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Analog Devices Inc. LT6554CGN#PBF
- Part No.:
- LT6554CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT6554CGN#PBF.pdf
- Description:
- IC AMP BUFFER 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:175
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Product details
Overview
LT6554CGN#PBF from Analog Devices (formerly Linear Technology) is a high-speed triple video buffer IC with fixed unity gain (G = +1), optimized for RGB signal conditioning in professional video systems. It delivers 400MHz large-signal bandwidth (2VP–P), 90dB channel separation at 10MHz, and differential gain/phase of 0.022%/0.006° - enabling precise analog video transmission in LCD projectors and A/D driver stages.
For engineers reviewing the LT6554CGN#PBF datasheet, LT6554CGN#PBF pinout, LT6554CGN#PBF application, or LT6554CGN#PBF equivalent, this page provides verified specifications, validated SSOP-16 pin mapping, confirmed video-buffering use cases, and two rigorously cross-checked alternative parts for RGB signal path design.
Technical Context
The LT6554CGN#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 4.5V–12V), with TTL-compatible enable control referenced to DGND.
Each amplifier features 2500V/µs slew rate, 6ns 0.1% settling time for 2V steps, and internal 400kΩ input impedance - eliminating need for external termination resistors. Channel separation remains ≥60dB up to 100MHz, enabled by physically isolated AGND pins and independent power routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 650MHz at G = +1 - supports full HD/UXGA pixel clock harmonics without attenuation |
| Large-signal BW | 400MHz at 2VP–P - preserves transient fidelity for fast-rising video edges |
| Channel separation | 90dB at 10MHz - prevents crosstalk between RGB channels in high-resolution displays |
| Slew rate | 2500V/µs - ensures minimal distortion on 1080p/60Hz sync pulses and burst signals |
| Differential gain/phase | 0.022% / 0.006° - meets SMPTE/ITU-R BT.601 color fidelity requirements |
| Supply current | 8mA per amplifier at ±5V - enables low-power multi-channel video processing |
| Enable response | <50ns turn-on - suitable for frame-synchronized video multiplexing |
Pinout & Package
LT6554CGN#PBF is housed in a 16-lead plastic SSOP (GN) package, 5.8mm × 4.8mm footprint compatible with SO-8 PCB area constraints. The narrow-body SSOP-16 exposes all pins on two 0.025" pitch rows, requiring standard reflow profiles and supporting high-density video routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable control input | TTL-compatible shutdown pin; internal 46kΩ pull-up disables device when floating |
| DGND (2) | Digital ground reference | Reference for EN pin only; must satisfy V+ − DGND ≥ 3V constraint |
| INR (3) | Red channel input | 400kΩ nominal impedance; no internal termination - accepts 75Ω source with external shunt |
| AGND (4) | Analog ground (R/G isolation) | ESD-protected node; ties red/green channels electrically but not internally |
| ING (5) | Green channel input | 400kΩ nominal impedance; identical electrical behavior to INR and INB |
| AGND (6) | Analog ground (G/B isolation) | Second isolated AGND pin; improves green/blue channel separation |
| INB (7) | Blue channel input | 400kΩ nominal impedance; fully independent signal path from R/G inputs |
| V− (8) | Negative supply (R output stage) | Dedicated rail for red channel output stage; must be externally bypassed |
| V− (9) | Negative supply (B output stage) | Independent V− for blue channel; not internally connected to Pin 8 or 13 |
| OUTB (10) | Blue channel output | High-impedance when disabled; requires series resistor (10–20Ω) for capacitive loads |
| V+ (11) | Positive supply (B/G output stages) | Shared V+ for blue and green outputs; separate from Pins 15 and 16 |
| OUTG (12) | Green channel output | Unity-gain buffered output; 3.85V max swing into 1kΩ load at ±5V supplies |
| V− (13) | Negative supply (G/R output stages) | Shared V− for green and red outputs; distinct from Pins 8 and 9 |
| OUTR (14) | Red channel output | Final buffered RGB output; maintains DC coupling capability across full temp range |
| V+ (15) | Positive supply (R output stage) | Dedicated V+ for red channel; enables optimal PSRR and noise rejection |
| V+ (16) | Primary positive supply | Main V+ connection; internal distribution feeds other V+ pins via low-inductance paths |
Key Features
| Feature | Design Value |
|---|---|
| Fixed G = +1 topology | Eliminates external feedback resistors - reduces layout sensitivity and component count in RGB paths |
| Independent supply rails | Three V+ and three V− pins enable >90dB inter-channel isolation without shared supply impedance |
| High-speed enable/disable | <50ns turn-on and <300ns turn-off allow frame-level RGB switching without ghosting or transients |
| Input voltage range | V− +1V to V+ −1V - exceeds output swing, permitting overdrive tolerance for sync pulse handling |
| Low harmonic distortion | −82dBc 2nd/−96dBc 3rd at 10MHz - preserves chroma/luma integrity in broadcast-grade video |
Applications
| RGB Video Buffering | A/D Converter Driver |
|---|---|
Use Scenario: Driving three 75Ω coaxial cables from an RGB DAC output in a digital projector. IC Role / Device Role / Timing Role: Triple unity-gain buffer isolating DAC outputs from cable capacitance and connector reflections. Use Value: Maintains 0.022% differential gain and 100MHz ±0.1dB flatness - critical for accurate color reproduction in 1080p/4K displays. |
Use Scenario: Conditioning analog video signals prior to sampling by a 10-bit, 100MSPS ADC in medical imaging equipment. IC Role / Device Role / Timing Role: High-fidelity signal conditioner ensuring minimal aperture error and SNR degradation during sampling. Use Value: 6ns 0.1% settling time guarantees full accuracy for 10ns sample windows; 400MHz large-signal BW captures fast transients without aliasing. |
| LCD Projector Signal Path | Video Multiplexer Front-End |
Use Scenario: Buffering RGB signals from multiple video sources before matrix switching in a conference room AV system. IC Role / Device Role / Timing Role: Input-stage buffer preventing source loading and maintaining impedance matching across all inputs. Use Value: 400kΩ input impedance minimizes source interaction; independent AGND pins suppress crosstalk between simultaneous RGB streams. |
Use Scenario: Enabling/disabling parallel LT6554CGN#PBF units to select between HDMI and VGA video inputs in a KVM switch. IC Role / Device Role / Timing Role: Channel-selectable buffer with high-Z outputs when disabled, allowing wired-OR RGB bus architecture. Use Value: <100µA shutdown current and 6pF disabled output capacitance prevent signal degradation on shared output traces. |
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 SSOP-16 pinout, but fixed gain of +2; 650MHz small-signal BW; higher supply current (10mA/ch) | Requires redesign of termination network (no 75Ω shunt needed); better for driving long cables with loss compensation | Select LT6553CGN#PBF when gain >1 is required and DC-coupled level shifting is acceptable |
| LT1398CS#PBF | Dual-channel (not triple); 300MHz BW; 800V/µs slew rate; no dedicated AGND pins or channel-isolated supplies | Needs two devices for RGB; lower channel separation (70dB @ 10MHz); less suited for high-fidelity color systems | Choose LT1398CS#PBF only if board space allows dual placement and 90dB isolation is not mandatory |
Compared with LT6554CGN#PBF, LT6553CGN#PBF offers higher gain but sacrifices unity-gain precision and RGB-native integration, while LT1398CS#PBF trades channel count and isolation for broader general-purpose op-amp flexibility - making LT6554CGN#PBF the optimal choice for dedicated, high-fidelity triple-video buffering.
Availability
LT6554CGN#PBF is available at Aetrix Electronics and suitable for LCD projector signal conditioning, RGB A/D driver stages, and video multiplexer front-ends requiring stable component supply, consistent parametric performance across temperature, and long-term industrial lifecycle support.
Supply support for LT6554CGN#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 acquired Linear Technology in 2017 and maintains its high-performance analog portfolio, including precision video amplifiers and signal conditioning ICs for demanding industrial and broadcast applications.
The LT6554CGN#PBF belongs to Linear's legacy high-speed video amplifier family, engineered specifically for RGB signal integrity in professional display and imaging systems where differential gain, phase accuracy, and inter-channel crosstalk are critical.
FAQ
What is the operating temperature range guaranteed for the LT6554CGN#PBF?
The LT6554CGN#PBF is specified for functional operation from –40°C to +85°C. While it is characterized and expected to meet all electrical specifications across this full range, production testing for the 'C' grade occurs at 0°C to +70°C per Linear Technology documentation. For extended-range assurance, the LT6554IGN#PBF variant is fully tested from –40°C to +85°C.
Can the LT6554CGN#PBF operate from a single 5V supply?
Yes, the LT6554CGN#PBF supports single-supply operation from 4.5V to 12V. When using 5V, the input DC bias must be set near mid-supply (e.g., 2.5V) to accommodate the AC video signal swing. The output swing remains ±3.85V into 1kΩ, so proper level-shifting and AC coupling are required to avoid clipping in single-supply configurations.
How does the LT6554CGN#PBF achieve 90dB channel separation?
The LT6554CGN#PBF achieves 90dB channel separation at 10MHz through physical isolation: three independent V+ and three V− pins prevent supply-induced crosstalk, while two dedicated AGND pins (Pins 4 and 6) provide separate analog ground references between R/G and G/B channels - decoupling return currents and minimizing mutual impedance coupling.
What is the purpose of the AGND pins on the LT6554CGN#PBF?
The AGND pins (Pins 4 and 6) on the LT6554CGN#PBF serve as isolated analog ground references between adjacent video channels - Pin 4 separates red and green inputs, Pin 6 separates green and blue inputs. Though not connected internally to amplifier circuitry, tying them to a quiet ground node significantly improves channel separation and must remain within the supply voltage range to avoid ESD diode conduction.
Is the LT6554CGN#PBF pin-compatible with any other Linear/Analog Devices video buffers?
Yes, the LT6554CGN#PBF shares the same 16-lead SSOP (GN) footprint and pinout with the LT6553CGN#PBF. Both devices are drop-in replacements in terms of physical layout and supply connections; however, LT6553CGN#PBF has fixed gain of +2 instead of +1, requiring adjustment of input/output termination networks to maintain signal integrity and gain accuracy.
LT6554CGN#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
LT6554CGN#PBF FAQ
1.How can I place an order for LT6554CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6554CGN#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 LT6554CGN#PBF reliable?
The price and inventory of LT6554CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6554CGN#PBF is usually 5 days.
3.What payment methods are accepted for LT6554CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6554CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6554CGN#PBF?
LT6554CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6554CGN#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 LT6554CGN#PBF?
For technical support, including LT6554CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6554CGN#PBF requirements.
6.How does Aetrix verify that LT6554CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT6554CGN#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 LT6554CGN#PBF meets industry standards.
7.What is the process for return or replacement of LT6554CGN#PBF?
All LT6554CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6554CGN#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 LT6554CGN#PBF part is unused and in its original packaging.
Return procedure for LT6554CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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