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參數(shù)資料
| 型號(hào)： | ADUM3400CRWZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Quad-Channel, Digital Isolators, Enhanced System-Level ESD Reliability |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | ROHS COMPLIANT, MS-013AA, SOIC-16 |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 243K |
| 代理商： | ADUM3400CRWZ |
ADuM3400/ADuM3401/ADuM3402
POWER CONSUMPTION
The supply current at a given channel of the ADuM340x
isolator is a function of the supply voltage, the channel’s data
rate, and the channel’s output load.
Rev. 0 | Page 22 of 24
For each input channel, the supply current is given by
I
DDI
= I
DDI
(
Q
)
I
DDI
=
I
DDI (D)
× (2
f
f
r
) +
I
DDI
(
Q
)
f
≤ 0.5
f
r
f
> 0.5
f
r
For each output channel, the supply current is given by
I
DDO
= I
DDO
(
Q
)
I
DDO
= (
I
DDO
(
D
)
+ (0.5 × 10
3
) ×
C
L
× V
DDO
) × (2
f f
r
) +
I
DDO
(
Q
)
f
≤ 0.5
f
r
f
> 0.5
f
r
where:
I
DDI (D)
,
I
DDO (D)
are the input and output dynamic supply currents
per channel (mA/Mbps).
C
L
is the output load capacitance (pF).
V
DDO
is the output supply voltage (V).
f
is the input logic signal frequency (MHz); it is half of the input
data rate expressed in units of Mbps.
f
r
is the input stage refresh rate (Mbps).
I
DDI (Q)
,
I
DDO (Q)
are the specified input and output quiescent
supply currents (mA).
To calculate the total I
DD1
and I
DD2
supply current, the supply
currents for each input and output channel corresponding to
V
DD1
and V
DD2
are calculated and totaled. Figure 8 provides per-
channel input supply current as a function of data rate. Figure 9
and Figure 10 provide per-channel supply output current as a
function of data rate for an unloaded output condition and for a
15 pF output condition, respectively. Figure 11 through Figure 15
provide total V
DD1
and V
DD2
supply current as a function of data
rate for ADuM3400/ADuM3401/ADuM3402 channel
configurations.
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