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Texas Instruments THS3111IDG4
- Part No.:
- THS3111IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS3111IDG4.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,740
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Product details
Overview
THS3111IDG4 from Texas Instruments is a high-voltage, current-feedback operational amplifier optimized for video distribution and high-fidelity analog signal amplification. It delivers 90 MHz small-signal bandwidth (G = 2, RL = 100 Ω), 1300 V/μs slew rate, ±15 V supply operation, 260 mA output drive, and <0.013% differential gain error (PAL) into 150 Ω loads - enabling multi-load broadcast-grade video buffering.
For engineers reviewing the THS3111IDG4 datasheet, THS3111IDG4 pinout, THS3111IDG4 application, or THS3111IDG4 equivalent, this page provides verified electrical specifications, SOIC-8 package layout, video-system design context, real-world load-driving capability data, and validated alternative options for industrial video infrastructure and high-speed analog signal path design.
Technical Context
The THS3111IDG4 uses a current-feedback architecture with low-impedance, high-gain transimpedance stage, enabling wide bandwidth independent of closed-loop gain. Its 3-nV/√Hz voltage noise and 2-pA/√Hz noninverting current noise support high-SNR analog signal conditioning in demanding video and instrumentation applications.
It features rail-to-rail output swing capability (±13.4 V into 100 Ω at ±15 V supplies), robust capacitive load driving (up to 100 pF with RISO compensation), and stable performance across –40°C to +85°C industrial temperature range - confirmed by differential gain/phase plots versus number of 150 Ω video loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 90 MHz at G = 2, RL = 100 Ω - supports full HD baseband video bandwidth without attenuation |
| Slew rate | 1300 V/μs into 100 Ω - enables clean 8-VPP output steps at >10 MHz without slewing distortion |
| Output current | ±260 mA - drives up to eight 75 Ω video lines simultaneously via 150 Ω termination |
| Differential gain | 0.013% (PAL), 0.011% (NTSC) - meets broadcast video fidelity requirements per SMPTE RP-168 |
| Supply range | ±5 V to ±15 V - compatible with legacy analog video equipment power rails |
| Input noise | 3 nV/√Hz voltage noise + 2 pA/√Hz noninverting current noise - preserves SNR in high-Z sensor interfaces |
| Operating temp | –40°C to +85°C - qualified for industrial video encoders, broadcast routers, and medical imaging systems |
Pinout & Package
THS3111IDG4 is housed in an 8-pin SOIC (D) package with PowerPAD™ thermal enhancement. The exposed thermal pad must be soldered to a PCB copper plane for reliable operation at full output current.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - leave unconnected or ground for mechanical stability |
| 2 | VIN− | Inverting input - connects to feedback network; high-impedance node requiring controlled trace routing |
| 3 | VIN+ | Noninverting input - low-bias-current (1 μA max) node suitable for high-Z video source coupling |
| 4 | VS− | Negative supply rail - requires low-ESR bypass capacitor (≥1 μF ceramic) within 1 cm |
| 5 | NC | No internal connection - electrically isolated; may be grounded for EMI reduction |
| 6 | VS+ | Positive supply rail - requires low-ESR bypass capacitor (≥1 μF ceramic) within 1 cm |
| 7 | VOUT | Amplifier output - capable of sourcing/sinking 260 mA; direct drive of 75 Ω coaxial line with series termination |
| 8 | NC | No internal connection - no internal function; recommended to ground for thermal and EMI control |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback topology | Bandwidth remains stable across gain settings - simplifies design of variable-gain video amplifiers |
| Low differential phase error | 0.033° (PAL) ensures accurate color timing in composite video signals without hue shift |
| High output current drive | 260 mA enables single-amplifier distribution to ≥8 standard-definition video loads (150 Ω each) |
| Wide supply range | Operates from ±5 V to ±15 V - interoperable with legacy video gear and modern ±12 V industrial supplies |
| PowerPAD™ thermal package | θJA = 95°C/W enables continuous 260 mA output into 100 Ω without external heatsink |
Applications
| Video Distribution Amplifier | Professional Broadcast Router |
|---|---|
Use Scenario: Distributing one SD/HD video source to multiple monitors or recording devices in broadcast trucks or OB vans. IC Role / Device Role / Timing Role: High-fidelity unity- or gain-of-2 buffer with minimal group delay variation across frequency. Use Value: Maintains <0.015% differential gain and <0.033° differential phase across 8 simultaneous 150 Ω loads - preserving NTSC/PAL color fidelity. |
Use Scenario: Signal routing matrix in live production switchers where analog component video paths require re-amplification. IC Role / Device Role / Timing Role: Re-driver stage between crosspoint switches and output drivers to restore signal integrity. Use Value: 1300 V/μs slew rate and 90 MHz bandwidth ensure sub-1-ns edge fidelity on RGBHV or YPbPr signals. |
| Medical Imaging Interface | Test & Measurement Front-End |
Use Scenario: Amplifying analog outputs from ultrasound or MRI front-end ADCs before digitization or display. IC Role / Device Role / Timing Role: Low-noise, high-output-current driver for 12-bit+ video DACs feeding CRT/LCD displays. Use Value: 3-nV/√Hz input voltage noise and ±13.4 V output swing preserve dynamic range and contrast ratio in diagnostic imaging. |
Use Scenario: Output stage of arbitrary waveform generators or precision pulse sources requiring fast, high-voltage transitions. IC Role / Device Role / Timing Role: Final gain stage delivering calibrated ±10 V pulses with nanosecond rise/fall times. Use Value: 8 ns rise/fall time (G = –5) and 260 mA drive enable 50 Ω cable driving without external MOSFET buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3201D | Higher 1.8-GHz gain-bandwidth product but lower 110 mA output drive; no PowerPAD™ package | Better for RF IF amplification; insufficient for multi-load video distribution | Select THS3111IDG4 when >200 mA output current and video-grade differential gain/phase are required |
| LMH6702MA | Wider 1.8-GHz bandwidth but higher 6.5-mA quiescent current; only available in SOIC-8 without thermal pad | Preferred for DC-coupled wideband instrumentation; less thermally robust at full load | Choose THS3111IDG4 for industrial video systems needing guaranteed 260 mA drive over –40°C to +85°C with thermal margin |
Compared with THS3201D and LMH6702MA, THS3111IDG4 uniquely balances broadcast-grade video linearity (≤0.013% DG), high output current (260 mA), and thermally enhanced SOIC packaging - making it the only option qualified for sustained multi-load video distribution in uncooled enclosures.
Availability
THS3111IDG4 is available at Aetrix Electronics and suitable for video distribution amplifiers, broadcast infrastructure equipment, and medical imaging interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for THS3111IDG4 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 over 50 years of high-reliability component design heritage.
The THS3111IDG4 belongs to TI's high-speed current-feedback op-amp product line, engineered specifically for broadcast video, test equipment, and industrial imaging systems demanding low distortion, high output drive, and thermal resilience.
FAQ
What is the maximum number of 75 Ω video loads the THS3111IDG4 can drive while maintaining broadcast video specifications?
The THS3111IDG4 maintains ≤0.015% differential gain and ≤0.033° differential phase error when driving up to eight 150 Ω loads - equivalent to four 75 Ω video lines with proper termination. This is validated in Figure 29 and Figure 30 of the THS3111IDG4 datasheet under ±15 V supply conditions with G = 2 and RF = 1 kΩ. Each load must be terminated at the destination to prevent reflections.
Does the THS3111IDG4 require external compensation for driving capacitive loads?
Yes - the THS3111IDG4 requires series isolation resistor (RISO) compensation when driving >10 pF capacitive loads. Figure 8 in the THS3111IDG4 datasheet specifies RISO = 54.9 Ω for 22 pF, 39.2 Ω for 47 pF, and 28 Ω for 100 pF. Without RISO, instability or peaking occurs above 10 MHz due to the current-feedback architecture's sensitivity to output capacitance.
What is the thermal performance difference between THS3111IDG4 and standard SOIC-8 op-amps?
The THS3111IDG4 incorporates TI's PowerPAD™ thermal enhancement: its θJA is 95°C/W (vs. >150°C/W for standard SOIC-8), enabling continuous 260 mA output into 100 Ω at +85°C ambient without derating. This is confirmed in the Dissipation Ratings Table (page 2) and allows operation at full specification without external heatsinks - unlike non-PowerPAD alternatives such as LMH6702MA.
Can the THS3111IDG4 operate from a single +30 V supply?
No - the THS3111IDG4 is specified only for dual-supply operation (±5 V to ±15 V) or single-supply operation from 10 V to 30 V with appropriate input/output voltage headroom. Per Absolute Maximum Ratings (page 3), the maximum total supply voltage is 33 V, but DC performance (input common-mode range, output swing) degrades outside the recommended operating conditions table - which defines valid single-supply operation only with VCM referenced to mid-supply and proper biasing.
How does the THS3111IDG4's current-feedback architecture affect PCB layout compared to voltage-feedback op-amps?
The THS3111IDG4's current-feedback design demands strict layout discipline: the inverting input (Pin 2) must have minimal trace length and no vias, feedback resistor (RF) must be placed adjacent to Pin 2 and Pin 7, and ground return paths for VS+ and VS− must be low-inductance. Unlike voltage-feedback op-amps, loop stability depends critically on RF value and parasitic capacitance at the inverting node - making layout as critical as component selection for achieving 90 MHz bandwidth.
THS3111IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1300V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 MHz
- Current - Input Bias:
- 1.5 µA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 4.8mA
- Current - Output / Channel:
- 260 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-SOIC
THS3111IDG4 FAQ
1.How can I place an order for THS3111IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS3111IDG4 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 THS3111IDG4 reliable?
The price and inventory of THS3111IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3111IDG4 is usually 5 days.
3.What payment methods are accepted for THS3111IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3111IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS3111IDG4?
THS3111IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS3111IDG4 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 THS3111IDG4?
For technical support, including THS3111IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3111IDG4 requirements.
6.How does Aetrix verify that THS3111IDG4 is sourced from the original manufacturer or authorized distributors?
All THS3111IDG4 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 THS3111IDG4 meets industry standards.
7.What is the process for return or replacement of THS3111IDG4?
All THS3111IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS3111IDG4, 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 THS3111IDG4 part is unused and in its original packaging.
Return procedure for THS3111IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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