Overview
The LMH0307SQ/NOPB from Texas Instruments is a 3G HD/SD SDI dual output cable driver designed for high-performance video transmission. This device is compliant with SMPTE 259M, SMPTE 424M, SMPTE 292M, and SMPTE 344M standards, supporting data rates up to 2.97 Gbps. It features intelligent sensing capabilities, including cable detect and input loss of signal (LOS) detection, which enhance system diagnostics and power management. The LMH0307 operates from a single 3.3V supply and is available in two compact packages: a 16-pin WQFN and a 25-ball CS-BGA package.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Supply Voltage | 3.3V ±5% | Recommended operating voltage range |
| Operating Temperature | −40°C to +85°C | Industrial temperature range |
| Data Rates | Up to 2.97 Gbps | Compliant with SMPTE 259M, SMPTE 424M, SMPTE 292M, and SMPTE 344M |
| Output Type | Dual Complementary 75Ω Outputs | Drives 75Ω transmission lines |
| Input Type | Differential or Single-Ended | Flexible input configuration |
| Power Consumption | 230 mW (SD Mode), 275 mW (HD Mode) | Typical power consumption in different modes |
| Power Save Mode | 4 mW | Deep power save mode when enabled |
| Package Options | 16-Pin WQFN, 25-Ball CS-BGA | Compact package options |
| Slew Rate Control | Selectable for SMPTE 259M and SMPTE 424M / 292M compliance | Adjustable via SD/HD pin or SMBus |
| Output Amplitude Adjustment | ±10% in 5 mV steps via SMBus | Adjustable output amplitude |
Key Features
- Intelligent Sensing Capabilities: Includes cable detect and input loss of signal (LOS) detection to improve system diagnostics and activate deep power save mode.
- Selectable Slew Rates: Supports SMPTE 259M and SMPTE 424M / 292M compliance via the SD/HD pin or SMBus.
- Adjustable Output Amplitude: Output amplitude is adjustable ±10% in 5 mV steps via the SMBus.
- Power Management: Typical power consumption of 230 mW in SD mode and 275 mW in HD mode, with a deep power save mode of 4 mW.
- Flexible Input Configuration: Accepts either differential or single-ended input signals.
- SMBus Interface: Allows for control and monitoring of various device parameters, including slew rate, output amplitude, and fault detection.
Applications
- SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M Serial Digital Interfaces: Ideal for high-definition and standard-definition video transmission.
- Digital Video Routers and Switches: Enhances signal integrity and diagnostics in video routing systems.
- Distribution Amplifiers: Used to amplify and distribute video signals while maintaining signal quality.
Q & A
- What are the key standards that the LMH0307 complies with?
The LMH0307 is compliant with SMPTE 259M, SMPTE 424M, SMPTE 292M, and SMPTE 344M standards.
- What is the maximum data rate supported by the LMH0307?
The LMH0307 supports data rates up to 2.97 Gbps.
- How does the LMH0307 manage power consumption?
The device has a typical power consumption of 230 mW in SD mode and 275 mW in HD mode, with a deep power save mode of 4 mW.
- What types of input signals does the LMH0307 support?
The LMH0307 accepts either differential or single-ended input signals.
- How can the output amplitude of the LMH0307 be adjusted?
The output amplitude is adjustable ±10% in 5 mV steps via the SMBus interface.
- What is the purpose of the cable detect feature in the LMH0307?
The cable detect feature senses near-end termination to determine if a cable is correctly attached to the output BNC.
- How does the LMH0307 detect input loss of signal (LOS)?
The LMH0307 detects when the input signal does not have a video-like pattern, rejecting self-oscillation and low levels of noise.
- What is the role of the SMBus interface in the LMH0307?
The SMBus interface allows for control and monitoring of various device parameters, including slew rate, output amplitude, and fault detection.
- In what packages is the LMH0307 available?
The LMH0307 is available in a 16-pin WQFN and a 25-ball CS-BGA package.
- What are some typical applications of the LMH0307?
The LMH0307 is used in SMPTE serial digital interfaces, digital video routers and switches, and distribution amplifiers.
