Dual Channel Digital Isolator - 5K Rms (Adum2281) - Analog Devices ADSP-CM419F Manual

Cpa

Hide thumbs Also See for ADSP-CM419F:

Table of Contents

• UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity

• FIFO receives and transmits buffers for high-data throughput

• Device supplied pre-programmed with unique USB serial number

• Supports bus powered, self-powered and high-power bus powered USB configurations

• Integrated +3.3V level converter for USB I/O

• Integrated level converter on UART and CBUS for interfacing to between +1.8V and +5V logic

• True 5V/3.3V/2.8V/1.8V CMOS drive output and TTL input

• Configurable I/O pin output drive strength

• Integrated power-on-reset circuit

• Fully-integrated AVCC supply filtering - no external filtering required.

• UART signal inversion option

• +3.3V (using external oscillator) to +5.25V (internal oscillator) single supply operation

• Low-operating and USB suspend current

• Low USB bandwidth consumption

• UHCI/OHCI/EHCI host controller compatible

• USB 2.0 full speed compatible

Dual channel Digital Isolator – 5K RMS (ADuM2281)

The ADuM2280/ADuM2281/ADuM2285/ADuM2286ADuM228x in this data sheet) are 5 kV rms dual-channel

digital isolators based on Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and

monolithic air core transformer technology, these isolation components provide outstanding performance

characteristics superior to alternatives, such as optocoupler devices and other integrated couplers.

With propagation delay at 24 ns maximum, pulse width distortion is less than 2 ns for C grade. Channel-to-channel

matching is tight at 5 ns for C grade. The ADuM228x are available in two channel configurations with three

different data rates up to 100 Mbps (see the Ordering Guide). All models operate with the supply voltage on either

side ranging from 2.7 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling a voltage

translation functionality across the isolation barrier. Unlike other optocoupler alternatives, the ADuM228x isolators

have a patented refresh feature that ensures dc correctness in the absence of input logic transitions. When power is

first applied or is not yet applied to the input side, the

the

ADuM2285

and

ADuM2286

ADuM2280

have a default low output.

and

ADuM2281

have a default high output and

Table of Contents