Overview
The LMH0034MA/NOPB from Texas Instruments is a monolithic integrated circuit designed as an adaptive cable equalizer. It is specifically tailored to equalize data transmitted over cable, complying with SMPTE 292M, SMPTE 259M, and DVB-ASI standards. This device supports data rates ranging from 125 Mbps to 1.485 Gbps, making it versatile for various high-speed digital video applications. The LMH0034MA/NOPB features a compact 16-pin SOIC package and operates with a single 3.3V supply, ensuring efficient power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Brand | Texas Instruments |
| Maximum Data Rate | 1.485 Gbps |
| Maximum Equalisation Length | 400 meters (at 270 Mbps), 200 meters (at 1.485 Gbps) |
| Maximum Input Return Loss | 20 dB |
| Maximum Jitter | 0.2 UI |
| Maximum Supply Current | 77 mA |
| Mounting Type | Surface Mount |
| Package Type | SOIC |
| Pin Count | 16 |
| Dimensions | 10 x 3.988 x 1.397 mm |
| Maximum Operating Supply Voltage | 3.6 V |
| Maximum Operating Temperature | +85 °C |
| Minimum Operating Supply Voltage | -0.5 V |
| Minimum Operating Temperature | 0 °C |
| Operating Supply Voltage Range | -0.5 to 3.6 V |
| Operating Temperature Range | 0 to +85 °C |
Key Features
- Adaptive Equalization: Automatically adjusts to compensate for signal degradation over long cable lengths.
- DC Restoration: Correctly handles pathological data conditions and can be bypassed for low data rate applications.
- Manual Bypass and Cable Length Indicator: Allows for manual bypass and provides a voltage indicator proportional to the cable length being equalized.
- Output Mute with Programmable Threshold: Mutes the output when the signal falls below a selectable level, indicating signal degradation.
- Single-Ended or Differential Input Drive: Flexible input options to accommodate different system designs.
- 50Ω Differential Outputs: Ensures high-quality signal transmission.
- Single 3.3V Supply Operation: Efficient power consumption with a typical power consumption of 208 mW.
Applications
The LMH0034MA/NOPB is designed for high-speed digital video applications, including:
- SMPTE 292M and SMPTE 259M Compliant Systems: Suitable for broadcast and professional video equipment.
- DVB-ASI Systems: Used in digital video broadcasting applications.
- Long-Haul Video Transmission: Ideal for equalizing signals over extended cable lengths.
- Professional Video Equipment: Used in various professional video devices requiring high-speed data transmission.
Q & A
- What is the maximum data rate supported by the LMH0034MA/NOPB?
The LMH0034MA/NOPB supports a maximum data rate of 1.485 Gbps. - What are the operating temperature and voltage ranges for the LMH0034MA/NOPB?
The operating temperature range is 0 to +85 °C, and the operating supply voltage range is -0.5 to 3.6 V. - What types of input drive does the LMH0034MA/NOPB support?
The device supports both single-ended and differential input drive. - What is the purpose of the DC restoration feature in the LMH0034MA/NOPB?
The DC restoration feature correctly handles pathological data conditions and can be bypassed for low data rate applications. - How does the output mute feature work in the LMH0034MA/NOPB?
The output mute feature mutes the output when the signal falls below a selectable level, indicating signal degradation. - What is the typical power consumption of the LMH0034MA/NOPB?
The typical power consumption is 208 mW with a 3.3V supply. - What are the dimensions of the LMH0034MA/NOPB package?
The dimensions are 10 x 3.988 x 1.397 mm. - Is the LMH0034MA/NOPB RoHS compliant?
Yes, the LMH0034MA/NOPB is RoHS compliant. - What is the maximum equalization length supported by the LMH0034MA/NOPB?
The device can equalize up to 400 meters of cable at 270 Mbps and up to 200 meters at 1.485 Gbps. - What standards does the LMH0034MA/NOPB comply with?
The device complies with SMPTE 292M, SMPTE 259M, and DVB-ASI standards.
