Overview
The LMH0302SQE/NOPB is a high-performance, 3-Gbps HD/SD SDI cable driver designed by Texas Instruments. This monolithic device is optimized for use in serial digital video data transmission applications, supporting various SMPTE standards including ST 424, ST 292, ST 344, and ST 259. The LMH0302 drives 75-Ω transmission lines at data rates up to 2.97 Gbps, making it suitable for a wide range of digital video applications. It operates from a single 3.3-V supply and is available in a 16-pin WQFN package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Data Rates | Up to 2.97 Gbps | Gbps |
| DVB-ASI Support | 270 Mbps | Mbps |
| Differential Input Impedance | 100 Ω | Ω |
| Single-Ended Output Impedance | 75 Ω | Ω |
| Output Voltage Swing | Adjustable via RREF resistor | mVp-p |
| Output Rise/Fall Time | 90-130 ps (ST 424/292), 400-800 ps (ST 259) | ps |
| Power Supply | Single 3.3 V | V |
| Power Consumption | Typically 125 mW (SD mode), 165 mW (HD mode) | mW |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | 16-pin WQFN |
Key Features
- Supports ST 424 (3G), ST 292 (HD), ST 259 (SD), and ST 344 serial digital interfaces.
- Selectable slew rates for compliance with different SMPTE standards.
- Output driver power-down control through the ENABLE pin.
- Adjustable output voltage swing using an external RREF resistor.
- Self-biased inputs allowing for simple AC or DC coupling.
- Current mode outputs with single-ended output levels of 800 mVp-p into 75-Ω AC-coupled coaxial cable.
- Industrial temperature range: -40°C to 85°C.
Applications
- ST 424, ST 292, ST 344, and ST 259 serial digital video applications.
- Digital video routers and switches.
- Distribution amplifiers.
- Any system requiring high-speed serial digital video data transmission over coaxial cables.
Q & A
- What are the supported data rates for the LMH0302?
The LMH0302 supports data rates up to 2.97 Gbps and also supports DVB-ASI at 270 Mbps.
- What is the input impedance of the LMH0302?
The differential input impedance is 100 Ω.
- What is the output impedance of the LMH0302?
The single-ended output impedance is 75 Ω.
- How is the output voltage swing adjusted?
The output voltage swing is adjustable via an external RREF resistor connected to VCC.
- What are the selectable slew rates for the LMH0302?
The LMH0302 has selectable slew rates for compliance with ST 259, ST 424, and ST 292 standards.
- How is the output driver powered down?
The output driver can be powered down through the ENABLE pin, which has an internal pullup.
- What is the power supply requirement for the LMH0302?
The LMH0302 operates from a single 3.3-V supply.
- What is the typical power consumption of the LMH0302?
Typically 125 mW in SD mode and 165 mW in HD mode.
- What is the operating temperature range of the LMH0302?
The operating temperature range is -40°C to 85°C.
- In what package is the LMH0302 available?
The LMH0302 is available in a 16-pin WQFN package.
