Overview
The LMH0394SQE/NOPB, produced by Texas Instruments, is a 3-Gbps HD/SD SDI Low Power Extended Reach Adaptive Cable Equalizer. This device 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 features ultra-low power consumption, enhanced immunity to crosstalk, and active sensing circuitry to ensure robust performance and immunity to variations in the input signal launch amplitude.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC - VEE) | 2.375 | 2.5 | 2.625 | V |
| Operating Free-Air Temperature (TA) | -40 | 25 | 85 | °C |
| Input Data Rate | 125 Mbps | - | 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 | - | - |
| Package Type | - | - | 16-pin WQFN | - |
| Package Size | - | - | 4.00 mm × 4.00 mm | - |
Key Features
- Ultra-low power consumption: 115 mW in normal operation and 17 mW in power-save mode.
- Extended cable reach with improved immunity to crosstalk.
- Active sensing circuitry for robust performance and enhanced immunity to variations in the input signal launch amplitude.
- Programmable output common-mode voltage and swing.
- Programmable de-emphasis for up to 40 inches of FR4 trace losses.
- Optional SPI serial interface for configuring multiple devices in a daisy-chain configuration.
- DC restoration to correctly handle pathological data conditions.
- Single 2.5-V supply operation.
- Industrial temperature range: -40°C to +85°C.
- Footprint compatible with the LMH0384, LMH0344, and legacy SDI equalizers.
Applications
The LMH0394SQE/NOPB is suitable for various applications requiring high-speed data transmission over long cables, including:
- Broadcast and professional video equipment.
- High-definition video transmission systems.
- Medical imaging and diagnostic equipment.
- Industrial video surveillance systems.
- Any system requiring extended reach and low power consumption for SDI signals.
Q & A
- What is the primary function of the LMH0394SQE/NOPB?
The primary function is to equalize data transmitted over cable or any media with similar dispersive loss characteristics, supporting HD/SD SDI signals up to 3 Gbps.
- What are the supported data rates for the LMH0394SQE/NOPB?
The device supports data rates from 125 Mbps to 2.97 Gbps.
- What standards does the LMH0394SQE/NOPB comply with?
It complies with ST 424, ST 292, ST 344, ST 259, and DVB-ASI standards.
- What is the typical power consumption of the LMH0394SQE/NOPB?
The typical power consumption is 115 mW in normal operation and 17 mW in power-save mode.
- What is the maximum equalized cable length supported by the LMH0394SQE/NOPB?
The device can equalize up to 200 meters of Belden 1694A cable at 2.97 Gbps, 220 meters at 1.485 Gbps, and 400 meters at 270 Mbps.
- Does the LMH0394SQE/NOPB support SPI interface?
Yes, it supports an optional SPI serial interface for configuring multiple devices in a daisy-chain configuration.
- What is the operating temperature range of the LMH0394SQE/NOPB?
The operating temperature range is -40°C to +85°C.
- What package type is the LMH0394SQE/NOPB available in?
The device is available in a 16-pin WQFN package.
- Is the LMH0394SQE/NOPB footprint compatible with other SDI equalizers?
Yes, it is footprint compatible with the LMH0384, LMH0344, and legacy SDI equalizers.
- What is the purpose of the DC restoration feature in the LMH0394SQE/NOPB?
The DC restoration feature is designed to correctly handle pathological data conditions.
