New Content (1)
Application NotesAN-1478: Isolated SPI Bus for Distinct System Requirements
Features and Benefits
- Supports up to 40 MHz SPI clock speed in delay clock mode
- Supports up to 17 MHz SPI clock speed in 4-wire mode
- 4 high speed, low propagation delay, SPI signal isolation channels
- 2 data channels at 250 kbps
- Delayed compensation clock line
- 20-lead SOIC_IC with 8.3 mm creepage
- High temperature operation: 125°C
- High common-mode transient immunity: >25 kV/μs
- Safety and regulatory approvals
- UL recognition per UL 1577
- 5000 V rms for 1 minute SOIC long package
- CSA Component Acceptance Notice 5A
- VDE certificate of conformity
- DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
- VIORM = 849 V peak
- UL recognition per UL 1577
The ADuM4150 is a 6-channel, SPIsolator™ digital isolator optimized for isolated serial peripheral interfaces (SPIs). Based on the Analog Devices, Inc., iCoupler® chip scale transformer technology, the low propagation delay in the CLK, MO/SI, MI/SO, and SS SPI bus signals supports SPI clock rates of up to 17 MHz. These channels operate with 13 ns propagation delay and 1 ns jitter to optimize timing for SPI.
The ADuM4150 isolator also provides two additional independent low data rate isolation channels, one channel in each direction. Data in the slow channels is sampled and serialized for a 250 kbps data rate with 2.5 μs of jitter.
The ADuM4150 supports a delay clock output on the master side of the device. This output can be used with an additional clocked port on the master to support 40 MHz clock performance. See the Delay Clock section for more information.
- Industrial programmable logic controllers (PLC)
- Sensor isolation
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)
The EVAL-ADuM3150Z supports the ADuM3150ARSZ and ADuM3150BRSZ, which are 6-channel SPIsolator® isolators optimized for use in SPI applications. They include two low speed channels and a clock delay channel for the implementation of 40 MHz SPI data transfers. The evaluation board provides a JEDEC standard, 20-lead SSOP pad layout, support for signal distribution, loopback, and loads referenced to VDDx or GNDx, as well as optimal bypass capacitance. Signal sources can be wired onto the board as well as brought onto the board through edge- mounted SMA connectors (sold separately) or terminal blocks for power connections. The board includes 200 mil header positions for compatibility with Tektronix® active probes.
The EVAL-ADuM3150Z evaluation board can be used to evaluate the ADuM4150ARIZ and the ADuM4150BRIZ devices. Although the pad layout on the EVAL-ADuM3150Z evaluation board does not support the ADuM4150ARIZ and the ADuM4150BRIZ 20-lead SOIC_IC packages, these devices can be evaluated with the ADuM3150ARSZ or the ADuM3150BRSZ. The ADuM4150ARIZ and ADuM3150ARSZ differ by package and isolation capabilities, but are functionally equivalent for evaluation. The same is true for the ADuM4150BRIZ and ADuM3150BRSZ devices.
The board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other electromagnetic interference (EMI) or noise mitigation design features are included on this board. In cases of very high speed operation or when ultralow emissions are required, refer to the AN-1109 Application Note for additional board layout techniques.
For full details, see the ADuM3150 data sheet, which must be used in conjunction with UG-719 when using the EVAL- ADuM3150Z evaluation board.
Supported SPIsolator Models
Features & Benefits
- Access to all six data channels
- Access to the DCLK delayed clock
- Multiple connection options
- Support for Tektronix active probes
- Provision for cable terminations
- Support for PCB edge-mounted coaxial connectors
- Easy configuration
- Installed SPIsolator digital isolator: ADuM3150BRSZ
in the 20-lead SSOP package
Tools & Simulations
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.