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参数资料
| 型号： | ADUM5401WCRWZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC ISOLATOR 4CH DCDC CONV 16SOIC |
| 设计资源： | Fully Isolated Input Module Based on AD7793 and ADuM5401(CN0066) Fully Isolated Input Module Based on AD7793, ADuM5401, and a High Performance In-Amp (CN0067) |
| 标准包装： | 1,000 |
| 系列： | IsoPower®, iCoupler® |
| 输入 - 1 侧/2 侧： | 3/1 |
| 通道数： | 4 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电压 - 隔离： | 2500Vrms |
| 数据速率： | 25Mbps |
| 传输延迟： | 45ns |
| 输出类型： | 逻辑 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
Data Sheet
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 25.
100
10
1
0.1
0.01
ADuM5401W/ADuM5402W/ADuM5403W
Note that, in combinations of strong magnetic field and high
frequency, any loops formed by PCB traces can induce error
voltages sufficiently large to trigger the thresholds of succeeding
circuitry. Exercise care in the layout of such traces to avoid this
possibility.
POWER CONSUMPTION
The V DD1 power supply input provides power to the i Coupler data
channels, as well as to the power converter. For this reason, the
quiescent currents drawn by the power converter and the primary
and secondary I/O channels cannot be determined separately.
All of these quiescent power demands have been combined into
the I DD1 (Q) current, as shown in Figure 27. The total I DD1 supply
current is equal to the sum of the quiescent operating current;
the dynamic current, I DD1 (D) , demanded by the I/O channels;
0.001
1k
10k
100k
1M
10M
100M
and any external I ISO load.
MAGNETIC FIELD FREQUENCY (Hz)
I DD1(Q)
I ISO
Figure 25. Maximum Allowable External Magnetic Flux Density
I DD1(D)
CONVERTER
PRIMARY
CONVERTER
SECONDARY
For example, at a magnetic field frequency of 1 MHz, the maxi-
mum allowable magnetic field of 0.2 kgauss induces a voltage of
0.25 V at the receiving coil. This voltage is approximately 50% of
the sensing threshold and does not cause a faulty output transition.
Similarly, if such an event occurs during a transmitted pulse
(and is of the worst-case polarity), it reduces the received pulse
from >1.0 V to 0.75 V, which is still well above the 0.5 V sensing
threshold of the decoder.
I DDP(D)
PRIMARY
DATA
INPUT/OUTPUT
4-CHANNEL
I ISO(D)
SECONDARY
DATA
INPUT/OUTPUT
4-CHANNEL
The preceding magnetic flux density values correspond to specific
current magnitudes at given distances from the ADuM5401W/
ADuM5402W/ADuM5403W transformers. Figure 26 expresses
these allowable current magnitudes as a function of frequency
for selected distances. As shown in Figure 26, the ADuM5401W/
ADuM5402W/ADuM5403W are extremely immune and can be
affected only by extremely large currents operated at high frequency
very close to the component. For the 1 MHz example, a 0.5 kA
current placed 5 mm away from the ADuM5401W/ADuM5402W/
ADuM5403W is required to affect component operation.
1k
Figure 27. Power Consumption Within the
ADuM5401W/ADuM5402W/ADuM5403W
Dynamic I/O current is consumed only when operating a channel
at speeds higher than the refresh rate of f r . The dynamic current
of each channel is determined by its data rate. Figure 19 shows the
current for a channel in the forward direction, meaning that the
input is on the V DD1 side of the part; Figure 20 shows the current
for a channel in the reverse direction, meaning that the input is on
the V ISO side of the part. Both figures assume a typical 15 pF load.
The following relationship allows the total I DD1 current to be
calculated:
DISTANCE = 1m
I DD1 = ( I ISO × V ISO )/( E × V DD1 ) + Σ I CHn ; n = 1 to 4
(1)
100
10
where:
I DD1 is the total supply input current.
I CHn is the current drawn by a single channel determined from
1
0.1
DISTANCE = 100mm
DISTANCE = 5mm
Figure 19 or Figure 20, depending on channel direction.
I ISO is the current drawn by the secondary side external load.
E is the power supply efficiency at 100 mA load from Figure 9 at
the V ISO and V DD1 condition of interest.
The maximum external load can be calculated by subtracting
the dynamic output load from the maximum allowable load.
0.01
1k
10k
100k
1M
10M
100M
I ISO (LOAD) = I ISO (MAX) ? Σ I ISO (D)n ; n = 1 to 4
(2)
MAGNETIC FIELD FREQUENCY (Hz)
Figure 26. Maximum Allowable Current for Various
Current-to-ADuM5401W/ADuM5402W/ADuM5403W Spacings
where:
I ISO (LOAD) is the current available to supply an external secondary
side load.
I ISO (MAX) is the maximum external secondary side load current
Rev. D | Page 21 of 24
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