Overview
The ADuM3154BRSZ is a 3.75 kV, 7-channel SPI isolator produced by Analog Devices Inc. This component is part of the iCoupler® and SPIsolator™ series, designed to provide high-speed digital isolation for SPI (Serial Peripheral Interface) applications. The ADuM3154BRSZ supports up to four slave devices and features low propagation delay and jitter, making it suitable for high-speed SPI communications up to 17 MHz.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 3 | - | 5.5 | V | - |
| Isolation Voltage | - | - | 3750 | Vrms | - |
| Operating Temperature | -40 | - | 125 | °C | - |
| Propagation Delay (tpLH / tpHL) | - | - | 14 | ns | - |
| Rise / Fall Time | - | 2.5 | - | ns | - |
| Common Mode Transient Immunity | 25 | - | - | kV/µs | - |
| Supply Current (IDD1, IDD2) at 1 MHz | 3.4 | 6.5 | 13 | mA | CL = 0 pF, DRFAST = 1 MHz, DRSLOW = 0 MHz |
| Supply Current (IDD1, IDD2) at 17 MHz | 11.7 | 15 | 19 | mA | CL = 0 pF, DRFAST = 17 MHz, DRSLOW = 0 MHz |
| Package / Case | - | - | - | 20-SSOP (0.209", 5.30mm Width) | - |
Key Features
- Supports up to four slave devices through a slave select multiplexing system.
- High-speed SPI communication up to 17 MHz with low propagation delay and jitter.
- 3.75 kV isolation voltage for robust electrical isolation.
- Low speed address bus (250 kbps) for selecting the target slave device.
- Operating temperature range from -40°C to 125°C.
- Magnetic coupling technology using iCoupler® chip scale transformer.
- Surface mount package (20-SSOP) for easy integration.
Applications
- Industrial control systems requiring high-speed and isolated SPI communication.
- Medical devices where electrical isolation is critical for safety.
- Automotive systems needing robust and reliable SPI communication.
- Embedded systems in harsh environments requiring isolated interfaces.
- Any application requiring multiple slave SPI devices with high-speed data transfer.
Q & A
- What is the maximum isolation voltage of the ADuM3154BRSZ?
The maximum isolation voltage is 3.75 kVrms.
- What is the maximum SPI clock rate supported by the ADuM3154BRSZ?
The ADuM3154BRSZ supports SPI clock rates up to 17 MHz.
- How many slave devices can the ADuM3154BRSZ support?
The ADuM3154BRSZ can support up to four slave devices.
- What is the typical rise and fall time of the ADuM3154BRSZ?
The typical rise and fall time is 2.5 ns.
- What is the common mode transient immunity of the ADuM3154BRSZ?
The common mode transient immunity is 25 kV/µs.
- What is the operating temperature range of the ADuM3154BRSZ?
The operating temperature range is from -40°C to 125°C.
- What package type is the ADuM3154BRSZ available in?
The ADuM3154BRSZ is available in a 20-SSOP package.
- Does the ADuM3154BRSZ support low speed address bus for slave selection?
Yes, it supports a 250 kbps low speed address bus for selecting the target slave device.
- What technology is used for isolation in the ADuM3154BRSZ?
The ADuM3154BRSZ uses magnetic coupling technology with iCoupler® chip scale transformer.
- Is the ADuM3154BRSZ RoHS compliant?
Yes, the ADuM3154BRSZ is RoHS compliant.
