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Texas Instruments THS3111IDGNR
- Part No.:
- THS3111IDGNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS3111IDGNR.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,991
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Product details
Overview
THS3111IDGNR from Texas Instruments is a low-noise, high-voltage current-feedback operational amplifier optimized for video distribution and high-speed analog signal routing. It delivers 90 MHz bandwidth (G = 2), 1300 V/μs slew rate, ±15 V supply operation, 260 mA output drive, and <0.015% differential gain error into 150 Ω loads - enabling multi-drop SD/HD video amplification in broadcast and professional AV systems.
For engineers reviewing the THS3111IDGNR datasheet, THS3111IDGNR pinout, THS3111IDGNR application, or THS3111IDGNR equivalent, key selection criteria include its current-feedback architecture for wide bandwidth stability, MSOP-8 PowerPAD™ thermal performance, differential gain/phase accuracy for NTSC/PAL compliance, and absence of power-down functionality compared to THS3110.
Technical Context
The THS3111IDGNR uses a current-feedback topology with high-impedance noninverting input (41 MΩ) and low-impedance inverting input, enabling stable gain-setting with resistive feedback networks independent of closed-loop gain. Its transimpedance gain of 1 MΩ supports precise current-to-voltage conversion in high-speed driver stages.
Designed for ±5 V to ±15 V dual-supply operation, it maintains 90 MHz small-signal bandwidth and 1300 V/μs slew rate at ±15 V, while preserving >45 dBc harmonic distortion at 10 MHz with 2 VPP output into 100 Ω. Input voltage noise is 3 nV/√Hz, and differential phase error remains ≤0.033° across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 90 MHz at G = 2, RL = 100 Ω - enables full HD video signal amplification without roll-off |
| Slew Rate | 1300 V/μs - supports fast 8-VPP transitions required for composite video sync pulses |
| Output Drive | ±13.4 V swing into 100 Ω, 260 mA sourcing/sinking - drives multiple 75 Ω coaxial lines via series termination |
| Differential Gain | 0.013% (PAL), 0.011% (NTSC) - meets SMPTE RP 168 broadcast video fidelity requirements |
| Supply Range | ±5 V to ±15 V - compatible with legacy analog video equipment rails and industrial power supplies |
| Input Noise | 3 nV/√Hz voltage noise, 2 pA/√Hz noninverting current noise - preserves SNR in low-level video pre-amplification |
| Package | MSOP-8 with PowerPAD™ - thermally enhanced 3×3 mm footprint for high-power-density video PCB layouts |
Pinout & Package
THS3111IDGNR is housed in an 8-pin MSOP package with exposed thermal pad (PowerPAD™), requiring solder connection to a PCB ground plane for thermal management per TI SLMA002 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference Bias Input | Internal bias node; must be connected to VS– or grounded for stable operation per datasheet Figure 1 |
| 2 (VIN−) | Inverting Input | Low-impedance current-summing node; sets feedback path in current-feedback configuration |
| 3 (VIN+) | Noninverting Input | High-impedance voltage-input node (41 MΩ); defines signal reference point |
| 4 (VS−) | Negative Supply Rail | Connects to negative supply; internal ESD protection tied to this pin |
| 5 (VS+) | Positive Supply Rail | Connects to positive supply; decoupling capacitor required within 1 cm |
| 6 (VOUT) | Amplifier Output | Capable of driving ≥75 Ω transmission lines directly; requires external 75 Ω series termination for video |
| 7, 8 (NC) | No Internal Connection | Unbonded pins; must remain unconnected and not routed on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Current-Feedback Architecture | Enables constant bandwidth across gain settings and stable operation with capacitive loads up to 100 pF using RISO compensation |
| Video-Optimized Linearity | Differential phase ≤0.033° and gain error ≤0.015% ensure broadcast-grade color fidelity in multi-load distribution |
| High Output Current | 260 mA sourcing/sinking allows direct drive of up to eight 150 Ω video loads without external buffers |
| Thermally Enhanced MSOP | PowerPAD™ reduces θJA to 58.4°C/W, enabling 685 mW power dissipation at +85°C ambient |
| Wide Supply Flexibility | Operates from ±5 V to ±15 V, supporting both portable video gear and rack-mounted broadcast infrastructure |
Applications
| Professional Video Distribution | Broadcast Camera Signal Conditioning |
|---|---|
Use Scenario: Amplifying and distributing composite NTSC/PAL signals from a single source to eight monitors in a production truck. IC Role / Device Role / Timing Role: High-current video distribution amplifier maintaining signal integrity across multiple 75 Ω coaxial runs. Use Value: Differential gain error <0.015% and phase error <0.033° preserve chroma timing and luminance fidelity across all outputs. | Use Scenario: Buffering and level-shifting camera sensor output before digitization in a 4K UHD camera head. IC Role / Device Role / Timing Role: High-slew-rate analog driver isolating sensitive image sensor circuitry from downstream ADC input capacitance. Use Value: 1300 V/μs slew rate ensures accurate reproduction of fast sync pulses and edge transitions in raw video data streams. |
| Industrial Machine Vision I/O | Medical Endoscopy Video Routing |
Use Scenario: Driving long coaxial cables between inspection cameras and control room displays in factory automation. IC Role / Device Role / Timing Role: Robust video line driver compensating for cable loss and impedance mismatch in harsh EMI environments. Use Value: ±15 V operation and 90 MHz bandwidth maintain signal clarity over 100 m RG-59 cable runs at 60 Hz frame rates. | Use Scenario: Splitting real-time endoscopic video feed to both surgical display and recording system simultaneously. IC Role / Device Role / Timing Role: Low-noise, low-distortion video splitter preserving diagnostic image contrast and color accuracy. Use Value: 3 nV/√Hz input voltage noise prevents degradation of low-light endoscopic signal SNR during amplification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3110IDGNR | Includes power-down (PD) pin; quiescent current drops to 270 μA in standby mode | Required where dynamic power gating is needed in battery-powered or thermally constrained systems | Select THS3110IDGNR only if power-down functionality is mandatory; THS3111IDGNR offers identical AC performance without PD overhead |
| LMH6702MF/NOPB | Higher 1.7 GHz unity-gain bandwidth but lower output current (120 mA) and no PowerPAD™ thermal enhancement | Better suited for RF IF amplification than multi-load video distribution due to limited drive capability | Choose LMH6702MF/NOPB for wideband signal chain stages requiring >1 GHz bandwidth; THS3111IDGNR preferred for video load-driving tasks |
Compared with THS3110IDGNR, THS3111IDGNR eliminates power-down circuitry to improve DC precision and reduce input bias current spread; versus LMH6702MF/NOPB, it trades raw bandwidth for superior thermal management and robust 260 mA output drive essential for broadcast video routing.
Availability
THS3111IDGNR is available at Aetrix Electronics and suitable for professional video distribution, broadcast camera signal conditioning, and industrial machine vision applications requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for THS3111IDGNR 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-speed amplifier design and video signal conditioning.
The THS3111 forms part of TI's high-voltage current-feedback op-amp family, engineered specifically for demanding analog video infrastructure - including multi-drop distribution, camera interface buffering, and broadcast-grade signal routing.
FAQ
What is the maximum number of 75 Ω video loads the THS3111IDGNR can drive while maintaining SMPTE-compliant differential phase?
The THS3111IDGNR maintains differential phase ≤0.033° and differential gain ≤0.015% when driving up to eight 150 Ω loads (equivalent to sixteen 75 Ω loads in parallel configuration), as verified in Figure 30 of the SLOS422E datasheet under ±15 V supply conditions. This makes THS3111IDGNR suitable for multi-monitor broadcast distribution without external fanout buffers.
Does the THS3111IDGNR include a power-down feature like the THS3110IDGNR?
No, the THS3111IDGNR does not include a power-down (PD) pin or associated circuitry. Unlike the THS3110IDGNR, which features a dedicated PD pin to reduce quiescent current to 270 μA, the THS3111IDGNR is optimized for continuous high-performance operation with no power-state switching capability. This simplifies layout and improves DC precision for always-on video systems.
What thermal design considerations apply to the THS3111IDGNR in MSOP-8 PowerPAD™ package?
The THS3111IDGNR's MSOP-8 PowerPAD™ requires soldering the exposed thermal pad to a minimum 3×3 mm copper pour connected to PCB ground for effective heat dissipation. Per TI SLMA002, this achieves θJA = 58.4°C/W, enabling 685 mW power dissipation at +85°C ambient. Failure to connect the PowerPAD™ risks exceeding the +125°C maximum junction temperature during sustained 260 mA output operation.
Can the THS3111IDGNR operate from a single +30 V supply instead of dual ±15 V rails?
Yes, the THS3111IDGNR supports single-supply operation from +10 V to +30 V, as specified in the Recommended Operating Conditions table. When using +30 V, the input common-mode range extends from –12.5 V to +12.5 V, and output swing reaches ±12 V into 100 Ω. However, optimal video performance (e.g., differential gain/phase specs) is characterized at ±15 V; single-supply use requires careful level-shifting and biasing of VIN+ and REF pins.
What is the recommended feedback resistor value for achieving G = 2 with the THS3111IDGNR in inverting configuration?
For G = –2 in inverting configuration, the THS3111IDGNR datasheet specifies RF = 1.1 kΩ with RL = 100 Ω and ±15 V supplies (Figure 6). This value balances bandwidth (90 MHz), stability, and harmonic distortion (<48 dBc at 10 MHz). Using RF = 1 kΩ - as used in noninverting G = 2 - is acceptable but may slightly increase peaking; always verify stability with actual layout parasitics and load capacitance.
THS3111IDGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-HVSSOP
THS3111IDGNR FAQ
1.How can I place an order for THS3111IDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS3111IDGNR 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 THS3111IDGNR reliable?
The price and inventory of THS3111IDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3111IDGNR is usually 5 days.
3.What payment methods are accepted for THS3111IDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3111IDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS3111IDGNR?
THS3111IDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS3111IDGNR 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 THS3111IDGNR?
For technical support, including THS3111IDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3111IDGNR requirements.
6.How does Aetrix verify that THS3111IDGNR is sourced from the original manufacturer or authorized distributors?
All THS3111IDGNR 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 THS3111IDGNR meets industry standards.
7.What is the process for return or replacement of THS3111IDGNR?
All THS3111IDGNR units undergo pre-shipment inspection (PSI). If there is an issue with THS3111IDGNR, 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 THS3111IDGNR part is unused and in its original packaging.
Return procedure for THS3111IDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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