Datasheet > ADUM3480BRSZ-RL7

ADUM3480BRSZ-RL7

更新时间： 2024-02-06 08:03:45

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管接口集成电路
页数	文件大小	规格书
20页	361K
描述
Small, 3.75 kV RMS Quad Digital Isolators (4/0 Channel Directionality)

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ADUM3480BRSZ-RL7 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SSOP
包装说明：	SSOP,	针数：	20
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.57
接口集成电路类型：	INTERFACE CIRCUIT	JESD-30 代码：	R-PDSO-G20
JESD-609代码：	e3	长度：	7.2 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	20	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
座面最大高度：	2 mm	最大供电电压：	5.5 V
最小供电电压：	1.8 V	标称供电电压：	3 V
表面贴装：	YES	技术：	CMOS
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	5.3 mm	Base Number Matches：	1

ADUM3480BRSZ-RL7 数据手册

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ADuM3480/ADuM3481/ADuM3482

Data Sheet

The limitation on the magnetic field immunity of the device is set

by the condition in which induced voltage in the receiving coil

of the transformer is sufficiently large to either falsely set or

reset the decoder. The following analysis defines such conditions.

The ADuM3480/ADuM3481/ADuM3482 are examined in a

3 V operating condition because it represents the most

susceptible mode of operation of these products.

The preceding magnetic flux density values correspond to

specific current magnitudes at given distances away from the

ADuM3480/ADuM3481/ADuM3482 transformers. Figure 18

expresses these allowable current magnitudes as a function of

frequency for selected distances. The ADuM3480/ADuM3481/

ADuM3482 are very insensitive to external fields. Only extremely

large, high frequency currents that are very close to the component

are a concern. For the 1 MHz example noted, a 1.2 kA current would

need to be placed 5 mm away from the ADuM3480/ADuM3481/

ADuM3482 to affect component operation.

The pulses at the transformer output have an amplitude of

greater than 1.5 V. The decoder has a sensing threshold of

approximately = 1.0 V, thereby establishing a 0.5 V margin

within which induced voltages can be tolerated. The voltage

induced across the receiving coil is given by

1000

DISTANCE = 1m

100

V = (−dβ / dt)∑πr_n; n = 1, 2, …, N

where:

β is the magnetic flux density.

DISTANCE = 100mm

r_nis the radius of the n^thturn in the receiving coil.

N is the number of turns in the receiving coil.

Given the geometry of the receiving coil in the ADuM3480/

ADuM3481/ADuM3482 and an imposed requirement that the

induced voltage be, at most, 50% of the 0.5 V margin at the

decoder, a maximum allowable magnetic field is calculated as

shown in Figure 17.

DISTANCE = 5mm

0.1

0.01

10k

100k

10M

100M

MAGNETIC FIELD FREQUENCY (Hz)

100

Figure 18. Maximum Allowable Current for Various Current to ADuM3480

Spacings

Note that at combinations of strong magnetic field and high

frequency, or any loops formed by PCB traces, can induce

sufficiently large error voltages to trigger the thresholds of

succeeding circuitry. Take care to avoid PCB structures that

form loops.

0.1

POWER CONSUMPTION

The supply current at a given channel of the ADuM3480/

ADuM3481/ADuM3482 isolator is a function of the supply

voltage, the data rate of the channel, and the output load of the

channel.

0.01

0.001

10k

100k

10M

100M

MAGNETIC FIELD FREQUENCY (Hz)

Calculating I_DD1or I_DD2

Figure 17. Maximum Allowable External Magnetic Flux Density

For each input channel, assuming worst case I/O voltage, the

supply current is given by

For example, at a magnetic field frequency of 1 MHz, the

maximum allowable magnetic field of 0.5 kgauss induces a voltage

of 0.25 V at the receiving coil. This is about 50% of the sensing

threshold and does not cause a faulty output transition. If such

an event occurs, with the worst-case polarity, during a transmitted

pulse, it reduces the received pulse from >1.0 V to 0.75 V. This is

still well above the 0.5 V sensing threshold of the decoder.

_DDI= I_{DDI (Q)}

R_D≤ 2.5 × R_R

R_D> 2.5 × R_R

I_DDI= I_{DDI (D)}× (R_D−R_R) + I_{DDI (Q)}

For each output channel, the supply current is given by

_DDO= I_{DDO (D)}× R_D+ I_{DDO (Q)}

Rev. A | Page 18 of 20

1...15 16 171819 20

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与ADUM3480BRSZ-RL7相关器件

型号	品牌	描述	获取价格	数据表
ADUM3481	ADI	Small, 3.75 kV RMS Quad Digital Isolators	获取价格
ADUM3481ARSZ	ADI	暂无描述	获取价格
ADUM3481ARSZ-RL7	ADI	Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality)	获取价格
ADUM3481BRSZ	ADI	Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality)	获取价格
ADUM3481BRSZ-RL7	ADI	Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality)	获取价格
ADUM3482	ADI	Small, 3.75 kV RMS Quad Digital Isolators	获取价格

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