TI LMH0397RTVR

The LMH0397 is a 3G SDI - SDI 75Ω bidirectional I/O with an integrated clock recovery unit. This device can be configured as an adaptive cable equalizer in input mode or as a dual - cable driver in output mode, allowing system designers to flexibly use a single BNC as an input or output port, thus simplifying HD - SDI video hardware design. The integrated clock recovery unit can lock onto all supported SMPTE data rates up to 2.97Gbps in both modes. This bidirectional I/O features on - chip 75Ω termination and return loss compensation networks, meeting strict SMPTE return loss requirements. An additional 75Ω driver output enables the LMH0397 to support various system functions. In EQ (equalizer) mode, this second 75Ω driver can be used as a loop - through output. In cable driver (CD) mode, this 75Ω driver can be used as a second fan - out cable driver. The host - side 100Ω driver can also be used as a loop - back output in CD mode for monitoring purposes. The on - chip clock recovery unit can reduce high - frequency jitter and fully regenerate data using a clean, low - jitter clock. This clock recovery unit has a built - in loop filter and does not require any input reference clock. The LMH0397 also has an internal eye - opening monitor and programmable pins for CDR lock indication, input carrier detection, or hardware interrupts, supporting system diagnostics and board startup. The LMH0397 operates from a single 2.5V power supply. This device comes in a small - sized 5mm × 5mm 32 - pin WQFN package. The LMH0397 is also pin - compatible with the LMH1297.

• User-configurable adaptive cable equalizer or cable driver with integrated clock recovery
• Supports ST-424 (3G), ST-292 (HD), and ST-259 (SD)
• Compatible with DVB-ASI and AES10 (MADI)
• Integrated clock recovery locks to SMPTE rates of 2.97Gbps, 1.485Gbps, or 1/1.001 sub-rates and 270Mbps
• On-chip 75Ω termination and return loss compensation network
• EQ mode: adaptive cable equalizer with integrated clock recovery, 100Ω output driver with de-emphasis, clock recovery 75Ω loop-through output
• EQ mode cable reach (Belden 1694A, SDI_OUT disabled): 200m at 2.97Gbps, 300m at 1.485Gbps, 600m at 270Mbps
• CD mode: dual differential output cable driver with integrated clock recovery, adaptive PCB input equalizer, clock recovery 100Ω loopback output
• Automatic pre-emphasis and slew rate control on 75Ω outputs
• Polarity inversion on 75Ω and 100Ω outputs; power-down control via ENABLE pin
• 2.5V single supply
• Power consumption: 275mW (typical) in EQ mode, 290mW (typical) in CD mode
• Programmable via pin, SPI, or SMBus interface
• Operating temperature range: -40°C to +85°C
• 5mm×5mm 32-pin WQFN package

• SMPTE-compatible Serial Digital Interface (SDI)
• Broadcast video routers, switches, distribution amplifiers, and monitors
• IP media gateways
• Digital video processing and editing