My Inquiry
My Account
Texas Instruments THS3111IDGN
- Part No.:
- THS3111IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
THS3111IDGN.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:160
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS3111IDGN from Texas Instruments is a high-voltage, current-feedback operational amplifier optimized for video distribution and high-speed analog signal amplification. It delivers 260 mA output current drive, 1300 V/μs slew rate at ±15 V supply, 90 MHz small-signal bandwidth (G = 2, RL = 100 Ω), and differential gain/phase of 0.013%/0.033° (PAL) into 150 Ω loads - enabling multi-drop broadcast-grade video routing.
For engineers reviewing the THS3111IDGN datasheet, THS3111IDGN pinout, THS3111IDGN application, or THS3111IDGN equivalent, key selection criteria include its MSOP-8 PowerPAD™ package thermal performance, current-feedback architecture for wide bandwidth stability, low 3-nV/√Hz voltage noise, and verified video distortion metrics across NTSC/PAL standards under varying load counts.
Technical Context
The THS3111IDGN employs a current-feedback topology with high-impedance inverting input and low-impedance output, enabling stable operation up to 90 MHz at gain = 2 without phase compensation. Its transimpedance gain of ≥0.5 MΩ supports precise current-to-voltage conversion in high-speed driver stages.
Designed for ±5 V to ±15 V dual-supply operation, it maintains 1300 V/μs slew rate and ≤0.033° differential phase error into eight 150 Ω video loads - confirming suitability for broadcast infrastructure where signal fidelity across distributed outputs is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 90 MHz at G = 2, RL = 100 Ω - enables full HD video bandwidth support without roll-off |
| Slew rate | 1300 V/μs at ±15 V, RL = 100 Ω - sustains 8-VPP output swings at >10 MHz without slewing distortion |
| Differential gain error | 0.013% (PAL), 0.011% (NTSC) - meets SMPTE RP 168 broadcast linearity requirements |
| Differential phase error | 0.033° (PAL), 0.029° (NTSC) - preserves color fidelity across multi-load video distribution |
| Output current drive | ±260 mA - drives up to eight 75 Ω transmission lines simultaneously with <0.1% gain error |
| Voltage noise density | 3 nV/√Hz - minimizes added noise in low-level analog signal paths such as camera front-ends |
| Supply range | ±5 V to ±15 V - supports legacy ±12 V and modern ±15 V video processing rails |
Pinout & Package
THS3111IDGN uses an 8-pin MSOP package with exposed PowerPAD™ thermal pad (DGN suffix), requiring solder connection to PCB ground plane for thermal management per TI SLMA002 guidelines. The PowerPAD is electrically isolated from all pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Reference voltage input | DC bias point for internal circuitry; functional range VS− to (VS+ − 4 V) |
| 2 (VIN−) | Inverting input | High-impedance node for current-feedback configuration; sets closed-loop gain with RF |
| 3 (VIN+) | Noninverting input | Low-noise input terminal; 0.4 pF capacitance minimizes high-frequency instability |
| 4 (VS−) | Negative supply rail | Connects to −5 V to −15 V; PSRR −69 dB ensures rejection of negative rail noise |
| 5 (VS+) | Positive supply rail | Connects to +5 V to +15 V; PSRR +75 dB suppresses positive rail interference |
| 6 (VOUT) | Amplifier output | Capable of ±13.4 V swing into 100 Ω; 0.15 Ω closed-loop impedance aids cable driving |
| 7 (NC) | No internal connection | Not bonded; must remain unconnected or grounded per layout best practices |
| 8 (NC) | No internal connection | Not bonded; floating or grounded - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Enables flat frequency response up to 90 MHz independent of closed-loop gain setting |
| PowerPAD™ thermal enhancement | Reduces θJA to 58.4°C/W, allowing 685 mW power dissipation at TA = +85°C |
| Low differential phase/gain error | 0.033°/0.013% PAL performance validated across 1–8 × 150 Ω loads per datasheet Fig. 29–30 |
| High output current capability | ±260 mA sourcing/sinking enables direct drive of multiple 75 Ω coaxial video lines |
| Wide supply flexibility | Operates from ±5 V to ±15 V - compatible with both portable and broadcast-grade power systems |
Applications
| Video Distribution Amplifier | High-Speed Pin Driver |
|---|---|
Use Scenario: Distributing composite video signals from a single source to eight monitors in broadcast control rooms. IC Role / Device Role / Timing Role: Current-feedback video buffer with gain = 2, driving parallel 75 Ω coaxial cables. Use Value: Maintains <0.033° differential phase error across all eight outputs, preserving color accuracy without external equalization. |
Use Scenario: Driving high-capacitance LCD column electrodes in industrial display controllers. IC Role / Device Role / Timing Role: High-slew-rate buffer stage translating digital logic levels to analog pixel voltages. Use Value: 1300 V/μs slew rate ensures <20 ns rise/fall times into 1000 pF loads, eliminating ghosting artifacts. |
| Capacitive Load Driver | Power FET Gate Driver |
Use Scenario: Driving long PCB traces (>15 cm) with >500 pF total capacitance in medical imaging front-ends. IC Role / Device Role / Timing Role: Stable unity-gain buffer with RISO compensation per datasheet Figure 8. Use Value: Sustains 0.1-dB flatness to 45 MHz into 100 pF loads, preserving pulse integrity in ultrasound beamforming. |
Use Scenario: Switching 100 nC gate charge MOSFETs in high-frequency DC-DC converters. IC Role / Device Role / Timing Role: High-current gate driver delivering 260 mA peak to minimize turn-on delay. Use Value: Reduces MOSFET switching transition time by >40% versus standard op-amps, cutting conduction losses. |
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 |
|---|---|---|---|
| THS3121IDGN | Higher 175 MHz bandwidth but lower 180 mA output current; requires tighter layout due to increased sensitivity to parasitics | Better suited for >100 MHz RF IF amplification; less robust for multi-load video distribution | Select THS3121IDGN only when bandwidth >120 MHz is mandatory and load count ≤4 |
| LMH6723MA/NOPB | Lower 1100 V/μs slew rate, 70 MHz bandwidth, and 120 mA output; no PowerPAD™ thermal enhancement | Adequate for single-load HD video or test equipment; not rated for sustained 8-load operation | Choose LMH6723MA/NOPB for cost-sensitive designs where thermal headroom and multi-load drive are non-critical |
Compared with THS3111IDGN, THS3121IDGN trades output drive and thermal robustness for higher bandwidth, while LMH6723MA/NOPB offers simpler layout and lower cost at the expense of video-grade distortion performance and thermal margin.
Availability
THS3111IDGN 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 THS3111IDGN 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 over 90 years of innovation in high-performance signal chain solutions.
The THS3111IDGN belongs to TI's high-speed current-feedback op-amp product line, engineered specifically for broadcast video, test instrumentation, and high-fidelity analog signal routing where bandwidth, drive strength, and video distortion metrics are critical.
FAQ
What is the maximum number of 75 Ω video loads the THS3111IDGN can drive while maintaining SMPTE-compliant differential phase?
The THS3111IDGN is characterized to drive up to eight 150 Ω loads (equivalent to four 75 Ω loads in parallel) with differential phase error ≤0.033° (PAL) and ≤0.029° (NTSC) per datasheet Figures 29–30. For true 75 Ω coaxial distribution, use two THS3111IDGN devices in parallel or add series 37.5 Ω termination to maintain impedance match and distortion performance. THS3111IDGN data confirms worst-case 0.033° at eight 150 Ω loads under ±15 V, G = 2 conditions.
Does the THS3111IDGN require external compensation when driving capacitive loads?
Yes - the THS3111IDGN requires external RISO isolation resistance for stable operation into capacitive loads >10 pF. Datasheet Figure 8 specifies RISO = 54.9 Ω for 22 pF, 39.2 Ω for 47 pF, and 28 Ω for 100 pF loads. Omitting RISO causes peaking and potential oscillation due to the current-feedback architecture's sensitivity to output capacitance. THS3111IDGN's recommended RISO values are validated across temperature and supply voltage.
How does the PowerPAD™ thermal pad on the THS3111IDGN improve thermal performance compared to SOIC-8 packages?
The THS3111IDGN's MSOP-8 PowerPAD™ reduces θJA to 58.4°C/W versus 95°C/W for SOIC-8 (D), enabling 685 mW power dissipation at +85°C ambient - a 62% increase. This allows sustained 260 mA output into heavy loads without thermal shutdown. Per TI SLMA002, the PowerPAD must be soldered to a minimum 76 mm × 76 mm copper plane; THS3111IDGN's thermal design assumes this layout for rated performance.
Can the THS3111IDGN operate from a single +12 V supply?
No - the THS3111IDGN is specified only for dual-supply operation (±5 V to ±15 V). Its input common-mode range is ±12.5 V at ±15 V supply, and absolute maximum ratings prohibit asymmetric or single-supply configurations. Attempting +12 V/0 V operation violates the ±4 V differential input limit and risks latch-up. THS3111IDGN requires symmetrical rails; for single-supply video amps, consider TI's THS7374 or similar rail-to-rail alternatives.
What is the purpose of the REF pin on the THS3111IDGN, and how should it be configured?
The REF pin on THS3111IDGN sets the internal bias reference level and must be connected within VS− to (VS+ − 4 V). In most video applications, it is tied to ground (0 V) for DC-coupled operation. Datasheet Section 7.3 confirms REF = 0 V is valid for ±15 V supplies. Floating REF or exceeding the voltage range causes undefined offset and gain errors. THS3111IDGN's REF pin has no power-down function - that feature exists only on THS3110 variants.
THS3111IDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Bulk
- 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
THS3111IDGN FAQ
1.How can I place an order for THS3111IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for THS3111IDGN 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 THS3111IDGN reliable?
The price and inventory of THS3111IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3111IDGN is usually 5 days.
3.What payment methods are accepted for THS3111IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3111IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS3111IDGN?
THS3111IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS3111IDGN 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 THS3111IDGN?
For technical support, including THS3111IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3111IDGN requirements.
6.How does Aetrix verify that THS3111IDGN is sourced from the original manufacturer or authorized distributors?
All THS3111IDGN 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 THS3111IDGN meets industry standards.
7.What is the process for return or replacement of THS3111IDGN?
All THS3111IDGN units undergo pre-shipment inspection (PSI). If there is an issue with THS3111IDGN, 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 THS3111IDGN part is unused and in its original packaging.
Return procedure for THS3111IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS3111IDGN 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…
