LMH1228 Texas instruments

LMH1228

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LMH1228

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Описание

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).

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

Function	Cable driver, Cable driver with reclocker
Supply voltage (V)	2.5
Power consumption (mW)	315
Data rate (max) (MBits)	11880
Control interface	Pin, SMBus, SPI
Operating temperature range (°C)	-40 to 85