Overview
The LTC6820IMS#3ZZPBF, produced by Analog Devices Inc., is an isoSPI Isolated Communications Interface designed to facilitate bidirectional SPI communications between two isolated devices. This component uses a single twisted-pair connection to encode logic states into signals that are transmitted across an isolation barrier, ensuring high levels of isolation and reducing electromagnetic interference (EMI). The LTC6820 is particularly useful in applications requiring reliable and isolated communication between different domains.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| VDD | Supply Voltage | 2.7 | - | 5.5 | V |
| VDDS | IO Supply Voltage | 1.7 | - | 5.5 | V |
| Operating Temperature | - | -40 | - | 125 | °C |
| Package Type | - | - | - | 16-Lead Plastic MSOP | - |
| Input Leakage Current (ILEAK(DIG)) | VDDS = 1.7V to 5.5V | - | - | ±1 µA | - |
| Output Resistance | VDD = 5V, Sourcing 2mA | 40 | - | 60 | Ω |
| Data Rate | - | - | - | Up to 1 MHz | - |
Key Features
- Bidirectional SPI communications through a single twisted-pair connection.
- High isolation capability, achieving hundreds of volts of isolation using a simple pulse transformer.
- Low EMI due to differential signaling with matched source and sink currents.
- Precision window comparators for reliable signal detection.
- Operating temperature range from -40°C to 125°C.
- Available in automotive grade with controlled manufacturing for reliability and quality.
Applications
- Industrial control systems requiring isolated communication.
- Automotive systems, including CAN, audio, and Ethernet interfaces.
- Medical devices needing high isolation for safety.
- Industrial I/O and IO-Link applications.
- Any system requiring reliable, isolated SPI communication.
Q & A
- What is the primary function of the LTC6820IMS#3ZZPBF? The primary function is to provide bidirectional SPI communications between two isolated devices through a single twisted-pair connection.
- What is the maximum data rate supported by the LTC6820? The LTC6820 supports data rates up to 1 MHz.
- What is the operating temperature range of the LTC6820IMS#3ZZPBF? The operating temperature range is from -40°C to 125°C.
- How does the LTC6820 achieve high isolation? The LTC6820 achieves high isolation by using a simple pulse transformer to bridge the isolation barrier.
- What package type is the LTC6820IMS#3ZZPBF available in? It is available in a 16-Lead Plastic MSOP package.
- Is the LTC6820 suitable for automotive applications? Yes, it is available in an automotive grade with controlled manufacturing for reliability and quality.
- What is the typical application of the LTC6820 in industrial settings? It is typically used in industrial control systems and industrial I/O applications requiring isolated communication.
- How does the LTC6820 reduce EMI? The LTC6820 reduces EMI by using differential signaling with matched source and sink currents.
- What is the role of the precision window comparators in the LTC6820? The precision window comparators detect the differential signals reliably.
- Can the LTC6820 be used in medical devices? Yes, it can be used in medical devices due to its high isolation capability, which is crucial for safety.
