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Texas Instruments THS3111CDR
- Part No.:
- THS3111CDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS3111CDR.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,696
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Product details
Overview
THS3111CDR 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 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 into 150 Ω loads - enabling multi-drop broadcast-quality video amplification.
For engineers reviewing the THS3111CDR datasheet, THS3111CDR pinout, THS3111CDR application, or THS3111CDR equivalent, key selection criteria include its current-feedback architecture for wide bandwidth stability, differential gain/phase performance in NTSC/PAL systems, thermal design with PowerPAD™, and SOIC-8 package compatibility with legacy video line-driver layouts.
Technical Context
The THS3111CDR uses a current-feedback topology with high-impedance noninverting input (41 MΩ) and low-impedance inverting input, enabling stable gain-setting via feedback resistor (RF = 1 kΩ typical) without degrading bandwidth. Its transimpedance gain of 1 MΩ supports precise current-to-voltage conversion in high-speed sensor interfaces.
Unlike voltage-feedback op-amps, the THS3111CDR maintains flat frequency response up to 90 MHz at G = 2 due to its unity-gain bandwidth of 100 MHz and minimal phase shift - critical for preserving edge integrity in HD video signals and fast pulse applications like pin drivers and capacitive load switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 90 MHz at G = 2, RL = 100 Ω - enables full HD video signal amplification without roll-off |
| Slew rate | 1300 V/μs at VO = 8 VPP - supports >10 MHz large-swing transient fidelity |
| Differential gain | 0.013% (PAL), 0.011% (NTSC) - meets broadcast-grade video linearity specs |
| Output current | ±260 mA into RL = 25 Ω - drives multiple 75 Ω coaxial lines or heavy capacitive loads |
| Voltage noise | 3 nV/√Hz - preserves SNR in low-level analog signal chains |
| Supply range | ±5 V to ±15 V - accommodates industrial and broadcast power rails |
| Input current noise | 2 pA/√Hz (noninverting), 10 pA/√Hz (inverting) - minimizes current-source interface errors |
Pinout & Package
THS3111CDR is housed in an 8-pin SOIC (D) package with exposed PowerPAD™ thermal pad on the underside, requiring solder connection to a PCB copper plane for thermal management per TI SLMA002 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must be left floating or grounded per layout best practice |
| 2 (VIN−) | Inverting input | Low-impedance node for feedback network; sets closed-loop gain with RF |
| 3 (VIN+) | Noninverting input | High-impedance (41 MΩ) input for signal source; minimal loading on source |
| 4 (VS−) | Negative supply rail | Connects to −15 V (or −5 V); PowerPAD™ must be thermally coupled to ground plane |
| 5 (NC) | No internal connection | Unused pin; no electrical function |
| 6 (VS+) | Positive supply rail | Connects to +15 V (or +5 V); decoupling capacitor required within 1 cm |
| 7 (VOUT) | Amplifier output | Capable of ±13.4 V swing into 100 Ω; drives 75 Ω transmission lines directly |
| 8 (NC) | No internal connection | Unused pin; no routing or connection required |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables constant bandwidth vs. gain - 90 MHz at G = 2, 66 MHz at G = 10 - unlike voltage-feedback op-amps |
| PowerPAD™ thermal enhancement | Reduces θJA to 95°C/W (SOIC-8), allowing 1.05 W dissipation at TA = +25°C with proper PCB copper area |
| Video-optimized linearity | Differential phase <0.033° and gain error <0.013% ensure broadcast-compliant NTSC/PAL signal reproduction |
| High output current drive | ±260 mA sourcing/sinking capability eliminates need for external buffer stages in multi-load video distribution |
| Low noise floor | 3 nV/√Hz voltage noise + 2 pA/√Hz noninverting current noise preserves dynamic range in precision analog front-ends |
Applications
| Video Distribution Amplifier | High-Speed Pin Driver |
|---|---|
Use Scenario: Distributing composite video (NTSC/PAL) from one source to eight 75 Ω coaxial outputs in broadcast equipment. IC Role / Device Role / Timing Role: Current-feedback video amplifier providing gain = 2 with minimal differential gain/phase distortion across all outputs. Use Value: Maintains <0.013% differential gain and <0.033° phase error even when driving eight 150 Ω loads - eliminating post-amplifier correction circuitry. | Use Scenario: Driving high-capacitance test points or relay coils in automated test equipment (ATE) with fast digital pulses. IC Role / Device Role / Timing Role: High-slew-rate buffer delivering 8-V step transitions with <8 ns rise/fall time into 100 Ω. Use Value: 1300 V/μs slew rate ensures sub-10 ns edge fidelity, reducing timing skew in parallel pin-test architectures. |
| Capacitive Load Driver | Power FET Gate Driver |
Use Scenario: Driving 1 nF capacitive loads in active filter or ADC anti-aliasing stages without oscillation. IC Role / Device Role / Timing Role: Stable current-feedback amplifier with recommended RISO compensation (e.g., 39.2 Ω for 47 pF). Use Value: Maintains >45 dB 0.1-dB bandwidth flatness into 1 nF loads - avoids peaking and settling degradation seen in VFB op-amps. | Use Scenario: Directly driving the gate of a 10 nF power MOSFET in a high-frequency DC-DC converter. IC Role / Device Role / Timing Role: High-current output stage sourcing/sinking 260 mA to minimize gate charge/discharge time. Use Value: Reduces MOSFET switching transition time by >40% versus standard op-amps, lowering conduction losses at 500 kHz switching. |
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 |
|---|---|---|---|
| THS3201DR | Higher 1.8 GHz gain-bandwidth, lower 1.8 nV/√Hz noise, but only ±12 V max supply and no PowerPAD™ | Better for RF IF amplification; unsuitable for ±15 V video systems or thermal-limited PCBs | Select THS3201DR only if bandwidth >500 MHz is required and supply is ≤±12 V |
| LMH6702MF/NOPB | 1.7 GHz GBW, 3.3 nV/√Hz noise, SOIC-8 package, but 120 mA output current and no specified differential gain/phase data | Valid for generic high-speed buffering; lacks video-specific characterization for broadcast compliance | Choose LMH6702MF/NOPB when video linearity specs are not mandated and higher frequency is prioritized over drive strength |
Compared with THS3111CDR, THS3201DR offers superior bandwidth but sacrifices ±15 V operation and thermal robustness, while LMH6702MF/NOPB trades output drive and video-spec validation for raw speed - making THS3111CDR the optimal choice for broadcast video and high-current, high-voltage analog signal distribution.
Availability
THS3111CDR is available at Aetrix Electronics and suitable for video distribution amplifiers, high-speed pin drivers, capacitive load drivers, and power FET gate drivers requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for THS3111CDR 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 innovation in high-performance analog ICs.
The THS3111CDR belongs to TI's high-speed current-feedback op-amp product line, engineered specifically for demanding video, test equipment, and high-current analog signal-path applications where bandwidth, linearity, and drive capability are critical.
FAQ
What is the maximum supply voltage rating for THS3111CDR?
The THS3111CDR has an absolute maximum supply voltage rating of ±16 V, with recommended operating range from ±5 V to ±15 V. Operation at ±15 V enables full specification compliance including 90 MHz bandwidth, 1300 V/μs slew rate, and ±13.4 V output swing into 100 Ω - all verified per SLOS422E datasheet Section 6.2.
Does THS3111CDR support video standards like NTSC and PAL?
Yes, THS3111CDR is explicitly characterized for video applications: differential gain is 0.011% (NTSC) and 0.013% (PAL), differential phase is 0.029° (NTSC) and 0.033° (PAL) at G = 2, RL = 150 Ω, VS = ±15 V - meeting broadcast-grade linearity requirements per Figure 29 and 30 in the THS3111CDR datasheet.
Is a heatsink required for THS3111CDR in SOIC-8 package?
Yes - the THS3111CDR D-package includes a PowerPAD™ thermal pad that must be soldered to a PCB copper plane per TI SLMA002 guidelines. Without this thermal connection, junction temperature exceeds limits under 1.05 W dissipation; proper layout achieves θJA = 95°C/W and enables continuous operation at TA = +25°C.
Can THS3111CDR drive multiple 75 Ω coaxial cables simultaneously?
Yes, THS3111CDR is validated to drive up to eight 150 Ω loads (equivalent to four 75 Ω cables in parallel) with differential gain error <0.03% and phase error <0.04° - demonstrated in Figures 29 and 30 of the THS3111CDR datasheet using 40 IRE NTSC/PAL test signals and worst-case ±100 IRE ramp conditions.
What is the small-signal bandwidth of THS3111CDR at gain = 5?
The THS3111CDR delivers 87 MHz small-signal bandwidth (–3 dB) at gain = 5, RF = 806 Ω, RL = 100 Ω, and VS = ±15 V per Table 1 in the SLOS422E datasheet. This remains stable across temperature (–40°C to +85°C) and exceeds competing voltage-feedback op-amps at the same gain setting.
THS3111CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS3111CDR FAQ
1.How can I place an order for THS3111CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS3111CDR 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 THS3111CDR reliable?
The price and inventory of THS3111CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3111CDR is usually 5 days.
3.What payment methods are accepted for THS3111CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3111CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS3111CDR?
THS3111CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS3111CDR 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 THS3111CDR?
For technical support, including THS3111CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3111CDR requirements.
6.How does Aetrix verify that THS3111CDR is sourced from the original manufacturer or authorized distributors?
All THS3111CDR 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 THS3111CDR meets industry standards.
7.What is the process for return or replacement of THS3111CDR?
All THS3111CDR units undergo pre-shipment inspection (PSI). If there is an issue with THS3111CDR, 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 THS3111CDR part is unused and in its original packaging.
Return procedure for THS3111CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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