Overview
The LMH0384SQE/NOPB, produced by Texas Instruments, is a 3-Gbps HD-SD SDI Extended Reach and Configurable Adaptive Cable Equalizer. This device is designed to equalize data transmitted over cables, supporting a wide range of data rates from 125 Mbps to 2.97 Gbps. It complies with various SMPTE standards including ST 424, ST 292, ST 344, and ST 259, as well as DVB-ASI at 270 Mbps. The LMH0384 features advanced functionalities such as active sensing, DC restoration, and programmable output common-mode voltage and swing, making it a versatile component for high-speed data transmission applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps | |
| Cable Equalization | Up to 140 meters at 2.97 Gbps, up to 200 meters at 1.485 Gbps, up to 400 meters at 270 Mbps | |
| Input Return Loss | 15 dB (1.5 GHz to 3.0 GHz) | |
| Input Resistance | 1.3 kΩ (single-ended) | |
| Input Capacitance | 0.7 pF (single-ended) | |
| Power Supply | Single 3.3 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | WQFN (RUM) with 16 pins |
Key Features
- Compliant with ST 424, ST 292, ST 344, and ST 259 standards
- Supports DVB-ASI at 270 Mbps
- Wide range of data rates from 125 Mbps to 2.97 Gbps
- Equalizes up to 140 meters of Belden 1694A cable at 2.97 Gbps
- Active sensing features and design enhancements for longer cable equalization and lower output jitter
- Configurable pin mode and SPI modes
- Power-saving sleep mode with auto sleep control
- Programmable output common-mode voltage and swing
- DC restoration to handle pathological data conditions
- Manual bypass and output mute with programmable threshold
- Cable length indicator in SPI mode
- Launch amplitude optimization in SPI mode
Applications
The LMH0384 is primarily used in high-speed data transmission applications, particularly in the broadcast and professional video industries. It is suitable for serial digital data equalization and reception in systems that require reliable transmission over long cable lengths. Key applications include:
- High-definition (HD) and standard-definition (SD) serial digital interface (SDI) systems
- Professional video equipment
- Broadcasting and video production
- Long-haul video transmission systems
Q & A
- What are the supported data rates for the LMH0384?
The LMH0384 supports data rates from 125 Mbps to 2.97 Gbps. - Which SMPTE standards does the LMH0384 comply with?
The LMH0384 complies with ST 424, ST 292, ST 344, and ST 259 standards. - What is the maximum cable length that the LMH0384 can equalize?
The LMH0384 can equalize up to 140 meters of Belden 1694A cable at 2.97 Gbps, up to 200 meters at 1.485 Gbps, and up to 400 meters at 270 Mbps. - Does the LMH0384 support SPI mode?
Yes, the LMH0384 supports both pin mode and SPI mode, with SPI mode providing register access to all features. - What is the power consumption in power save mode?
The typical power consumption in power save mode is 35 mW. - How does the auto sleep mode work?
The auto sleep mode allows the LMH0384 to power down when no input signal is detected, and it powers on again once an input signal is detected. - Can the output common-mode voltage and swing be adjusted?
Yes, the output common-mode voltage and swing can be adjusted through SPI register settings. - What is the purpose of the DC restoration feature?
The DC restoration feature is used to correctly handle pathological data conditions. - Is the LMH0384 footprint compatible with other SDI equalizers?
Yes, in pin mode, the LMH0384 is footprint compatible with the LMH0344, LMH0044, and LMH0074. - What is the operating temperature range of the LMH0384?
The operating temperature range of the LMH0384 is -40°C to +85°C.
