Overview
The LMH0387SL/NOPB, produced by Texas Instruments, is a 3 Gbps HD/SD SDI Configurable I/O Adaptive Cable Equalizer / Cable Driver. This device provides a single chip interface to a BNC, allowing it to be configured either as an input mode equalizer to receive data over coaxial cable or as an output mode cable driver to transmit data. The same I/O pin is used for both input and output functions, offering system designers the flexibility to use a BNC attached to the device as either an input or an output.
The LMH0387 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 at 270 Mbps. The integrated return loss network eliminates the need for external components, simplifying board design and reducing development time.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TLGA (NPD) | - |
| Pins | 48 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Data Rates | 125 Mbps to 2.97 Gbps | - |
| Cable Equalization | Up to 120 meters at 2.97 Gbps, up to 200 meters at 1.485 Gbps, up to 400 meters at 270 Mbps | - |
| Supply Voltage | 3.3 V | V |
| Package Size | 7 mm × 7 mm | - |
Key Features
- ST 424, ST 292, ST 344, and ST 259 compliant
- Supports DVB-ASI at 270 Mbps
- Integrated Return Loss Network (no external components required)
- Power Saving Modes
- Cable Driver Selectable Slew Rate
- Internally Terminated 100-Ω LVDS Receiver Outputs with Programmable Common Mode Voltage and Swing
- Programmable Launch Amplitude Optimization for Receiver
- Cable Length Indication
- Single 3.3-V Supply Operation
- 48-Pin Laminate TLGA Package
- Industrial Temperature Range: -40°C to 85°C
Applications
- Digital Video Servers and Modular Equipment
- ST 424 (SMPTE 424M), ST 292 (SMPTE 292M), and ST 259 (SMPTE 259M) Serial Digital Interfaces
- Broadcast and Professional Video Equipment
- Medical Imaging and Diagnostic Equipment
- High-Speed Data Transmission Systems
Q & A
- What is the primary function of the LMH0387?
The LMH0387 is a 3 Gbps HD/SD SDI Configurable I/O Adaptive Cable Equalizer / Cable Driver, capable of operating as either an input mode equalizer or an output mode cable driver.
- What data rates does the LMH0387 support?
The LMH0387 supports data rates from 125 Mbps to 2.97 Gbps.
- Which standards is the LMH0387 compliant with?
The LMH0387 is compliant with ST 424, ST 292, ST 344, ST 259, and DVB-ASI at 270 Mbps.
- What is the operating temperature range of the LMH0387?
The operating temperature range is -40°C to 85°C.
- Does the LMH0387 require external components for the return loss network?
No, the return loss network is integrated within the device, eliminating the need for external components.
- What is the package type and size of the LMH0387?
The LMH0387 is available in a 48-pin laminate Thin Laminate Grid Array (TLGA) package, measuring 7 mm × 7 mm.
- How does the LMH0387 indicate cable length?
The LMH0387 features cable length indication, which helps in monitoring the cable length during operation.
- What power saving features does the LMH0387 have?
The LMH0387 includes power-saving modes, such as a sleep mode, to reduce power consumption.
- Can the output slew rate of the LMH0387 be adjusted?
Yes, the LMH0387 has a cable driver with selectable slew rates for compliance with different standards.
- How is the output voltage swing of the BNC_IO pin controlled?
The output voltage swing of the BNC_IO pin can be controlled by connecting a resistor (nominally 715 Ω) to VCC.
