Overview
The DS90CR285MTDX from Texas Instruments is a +3.3V Rising Edge Data Strobe LVDS 28-Bit Channel Link Transmitter. This device is designed to convert 28 bits of LVCMOS/LVTTL data into four LVDS (Low Voltage Differential Signaling) data streams, along with a phase-locked transmit clock transmitted over a fifth LVDS link. This chipset is part of a high-speed data transmission solution, offering significant reductions in cable size and system cost while maintaining high data throughput and reliability.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 | 3.6 | V |
| Operating Free Air Temperature (TA) | -40 | +25 | +85 | °C |
| Data Rate | 1.848 | Gbps | ||
| Bandwidth | 231 | Megabytes/sec | ||
| Power Consumption | <250 | mW | ||
| Power-Down Mode | <0.5 | mW | ||
| Junction Temperature | 150 | °C | ||
| Package Type | 56-TFSOP |
Key Features
- Single +3.3V supply for LVCMOS/LVTTL inputs and LVDS outputs.
- Converts 28 bits of LVCMOS/LVTTL data into four LVDS data streams and one LVDS clock stream.
- Up to 1.848 Gbps data throughput and 231 Megabytes/sec bandwidth.
- Low power consumption: <250 mW typical, and <0.5 mW in power-down mode.
- Narrow bus reduces cable size, providing system cost savings and reduced shielding requirements.
- Supports a variety of signal combinations, such as seven 4-bit nibbles or three 9-bit (byte + parity) and one control bit.
- Phase-locked transmit clock ensures synchronized data transmission.
Applications
The DS90CR285MTDX is designed for a wide range of high-speed data transmission applications. These include point-to-point connections in various industries such as automotive, industrial, and medical devices. The device is particularly useful in scenarios where high data rates and low power consumption are critical. It supports various cable types like flat ribbon, flex, twisted pair, and Twin-Coax, making it versatile for different application environments.
Key application considerations include ensuring constant differential impedance in the cable/connector interface, maintaining low cable skew, and providing a common ground return path between the transmitter and receiver to minimize noise and ensure reliable data transmission.
Q & A
- What is the primary function of the DS90CR285MTDX?
The primary function is to convert 28 bits of LVCMOS/LVTTL data into four LVDS data streams and one LVDS clock stream. - What is the maximum data throughput of the DS90CR285MTDX?
The maximum data throughput is 1.848 Gbps. - What is the typical power consumption of the DS90CR285MTDX?
The typical power consumption is less than 250 mW. - How does the DS90CR285MTDX reduce system costs?
It reduces system costs by narrowing the bus, which decreases cable size and reduces the need for shielding and connectors. - What types of cables are recommended for use with the DS90CR285MTDX?
Recommended cable types include flat ribbon, flex, twisted pair, and Twin-Coax. - What is the significance of maintaining low cable skew in the application?
Maintaining low cable skew is crucial to ensure a sufficient data sampling window at the receiver and to prevent data errors. - How does the DS90CR285MTDX handle power-down mode?
The device can be placed into power-down mode by asserting the Powerdown pin (active low), reducing total power dissipation to less than 0.5 mW. - What are the recommended operating temperatures for the DS90CR285MTDX?
The recommended operating temperatures range from -40°C to +85°C. - What is the maximum junction temperature for the DS90CR285MTDX?
The maximum junction temperature is 150°C. - How does the DS90CR285MTDX protect against electrostatic damage?
The device has limited built-in ESD protection; therefore, it is recommended to short the leads together or place the device in conductive foam during storage or handling.
