Overview
The DS90UB928Q-Q1 deserializer, produced by Texas Instruments, is a critical component in automotive infotainment systems. It works in conjunction with the DS90UB925Q-Q1 or DS90UB927Q-Q1 serializer to distribute digital video and audio signals. This device converts a high-speed serialized interface with an embedded clock, delivered over a single signal pair (FPD-Link III), into four LVDS data/control streams, one LVDS clock pair (OpenLDI), and I2S audio data. This consolidation of audio, video, and control data over a single differential pair reduces interconnect size and weight, eliminates skew issues, and simplifies system design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | WQFN (RHS) | - |
| Pins | 48 | - |
| Operating Temperature Range | -40 to 105 | °C |
| Supply Voltage (VDD33) | 3 to 3.6 | V |
| Supply Voltage (VDDIO) | 1.71 to 3.6 | V |
| Pixel Clock Frequency | 5 to 85 | MHz |
| Junction Temperature | -150 to 150 | °C |
| ESD Ratings (HBM) | ±8 kV | - |
| ESD Ratings (CDM) | ±1250 V | - |
Key Features
- Qualified for Automotive Applications AEC-Q100
- Device Temperature Grade 2: -40°C to +105°C Ambient Operating Temperature Range
- Bidirectional Control Channel Interface with I2C Compatible Serial Control Bus
- Low EMI FPD-Link Video Output
- Supports High Definition (720p) Digital Video
- RGB888 + VS, HS, DE and I2S Audio Supported
- Up to 4 I2S Digital Audio Outputs for Surround Sound Applications
- 4 Bidirectional GPIO Channels with 2 Dedicated Pins
- Single 3.3 V supply with 1.8 V or 3.3 V Compatible LVCMOS I/O Interface
- AC-Coupled STP Interconnect Up to 10 Meters
- DC-Balanced and Scrambled Data with Embedded Clock
- Adaptive Cable Equalization
- Image Enhancement (White Balance & Dithering) and Internal Pattern Generation
- Backward Compatible Modes
Applications
- Automotive Displays for Navigation
- Rear Seat Entertainment Systems
- Automotive Driver Assistance
- Automotive Megapixel Camera Systems
Q & A
- What is the primary function of the DS90UB928Q-Q1 deserializer?
The DS90UB928Q-Q1 deserializer converts a high-speed serialized interface with an embedded clock into four LVDS data/control streams, one LVDS clock pair, and I2S audio data for use in automotive infotainment systems.
- What are the operating temperature ranges for the DS90UB928Q-Q1?
The device operates within a temperature range of -40°C to +105°C.
- What types of video and audio signals does the DS90UB928Q-Q1 support?
The device supports High Definition (720p) digital video and RGB888 + VS, HS, DE and I2S audio signals.
- How many I2S digital audio outputs does the DS90UB928Q-Q1 support?
The device supports up to 4 I2S digital audio outputs for surround sound applications.
- What is the maximum length of the AC-Coupled STP interconnect supported by the DS90UB928Q-Q1?
The device supports AC-Coupled STP interconnects up to 10 meters.
- What are the ESD ratings for the DS90UB928Q-Q1?
The device has ESD ratings of ±8 kV for Human Body Model (HBM) and ±1250 V for Charged Device Model (CDM).
- What is the purpose of adaptive cable equalization in the DS90UB928Q-Q1?
Adaptive cable equalization compensates for transmission medium losses and deterministic jitter, ensuring reliable data transmission.
- Does the DS90UB928Q-Q1 support backward compatibility?
Yes, the device supports backward compatible modes.
- What are some common applications of the DS90UB928Q-Q1?
The device is commonly used in automotive displays for navigation, rear seat entertainment systems, automotive driver assistance, and automotive megapixel camera systems.
- What is the recommended power supply voltage for the DS90UB928Q-Q1?
The recommended supply voltage is 3.3 V for VDD33 and either 1.8 V or 3.3 V for VDDIO.
- How many GPIO channels does the DS90UB928Q-Q1 have?
The device has 4 bidirectional GPIO channels with 2 dedicated pins.
