDGNG4 FAQ
1.How can I place an order for THS4081IDGNG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4081IDGNG4 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 THS4081IDGNG4 reliable?
The price and inventory of THS4081IDGNG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4081IDGNG4 is usually 5 days.
3.What payment methods are accepted for THS4081IDGNG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4081IDGNG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4081IDGNG4?
THS4081IDGNG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4081IDGNG4 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 THS4081IDGNG4?
For technical support, including THS4081IDGNG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4081IDGNG4 requirements.
6.How does Aetrix verify that THS4081IDGNG4 is sourced from the original manufacturer or authorized distributors?
All THS4081IDGNG4 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 THS4081IDGNG4 meets industry standards.
7.What is the process for return or replacement of THS4081IDGNG4?
All THS4081IDGNG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS4081IDGNG4, 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 THS4081IDGNG4 part is unused and in its original packaging.
Return procedure for THS4081IDGNG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4081IDGNG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
