12G SDI cable driver with integrated reclocker
Product details
Parameters
Package | Pins | Size
Features
- Supports ST-2082 (Proposed), ST-2081 (Proposed), SMPTE 424M, 344M, 292M, 259M, DVB-ASI, SFF-8431 (SFP+) and 10GbE Ethernet for SMPTE 2022-5/6
- Locks to Rates 11.88 Gbps, 5.94 Gbps, 2.97 Gbps, 1.485 Gbps, or Divided by 1.001 Sub-Rates, DVB-ASI (270 Mbps) and 10GbE (10.3125 Gbps)
- Reference-Free Operation With Fast Lock Time Covering All Supported or Selected Data Rates
- 75-Ω and 100-Ω Transmitter Outputs
- Integrated 2:1 Mux Input, 1:2 Demux/Fanout Outputs
- Automatic Slew Rate Based on Input Rate Detect
- On-Chip Eye Monitor
- Low 300-mW Power Consumption With Automatic Power Down on Loss of Input Signal
- Programmable Through SPI or SMBus Interface
- Single 2.5-V Supply Operation
- Small 4-mm × 4-mm 24-Pin WQFN Package
- –40°C to +85°C Operating Temperature Range
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Description
The LMH1218 device is a low-power cable driver with integrated reclocker to drive serial video data compatible to SMPTE-SDI, SMPTE 2022-5/6, 10GbE Ethernet, and DVB-ASI standards. The LMH1218 supports up to 11.88 Gbps to enable Ultra High Definition Video for 4K/8K applications. With 75-Ω and 50-Ω transmitter outputs, the LMH1218 enables multiple media options such as coax, fiber, and FR-4 PCB.
The integrated 2-to-1 MUX on the input of the LMH1218 enables selection between two video sources, while the programmable equalizer compensates for the printed-circuit board loss to extend signal reach. With a wide range clock-and-data recovery (CDR) circuit, the on-chip reclocker automatically detects and locks to serial data from 270 Mbps to 11.88 Gbps without the need for an external reference clock and loop filter component, thereby simplifying board design and lowering system cost. The reclocked serial data can be routed to either the 75-Ω or 50-Ω transmitter output, or both simultaneously (1-to-2 fanout mode). The output voltage swing is compatible to SFF-8431 (SFP+), ST-2082/1 (Proposed), SMPTE 424M, 344M, 292M, and 259M standards.
A non-disruptive eye monitor allows for real-time measurement of serial data to simplify system start-up or field tuning. The LMH1218 can be programmed using SPI or SMBus Interface.
More Information
For more information on the LMH1218 programming guide and IBIS-AMI models. Request Now
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LMH1218 Low Power Ultra HD Cable Driver With Integrated Reclocker datasheet (Rev. E) | Jun. 12, 2018 |
Application note | LMH121x 12G SDI PCB Layout Guidelines | Feb. 19, 2020 | |
Application note | LMH12xx MADI Compatibility Application Note | Aug. 30, 2018 | |
User guide | LMH1218 Programming Guide (Rev. B) | Jun. 12, 2018 | |
Technical article | Three reasons why a bidirectional I/O will simplify your next 4K video design | Sep. 06, 2017 | |
Technical article | Three things to consider when upgrading to 4K Ultra HD 12G-SDI interfaces | Apr. 13, 2016 | |
Technical article | SigCon Architect: The keys to your high-speed design | Oct. 27, 2015 | |
Application note | SDI Video Bit Rate Calculation | Apr. 10, 2015 | |
User guide | LMH1218EVM User's Guide (Rev. A) | Mar. 24, 2015 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LMH1218EVM evaluation module provides a complete high bandwidth platform to evaluate the SDI/UHD and 10 GbE signal conditioning features of the Texas Instruments LMH1218 UHD Cable Driver with Integrated Reclocker. The LMH1218EVM can be used for standard compliance testing, performance (...)
Features
- Locks to standard SDI (2.97 Gbps, 1.485 Gbps, or divide-by-1.001 sub-rates), DVB-ASI (270 Mbps), ST-2081 (5.94 Gbps proposed), ST-2082 (11.88 Gbps proposed), and 10 GbE data rates
- Integrated 2:1 50 ⦠mux on input and 1:2 fan-out (one 75 ⦠and one 50 â¦) output drivers with de-emphasis supporting (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-00428 BOM.pdf (116KB) -
download TIDA-00428 Altium Design Package.zip (466KB) -
download TIDA-00428 Gerber.zip (349KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WQFN (RTW) | 24 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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