Overview
The LMH1228RTVT, produced by Texas Instruments, is a 12G UHD-SDI dual output cable driver with an integrated reclocker. This device is designed to support SMPTE video rates up to 11.88 Gbps, making it suitable for UHD video applications such as 4K and 8K. It features automatic edge rate adjustment and meets SMPTE rise and fall time requirements. The LMH1228RTVT operates from a single 2.5-V supply and is packaged in a 5-mm × 5-mm, 32-pin WQFN package, offering a compact solution for high-speed video transmission.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supported SMPTE Rates | 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps, 270 Mbps | - |
| Output Drivers | Dual differential 75-Ω output drivers | - |
| Reclocker | Integrated reclocker with automatic detection and lock to SMPTE rates | - |
| Supply Voltage | 2.5-V ± 5% | V |
| Power Consumption (Typical) | 305 mW (with both outputs enabled) | mW |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Type | 32-pin WQFN (5 mm × 5 mm) | - |
| Thermal Resistance (Junction-to-Ambient) | 32.5 °C/W | °C/W |
Key Features
- Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-424 (3G), ST-292 (HD), and ST-259 (SD) standards.
- Compatible with DVB-ASI and AES10 (MADI).
- Integrated Eye Opening Monitor (EOM) and adaptive PCB input equalizer.
- Reclocked 100-Ω loop-back output for monitoring or signal distribution.
- Automatic slew rate control, pre-emphasis, and output amplitude on 75-Ω outputs.
- Programmable de-emphasis and output amplitude on 100-Ω output.
- Polarity inversion on 75-Ω and 100-Ω outputs.
- Automatic power save in the absence of an input signal.
- Programmable through pins, SPI, or SMBus interface.
Applications
- SMPTE compatible serial digital interface.
- UHDTV/4K/8K/HDTV/SDTV video transmission.
- Broadcast video routers, switchers, distribution amplifiers, and monitors.
- Digital video processing and editing.
Q & A
- What are the supported SMPTE rates for the LMH1228RTVT?
The LMH1228RTVT supports SMPTE rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps, and 270 Mbps. - What is the operating supply voltage for the LMH1228RTVT?
The operating supply voltage is 2.5-V ± 5%. - What is the typical power consumption of the LMH1228RTVT?
The typical power consumption is 305 mW with both outputs enabled. - What is the operating temperature range of the LMH1228RTVT?
The operating temperature range is -40°C to +85°C. - What package type is the LMH1228RTVT available in?
The LMH1228RTVT is available in a 32-pin WQFN package (5 mm × 5 mm). - Does the LMH1228RTVT have an integrated reclocker?
Yes, it has an integrated reclocker that automatically detects and locks to SMPTE video rates. - What additional features does the LMH1228RTVT have for signal integrity?
The device features an integrated Eye Opening Monitor (EOM), adaptive PCB input equalizer, and automatic slew rate control. - How can the LMH1228RTVT be programmed?
The LMH1228RTVT can be programmed through pins, SPI, or SMBus interface. - What are some common applications of the LMH1228RTVT?
Common applications include SMPTE compatible serial digital interfaces, UHDTV/4K/8K/HDTV/SDTV video transmission, broadcast video routers, switchers, distribution amplifiers, and monitors. - Does the LMH1228RTVT support power-saving modes?
Yes, it has an automatic power save mode in the absence of an input signal.
