M21528 Datasheet, PDF (1/2 Pages) M/A-COM Technology Solutions, Inc. – 3G/HD/SD-SDI Low Power Dual Cable Driver

M21528 3G/HD/SD-SDI Low Power Dual Cable Driver
> Product Overview
The M21528 is a very low power, highly integrated, dual cable driver for SMPTE compliant digital video applications. It can
drive 2 pairs of 75Ω coaxial cables, or 50Ω equivalent loads, at SDI data rates from 143 Mbps to 2.97 Gbps. The device is
capable of outputting SDI signals with jitter of 12 ps peak to peak, when operating at 2.97 Gbps.
The dual cable driver includes a 2x2 input crosspoint and integrated input and output termination resistors. The M21528,
with input equalization for up to 36” of FR4 trace in addition to two connectors and exceptional Output Return Loss
(ORL), is ideal for, high speed, 3G-SDI, designs.
The device features integrated supply regulators, allowing it to be powered from 1.8V, 2.5V, or 3.3V supply voltages.
When operating at 1.8V, it consumes only 40mW per channel at 2.97Gbps. Furthermore, the power rails for the input and
output circuitry are electrically isolated on-chip and as such may be connected to different voltage rails on the board.
This feature enables the M21528 to be DC coupled to any upstream device in the 1.2V to 3.3V range.
The integrated 2x2 crosspoint allows for either input to be routed to either output, eliminating the need for an external
multiplexer. Additionally, one input may be routed to both outputs. The cable driver also provides cable detect and Loss
of Signal (LOS) functionality. It can be configured to automatically power down at cable disconnect or loss of input
signal.
The M21528 is offered in a green and RoHS compliant, 4mm x 4mm, 24 pin QFN package.
Features
>> Independent, dual channel, multi-rate cable driver
Benefits
Save board area and enable high density designs
>> SMPTE 424M, 292M, and 259M compliant
Standard compliant solution
>> Exceptional output return loss with no matching network
Save board area and enable high density designs
>> Typical output jitter of 12ps pk–pk at 2.97 Gbps
Enable robust, high speed, SDI design
>> Integrated, selectable, 75Ω or 50Ω output termination
Save board area and enable high density designs
>> Integrated 50Ω input termination
Save board area and enable high density designs
>> Very low power design; 40 mW/channel @1.8V
Enable low power designs with minimal heat dissipation
>> Input equalization 36” of FR4 trace + 2 connectors
Ease of high speed design and layout
>> Selectable slew rate for SD and 3G/HD operation
Standard compliant solution
>> Integrated 2x2 crosspoint switch
Save board area and enable high density designs
>> Integrated regulators for multi-voltage operation (1.8V – 3.3V) Reduce number of power rails required on a board
>> Universal DC coupling at the input (1.2V – 3.3V)
Reduce the number of external components required
>> Cable detect with automatic power down and power up upon Reduced power consumption
cable disconnect and re-connect
>> Loss of input signal detection with automatic power down and Reduced power consumption
power up upon cable disconnect and re-connect
>> Industrial operating temperature range ( -40°C to +85°C)
Provides higher tolerance and additional design margin
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