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參數(shù)資料
| 型號(hào)： | ADUM1510BRWZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | ROHS COMPLIANT, MS-013AA, SOIC-16 |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 228K |
| 代理商： | ADUM1510BRWZ |
ADuM1510
Rev. A | Page 9 of 12
MAGNETIC FIELD FREQUENCY (Hz)
0.01
1k
10k
100M
100k
1M
10M
The preceding magnetic flux density values correspond to
specific current magnitudes at given distances away from the
ADuM1510 transformers. Figure 12 expresses these allowable
current magnitudes as a function of frequency for selected
distances. As seen in Figure 12, the ADuM1510 is extremely
immune and is affected only by extremely large currents
operated at high frequency and very close to the component.
For example, at a magnetic field frequency of 1 MHz, a 0.5 kA
current would need to be placed 5 mm away from the ADuM1510
to affect the operation of the component.
M
AX
IM
UM
AL
L
O
W
AB
L
E
CU
RRE
N
T
(
k
A)
1000
100
10
1
0.1
DISTANCE = 5mm
DISTANCE = 1m
DISTANCE = 100mm
06
79
0-
0
12
OUTPUT
DATA
Figure 12. Maximum Allowable Current for
Various Current- to-ADuM1510 Spacings
Note that at combinations of strong magnetic field and high
frequency, any loops formed by PCB traces can induce
sufficiently large error voltages to trigger the thresholds of
succeeding circuitry. Care should be taken in the layout of such
traces to avoid this possibility.
POWER CONSUMPTION
The supply current at a given channel of the ADuM1510
isolator is a function of the supply voltage, the channel
data rate, and the channel output load.
For each input channel, the supply current is given by
IDDI = IDDI (Q)
f ≤ 0.5fr
IDDI = IDDI (D) × (2f fr) + IDDI (Q)
f > 0.5fr
For each output channel, the supply current is given by
IDDO = IDDO (Q)
f ≤ 0.5fr
IDDO = (IDDO (D) + CLVDDO) × (2f fr) + IDDO (Q)
f ≤ 0.5fr
where:
IDDI (Q), IDDO (Q) are the specified input and output quiescent
supply currents (mA).
IDDI (D), IDDO (D) are the input and output dynamic supply currents
per channel (mA/Mbps).
CL is the output load capacitance (pF).
VDDO is the output supply voltage (V).
f is the input logic signal frequency (MHz, half of the input data
rate, NRZ signaling).
fr is the input stage refresh rate (Mbps).
To calculate the total IDD1 and IDD2 supply current, the supply
currents for each input and output channel corresponding to
provide per-channel supply currents as a function of the data
rate for an unloaded output condition. Figure 6 provides per-
channel supply current as a function of the data rate for a 15 pF
IDD2 supply current as a function of the data rate for ADuM1510
products.
POWER-UP/POWER-DOWN CONSIDERATIONS
Given that the ADuM1510 has separate supplies on each side of
the isolation barrier, the power-up and power-down charac-
teristics relative to each supply voltage need to be considered
individually.
ADuM1510 outputs take on a default low logic condition. As
the VDD1 supply is increased or decreased, the output of each
channel transitions from/to the default condition to/from the
VDD1
2V
(TYP)
0
67
90
-0
13
VDD1
OUTPUT DATA
Figure 13. VDD1 Power-Up/Power-Down Characteristics, Input Data = High
06
790
-01
4
Figure 14. VDD1 Power-Up/Power-Down Characteristics, Input Data = Low
When VDD1 crosses the threshold for activating the refresh circuit
(approximately 2 V), there can be a delay of up to 2 μs before the
output is updated to the correct state, depending on the timing
of the next refresh pulse. When VDD1 is reduced from an on state
below the 2 V threshold, there can be a delay of up to 5 μs before
the output takes on its default low state. This corresponds to the
duration that the watchdog timer circuit at the input is designed
to wait before triggering an output default state.
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