Datasheet > ADUM3481BRSZ-RL7

ADUM3481BRSZ-RL7

更新时间： 2024-02-29 02:27:57

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 (3/1 Channel Directionality)

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ADUM3481BRSZ-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：	1.58
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

ADUM3481BRSZ-RL7 数据手册

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Data Sheet

ADuM3480/ADuM3481/ADuM3482

Calculating I_DDL1or I_DDL2

Acceleration factors for several operating conditions are determined.

These factors allow calculation of the time to failure at the actual

working voltage. The values shown in Table 16 summarize the

peak voltage for 50 years of service life for a bipolar ac operating

condition and the maximum CSA/VDE approved working voltages.

In many cases, the approved working voltage is higher than the

50-year service life voltage. Operation at these high working

voltages can lead to shortened insulation life in some cases.

For each input channel, the supply current is given by

I_DDIL= I_{DDIL (D)}× R_D+ I_{DDIL (Q)}

For each output channel, the supply current is given by

C_L×V_DDOL×10⁻³













I_DDOL

I_{DDOL (D)}

R_D+ I_{DDOL (Q)}

where:

C_Lis the output load capacitance (pF).

_DDOLis the output supply voltage (V).

The insulation lifetime of the

ADuM3480/ADuM3481/ADuM3482 depends on the voltage

waveform type imposed across the isolation barrier. The iCoupler

insulation structure degrades at different rates depending on

whether the waveform is bipolar ac, unipolar ac, or dc. Figure 19,

Figure 20,and Figure 21 illustrate these different isolation

voltage waveforms.

R_Dis the input logic signal data rate (Mbps); it is twice the input

frequency, expressed in units of MHz.

R_Ris the input stage refresh rate (Mbps) = 1/t_r(µs)

_{DDI (Q)}, I_{DDIL (Q)}, I_{DDO (Q)}, I_{DDOL (Q)}are the specified input and output

quiescent supply currents (mA).

_{DDI (D)}, I_{DDIL (D)}, I_{DDO (D)}, and I_DDOL(D)are the input and output

Bipolar ac voltage is the most stringent environment. The goal

of a 50-year operating lifetime under the ac bipolar condition

determines the maximum working voltage recommended by

Analog Devices.

dynamic supply currents per channel (mA/Mbps).

As inputs and outputs can be present on each side of the device,

the calculations refer to the current drawn from the local supply.

For example, if an output is on Side 2 of a part, the I_DDOLcurrent

is drawn from the V_DDL2pin of the part. The I_DDL1and I_DDL2currents

are dependent on V_DDL1and V_DDL2, the data rate, and the capacitive

load. It is nearly independent of the value of the core supplies.

In the case of unipolar ac or dc voltage, the stress on the insulation

is significantly lower. This allows operation at higher working

voltages while still achieving a 50-year service life. The working

voltages listed in Table 16 can be applied while maintaining the

50-year minimum lifetime, provided that the voltage conforms to

either the unipolar ac or dc voltage case. Treat any cross-insulation

voltage waveform that does not conform to Figure 19, Figure 20,

or Figure 21 as a bipolar ac waveform, and limit its peak voltage

to the 50-year lifetime voltage value listed in Table 16.

To calculate the total I_DD1, I_DDL1, I_DD2, and I_DDL2supply current, the

supply currents for each input and output channel corresponding to

V_DD1, V_DDL1, V_DD2, and V_DDL2are calculated and totaled, or read from

Figure 8 through Figure 14.

The input current for the regulated core power supplies is

nearly independent of the I/O voltage, and scales with data rate.

The I_DDIcurrent is not linear down to dc, but goes to a minimum

value between about 2.5 × R_Rand dc. This is due to the refresh

circuit establishing a minimum data rate; the values in Figure 8 and

Figure 9 and the quiescent currents in Table 3, Table 6, and Table 9

approximate the current in this region. V_DDI, V_DDO, V_DDIL, and

Note that the voltage presented in Figure 20 is shown as sinusoidal

for illustration purposes only. It is meant to represent any voltage

waveform varying between 0 V and some limiting value. The limiting

value can be positive or negative, but the voltage cannot cross 0 V.

RATED PEAK VOLTAGE

_DDOLrepresent the voltages on the core and I/O power supply

Figure 19. Bipolar AC Waveform

RATED PEAK VOLTAGE

pins for the input and output of a given channel. I represents an

input, O is an output, and L denotes an I/O supply.

INSULATION LIFETIME

All insulation structures eventually break down when subjected to

voltage stress over a sufficiently long period. The rate of insulation

degradation depends on the characteristics of the voltage waveform

applied across the insulation. In addition to the testing performed

by the regulatory agencies, Analog Devices carries out an extensive

set of evaluations to determine the lifetime of the insulation

structure within the ADuM3480/ADuM3481/ADuM3482.

Figure 20. Unipolar AC Waveform

RATED PEAK VOLTAGE

Figure 21. DC Waveform

Analog Devices performs accelerated life testing using voltage

levels that are higher than the rated continuous working voltage.

Rev. A | Page 19 of 20

1...16 17 181920

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ADUM3481BRSZ-RL7 替代型号

型号	品牌	替代类型	描述	数据表
ADUM3481BRSZ	ADI	类似代替	Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality)

与ADUM3481BRSZ-RL7相关器件

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ADUM3482BRSZ	ADI	获取价格	暂无描述
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ADUM4070ARIZ-RL	ADI	获取价格	暂无描述
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