adum3300 Analog Devices, Inc., adum3300 Datasheet - Page 19

• Manufacturer Part Number: adum3300
• Description: Triple-channel, Digital Isolators, Enhanced System-level Esd Reliability
• Manufacturer: Analog Devices, Inc.

POWER CONSUMPTION
The supply current at a given channel of the ADuM330x
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
For each output channel, the supply current is given by
where:
I
per channel (mA/Mbps).
C
V
f is the input logic signal frequency (MHz); it is half of the input
data rate expressed in units of Mbps.
f
I
supply currents (mA).
To calculate the total I
currents for each input and output channel corresponding to
V
channel input supply current as a function of data rate. Figure 7
and Figure 8 provide per-channel output supply current as a
function of data rate for an unloaded output condition and for a
15 pF output condition, respectively. Figure 9 through Figure 12
provide total I
rate for ADuM3300/ADuM3301 channel configurations.
r
DDI (D)
DDI (Q)
L
DDO
is the input stage refresh rate (Mbps).
DD1
is the output load capacitance (pF).
I
I
I
I
and V
is the output supply voltage (V).
DDI
DDI
DDO
DDO
, I
, I
DDO (D)
DDO (Q)
= I
= I
= (I
= I
DD2
DDI (Q)
DDI (D)
DDO (Q)
DDO (D)
are the input and output dynamic supply currents
are the specified input and output quiescent
DD1
are calculated and totaled. Figure 6 provides per-
× (2f − f
and I
+ (0.5 × 10
DD1
DD2
r
) + I
and I
supply current as a function of data
−3
DDI (Q)
) × C
DD2
supply current, the supply
L
× V
DDO
) × (2f − f
f ≤ 0.5 f
f > 0.5 f
f ≤ 0.5 f
r
f > 0.5 f
) + I
DDO (Q)
r
r
r
r
Rev. 0 | Page 19 of 20
ADuM3300/ADuM3301