ADUM5402WCRWZ-RL Analog Devices Inc, ADUM5402WCRWZ-RL Datasheet - Page 17

• Manufacturer Part Number: ADUM5402WCRWZ-RL
• Description: 4.5-5.5 V DC 10 Mbit/s 4chnl W/iso Pwr
• Manufacturer: Analog Devices Inc
• Series: IsoPower®, iCoupler®r

Specifications of ADUM5402WCRWZ-RL

• Inputs - Side 1/side 2: 2/2
• Number Of Channels: 4
• Isolation Rating: 2500Vrms
• Voltage - Supply: 4.5 V ~ 5.5 V
• Data Rate: 25Mbps
• Propagation Delay: 45ns
• Output Type: Logic
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Operating Temperature: -40°C ~ 105°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The preceding magnetic flux density values correspond to specific
current magnitudes at given distances from the ADuM5401W/
ADuM5402W/ADuM5403W transformers. Figure 23 expresses
these allowable current magnitudes as a function of frequency
for selected distances. As shown in Figure 23, 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.
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
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
current is equal to the sum of the quiescent operating current;
the dynamic current, I
and any external I
Various Current-to-ADuM5401W/ADuM5402W/ADuM5403W Spacings
DD1 (Q)
I
I
DD1(Q)
DD1(D)
DD1
0.01
100
0.1
1k
10
1
power supply input provides power to the iCoupler data
1k
current, as shown in Figure 24. The total I
DISTANCE = 100mm
INPUT/OUTPUT
Figure 23. Maximum Allowable Current for
ADuM5401W/ADuM5402W/ADuM5403W
Figure 24. Power Consumption Within the
CONVERTER
4-CHANNEL
PRIMARY
PRIMARY
I
DATA
DDP(D)
ISO
10k
DISTANCE = 5mm
load.
MAGNETIC FIELD FREQUENCY (Hz)
DD1 (D)
, demanded by the I/O channels;
100k
E
INPUT/OUTPUT
SECONDARY
SECONDARY
CONVERTER
4-CHANNEL
DATA
1M
I
ISO(D)
DISTANCE = 1m
10M
I
ISO
DD1
supply
100M
Rev. 0 | Page 17 of 20
Dynamic I/O current is consumed only when operating a channel
at speeds higher than the refresh rate of f
of each channel is determined by its data rate. Figure 16 shows the
current for a channel in the forward direction, meaning that the
input is on the V
for a channel in the reverse direction, meaning that the input is on
the V
The following relationship allows the total I
calculated:
where:
I
I
Figure 16 or Figure 17, depending on channel direction.
I
E is the power supply efficiency at 100 mA load from Figure 9 at
the V
The maximum external load can be calculated by subtracting
the dynamic output load from the maximum allowable load.
where:
I
side load.
I
available at V
I
or output channel, as shown in Figure 18 and Figure 19.
The preceding analysis assumes a 15 pF capacitive load on each
data output. If the capacitive load is larger than 15 pF, the additional
current must be included in the analysis of I
POWER CONSIDERATIONS
The ADuM5401W/ADuM5402W/ADuM5403W power input,
data input channels on the primary side, and data channels on
the secondary side are all protected from premature operation by
UVLO circuitry. Below the minimum operating voltage, the
power converter holds its oscillator inactive and all input
channel drivers and refresh circuits are idle. Outputs remain in
a high impedance state to prevent transmission of undefined
states during power-up and power-down operations.
During application of power to V
is held idle until the UVLO preset voltage is reached. At that
time, the data channels initialize to their default low output
state until they receive data pulses from the secondary side.
DD1
CHn
ISO
ISO (LOAD)
ISO (MAX)
ISO (D)n
ADuM5401W/ADuM5402W/ADuM5403W
is the current drawn by the secondary side external load.
is the total supply input current.
is the current drawn by a single channel determined from
I
I
ISO
ISO
DD1
ISO (LOAD)
is the dynamic load current drawn from V
side of the part. Both figures assume a typical 15 pF load.
is the maximum external secondary side load current
and V
is the current available to supply an external secondary
= (I
ISO
= I
ISO
DD1
× V
.
DD1
ISO (MAX)
condition of interest.
ISO
side of the part. Figure 17 shows the current
)/(E × V
− Σ I
ISO (D)n
DD1
) + Σ I
DD1
; n = 1 to 4
, the primary side circuitry
CHn
r
; n = 1 to 4
. The dynamic current
DD1
DD1
current to be
and I
ISO
by an input
ISO (LOAD)
.
(2)
(1)