LVDS Transmitter Flat Panel Display 85MHz 56-TSSOP -10 to 70# DS90C385AMTXNOPB Technical Documentation
## 1. Application Scenarios
### Typical Use Cases
The DS90C385AMTXNOPB from Texas Instruments (formerly National Semiconductor) is a 24-bit FPD-Link II deserializer primarily designed for high-speed digital video transmission in embedded systems. Key applications include:
- Automotive Infotainment Systems : Transmitting digital video from head units to TFT-LCD displays in center consoles and instrument clusters
- Rear-Seat Entertainment : Streaming video content from media sources to passenger displays
- Surround-View Systems : Processing multiple camera inputs for automotive safety applications
- Industrial Display Interfaces : Connecting control units to industrial HMI panels and monitoring displays
- Medical Imaging Displays : Transmitting high-resolution video from imaging equipment to diagnostic monitors
### Industry Applications
- Automotive : Meets AEC-Q100 Grade 2 qualification (-40°C to +105°C operating temperature)
- Industrial Automation : Robust operation in harsh environments with extended temperature ranges
- Medical Equipment : Compliant with medical display requirements for diagnostic accuracy
- Avionics : Suitable for in-flight entertainment systems and cockpit displays
- Consumer Electronics : High-end display applications requiring reliable long-distance transmission
### Practical Advantages and Limitations
Advantages:
- High Integration : Single-chip solution reduces component count and board space
- EMI Reduction : Embedded clock architecture minimizes electromagnetic interference
- Long Distance Transmission : Capable of transmitting 24-bit RGB data up to 10 meters over standard coaxial cable
- DC-Balanced Encoding : Ensures reliable data recovery and reduces baseline wander
- Low Power Consumption : Typically 120mW operating power for energy-efficient designs
Limitations:
- Fixed Data Rate : Limited to specific pixel clock frequencies (20-85 MHz)
- Cable Dependency : Performance heavily dependent on cable quality and length
- Single Direction : Unidirectional data flow limits bidirectional communication
- Component Matching : Requires specific serializer (DS90C383/384) for proper operation
## 2. Design Considerations
### Common Design Pitfalls and Solutions
Pitfall 1: Improper Clock Recovery
- Issue : Unstable display or complete loss of video signal
- Solution : Ensure incoming data meets jitter specifications (<0.3UI) and maintain proper signal integrity
Pitfall 2: Power Supply Noise
- Issue : Visual artifacts and color corruption in displayed content
- Solution : Implement proper power supply decoupling with 0.1μF and 10μF capacitors close to power pins
Pitfall 3: ESD Damage
- Issue : Component failure during handling or operation
- Solution : Follow ESD protection protocols and implement TVS diodes on high-speed lines
### Compatibility Issues
Serializer Compatibility:
- Must be paired with DS90C383A or DS90C384A serializers
- Incompatible with first-generation FPD-Link devices
Display Interface Compatibility:
- Direct interface to TFT-LCD timing controllers
- Requires level shifting for 1.8V/3.3V mixed signal systems
- I²C Compatibility : Standard I²C interface for control and configuration
Cable Compatibility:
- Optimized for 75Ω coaxial cables
- Supports twisted-pair cables with proper termination
- Maximum cable length: 10 meters (dependent on cable quality)
### PCB Layout Recommendations
Power Distribution:
- Use separate power planes for analog (3.3V) and digital (1.8V) supplies
- Implement star-point grounding near the device
- Place decoupling capacitors within 2mm of power pins
High-Speed Signal Routing:
- Maintain 100
