Data Sheet
ADuM2210/ADuM2211
For example, at a magnetic field frequency of 1 MHz, the
maximum allowable magnetic field of 0.2 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.
Similarly, if such an event were to occur during a transmitted
pulse (and was of the worst-case polarity), it would reduce the
received pulse from >1.0 V to 0.75 V—still well above the 0.5 V
sensing threshold of the decoder.
POWER CONSUMPTION
The supply current at a given channel of the ADuM221x
isolator is a function of the supply voltage, the channel’s data
rate, and the channel’s output load.
For each input channel, the supply current is given by
I
I
DDI = IDDI (Q)
f ≤ 0.5fr
f > 0.5fr
DDI = IDDI (D) × (2f − fr) + IDDI (Q)
The preceding magnetic flux density values correspond to
specific current magnitudes at given distances away from the
ADuM221x transformers. Figure 15 expresses these allowable
current magnitudes as a function of frequency for selected
distances. As can be seen, the ADuM221x is immune and can
be affected only by extremely large currents operated at high
frequency and very close to the component. For the 1 MHz
example noted previously, one would have to place a 0.5 kA current
5 mm away from the ADuM221x to affect operation of the
component.
For each output channel, the supply current is given by
I
I
DDO = IDDO (Q)
f ≤ 0.5fr
DDO = (IDDO (D) + (0.5 × 10−3) × CL × VDDO) × (2f − fr) + IDDO (Q)
f > 0.5fr
where:
DDI (D), IDDO (D) are the input and output dynamic supply currents
I
per channel (mA/Mbps).
CL is the output load capacitance (pF).
V
DDO is the output supply voltage (V).
1000
f is the input logic signal frequency (MHz, half of the input data
DISTANCE = 1m
rate, NRZ signaling).
fr is the input stage refresh rate (Mbps).
100
I
DDI (Q), IDDO (Q) are the specified input and output quiescent
supply currents (mA).
10
DISTANCE = 100mm
To calculate the total IDD1 and IDD2, the supply currents for
each input and output channel corresponding to IDD1 and IDD2
are calculated and totaled. Figure 6 and Figure 7 provide per-
channel supply currents as a function of data rate for an
unloaded output condition. Figure 8 provides per-channel
supply current as a function of data rate for a 15 pF output
condition. Figure 9 through Figure 11 provide total IDD1 and IDD2
as a function of data rate for ADuM2210/ADuM2211 channel
configurations.
1
DISTANCE = 5mm
0.1
0.01
1k
10k
100k
1M
10M
100M
MAGNETIC FIELD FREQUENCY (Hz)
Figure 15. Maximum Allowable Current
for Various Current-to-ADuM221x Spacings
Note that at combinations of strong magnetic field and high
frequency, any loops formed by printed circuit board traces can
induce sufficiently large error voltages to trigger the thresholds
of succeeding circuitry. Care should be taken in the layout of
such traces to avoid this possibility.
Rev. A | Page 17 of 2
5秒后页面跳转
AT24C256芯片手册参数分析、引脚说明、读写程序示例
LAN8720A的替代型号推荐、资料手册数据分析、特点介绍
SS8550数据手册：应用场景、主要参数分析、特性分析
UC3845全面解析：资料手册参数、引脚详解、维修技巧与替代型号推荐
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
技术参数
数据手册
如果您发现信息不准确，
