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Analog Devices Inc. LT6558IGN#PBF
- Part No.:
- LT6558IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT6558IGN#PBF.pdf
- Description:
- IC AMP GENERAL PURPOSE 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,478
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Product details
Overview
LT6558IGN#PBF from Analog Devices (acquired Linear Technology) is a high-speed triple video amplifier with fixed gain of 1, programmable DC input bias control, 400MHz large-signal bandwidth, 2200V/µs slew rate, and rail-to-rail output swing within 0.8V of supply rails-designed for RGB HD video amplification in single 5V supply systems such as LCD projectors and coaxial cable drivers.
For engineers reviewing the LT6558IGN#PBF datasheet, LT6558IGN#PBF pinout, LT6558IGN#PBF application, or LT6558IGN#PBF equivalent, key selection criteria include AC-coupled input bias programmability via BCV pin, channel-isolated power/ground pins for crosstalk suppression, ±90mA output drive capability, differential gain/phase accuracy (0.02%/0.02°), and support for 3V–7.5V supply operation across –40°C to 85°C.
Technical Context
The LT6558IGN#PBF integrates three independent unity-gain video amplifiers with separate V+ and GND pins per channel to minimize inter-channel crosstalk and simplify bypassing. Its internal bias control circuitry allows all inputs to be set to a common DC level using a single resistor between BCV (Pin 16) and GND (Pin 2), enabling simplified AC-coupled RGB signal conditioning without external clamps.
Each amplifier features a high-output-current architecture capable of driving 150Ω loads to full video swing (2VP-P) while maintaining 0.02% differential gain and 0.02° differential phase error-critical for NTSC/PAL video fidelity. The enable/shutdown pin (Pin 1) provides fast 50ns turn-on and 1µs shutdown response with <10µA quiescent current in disabled state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Large-Signal Bandwidth | 400MHz at 2VP-P output - supports full HD (1080p) video signals with minimal attenuation |
| Slew Rate | 2200V/µs - enables clean transient response for fast video edges without overshoot or distortion |
| Output Swing Range | 0.8V to 4.2V on 5V supply - delivers full 2VP-P video swing with headroom for DC bias and noise margin |
| Differential Gain / Phase | 0.02% / 0.02° - preserves color fidelity in broadcast-quality analog video transmission |
| Supply Voltage Range | 3V to 7.5V - compatible with industrial 3.3V, standard 5V, and extended-range 7.5V systems |
| Operating Temperature | –40°C to +85°C - qualified for embedded video equipment in demanding thermal environments |
| Channel Isolation | –80dB at 10MHz - ensures minimal RGB crosstalk in high-resolution projector and monitor designs |
Pinout & Package
The LT6558IGN#PBF is packaged in a 16-lead SSOP (GN package), with exposed pad not present-distinct from the DFN variant. Pin functions are fully isolated per channel to suppress inter-channel interference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable/Shutdown Control | Pull low to enable; open or pulled high disables amplifier with ~10µA supply current |
| GND (Pin 2) | Global Ground Reference | Reference for EN and BCV pins; must connect externally to system ground |
| IN R/G/B (Pins 3,5,7) | Video Input Terminals | High-impedance (450kΩ) noninverting inputs; accept AC- or DC-coupled RGB signals |
| GND R/G/B (Pins 4,6,8) | Per-Channel Ground Returns | Independent ground paths per amplifier-reduces crosstalk and improves PSRR |
| V+ B/G/R (Pins 9,11,13) | Per-Channel Positive Supplies | Separate V+ connections allow localized bypassing and minimize supply coupling |
| OUT B/G/R (Pins 10,12,14) | Video Output Drivers | Capable of ±90mA continuous output into 150Ω loads with 0.8V rail margin |
| V+ (Pin 15) | Control Circuit Supply | Supplies internal bias and enable logic-bypass separately from amplifier supplies |
| BCV (Pin 16) | Bias Control Voltage Input | Connect resistor to GND to program common-mode input bias for AC-coupled applications |
Key Features
| Feature | Design Value |
|---|---|
| Triple unity-gain video amplifiers with independent power/ground | Enables simultaneous RGB amplification with >–80dB channel isolation at 10MHz |
| Programmable input DC bias via single BCV resistor | Eliminates need for external clamp circuits in AC-coupled video front-ends |
| Rail-swing output stage (0.8V from rails) | Delivers full 2VP-P video swing on 5V supply without negative rail or level-shifting |
| Fast enable/shutdown with 50ns turn-on | Supports dynamic power management in portable or energy-sensitive video systems |
| Low differential gain/phase error (0.02%/0.02°) | Meets broadcast-grade NTSC video fidelity requirements without post-processing |
Applications
| RGB HD Video Amplifier | Coaxial Cable Driver |
|---|---|
Use Scenario: Driving RGB signals from graphics processor to panel interface in 1080p LCD projectors. IC Role / Device Role / Timing Role: Triple unity-gain buffer amplifying red, green, and blue baseband video channels with matched delay and gain. Use Value: Maintains 0.02% differential gain and 0.02° phase accuracy across all channels-preserving color saturation and hue integrity over long PCB traces. | Use Scenario: Transmitting analog HD video over 75Ω coaxial cables in broadcast monitoring equipment. IC Role / Device Role / Timing Role: High-current video driver delivering 2VP-P into 75Ω load with 400MHz large-signal bandwidth. Use Value: Sustains full video bandwidth with <0.1dB gain flatness up to 100MHz-minimizing high-frequency roll-off and edge ringing. |
| Single-Supply ADC Driver | Video Signal Distribution Amplifier |
Use Scenario: Conditioning composite video signals prior to digitization in medical imaging or test equipment. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer isolating source from ADC input capacitance and providing precise DC bias. Use Value: 2200V/µs slew rate prevents distortion on fast video transients; output swing to 0.8V of 5V rail ensures full dynamic range utilization. | Use Scenario: Splitting one RGB video source to multiple displays in digital signage or control room systems. IC Role / Device Role / Timing Role: Three-channel fan-out amplifier with independent outputs and minimized inter-channel crosstalk. Use Value: –80dB hostile crosstalk at 10MHz prevents ghosting or color bleed between distributed outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6554CGN#PBF | Same 16-lead SSOP package, identical pinout, 650MHz small-signal bandwidth, but no BCV bias control circuitry | Lacks programmable input bias-requires external clamping or DC restoration for AC-coupled inputs | Select when higher small-signal bandwidth is prioritized over integrated bias programming |
| LT6557CGN#PBF | 500MHz large-signal bandwidth, same 2200V/µs slew rate, optimized for 75Ω cable drive, includes BCV pin | Lower large-signal bandwidth limits usable resolution; optimized specifically for coaxial cable termination | Select when driving long 75Ω cables dominates design requirements over general-purpose video buffering |
Compared with LT6558IGN#PBF, LT6554CGN#PBF trades integrated bias control for higher small-signal bandwidth, while LT6557CGN#PBF offers cable-optimized drive strength at reduced large-signal bandwidth-making LT6558IGN#PBF the balanced choice for general-purpose RGB amplification with programmable AC coupling.
Availability
LT6558IGN#PBF is available at Aetrix Electronics and suitable for LCD video projectors, RGB HD video amplifiers, and coaxial cable drivers requiring stable component supply, long-term lifecycle assurance, and guaranteed temperature-grade performance.
Supply support for LT6558IGN#PBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT6558IGN#PBF belongs to ADI's legacy Linear Technology video amplifier product line, engineered specifically for high-fidelity analog RGB signal conditioning in single-supply, space-constrained video systems.
FAQ
What is the operating supply voltage range for the LT6558IGN#PBF?
The LT6558IGN#PBF operates from 3V to 7.5V single supply, with full specified performance-including 400MHz large-signal bandwidth and 0.02% differential gain-at 5V. Operation outside this range may compromise output swing, slew rate, or thermal stability. The LT6558IGN#PBF is not rated for dual-supply configurations unless ground pins are tied to the negative rail per application note guidelines.
How does the BCV (Bias Control Voltage) pin function in the LT6558IGN#PBF?
The BCV pin (Pin 16) on the LT6558IGN#PBF accepts a resistor to GND to generate a programmable DC bias voltage applied simultaneously to all three amplifier inputs-enabling simplified AC-coupled RGB signal conditioning. With a 158Ω resistor, it sets nominal input bias to ~2.5V on 5V supply. Leaving BCV open disables internal biasing, yielding ~450kΩ input impedance for DC-coupled use. The LT6558IGN#PBF does not support voltage injection or active bias control at this pin.
Does the LT6558IGN#PBF support true rail-to-rail output swing?
No-the LT6558IGN#PBF delivers output swing to within 0.8V of each supply rail (e.g., 0.8V to 4.2V on 5V), not true rail-to-rail. This 0.8V headroom is intentional to sustain ±90mA output current and preserve linearity under heavy capacitive or resistive loads. Attempting to drive beyond this range risks clipping, increased distortion, or thermal overload. The LT6558IGN#PBF specification explicitly defines VOL = 0.9V and VOH = 4.1V (typical) at 5V supply.
What is the thermal limitation for the LT6558IGN#PBF in SSOP package?
The LT6558IGN#PBF in GN (SSOP) package has a maximum junction temperature (TJMAX) of 150°C and thermal resistance θJA = 110°C/W. To avoid exceeding TJMAX, ambient temperature plus power dissipation × 110°C/W must remain below 150°C. For example, at TA = 70°C and 75mA total supply current on 5V, PD ≈ 375mW → ΔT = 41°C → TJ ≈ 111°C-within safe margin. Adequate PCB copper area and local bypassing are essential for sustained operation.
Can the LT6558IGN#PBF be used with split supplies?
Yes-the LT6558IGN#PBF supports split-supply operation by connecting its GND pins to the negative rail (e.g., –2.5V) and V+ pins to the positive rail (e.g., +2.5V), resulting in ±2.5V operation. Input common-mode range and output swing scale accordingly. However, the internal bias control circuitry (BCV) and enable logic assume referenced-to-ground operation; proper level-shifting of control signals is required. The LT6558IGN#PBF datasheet confirms functionality down to ±2.5V, but full AC performance validation is recommended per application.
LT6558IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- General Purpose
- Output Type:
- -
- Number of Circuits:
- 3
- -3db Bandwidth:
- 550 MHz
- Slew Rate:
- 2200V/µs
- Current - Supply:
- 22.5 mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply, Single/Dual (±):
- 3V ~ 7.5V, ±2.5V ~ 3.3V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SSOP
LT6558IGN#PBF FAQ
1.How can I place an order for LT6558IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6558IGN#PBF 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 LT6558IGN#PBF reliable?
The price and inventory of LT6558IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6558IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT6558IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6558IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6558IGN#PBF?
LT6558IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6558IGN#PBF 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 LT6558IGN#PBF?
For technical support, including LT6558IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6558IGN#PBF requirements.
6.How does Aetrix verify that LT6558IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT6558IGN#PBF 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 LT6558IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT6558IGN#PBF?
All LT6558IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6558IGN#PBF, 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 LT6558IGN#PBF part is unused and in its original packaging.
Return procedure for LT6558IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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