描述 LMH1228 device is a 12G UHD-SDI low power dual output cable driver with integratedreclocker. It supports SMPTE video rates up to 11.88 Gbps, enabling UHD video for 4K/8Kapplications. With a wide range clock-and-data recovery (CDR) circuit, the on-chip reclockerautomatically detects and locks to all SMPTE video rates up to 11.88 Gbps. The additional reclocked100-Ω driver output on the host-side can be used for monitoring or signal distributionpurposes.The on-chip reclocker attenuates high-frequency jitter and fully regenerates the datausing a clean, low-jitter clock. The reclocker has a built-in loop filter and does not require anyinput reference clock. The LMH1228 also has an internal eye opening monitor and a programmable pinfor CDR lock indication, input signal detect, or hardware interrupts to support system diagnosticsand board bring-up.The LMH1228 is powered from a single 2.5-V supply. It is offered in a small footprint 5mm × 5 mm 32-pin WQFN package. The LMH1228 is pin compatible with the LMH1208 (12G Dual CableDriver).特性 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) IntegratedReclocker Locks to SMPTE Rates of 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps or Divide-by-1.001Sub-Rates and 270 Mbps Integrated Eye Opening Monitor(EOM)Dual Differential Output CableDrivers On-Chip 75-Ω Termination and Return Loss Compensation NetworkAdaptive PCB Input EqualizerReclocked 100-Ω Loop-Back OutputAutomatic Slew Rate Control on 75-Ω Outputs Automatic Pre-Emphasis and Output Amplitude on 75-ΩOutputsProgrammable De-Emphasis and Output Amplitude on100-Ω Output Polarity Inversion on 75-Ω and 100-Ω OutputsAutomatic Power Save in Absence of Input SignalPower Consumption: 25 mW (Typical)Power-Down Control Through ENABLEPin Single 2.5-V Supply Power Consumption: 305 mW (Typical)Programmable Through Pins, SPI, or SMBusInterface–40°C to +85°C Operating TemperatureRange5-mm × 5-mm, 32-pin WQFNPackageAll trademarks are the property of their respective owners.