ADUM6402ARWZ Analog Devices Inc, ADUM6402ARWZ Datasheet - Page 21

• Manufacturer Part Number: ADUM6402ARWZ
• Description: IC ISOLATOR 4CH DCDC CONV 16SOIC
• Manufacturer: Analog Devices Inc
• Series: IsoPower®, iCoupler®r

Specifications of ADUM6402ARWZ

• Propagation Delay: 100ns
• Inputs - Side 1/side 2: 2/2
• Number Of Channels: 4
• Isolation Rating: 5000Vrms
• Voltage - Supply: 4.25V, 5V
• Data Rate: 1Mbps
• Output Type: Logic
• Package / Case: 16-SOIC (3.9mm Width)
• Operating Temperature: -40°C ~ 105°C
• No. Of Channels: 4
• Supply Current: 19mA
• Supply Voltage Range: 3V To 5.5V, 4.5V To 5.5V
• Digital Ic Case Style: SOIC
• No. Of Pins: 16
• 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
ADuM640x transformers. Figure 28 expresses these allowable
current magnitudes as a function of frequency for selected
distances. As shown in Figure 28, the ADuM640x 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 ADuM640x 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
data channels, as well as to the power converter. For this reason,
the quiescent currents drawn by the data 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
total I
operating current; the dynamic current, I
the I/O channels; and any external I
I
I
DD1(Q)
DD1(D)
0.01
100
DD1
DD1
0.1
1k
10
1
1k
supply current is equal to the sum of the quiescent
power supply input provides power to the iCoupler
Figure 29. Power Consumption Within the ADuM640x
DISTANCE = 100mm
INPUT/OUTPUT
Figure 28. Maximum Allowable Current for
CONVERTER
4-CHANNEL
Various Current-to-ADuM640x Spacings
PRIMARY
PRIMARY
I
DATA
10k
DDP(D)
DISTANCE = 5mm
DD1 (Q)
MAGNETIC FIELD FREQUENCY (Hz)
current, as shown in Figure 29. The
100k
E
INPUT/OUTPUT
SECONDARY
SECONDARY
CONVERTER
4-CHANNEL
ISO
1M
DATA
load.
I
ISO(D)
DISTANCE = 1m
DD1 (D)
10M
, demanded by
ADuM6400/ADuM6401/ADuM6402/ADuM6403/ADuM6404
I
ISO
100M
Rev. 0 | Page 21 of 24
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 21 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 21 or Figure 22, depending on channel direction.
I
E is the power supply efficiency at 100 mA load from Figure 13
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 23 and Figure 24.
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 ADuM640x 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
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
DD1
ISO (LOAD)
is the dynamic load current drawn from V
ISO
side of the part. Both figures assume a typical 15 pF load.
is the maximum external secondary side load current
is the current available to supply an external secondary
= (I
and V
ISO
= I
ISO
× V
.
DD1
ISO (MAX)
DD1
ISO
side of the part. Figure 22 shows the current
condition of interest.
)/(E × V
− Σ I
ISO (D)n
DD1
) + Σ I
DD1
; n = 1 to 4
, the primary side circuitry
CHn
r
DD1
; n = 1 to 4
. The dynamic current
DD1
current to be
and I
ISO
by an input
ISO (LOAD)
.
(2)
(1)