Overview
The LMH0394SQ/NOPB from Texas Instruments is a 3G HD/SD SDI Low Power Extended Reach Adaptive Cable Equalizer. This component is designed to equalize data transmitted over cable or any media with similar dispersive loss characteristics. It operates over a wide range of data rates from 125 Mbps to 2.97 Gbps and supports various standards including ST 424, ST 292, ST 344, ST 259, and DVB-ASI. The LMH0394 provides extended cable reach with improved immunity to crosstalk and ultra-low power consumption, making it an efficient solution for broadcast video applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Data Rates | 125 Mbps to 2.97 Gbps | |
| Equalized Cable Lengths (Belden 1694A) | 200 meters at 2.97 Gbps, 220 meters at 1.485 Gbps, 400 meters at 270 Mbps | |
| Power Consumption (Normal Operation) | 115 mW | |
| Power Consumption (Power-Save Mode) | 17 mW | |
| Supply Voltage | 2.375 V to 2.625 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 16-pin WQFN (RUM) | |
| Output Type | Internally Terminated 100-Ω LVDS Outputs |
Key Features
- Supports ST 424, ST 292, ST 344, ST 259, and DVB-ASI standards
- Extended cable reach with improved immunity to crosstalk
- Ultra-low power consumption with power-save mode and auto sleep control
- Programmable output common-mode voltage and swing
- Output de-emphasis to compensate for FR4 board trace losses
- Digital and analog programmable MUTE REF threshold
- Optional SPI register access for configuration in daisy-chain setup
- Cable length indicator
- Single 2.5-V supply operation
- Footprint compatible with LMH0384, LMH0344, and legacy SDI equalizers
Applications
- Broadcast video routers, switchers, and distribution amplifiers
- Professional video equipment requiring long cable runs
- High-definition and standard-definition video transmission systems
- Systems compliant with SMPTE standards (ST 424, ST 292, ST 344, ST 259)
Q & A
- What is the primary function of the LMH0394?
The LMH0394 is a 3G HD/SD SDI Low Power Extended Reach Adaptive Cable Equalizer designed to equalize data transmitted over cable or similar media.
- What data rates does the LMH0394 support?
The LMH0394 supports data rates from 125 Mbps to 2.97 Gbps.
- What are the equalized cable lengths for the LMH0394?
The LMH0394 can equalize cable lengths of up to 200 meters at 2.97 Gbps, 220 meters at 1.485 Gbps, and 400 meters at 270 Mbps using Belden 1694A cable.
- How does the LMH0394 manage power consumption?
The LMH0394 features ultra-low power consumption with 115 mW in normal operation and 17 mW in power-save mode, along with auto sleep control when no input signal is present.
- What output configurations are available on the LMH0394?
The LMH0394 has internally terminated 100-Ω LVDS outputs with programmable output common-mode voltage and swing.
- Can the LMH0394 be configured via SPI?
- What is the operating temperature range of the LMH0394?
The operating temperature range is -40°C to +85°C.
- What package type is the LMH0394 available in?
The LMH0394 is available in a 16-pin WQFN (RUM) package.
- Is the LMH0394 footprint compatible with other SDI equalizers?
- What standards does the LMH0394 support?
The LMH0394 supports ST 424, ST 292, ST 344, ST 259, and DVB-ASI standards.
