參數(shù)資料
型號(hào)： ADUM1410
廠商： Analog Devices, Inc.
英文描述： Quad-Channel Digital Isolators
中文描述： 四通道數(shù)字隔離器
文件頁(yè)數(shù)： 18/20頁(yè)
文件大?。?/td> 277K
代理商： ADUM1410
ADuM1410/ADuM1411/ADuM1412
APPLICATION INFORMATION
PC BOARD LAYOUT
The ADuM141x digital isolator requires no external interface
circuitry for the logic interfaces. Power supply bypassing is
strongly recommended at the input and output supply pins
(see Figure 16). Bypass capacitors are most conveniently con-
nected between Pin 1 and Pin 2 for V
DD1
, and between Pin 15
and Pin 16 for V
DD2
. The capacitor value should be between
0.01 μF and 0.1 μF. The total lead length between both ends of
the capacitor and the input power supply pin should not exceed
20 mm. Bypassing between Pin 1 and Pin 8 and between Pin 9
and Pin 16 should also be considered unless the ground pair on
each package side is connected close to the package.
Rev. E | Page 18 of 20
V
DD1
GND
1
V
IA
V
IB
V
IC
V
ID
DISABLE
GND
1
Figure 16. Recommended Printed Circuit Board Layout
V
DD2
GND
2
V
OA
V
OB
V
OC
V
OD
CTRL
GND
2
0
In applications involving high common-mode transients, it
is important to minimize board coupling across the isolation
barrier. Furthermore, design the board layout such that any
coupling that does occur equally affects all pins on a given
component side. Failure to ensure this can cause voltage
differentials between pins exceeding the absolute maximum
ratings of the device, thereby leading to latch-up or permanent
damage.
PROPAGATION DELAY-RELATED PARAMETERS
Propagation delay is a parameter that describes the time it takes
a logic signal to propagate through a component. The input to
output propagation delay time for a high to low transition may
differ from the propagation delay time of a low to high
transition.
INPUT (V
IX
)
OUTPUT (V
OX
)
t
PLH
t
PHL
50%
50%
0
Figure 17. Propagation Delay Parameters
Pulse width distortion is the maximum difference between
these two propagation delay values, and it is an indication of
how accurately the timing of the input signal is preserved.
Channel-to-channel matching refers to the maximum amount
the propagation delay differs between channels within a single
ADuM141x component.
Propagation delay skew refers to the maximum amount the
propagation delay differs between multiple ADuM141x
components operating under the same conditions.
DC CORRECTNESS AND MAGNETIC FIELD IMMUNITY
Positive and negative logic transitions at the isolator input
cause narrow (~1 ns) pulses to be sent to the decoder using the
transformer. The decoder is bistable and is, therefore, either set
or reset by the pulses, indicating input logic transitions. In the
absence of logic transitions at the input for more than 2 μs, a
periodic set of refresh pulses indicative of the correct input state
are sent to ensure dc correctness at the output. If the decoder
receives no internal pulses of more than approximately 5 μs, the
input side is assumed to be unpowered or nonfunctional, in
which case the isolator output is forced to a default state (see
Table 10) by the watchdog timer circuit.
The magnetic field immunity of the ADuM141x is determined
by the changing magnetic field which induces a voltage in the
transformer’s receiving coil large enough to either falsely set or
reset the decoder. The following analysis defines the conditions
under which this can occur. The 3 V operating condition of the
ADuM141x is examined because it represents the most suscep-
tible mode of operation.
The pulses at the transformer output have an amplitude greater
than 1.0 V The decoder has a sensing threshold at about 0.5 V thus
establishing a 0.5 V margin in which induced voltages can be
tolerated. The voltage induced across the receiving coil is given by
V
= (
dβ/dt
)
∑
π
r
n2
; n
= 1, 2, … ,
N
where:
β
is magnetic flux density (gauss).
N
is the number of turns in the receiving coil.
r
n
is the radius of the n
th
turn in the receiving coil (cm).
Given the geometry of the receiving coil in the ADuM141x and
an imposed requirement that the induced voltage be, at most,
50% of the 0.5 V margin at the decoder, a maximum allowable
magnetic field at a given frequency can be calculated. The result
is shown in Figure 18.
MAGNETIC FIELD FREQUENCY (Hz)
100
M
D
0.001
1M
10
0.01
1k
10k
10M
0.1
1
100M
100k
0
Figure 18. Maximum Allowable External Magnetic Flux Density
相關(guān)PDF資料
PDF描述
ADUM1410BRWZ Quad-Channel Digital Isolators
ADUM1410BRWZ-RL Quad-Channel Digital Isolators
ADUM1411 Quad-Channel Digital Isolators
ADUM1411ARWZ Quad-Channel Digital Isolators
ADUM1411ARWZ-RL Quad-Channel Digital Isolators
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUM1410_07 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad-Channel Digital Isolators
ADUM1410_10 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad-Channel Digital Isolators
ADUM1410ARWZ 功能描述:IC ISOLATOR DGTL 4CHAN 16-SOIC RoHS:是 類(lèi)別:隔離器 >> 數(shù)字隔離器 系列:iCoupler® 標(biāo)準(zhǔn)包裝:66 系列:iCoupler® 輸入 - 1 側(cè)/2 側(cè):2/2 通道數(shù):4 電源電壓:3.3V，5V 電壓 - 隔離:2500Vrms 數(shù)據(jù)速率:25Mbps 傳輸延遲:60ns 輸出類(lèi)型:邏輯 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:管件 工作溫度:-40°C ~ 105°C
ADUM1410ARWZ-RL 功能描述:IC ISOLATOR DGTL 4CHAN 16-SOIC RoHS:是 類(lèi)別:隔離器 >> 數(shù)字隔離器 系列:iCoupler® 產(chǎn)品培訓(xùn)模塊:IsoLoop® Isolator 標(biāo)準(zhǔn)包裝:50 系列:IsoLoop® 輸入 - 1 側(cè)/2 側(cè):5/0 通道數(shù):5 電源電壓:3 V ~ 5.5 V 電壓 - 隔離:2500Vrms 數(shù)據(jù)速率:110Mbps 傳輸延遲:12ns 輸出類(lèi)型:CMOS 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC N 包裝:管件 工作溫度:-40°C ~ 85°C 其它名稱:390-1053-5
ADUM1410BRWZ 功能描述:IC ISOLATOR DGTL 4CH UNI 16-SOIC RoHS:是 類(lèi)別:隔離器 >> 數(shù)字隔離器 系列:iCoupler® 標(biāo)準(zhǔn)包裝:66 系列:iCoupler® 輸入 - 1 側(cè)/2 側(cè):2/2 通道數(shù):4 電源電壓:3.3V，5V 電壓 - 隔離:2500Vrms 數(shù)據(jù)速率:25Mbps 傳輸延遲:60ns 輸出類(lèi)型:邏輯 封裝/外殼:20-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:20-SSOP 包裝:管件 工作溫度:-40°C ~ 105°C
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