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Analog Devices Inc. LT6554IGN#PBF
- Part No.:
- LT6554IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT6554IGN#PBF.pdf
- Description:
- IC AMP BUFFER 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:218
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Product details
Overview
LT6554IGN#PBF from Analog Devices (formerly Linear Technology) is a high-speed triple video buffer IC with fixed gain of 1, optimized for RGB signal conditioning in professional video systems. It delivers 400MHz large-signal bandwidth (2VP–P), 90dB channel separation at 10MHz, and ±3.85V output swing on ±5V supplies-enabling direct drive of 75Ω video lines in LCD projectors and A/D converter front-ends.
For engineers reviewing the LT6554IGN#PBF datasheet, LT6554IGN#PBF pinout, LT6554IGN#PBF application, or LT6554IGN#PBF equivalent, key selection criteria include its 2500V/µs slew rate, differential gain/phase accuracy (0.022%/0.006°), TTL-compatible enable control, and 16-pin SSOP package with isolated supply pins per channel.
Technical Context
The LT6554IGN#PBF integrates three independent current-feedback amplifiers on a proprietary low-voltage complementary bipolar process, each with dedicated V+ and V– supply pins to maximize inter-channel isolation. Its architecture supports dual-supply operation from ±2.25V to ±6V or single-supply operation from 4.5V to 12V, with internal 46kΩ pull-up on EN pin enabling TTL-compatible shutdown.
Each amplifier features 400kΩ input impedance, no external gain-setting resistors required, and achieves 6ns 0.1% settling time for 2V steps. Channel separation is maintained via physically isolated AGND pins between R/G/B paths and separate power rails-critical for maintaining >60dB crosstalk suppression up to 100MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 650MHz at G = 1 - enables full HD/UXGA pixel clock support without attenuation |
| Large-Signal Bandwidth | 400MHz at 2VP–P - preserves transient fidelity for fast video edges and sync pulses |
| Slew Rate | 2500V/µs - ensures minimal distortion on 1080p/60Hz rising/falling edges |
| Differential Gain/Phase | 0.022% / 0.006° - meets SMPTE/ITU-R BT.601 broadcast video color fidelity requirements |
| Channel Separation | 90dB at 10MHz - prevents RGB crosstalk in multi-channel analog video routing |
| Enable Current (Disabled) | <100µA total - reduces system standby power in portable or battery-backed video gear |
| Supply Range | ±2.25V to ±6V (or 4.5V–12V single) - supports legacy ±5V and modern low-voltage designs |
Pinout & Package
LT6554IGN#PBF is housed in a 16-lead plastic SSOP (GN) package, 0.150-inch narrow body, with 0.025" pitch. Pin 1 is EN (enable), and all V+ and V– pins are electrically isolated to preserve channel separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | TTL-compatible; internal 46kΩ pull-up disables device when floating; drives output to high-Z state |
| DGND (2) | Digital ground reference | Reference for EN pin only; must satisfy V+ − DGND ≥ 3V and VEN − DGND ≤ 5.5V |
| INR (3) | Red channel input | 400kΩ input impedance; accepts DC-coupled or AC-coupled RGB signals up to V− +1V / V+ −1V |
| AGND (4) | Analog ground (R/G isolation) | ESD-protected node; ties red/green channels' analog grounds to improve isolation beyond 90dB |
| ING (5) | Green channel input | Identical to INR; independent path with matched gain and phase response |
| AGND (6) | Analog ground (G/B isolation) | Separate from Pin 4; isolates green/blue channels to maintain wideband crosstalk rejection |
| INB (7) | Blue channel input | Same electrical specs as INR/ING; completes RGB triad with matched performance |
| V− (8) | Negative supply (red output stage) | Not internally connected to other V− pins; requires local bypassing for optimal PSRR and noise |
| V− (9) | Negative supply (blue output stage) | Independent rail; enables independent power domain partitioning per channel |
| OUTB (10) | Blue channel output | High-drive capability (±105mA short-circuit); designed for 75Ω back-terminated video loads |
| V+ (11) | Positive supply (blue/green output stages) | Shared V+ for B/G outputs; still maintains >60dB isolation at 100MHz due to layout and AGND |
| OUTG (12) | Green channel output | Matches OUTB/OUTR in slew, settling, and harmonic distortion (−96dBc 3rd at 10MHz) |
| V− (13) | Negative supply (green/red output stages) | Shared rail for G/R outputs; decoupling critical to prevent supply-induced crosstalk |
| OUTR (14) | Red channel output | Full 2VP–P swing into 1kΩ; compatible with DC794 demo board's 75Ω series termination |
| V+ (15) | Positive supply (red output stage) | Dedicated V+ for red channel; enhances channel-to-channel PSRR and transient immunity |
| V+ (16) | Positive supply (main) | Primary V+ connection; all V+ pins must be externally tied together with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent buffers with isolated supplies | Enables simultaneous RGB buffering with >90dB inter-channel isolation at baseband video frequencies |
| Fixed gain of 1 (no external resistors) | Eliminates gain-setting component count and matching errors in high-resolution video signal chains |
| TTL-compatible enable with <50ns turn-on | Supports dynamic RGB multiplexing in video switchers and portable display systems |
| ±3.85V output swing into 1kΩ | Drives standard 75Ω video lines with headroom for sync tips and blanking intervals |
| 0.1dB gain flatness to 100MHz | Preserves color fidelity and edge sharpness across full NTSC/PAL/HD video bandwidth |
| Low harmonic distortion (−96dBc 3rd at 10MHz) | Meets broadcast-grade video SNR requirements without post-filtering or calibration |
Applications
| RGB Video Buffering | A/D Converter Driver |
|---|---|
|
Use Scenario: Driving RGB analog outputs from graphics processors or FPGA video engines to 75Ω coaxial cables feeding LCD projectors or broadcast monitors. IC Role / Device Role / Timing Role: Triple unity-gain buffer providing matched delay, amplitude, and phase across R/G/B channels to preserve color registration and timing alignment. Use Value: Eliminates differential skew <10ps and maintains 0.022% differential gain error-critical for accurate color reproduction in professional displays. |
Use Scenario: Conditioning composite RGB signals prior to sampling by high-speed ADCs (e.g., 10-bit, 100MSPS+) in medical imaging or test equipment. IC Role / Device Role / Timing Role: High-fidelity signal conditioner with 6ns 0.1% settling time and 650MHz small-signal bandwidth to avoid aperture uncertainty and aliasing. Use Value: Enables full-scale 2VP–P input capture with <0.5 LSB integral nonlinearity degradation from buffer-induced distortion. |
| LCD Projector Signal Path | Video Multiplexer Front-End |
|
Use Scenario: Buffering RGB signals inside high-brightness LCD projectors where thermal stability and EMI immunity are critical. IC Role / Device Role / Timing Role: Low-noise, high-PSRR triple amplifier operating on ±5V rails with separate V+/V− per channel to suppress supply coupling between color channels. Use Value: Achieves >60dB channel separation at 100MHz-prevents luminance bleed and false color artifacts during rapid scene changes. |
Use Scenario: Enabling/disabling parallel LT6554IGN#PBF units in RGB video switchers using synchronized EN control. IC Role / Device Role / Timing Role: Fast-switching buffer with <50ns enable delay and high-Z outputs when disabled-allows seamless source switching without glitches. Use Value: Supports sub-frame switching in real-time video routing with no visible tearing or level shifts between sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple video buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6553CGN#PBF | Same 16-pin SSOP package and pinout; fixed gain of +2 instead of +1; identical bandwidth and slew rate | Requires external 75Ω shunt termination at input for unity-gain operation; higher output drive capability (±120mA) | Select LT6553CGN#PBF when gain boosting is needed before cable drive or when higher output current is required. |
| LT1398CS#PBF | Triple CFA in 16-pin SOIC; 300MHz bandwidth, 800V/µs slew rate; no integrated enable; ±15V max supply | Lacks channel-isolated supplies and AGND pins; lower channel separation (70dB @ 10MHz); no differential gain/phase spec | Choose LT1398CS#PBF only for cost-sensitive industrial video where broadcast-grade fidelity is not required. |
Compared with LT6554IGN#PBF, LT6553CGN#PBF offers identical layout compatibility but requires redesign of termination networks for gain adjustment, while LT1398CS#PBF sacrifices channel isolation and video-specific linearity for wider supply range and lower unit cost.
Availability
LT6554IGN#PBF is available at Aetrix Electronics and suitable for LCD projector signal conditioning, RGB video multiplexing, and high-speed A/D converter driver applications requiring stable component supply and long-term production continuity.
Supply support for LT6554IGN#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT6554IGN#PBF belongs to Linear's precision video amplifier product line, engineered specifically for broadcast, medical, and industrial video systems demanding ultra-low distortion, precise gain matching, and robust channel isolation.
FAQ
What is the operating temperature range for LT6554IGN#PBF?
The LT6554IGN#PBF is specified for operation from –40°C to +85°C and is guaranteed to meet all electrical specifications across this full industrial temperature range. The 'I' grade designation in the part number confirms this extended qualification, making LT6554IGN#PBF suitable for embedded video systems deployed in harsh environments such as outdoor kiosks or factory-floor displays.
Can LT6554IGN#PBF operate from a single 5V supply?
Yes, LT6554IGN#PBF supports single-supply operation from 4.5V to 12V. When powered from 5V, the input common-mode range extends from 1V to 4V, and the output swing reaches ±1.9V into 1kΩ. Proper DC biasing of inputs (e.g., mid-rail via resistor divider) is required, and bypass capacitors must be placed close to all V+ and V– pins-even if V– is tied to ground-to maintain stability and PSRR.
How does the LT6554IGN#PBF achieve 90dB channel separation?
LT6554IGN#PBF achieves 90dB channel separation at 10MHz through physical design: separate V+ and V– pins per channel, dedicated AGND pins between R/G and G/B inputs, and internal isolation of supply domains. This architecture minimizes supply- and ground-borne crosstalk. Layout best practices-including split ground planes and short, shielded traces-are essential to realize this spec in end systems.
Is LT6554IGN#PBF pin-compatible with any other Linear/Analog Devices video buffers?
Yes, LT6554IGN#PBF shares the same 16-pin SSOP footprint and pinout with LT6553CGN#PBF. Both devices have identical pin assignments for EN, INR/ING/INB, OUTR/OUTG/OUTB, and all supply/ground terminals. This allows drop-in replacement when gain-of-2 functionality is acceptable-or when redesigning termination networks to accommodate the higher gain.
What is the maximum capacitive load LT6554IGN#PBF can drive without peaking?
LT6554IGN#PBF can drive up to ~10pF of capacitive load (e.g., 4cm PCB trace) with minimal peaking when a 10Ω series resistor is added at the output. Without series resistance, driving >2pF may cause gain peaking above 100MHz. The "Maximum Capacitive Load vs Output Series Resistor" graph in the datasheet shows that 10Ω series resistance supports stable operation with up to 20pF load, preserving flat frequency response up to 400MHz.
LT6554IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Buffer
- Output Type:
- -
- Number of Circuits:
- 3
- -3db Bandwidth:
- 650 MHz
- Slew Rate:
- 2500V/µs
- Current - Supply:
- 8 mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 12V, ±2.25V ~ 6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SSOP
LT6554IGN#PBF FAQ
1.How can I place an order for LT6554IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6554IGN#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 LT6554IGN#PBF reliable?
The price and inventory of LT6554IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6554IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT6554IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6554IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6554IGN#PBF?
LT6554IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6554IGN#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 LT6554IGN#PBF?
For technical support, including LT6554IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6554IGN#PBF requirements.
6.How does Aetrix verify that LT6554IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT6554IGN#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 LT6554IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT6554IGN#PBF?
All LT6554IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6554IGN#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 LT6554IGN#PBF part is unused and in its original packaging.
Return procedure for LT6554IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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