Datasheet > ADBMS6822

ADBMS6822

更新时间： 2024-11-03 14:57:55

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描述
单通道/双通道isoSPI收发器

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ADBMS6822 数据手册

Data Sheet

ADBMS6821/ADBMS6822

Single/Dual isoSPI Transceiver

FEATURES

FUNCTIONAL BLOCK DIAGRAM

► Up to 2 Mbps isolated bidirectional serial data communications

► Drop in compatible: single (ADBMS6821) and dual

(ADBMS6822)

► Fully independent dual transceivers (ADBMS6822)

► Simple galvanic isolation using capacitors or transformers

► Bidirectional interface over a single twisted pair

► Supports cable lengths up to 100 meters

► Very low EMI susceptibility and emissions

► LPCM support for Analog Devices battery monitors

► Interrupt output for LPCM system wake-up

► 4 Mbps unidirectional mode

► Requires no software changes in most SPI systems

► Ultralow idle current

► Automatic interface wake-up detection

► Operating temperature range: –40°C to +125°C

► 3.0 V to 5.5 V isoSPI driver power supply

► 1.7 V to 5.5 V interface to microcontrollers

► 3.0 V to 30 V input for powering wake-up and monitoring func-

tions (12 V battery compatible)

Figure 1.

GENERAL DESCRIPTION

The ADBMS6821¹(single) and ADBMS6822¹(dual) provide bidir-

ectional isolated serial port interface (isoSPI ) communications

►

32-lead, side solderable LFCSP

™

► AEC-Q100 qualified for automotive applications

between two isolated devices through a single twisted pair connec-

tion for each data link. Each transceiver encodes logic states into

signals that are transmitted across an isolation barrier to another

transceiver. The receiving device decodes the transmission and

drives the slave bus to the appropriate logic states. The isolation

barrier can be bridged by capacitors or by a pulse transformer to

achieve hundreds of volts of isolation.

APPLICATIONS

► Electric and hybrid electric vehicles

► Backup battery systems

► Industrial networking

► Remote sensors

The ADBMS6821/ADBMS6822 transceivers drive differential sig-

nals using matched source and sink currents, eliminating the re-

quirement for a transformer center tap and reducing electromagnet-

ic interference (EMI). Precision window comparators in the receiver

detect the differential signals.

The transceivers can be paired with advanced Analog Devices,

Inc., battery stack monitors to enable cell voltage and sensor moni-

toring even while the system controller is powered down (low power

cell monitoring, or LPCM). The transceivers provide a timeout

function that wake up or alert the system when a pass heartbeat

message has not been received in the programmed time period.

Throughout this data sheet, all pin names refer to both transceivers

on the ADBMS6822. For example, VDD refers to both VDD and

VDD2.

For more information on the ADBMS6821 or ADBMS6822, visit the ADBMS6821 or ADBMS6822 product page.

Protected by U.S. patents, including 8,908,779.

Rev. Sp0

Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog

DOCUMENT FEEDBACK

TECHNICAL SUPPORT

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to

change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

中文翻译

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