Overview
The LTC6820HMS#3ZZTRPBF, produced by Analog Devices Inc., is a specialized integrated circuit designed to facilitate bidirectional SPI (Serial Peripheral Interface) communications between two isolated devices. This component uses a single twisted-pair connection to encode and decode logic signals, ensuring reliable and isolated communication. The LTC6820 is particularly useful in applications requiring high reliability and isolation, such as in industrial, automotive, and medical devices.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Operating Temperature Range (LTC6820I) | -40°C | 85°C | ||
| Operating Temperature Range (LTC6820H) | -40°C | 125°C | ||
| Storage Temperature Range | -65°C | 150°C | ||
| Lead Temperature (Soldering, 10 sec) | 300°C | |||
| VDD Supply Voltage | 2.7V | 5.5V | ||
| VDDS Supply Voltage | 1.7V | 5.5V | ||
| Digital Voltage Output Low (VOL) at VDDS = 3.3V, Sinking 3.3mA | 0.2V | 0.25V | ||
| Digital Pin Input Leakage Current (ILEAK(DIG)) | 625nA | 4µA |
Key Features
- Bidirectional SPI communication through a single twisted-pair connection, enabling isolated communication between two devices.
- Operating temperature ranges of -40°C to 85°C for the LTC6820I and -40°C to 125°C for the LTC6820H, ensuring robust performance in various environments.
- Supply voltage range of 2.7V to 5.5V for VDD and 1.7V to 5.5V for VDDS, providing flexibility in power supply configurations.
- Low digital voltage output low (VOL) and high input leakage current tolerance, ensuring reliable signal transmission.
- Automotive-grade versions available, designated with the #3ZZ suffix, to support the quality and reliability requirements of automotive applications.
Applications
- Industrial automation and control systems where isolation is critical for safety and reliability.
- Automotive systems, including CAN, audio, and Ethernet interfaces, where high temperature and reliability are essential.
- Medical devices requiring isolated communication to ensure patient safety and data integrity.
- IoT and smart home devices that need reliable and isolated communication interfaces.
Q & A
- What is the primary function of the LTC6820? The LTC6820 provides bidirectional SPI communications between two isolated devices through a single twisted-pair connection.
- What are the operating temperature ranges for the LTC6820I and LTC6820H? The LTC6820I operates from -40°C to 85°C, while the LTC6820H operates from -40°C to 125°C.
- What is the supply voltage range for VDD and VDDS? VDD can range from 2.7V to 5.5V, and VDDS can range from 1.7V to 5.5V.
- Is the LTC6820 suitable for automotive applications? Yes, automotive-grade versions are available and are designated with the #3ZZ suffix.
- What is the significance of the twisted-pair connection in the LTC6820? The twisted-pair connection enables isolated communication between two devices, which is crucial for safety and reliability in various applications.
- How does the LTC6820 handle digital voltage output low (VOL)? The LTC6820 ensures a low digital voltage output low (VOL) of 0.2V to 0.25V at VDDS = 3.3V, sinking 3.3mA.
- What is the input leakage current tolerance of the LTC6820? The digital pin input leakage current (ILEAK(DIG)) is typically 625nA and can be up to 4µA.
- Can the LTC6820 be used in industrial automation? Yes, it is suitable for industrial automation and control systems where isolation is critical.
- Is the LTC6820 available in different package types? Yes, it is available in 16-Lead Plastic MSOP packages.
- What is the storage temperature range for the LTC6820? The storage temperature range is from -65°C to 150°C.
