New Content (1)
Application NotesAN-1478: Isolated SPI Bus for Distinct System Requirements
Features and Benefits
- Isolated Interface: 6000VRMS for 1 Minute
- CSA (IEC/UL) Approved, File #255632
- 100MHz SPI-Compatible I/O
- Configurable SPI Word-Length: 8 to 32 Bits
- Supports Two Isolated Chip Selects
- Falling Edge Sensitive Low Jitter LOAD
- Three Isolated Control or Multiplexer Signals
- 1.71V to 5.5V I/O Voltages
- 3V to 5.5V Supply Voltages
- High Common Mode Transient Immunity
- 15mm × 6.25mm BGA Package
The LTM2895 is a high speed isolated μModule® (micromodule) SPI interface with DAC control signals designed to isolate LTC’s family of general purpose DACs and to isolate general purpose SPI interfaces. The LTM2895 works with DACs and general purpose devices that have a mode (0, 0) SPI interface.
The interface enables fast data throughput, which makes the LTM2895 ideally suited for a wide variety of applications. The high speed SPI-compatible serial port supports 1.71V to 5.5V logic supplies. The LTM2895 is targeted at generic SPI and digital-to-analog converter applications.
The isolation barrier tolerates large voltage ground variations between the logic interface and the isolated side of the LTM2895. Uninterrupted communication is maintained during voltage transients greater than 50kV/μs.
- Remote Interface Control
- Industrial Process Control and Automation
- Test and Measurement Equipment
- Breaking Ground Loops
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit DC2589A shows an LTM2895 isolating and interfacing an LTC2642-16. The LTM2895 is a high speed SPI isolator for interfacing DACs with a full complement of control signals. The LTC2642-16 is a bipolar 16-bit unbuffered voltage output DAC. Low noise isolated power is delivered to the isolated side with a LT3999 push pull driver and isolation transformer.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.