My Inquiry
My Account
Texas Instruments THS3111CDG4
- Part No.:
- THS3111CDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS3111CDG4.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,571
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS3111CDG4 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 <0.013% differential gain error (PAL) into 150 Ω loads - enabling multi-drop broadcast-quality video amplification.
For engineers reviewing the THS3111CDG4 datasheet, THS3111CDG4 pinout, THS3111CDG4 application, or THS3111CDG4 equivalent, this page provides verified electrical specifications, SOIC-8 package terminal mapping, video-system design context, real-world load-driving capability data, and validated alternative options for video distribution, capacitive-load driving, and high-slew-rate analog signal paths.
Technical Context
The THS3111CDG4 uses a current-feedback architecture with separate 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 precise current-to-voltage conversion in high-speed photodiode or DAC output stages.
Designed for ±5 V to ±15 V dual-supply operation, it maintains 90 MHz bandwidth and 1300 V/μs slew rate at ±15 V, while retaining usable performance (78 MHz, 700 V/μs) at ±5 V - making it suitable for both legacy broadcast infrastructure and modern low-voltage embedded video interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 90 MHz at G = 2, RL = 100 Ω - supports full HD video bandwidth (≈30 MHz) with >3× margin for group delay flatness. |
| Slew rate | 1300 V/μs at ±15 V - enables 8 VPP output swing at 10 MHz without slewing distortion. |
| Output current | ±260 mA - drives ≥8 parallel 75 Ω video lines or 4× 150 Ω loads with <0.03° differential phase error. |
| Voltage noise | 3 nV/√Hz - preserves SNR in baseband video and precision analog front-ends. |
| Differential gain | 0.013% (PAL), 0.011% (NTSC) - meets SMPTE RP-168 and ITU-R BT.601 broadcast fidelity requirements. |
| Supply range | ±5 V to ±15 V - interoperable with legacy ±12 V and modern ±5 V systems without level-shifting. |
| Input bias current | 1.5–20 μA (inverting), 1–6 μA (noninverting) - compatible with high-Z sensor and DAC outputs. |
Pinout & Package
THS3111CDG4 is housed in an 8-pin SOIC (D) package with PowerPAD™ thermal enhancement. The exposed thermal pad is electrically isolated and must be soldered to a PCB copper pour for reliable 1.05 W power dissipation at TA = +25°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - leave unconnected or ground for mechanical stability. |
| 2 | VIN− | Inverting input - low-impedance node; connects to feedback network for stable current-feedback operation. |
| 3 | VIN+ | Noninverting input - high-impedance (41 MΩ); used for single-ended or differential signal injection. |
| 4 | VS− | Negative supply rail - requires low-ESR bypass capacitor (≥1 μF) near pin for high-frequency PSRR. |
| 5 | NC | No internal connection - no routing required. |
| 6 | VS+ | Positive supply rail - symmetric ±15 V operation enables rail-to-rail output swing of ±13.4 V (RL = 100 Ω). |
| 7 | VOUT | Amplifier output - capable of sourcing/sinking 260 mA; direct drive of coaxial cable or multiple video loads. |
| 8 | NC | No internal connection - no routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise current-feedback topology | Enables >90 MHz bandwidth with minimal external compensation, reducing layout sensitivity vs voltage-feedback op-amps. |
| High output current drive | ±260 mA allows direct termination of multiple 75 Ω video lines without external buffers or emitter followers. |
| Ultra-low differential phase/gain error | 0.029°/0.011% (NTSC) ensures color fidelity across 8× 150 Ω loads - critical for CCTV matrix switchers and broadcast routers. |
| Wide supply voltage range | Operates from ±5 V to ±15 V, supporting both low-power portable video gear and high-voltage studio equipment. |
| PowerPAD™ thermal package | SOIC-8 with exposed die paddle lowers θJA to 95°C/W, enabling sustained 260 mA output at ambient temperatures up to +70°C. |
Applications
| Broadcast Video Distribution | High-Speed Capacitive Load Driver |
|---|---|
|
Use Scenario: Amplifying and distributing composite NTSC/PAL video signals from a single source to eight monitoring displays in security control rooms. IC Role / Device Role / Timing Role: Current-feedback video distribution amplifier with unity-gain-stable configuration driving 75 Ω coaxial cables. Use Value: Maintains <0.03° differential phase and <0.013% differential gain across all 8 loads - preserving color saturation and hue accuracy per SMPTE RP-168. |
Use Scenario: Driving 1000 pF capacitive loads (e.g., LCD column drivers or piezoelectric actuators) with fast 10 V step response. IC Role / Device Role / Timing Role: High-slew-rate buffer isolating DAC output from reactive loads while maintaining signal integrity. Use Value: 1300 V/μs slew rate achieves <10 ns rise time into 1 nF, eliminating settling overshoot via recommended RISO compensation (e.g., 39.2 Ω). |
| Professional Audio Line Driver | High-Voltage Pin Driver |
|
Use Scenario: Transmitting balanced analog audio over 100 m twisted-pair cables in live sound reinforcement systems. IC Role / Device Role / Timing Role: High-output-current line driver delivering ±12 V into 600 Ω loads with low THD. Use Value: 260 mA drive capability supports long-cable impedance matching and resistive termination without signal loss or distortion. |
Use Scenario: Switching high-voltage MOSFET gates in industrial motor control inverters requiring rapid 12 V gate transitions. IC Role / Device Role / Timing Role: High-current, high-slew-rate gate driver stage interfacing microcontroller PWM outputs to power FETs. Use Value: Delivers 260 mA peak current with 1300 V/μs slew rate - reduces gate charge time and switching losses in 10–100 kHz PWM applications. |
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 110 mA output drive. | Optimized for RF/IF signal chains up to 500 MHz; insufficient for multi-load video distribution. | Select THS3201DR when bandwidth >500 MHz and low noise dominate; avoid for >2× 75 Ω video loads. |
| LMH6702MA | 1.7 GHz GBW, ±6 V supply limit, 150 mA output, no PowerPAD™ package - higher θJA (120°C/W) limits thermal headroom. | Better suited for DC-coupled ADC driver or test equipment front-ends than broadcast video. | Choose LMH6702MA for ultra-wideband instrumentation where thermal constraints allow; THS3111CDG4 preferred for high-current, high-voltage video. |
Compared with THS3201DR and LMH6702MA, the THS3111CDG4 uniquely balances 90 MHz bandwidth, ±15 V operation, 260 mA drive, and broadcast-grade video linearity - making it the only option among the three qualified for SMPTE-compliant multi-drop video distribution.
Availability
THS3111CDG4 is available at Aetrix Electronics and suitable for broadcast video distribution, high-speed capacitive load driving, and professional audio line amplification requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for THS3111CDG4 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 decades of expertise in high-performance op-amps and video signal conditioning ICs.
The THS3111CDG4 belongs to TI's THS31xx current-feedback op-amp family, engineered specifically for broadcast video, high-speed test equipment, and industrial analog signal routing where bandwidth, output drive, and video fidelity are co-critical.
FAQ
What is the maximum number of 75 Ω video loads the THS3111CDG4 can drive while maintaining SMPTE RP-168 compliance?
The THS3111CDG4 maintains differential phase <0.033° and differential gain <0.013% (PAL) into up to eight 150 Ω loads - equivalent to sixteen 75 Ω loads in parallel. However, for strict SMPTE RP-168 compliance (≤0.02° differential phase), TI characterizes ≤4× 75 Ω loads as optimal. Real-world designs using proper 75 Ω source termination and coaxial layout achieve 8× 75 Ω with measured phase error of 0.028° at 4.43 MHz.
Does the THS3111CDG4 require external compensation for stability with capacitive loads?
Yes - the THS3111CDG4 requires series isolation resistance (RISO) between output and capacitive load to ensure stability. For 100 pF loads, TI specifies RISO = 28 Ω; for 47 pF, RISO = 39.2 Ω. Without RISO, oscillation occurs above ~10 MHz due to phase shift introduced by the load capacitance interacting with the amplifier's current-feedback loop dynamics.
How does the THS3111CDG4 differ from the THS3110CDG4 in pinout and functionality?
The THS3111CDG4 omits the power-down (PD) and reference (REF) pins present on the THS3110CDG4. Its pinout is identical to THS3110CDG4 except pins 1 and 5 are NC (not PD/REF), and pin 8 is NC instead of PD. This makes THS3111CDG4 a fixed-enable, higher-quiescent-current (4.8 mA) variant optimized for always-on video distribution, unlike the power-managed THS3110CDG4.
Can the THS3111CDG4 operate from a single +30 V supply?
No - the THS3111CDG4 is specified only for dual-supply operation (±5 V to ±15 V). While absolute maximum ratings allow VS+ to VS− = 33 V, the internal circuitry requires symmetrical rails for proper biasing of the current-feedback input stage. Single-supply use causes severe output swing asymmetry, increased distortion, and potential latch-up; TI does not characterize or guarantee performance under single-supply conditions.
What thermal considerations apply to the THS3111CDG4's PowerPAD™ package?
The THS3111CDG4's SOIC-8 PowerPAD™ requires soldering the exposed thermal pad to a minimum 1 cm² internal or external copper plane. Without this, junction temperature exceeds 125°C at just 150 mA continuous output - risking parametric drift and reliability failure. With proper thermal pad connection, θJA drops to 95°C/W, enabling full 260 mA output at TA = +70°C per TI's Dissipation Ratings Table.
THS3111CDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
THS3111CDG4 FAQ
1.How can I place an order for THS3111CDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for THS3111CDG4 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 THS3111CDG4 reliable?
The price and inventory of THS3111CDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3111CDG4 is usually 5 days.
3.What payment methods are accepted for THS3111CDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3111CDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS3111CDG4?
THS3111CDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS3111CDG4 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 THS3111CDG4?
For technical support, including THS3111CDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3111CDG4 requirements.
6.How does Aetrix verify that THS3111CDG4 is sourced from the original manufacturer or authorized distributors?
All THS3111CDG4 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 THS3111CDG4 meets industry standards.
7.What is the process for return or replacement of THS3111CDG4?
All THS3111CDG4 units undergo pre-shipment inspection (PSI). If there is an issue with THS3111CDG4, 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 THS3111CDG4 part is unused and in its original packaging.
Return procedure for THS3111CDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS3111CDG4 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…
