My Inquiry
My Account
Texas Instruments THS3111ID
- Part No.:
- THS3111ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS3111ID.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:204
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS3111ID from Texas Instruments is a low-noise, high-voltage, current-feedback operational amplifier optimized for video distribution and high-speed analog signal conditioning. 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 <0.015% differential gain error with PAL/NTSC video loads - enabling multi-drop 75-Ω video line driving in broadcast and professional AV equipment.
For engineers reviewing the THS3111ID datasheet, THS3111ID pinout, THS3111ID application, or THS3111ID equivalent, this page provides verified pin functions, industrial-grade temperature performance (–40°C to +85°C), SOIC-8 package details, video-specific distortion metrics, and validated alternatives for video amplifier replacement and system-level design validation.
Technical Context
The THS3111ID uses a current-feedback architecture with high-impedance noninverting input (41 MΩ) and low-impedance inverting input, enabling stable wideband gain configurations up to G = 10 without phase compensation. Its transimpedance gain of 1 MΩ supports precision current-to-voltage conversion in sensor interfaces.
It operates across ±5 V to ±15 V dual supplies, delivering rail-to-rail output swing (±13.4 V into 100 Ω at ±15 V) and maintaining <0.033° differential phase error across 8× 150-Ω video loads - confirming suitability for analog video fanout without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 90 MHz at G = 2, RL = 100 Ω - supports full HD baseband video (up to ~30 MHz) with ample margin for group delay flatness. |
| Slew rate | 1300 V/μs into 100 Ω - enables 8-VPP output steps at >10 MHz without slewing-induced distortion. |
| Differential gain error | 0.013% (PAL), 0.011% (NTSC) - meets SMPTE RP 168 and ITU-R BT.601 broadcast video fidelity requirements. |
| Output current drive | ±260 mA - drives ≥8× 75-Ω video lines simultaneously while maintaining <0.4% differential gain degradation. |
| Input voltage noise | 3 nV/√Hz - preserves SNR in low-level analog signal paths such as camera front-end amplification. |
| Supply range | ±5 V to ±15 V - compatible with legacy analog video systems using ±12 V or ±15 V rails. |
| Operating temperature | –40°C to +85°C - qualified for industrial and broadcast equipment deployed in uncontrolled environments. |
Pinout & Package
THS3111ID 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 power dissipation at continuous 421 mW (TA = +25°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - left floating or grounded per layout best practice for noise control. |
| 2 | VIN− | Inverting input - low-impedance node; requires matched trace length and termination for current-feedback stability. |
| 3 | VIN+ | Noninverting input - high-impedance (41 MΩ); sensitive to parasitic capacitance; guard ring recommended. |
| 4 | VS− | Negative supply rail - decoupling capacitor (≥0.1 μF ceramic + 10 μF tantalum) required within 5 mm. |
| 5 | NC | No internal connection - not bonded; electrically isolated. |
| 6 | VS+ | Positive supply rail - same decoupling requirement as VS−; symmetric layout critical for PSRR. |
| 7 | VOUT | Amplifier output - directly drives 75-Ω coaxial lines; series RISO (e.g., 39.2 Ω) needed for >100 pF capacitive loads. |
| 8 | NC | No internal connection - unused; may be tied to ground for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback topology | Enables constant bandwidth vs. gain setting - simplifies design of G = 2 to G = 10 video gain stages without recompensation. |
| 75-Ω video line drive capability | Validated differential gain/phase performance across 8× 150-Ω loads confirms direct interface to standard SD/HD video distribution networks. |
| Low 3-nV/√Hz input voltage noise | Maintains >70 dB SNR in 0–10 MHz video bandwidth, critical for high-fidelity analog component video (Y/Pb/Pr) signal chains. |
| High output current (±260 mA) | Eliminates need for external emitter/source followers in multi-output video buffer designs, reducing BOM count and board area. |
| Industrial temperature grade | –40°C to +85°C operation ensures reliability in broadcast trucks, security DVRs, and medical imaging displays without derating. |
Applications
| Professional Video Distribution | Broadcast Camera Signal Conditioning |
|---|---|
|
Use Scenario: Distributing composite or component video signals from a single source to multiple monitors or recording devices in live production trucks. IC Role / Device Role / Timing Role: High-current video buffer amplifier driving eight 75-Ω coaxial cables simultaneously. Use Value: Maintains <0.015% differential gain and <0.033° differential phase across all outputs - preserving color fidelity and sync integrity without external equalization. |
Use Scenario: Amplifying analog RGB or YPbPr outputs from broadcast-grade CMOS image sensors before ADC sampling. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate driver stage preceding 10-bit+ video ADCs operating at 74.25 MHz (HD-SDI pixel clock). Use Value: 3-nV/√Hz input noise and 1300 V/μs slew rate prevent SNR degradation and edge rounding in fast-rising video pixel transitions. |
| Medical Endoscopy Imaging | Industrial Machine Vision Interface |
|
Use Scenario: Transmitting real-time analog video from minimally invasive endoscopic cameras over long flexible cables to display units. IC Role / Device Role / Timing Role: Output driver compensating for cable loss and maintaining DC-coupled video baseline stability. Use Value: ±13.4 V output swing into 100 Ω and –40°C to +85°C rating ensure consistent image brightness and contrast across clinical operating environments. |
Use Scenario: Buffering analog video outputs from smart cameras to PLC vision processors or FPGA-based frame grabbers. IC Role / Device Role / Timing Role: Robust interface amplifier tolerant of ESD events and ground-loop induced common-mode transients. Use Value: 68 dB minimum CMRR and 900 V/μs recommended max slew rate suppress motion artifacts and timing jitter in high-speed inspection systems. |
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 |
|---|---|---|---|
| THS3201DR | Higher 1.8-GHz gain-bandwidth, lower 1.6-nV/√Hz noise, but only ±12 V max supply and no industrial temp grade. | Limited to commercial-temp (0°C to +70°C) systems; unsuitable for field-deployed broadcast gear requiring –40°C startup. | Select THS3201DR only when ultra-low noise (<2 nV/√Hz) and >500 MHz bandwidth are prioritized over supply voltage headroom and temperature range. |
| LMH6702MA | 1.7-GHz GBW, ±6 V max supply, 100-mA output drive, and no PowerPAD thermal enhancement. | Cannot drive 8× 75-Ω loads without gain compression; requires external heat sinking above 100 mW dissipation. | Choose LMH6702MA for compact PCB layouts where space prohibits SOIC-8 PowerPAD footprint, accepting reduced load count and thermal margin. |
Compared with THS3111ID, THS3201DR offers superior noise and bandwidth but sacrifices industrial temperature support and ±15 V operation, while LMH6702MA trades output drive and thermal robustness for smaller size and higher speed - making THS3111ID the optimal balance for multi-load, high-reliability video distribution.
Availability
THS3111ID is available at Aetrix Electronics and suitable for professional video distribution, broadcast camera signal conditioning, and medical endoscopy imaging requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for THS3111ID 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 op-amps and video signal chain solutions.
The THS3111ID belongs to TI's high-voltage current-feedback op-amp family, engineered specifically for demanding analog video infrastructure - including broadcast, medical imaging, and industrial vision - where bandwidth, drive strength, and video fidelity are non-negotiable.
FAQ
What is the maximum number of 75-Ω video loads the THS3111ID can drive while maintaining broadcast video specifications?
The THS3111ID maintains differential gain error ≤0.03% and differential phase error ≤0.04° across up to eight 150-Ω loads - which corresponds to eight 75-Ω video lines when terminated properly. This is confirmed by Figure 29 and Figure 30 in the THS3111ID datasheet (SLOS422E), measured at G = 2, RF = 1 kΩ, VS = ±15 V, and 40 IRE NTSC/PAL signals. Exceeding eight loads increases distortion beyond SMPTE RP 168 limits.
Does the THS3111ID include a power-down feature like the THS3110?
No, the THS3111ID does not include a power-down (PD) pin or related circuitry. That functionality is exclusive to the THS3110 variant, as explicitly stated in the "Power-Down Characteristics" section of the THS3110/THS3111 datasheet. The THS3111ID operates continuously when powered and draws 4.8 mA typical quiescent current at ±15 V - a key differentiator when selecting between THS3110ID and THS3111ID for low-power standby applications.
What is the recommended feedback resistor value for a G = 2 noninverting configuration with the THS3111ID?
The THS3111ID datasheet specifies RF = 1 kΩ for G = 2 in all AC performance tables (e.g., bandwidth, slew rate, harmonic distortion) under ±15 V operation. This value ensures optimal stability, bandwidth flatness, and distortion performance. Using significantly higher or lower values risks peaking, reduced bandwidth, or degraded differential phase - especially critical in video applications. Layout symmetry and 1% tolerance metal-film resistors are strongly advised.
Can the THS3111ID drive capacitive loads such as coaxial cables without external isolation components?
The THS3111ID requires external series isolation resistance (RISO) for stable operation into capacitive loads >10 pF. Figure 8 in the THS3111ID datasheet shows recommended RISO values: 54.9 Ω for 10–22 pF, 39.2 Ω for 47 pF, and 28 Ω for 100 pF. Direct connection to long coaxial runs (>1 m) without RISO causes gain peaking and potential oscillation. Always place RISO adjacent to the VOUT pin and use controlled-impedance routing.
Is the THS3111ID pin-compatible with other members of the THS31xx family?
Yes, the THS3111ID shares identical SOIC-8 (D) pinout with THS3110ID, THS3110CD, THS3111CD, and all D- and DGN-package variants in the THS3110/THS3111 family. Pin 1 (NC), Pin 2 (VIN−), Pin 3 (VIN+), Pin 4 (VS−), Pin 5 (NC), Pin 6 (VS+), Pin 7 (VOUT), and Pin 8 (NC) are functionally and physically identical. However, THS3110 variants include a PD pin (replacing Pin 5 NC), so PCBs designed for THS3110 must not assume Pin 5 is unused on THS3111ID.
THS3111ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
THS3111ID FAQ
1.How can I place an order for THS3111ID through Aetrix?
Please submit a Request for Quotation (RFQ) for THS3111ID 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 THS3111ID reliable?
The price and inventory of THS3111ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3111ID is usually 5 days.
3.What payment methods are accepted for THS3111ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3111ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS3111ID?
THS3111ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS3111ID 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 THS3111ID?
For technical support, including THS3111ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3111ID requirements.
6.How does Aetrix verify that THS3111ID is sourced from the original manufacturer or authorized distributors?
All THS3111ID 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 THS3111ID meets industry standards.
7.What is the process for return or replacement of THS3111ID?
All THS3111ID units undergo pre-shipment inspection (PSI). If there is an issue with THS3111ID, 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 THS3111ID part is unused and in its original packaging.
Return procedure for THS3111ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS3111ID 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…
