LMH1228 12G UHD-SDI Dual Cable Driver with Integrated Reclocker - LMH1228

LMH1228 (ACTIVE)

LMH1228 12G UHD-SDI Dual Cable Driver with Integrated Reclocker

 

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Description

LMH1228 device is a 12G UHD-SDI low power dual output cable driver with integrated reclocker. It supports SMPTE video rates up to 11.88 Gbps, enabling UHD video for 4K/8K applications. With a wide range clock-and-data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to all SMPTE video rates up to 11.88 Gbps. The additional reclocked 100-Ω driver output on the host-side can be used for monitoring or signal distribution purposes.

The on-chip reclocker attenuates high-frequency jitter and fully regenerates the data using a clean, low-jitter clock. The reclocker has a built-in loop filter and does not require any input reference clock. The LMH1228 also has an internal eye opening monitor and a programmable pin for CDR lock indication, input signal detect, or hardware interrupts to support system diagnostics and board bring-up.

The LMH1228 is powered from a single 2.5-V supply. It is offered in a small footprint 5 mm × 5 mm 32-pin WQFN package. The LMH1228 is pin compatible with the LMH1208 (12G Dual Cable Driver).

Features

  • Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-424 (3G), ST-292 (HD), and ST-259 (SD)
  • Compatible With DVB-ASI and AES10 (MADI)
  • Integrated Reclocker Locks to SMPTE Rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps or Divide-by-1.001 Sub-Rates and 270 Mbps
  • Integrated Eye Opening Monitor (EOM)
  • Dual Differential Output Cable Drivers
  • On-Chip 75-Ω Termination and Return Loss Compensation Network
  • Adaptive PCB Input Equalizer
  • Reclocked 100-Ω Loop-Back Output
  • Automatic Slew Rate Control on 75-Ω Outputs
  • Automatic 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 Absence of Input Signal
    • Power Consumption: 25 mW (Typical)
  • Power-Down Control Through ENABLE Pin
  • Single 2.5-V Supply
    • Power Consumption: 305 mW (Typical)
  • Programmable Through Pins, SPI, or SMBus Interface
  • –40°C to +85°C Operating Temperature Range
  • 5-mm × 5-mm, 32-pin WQFN Package

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Parametrics Compare all products in 

 
Supply Voltage (V)
Function
Max Data Rate (Mbps)
Pin/Package
Power Consumption (mW)
In / Out count
ESD HBM (kV)
Control Interface
LMH1228 LMH1208
2.5    2.5   
Cable Driver
Cable Driver with Reclocker   
Cable Driver   
11880    11880   
32WQFN    32WQFN   
315    255   
1/2    1/2   
6    6   
Pin
SMBus
SPI   
Pin
SMBus
SPI   

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