Overview
The LMH0303SQ/NOPB, produced by Texas Instruments, is a 3-Gbps HD/SD SDI cable driver designed for high-speed serial digital video data transmission applications. This device supports various serial digital video standards including ST 424, ST 292, ST 344, and ST 259. It drives 75-Ω transmission lines at data rates up to 2.97 Gbps and includes intelligent sensing capabilities for system diagnostics, such as cable detect and loss of signal (LOS) detection. These features can be accessed and controlled through an SMBus interface, enhancing system reliability and power efficiency.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Data Rate | Maximum data rate supported | Up to 2.97 Gbps |
| Supply Voltage | Operating supply voltage | 3.3 V |
| Output Impedance | Output impedance of the transmission lines | 75 Ω |
| Input Impedance | Differential input impedance | 100 Ω |
| Output Amplitude | Adjustable output amplitude | ±10% in 5-mV steps |
| Power Consumption | Typical power consumption in SD and HD modes | SD: 130 mW, HD: 155 mW |
| Package | Package type and size | 16-pin WQFN (4x4 mm) |
| Operating Temperature | Industrial temperature range | –40°C to 85°C |
Key Features
- Selectable Slew Rates: Supports ST 259 and ST 424 or 292 compliance through selectable slew rates.
- Cable Detect: Senses near-end termination to determine if a cable is correctly attached to the output BNC.
- Loss of Signal (LOS) Detection: Detects the presence of a valid signal at the input of the cable driver.
- Adjustable Output Amplitude: Output amplitude is adjustable ±10% in 5-mV steps through the SMBus interface.
- SMBus Interface: Allows control and configuration of the device through a two-wire interface.
- Power-Save Mode: Reduces power consumption to 4 mW when in deep power-save mode.
- Multiple Device Support: Supports daisy-chaining of multiple LMH0303 devices on the same SMBus.
Applications
The LMH0303SQ/NOPB is designed for use in various serial digital video applications, including:
- ST 424, ST 292, ST 344, and ST 259 serial digital video systems.
- DVB-ASI at 270 Mbps.
- High-definition (HD) and standard-definition (SD) video transmission.
- Broadcast and professional video equipment.
- Video distribution and transmission systems.
Q & A
- What is the maximum data rate supported by the LMH0303SQ/NOPB?
The LMH0303SQ/NOPB supports data rates up to 2.97 Gbps.
- What is the operating supply voltage of the LMH0303SQ/NOPB?
The device operates on a single 3.3-V supply.
- What types of input signals does the LMH0303SQ/NOPB support?
The device supports both differential and single-ended input signals.
- How does the cable detect feature work?
The cable detect feature senses near-end termination to determine if a cable is correctly attached to the output BNC.
- What is the purpose of the loss of signal (LOS) detection?
The LOS detection detects the presence of a valid signal at the input of the cable driver.
- How can the output amplitude be adjusted?
The output amplitude is adjustable ±10% in 5-mV steps through the SMBus interface.
- What is the typical power consumption of the LMH0303SQ/NOPB in SD and HD modes?
Typically 130 mW in SD mode and 155 mW in HD mode.
- What package type and size does the LMH0303SQ/NOPB come in?
The device is available in a 16-pin WQFN package with a size of 4x4 mm.
- What is the industrial temperature range of the LMH0303SQ/NOPB?
The device operates within an industrial temperature range of –40°C to 85°C.
- Can multiple LMH0303SQ/NOPB devices be controlled on the same SMBus?
Yes, multiple devices can be daisy-chained and controlled on the same SMBus.
