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LMH1228

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12G UHD-SDI dual cable driver with integrated reclocker

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Data sheet

LMH1228

ACTIVE
Data sheet Order now

Product details

Function Cable driver, Cable driver with reclocker Power consumption (mW) 315 Data rate (max) (Mbps) 11880 Control interface Pin, SMBus, SPI Operating temperature range (°C) -40 to 85
Function Cable driver, Cable driver with reclocker Power consumption (mW) 315 Data rate (max) (Mbps) 11880 Control interface Pin, SMBus, SPI Operating temperature range (°C) -40 to 85
WQFN (RTV) 32 25 mm² (5 mm × 5 mm)
  • 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
  • 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

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).

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).
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LMH1228 12G UHD-SDI Dual Output Cable Driver With Integrated Reclocker datasheet (Rev. D) PDF | HTML May 12, 2020
Application note LMH121x 12G SDI PCB Layout Guidelines Feb 19, 2020
Application note Simplifying 4K SDI Video Design with a Bidrectional I/O Oct 31, 2017
Technical article Three reasons why a bidirectional I/O will simplify your next 4K video design PDF | HTML Sep 6, 2017

Design & development

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Evaluation board

LMH1297EVM — LMH1297 12-G bidirectional I/O evaluation module

The LMH1297EVM is an evaluation module (EVM) designed for high-speed performance and functional evaluation of the Texas Instruments LMH1297 12-G UHD-SDI bidirectional I/O with integrated reclocker. With this kit, you can quickly evaluate the cable reach and output signal integrity supported (...)
User guide: PDF
Supported products & hardware
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WQFN (RTV) 32 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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