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LMH0397RTVR LMH0397RTVT 有现货 可添加我们联系方式获取最优惠价格
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描述
The LMH0397 is a 3G-SDI 75-Ω bidirectional I/O with integrated reclocker. This device can be configured either in input mode as an adaptive cable equalizer or in output mode as a dual cable driver, allowing system designers the flexibility to use a single BNC either as an input or output port to simplify HD-SDI video hardware designs. The integrated reclocker locks to all supported SMPTE data rates up to 2.97 Gbps in both modes. The bidirectional I/O has an on-chip 75-Ω termination and return loss compensation network that meets the stringent SMPTE return loss requirements.
An additional 75-Ω driver output allows the LMH0397 to support a variety of system functions. In EQ (Equalizer) Mode, this second 75-Ω driver can be used as a loop-through output. In CD (Cable Driver) Mode, this 75-Ω driver can be used as a second fan-out cable driver. The host-side 100-Ω driver can also be used as a loopback output in CD Mode for monitoring 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 LMH0397 also has an internal eye opening monitor and a programmable pin for CDR lock indication, input carrier detect, or hardware interrupts to support system diagnostics and board bring-up.
The LMH0397 is powered from a single 2.5-V supply. The device is offered in a small 5-mm × 5-mm, 32-pin WQFN package. The LMH0397 is also pin-compatible with theLMH1297.
特性
User-Configurable Adaptive Cable Equalizer or Cable Driver With Integrated Reclocker
Supports ST-424 (3G), ST-292 (HD), and ST-259 (SD)
Compatible With DVB-ASI and AES10 (MADI)
Integrated Reclocker Locks to SMPTE Rates of 2.97 Gbps, 1.485 Gbps, or Divide-by-1.001 Subrates and 270 Mbps
On-Chip 75-Ω Termination and Return Loss Compensation Network
EQ (Equalizer) Mode:
200 m at 2.97 Gbps
300 m at 1.485 Gbps
600 m at 270 Mbps
Adaptive Cable Equalizer With Integrated Reclocker
100-Ω Output Driver With De-Emphasis
Reclocked 75-Ω Loop-Through Output
EQ Mode Cable Reach
(Belden 1694A, SDI_OUT Disabled):CD (Cable Driver) Mode:
Dual Differential Output Cable Drivers With Integrated Reclocker
Adaptive PCB Input Equalizer
Reclocked 100-Ω Loopback Output
Automatic Pre-Emphasis and Slew Rate Control on 75-Ω Outputs
Polarity Inversion on 75-Ω and 100-Ω Outputs
Automatic Power Save in Absence of Input Signal
Power Dissipation: 25 mW (Typical)
Power-Down Control Through ENABLE Pin
Single 2.5-V Supply
EQ Mode: 275 mW (Typical)
CD Mode: 315 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
Pin Compatible with the LMH1297 for Easy Upgrade to 12G-SDI
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