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| 型号： | ADUM6403ARWZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 22/28页 |
| 文件大小： | 0K |
| 描述： | IC ISOLATOR 4CH DCDC CONV 16SOIC |
| 标准包装： | 47 |
| 系列： | IsoPower®, iCoupler® |
| 输入 - 1 侧/2 侧： | 1/3 |
| 通道数： | 4 |
| 电源电压： | 4.25V，5V |
| 电压 - 隔离： | 5000Vrms |
| 数据速率： | 1Mbps |
| 传输延迟： | 100ns |
| 输出类型： | 逻辑 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 105°C |
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ADuM6400/ADuM6401/ADuM6402/ADuM6403/ADuM6404
Data Sheet
With a slow V DD1 slew rate (in the millisecond range), the input
voltage is not changing quickly when V DD1 reaches the UVLO
minimum voltage. The current surge is approximately 300 mA
because V DD1 is nearly constant at the 2.7 V UVLO voltage. The
behavior during startup is similar to when the device load is a
short circuit; these values are consistent with the short-circuit
current shown in Figure 16.
When starting the device for V ISO = 5 V operation, do not limit
the current available to the V DD1 power pin to less than 300 mA.
The ADuM640x devices may not be able to drive the output to
the regulation point if a current-limiting device clamps the V DD1
voltage during startup. As a result, the ADuM640x devices can
draw large amounts of current at low voltage for extended
periods of time.
The output voltage of the ADuM640x devices exhibits V ISO
overshoot during startup. If this overshoot could potentially
damage components attached to V ISO , a voltage-limiting device
such as a Zener diode can be used to clamp the voltage. Typical
behavior is shown in Figure 21 and Figure 22.
EMI CONSIDERATIONS
The dc-to-dc converter section of the ADuM640x devices must
operate at 180 MHz to allow efficient power transfer through the
small transformers. This creates high frequency currents that can
propagate in circuit board ground and power planes, causing
edge emissions and dipole radiation between the primary and
secondary ground planes. Grounded enclosures are recommended
for applications that use these devices. If grounded enclosures
are not possible, follow good RF design practices in the layout
of the PCB. See the AN-0971 Application Note for board layout
recommendations.
PROPAGATION DELAY PARAMETERS
Propagation delay is a parameter that describes the time it takes
a logic signal to propagate through a component. The propagation
delay to a logic low output may differ from the propagation
delay to a logic high output.
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 via 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 1 μs, a
periodic set of refresh pulses indicative of the correct input state
is sent to ensure dc correctness at the output. If the decoder
receives no internal pulses for more than approximately 5 μs, the
input side is assumed to be unpowered or nonfunctional, and
the isolator output is forced to a default state by the watchdog
timer circuit. This situation should occur in the ADuM640x
devices only during power-up and power-down operations.
The limitation on the magnetic field immunity of the ADuM640x
is set by the condition in which induced voltage in the receiving
coil of the transformer is sufficiently large to either falsely set or
reset the decoder. The following analysis defines the conditions
under which this may occur. The 3.3 V operating condition of the
ADuM640x is examined because it represents the most suscept-
ible mode of operation.
The pulses at the transformer output have an amplitude greater
than 1.0 V. The decoder has a sensing threshold at approximately
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 = ( ?d β /dt ) ∑ π r n 2 ; n = 1, 2, … , N
where:
β is the magnetic flux density (gauss).
r n is the radius of the n th turn in the receiving coil (cm).
N is the total number of turns in the receiving coil.
Given the geometry of the receiving coil in the ADuM640x 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 is calculated as shown in Figure 29.
INPUT (V Ix )
OUTPUT (V Ox )
t PLH
t PHL
50%
50%
100
10
Figure 28. Propagation Delay Parameters
Pulse width distortion is the maximum difference between
these two propagation delay values and is an indication of how
accurately the timing of the input signal is preserved.
Channel-to-channel matching refers to the maximum amount
that the propagation delay differs between channels within a
single ADuM640x component.
1
0.1
0.01
0.001
1k
10k
100k
1M
10M
100M
Propagation delay skew refers to the maximum amount that
the propagation delay differs between multiple ADuM640x
components operating under the same conditions.
Rev. A | Page 22 of 28
MAGNETIC FIELD FREQUENCY (Hz)
Figure 29. Maximum Allowable External Magnetic Flux Density
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| ADUM6403ARWZ-RL | 功能描述:IC ISOLATOR 4CH DCDC CONV 16SOIC RoHS:是 类别:隔离器 >> 数字隔离器 系列:IsoPower®, iCoupler® 产品培训模块:IsoLoop® Isolator 标准包装:50 系列:IsoLoop® 输入 - 1 侧/2 侧:5/0 通道数:5 电源电压:3 V ~ 5.5 V 电压 - 隔离:2500Vrms 数据速率:110Mbps 传输延迟:12ns 输出类型:CMOS 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 工作温度:-40°C ~ 85°C 其它名称:390-1053-5 |
| ADUM6403CRIZ | 功能描述:隔离器接口集成电路 8mm creepage 4-Ch 5kV Dig Iso Int DC/DC RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube |
| ADUM6403CRIZ-RL | 功能描述:隔离器接口集成电路 8mm creepage 4-Ch 5kV Dig Iso Int DC/DC RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube |
| ADUM6403CRWZ | 功能描述:IC ISOLATOR 4CH DCDC CONV 16SOIC RoHS:是 类别:隔离器 >> 数字隔离器 系列:IsoPower®, iCoupler® 标准包装:66 系列:iCoupler® 输入 - 1 侧/2 侧:2/2 通道数:4 电源电压:3.3V，5V 电压 - 隔离:2500Vrms 数据速率:25Mbps 传输延迟:60ns 输出类型:逻辑 封装/外壳:20-SSOP（0.209"，5.30mm 宽） 供应商设备封装:20-SSOP 包装:管件 工作温度:-40°C ~ 105°C |
| ADUM6403CRWZ-RL | 功能描述:IC ISOLATOR 4CH DCDC CONV 16SOIC RoHS:是 类别:隔离器 >> 数字隔离器 系列:IsoPower®, iCoupler® 产品培训模块:IsoLoop® Isolator 标准包装:50 系列:IsoLoop® 输入 - 1 侧/2 侧:5/0 通道数:5 电源电压:3 V ~ 5.5 V 电压 - 隔离:2500Vrms 数据速率:110Mbps 传输延迟:12ns 输出类型:CMOS 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 工作温度:-40°C ~ 85°C 其它名称:390-1053-5 |
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