Overview
The LMH0395SQ/NOPB from Texas Instruments is a 3G HD/SD SDI Dual Output Low Power Extended Reach Adaptive Cable Equalizer. This device is designed to equalize data transmitted over cable or any media with similar dispersive loss characteristics, supporting a wide range of data rates from 125 Mbps to 2.97 Gbps. It is particularly suited for applications requiring extended cable reach with improved immunity to crosstalk and ultra-low power consumption.
The LMH0395SQ/NOPB operates on a single 2.5-V supply and is packaged in a 24-pin WQFN package, making it suitable for industrial temperature ranges from −40°C to +85°C. The device includes active sensing circuitry for robust performance and enhanced immunity to variations in the input signal launch amplitude.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC - VEE) | 2.375 | 2.5 | 2.625 | V |
| Operating Free-Air Temperature (TA) | -40 | 25 | +85 | °C |
| Input Data Rates | 125 Mbps | - | 2.97 Gbps | - |
| Differential Output Voltage (VSSP-P) | 500 | 700 | 900 | mVp-p |
| Supply Current (Normal Operation, Dual Outputs) | 55 | 78 | - | mA |
| Supply Current (Power-Save Mode) | 7 | 10 | - | mA |
| Junction-to-Ambient Thermal Resistance (RθJA) | - | - | 40 | °C/W |
Key Features
- Supports ST 424, ST 292, ST 344, ST 259, and DVB-ASI standards
- Extended cable reach with improved immunity to crosstalk
- Ultra-low power consumption with power management features
- Internally terminated 100-Ω LVDS outputs with programmable output common-mode voltage and swing
- Programmable de-emphasis to compensate for FR4 board trace losses
- Optional SPI register access and pin mode operation
- Digital and analog programmable MUTEREF threshold
- Cable length indicator and active sensing circuitry
- Single 2.5-V supply operation and industrial temperature range
Applications
- Broadcast video routers, switchers, and distribution amplifiers
- Serial digital interfaces (SDI) for HD and SD video transmission
- Professional video equipment requiring extended cable reach and low power consumption
Q & A
- What is the operating temperature range of the LMH0395SQ/NOPB?
The LMH0395SQ/NOPB operates over an industrial temperature range from −40°C to +85°C.
- What are the supported data rates for the LMH0395SQ/NOPB?
The device supports data rates from 125 Mbps to 2.97 Gbps.
- What is the typical power consumption of the LMH0395SQ/NOPB in normal operation with dual outputs?
The typical power consumption is 78 mA.
- Does the LMH0395SQ/NOPB support SPI interface?
- What is the purpose of the MUTEREF pin on the LMH0395SQ/NOPB?
The MUTEREF pin sets the threshold for carrier detect and determines the maximum cable length before muting.
- How many differential serial data outputs does the LMH0395SQ/NOPB have?
The device has two differential serial data outputs (SDO0 and SDO1).
- What is the package type of the LMH0395SQ/NOPB?
The device is packaged in a 24-pin WQFN package.
- Does the LMH0395SQ/NOPB have power-saving features?
- What standards does the LMH0395SQ/NOPB support?
The device supports ST 424, ST 292, ST 344, ST 259, and DVB-ASI standards.
- How can the output de-emphasis be adjusted on the LMH0395SQ/NOPB?
The output de-emphasis can be programmed to compensate for FR4 board trace losses through the SPI interface.
