Overview
The LMH1982SQ, produced by Texas Instruments (formerly National Semiconductor), is a multi-rate video clock generator designed for professional video applications. This device is part of the LMH1982 series and is housed in a compact 32-WQFN package. It is specifically engineered to support video synchronization, serial digital interface (SDI) serializers and deserializers (SerDes), video conversion, and editing in broadcast and professional video systems. The LMH1982SQ is ideal for applications requiring high precision and low jitter in video clock generation.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Manufacturer | Texas Instruments | - | Formerly National Semiconductor |
| Product Category | Clock Generator | - | Multi-Rate Video Clock Generator |
| Package / Case | 32-WQFN | - | 5x5 mm |
| Operating Temperature | 0 to +70 | °C | - |
| Supply Voltage | 3.135 to 3.465 | V | - |
| RoHS Compliance | Yes | - | - |
| Jitter | 40 | ps (peak-to-peak) | - |
| Control Interface | I2C | - | - |
| Standards Supported | NTSC, PAL, SMPTE | - | - |
| Factory Pack Quantity | 1000 | - | - |
Key Features
- Supports multi-rate video clock generation for 3G, HD, and SD video applications.
- Low jitter of 40 ps peak-to-peak ensures high precision in video timing.
- Genlock functionality allows synchronization with external reference signals.
- Compact 32-WQFN package for space-constrained designs.
- I2C control interface for easy configuration and integration.
Applications
The LMH1982SQ is widely used in professional video systems, including broadcast equipment, video editing systems, and video conversion devices. Its ability to generate precise video clocks makes it suitable for applications such as video synchronization, SDI serializers and deserializers, and video processing in both HD and SD formats. Additionally, its low jitter performance is critical for meeting stringent SDI output jitter specifications in FPGA-based designs.
Q & A
1. What is the primary function of the LMH1982SQ?
The LMH1982SQ is a multi-rate video clock generator designed for professional video applications, providing precise timing and low jitter.
2. What is the operating temperature range of the LMH1982SQ?
The device operates within a temperature range of 0 to +70°C.
3. What package does the LMH1982SQ come in?
It is housed in a 32-WQFN package measuring 5x5 mm.
4. What standards does the LMH1982SQ support?
It supports NTSC, PAL, and SMPTE standards.
5. What is the jitter performance of the LMH1982SQ?
The device offers a low jitter of 40 ps peak-to-peak.
6. Does the LMH1982SQ support synchronization with external signals?
Yes, it features Genlock functionality for synchronization with external reference signals.
7. What is the supply voltage range for the LMH1982SQ?
The supply voltage ranges from 3.135 to 3.465 V.
8. Is the LMH1982SQ RoHS compliant?
Yes, the device is RoHS compliant.
9. What is the control interface of the LMH1982SQ?
It uses an I2C control interface for configuration.
10. What are typical applications for the LMH1982SQ?
It is used in broadcast equipment, video editing systems, and video conversion devices.
