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| 型号： | EVAL-ADUM3471EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/36页 |
| 文件大小： | 0K |
| 描述： | EVALUATION MODULE FOR ADUM3471 |
| 标准包装： | 1 |
| 系列： | iCoupler® |
| 主要目的： | 接口，数字式隔离器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADuM3470，ADuM3471，ADuM3472，ADuM3473，ADuM3474 |
| 主要属性： | 2 个独立的 ADuM347x 电路 |
| 次要属性： | 3.3 V ~ 5.5 V 电源 |
| 已供物品： | 板 |
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ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474
Data Sheet
X1 1
*GND 1 2
NC 3
20 V REG
19 GND 2 *
18 V DD2
X2 4
V IA 5
V IB 6
V OC 7
V OD 8
V DDA 9
*GND 1 10
ADuM3472
TOP VIEW
(Not to Scale)
17 FB
16 V OA
15 V OB
14 V IC
13 V ID
12 OC
11 GND 2 *
NOTES
1. NC = NO INTERNAL CONNECTION.
2. PIN 2 AND PIN 10 ARE INTERNALLY CONNECTED TO EACH OTHER; IT IS
RECOMMENDED THAT BOTH PINS BE CONNECTED TO A COMMON GROUND.
PIN 11 AND PIN 19 ARE INTERNALLY CONNECTED TO EACH OTHER; IT IS
RECOMMENDED THAT BOTH PINS BE CONNECTED TO A COMMON GROUND.
Figure 6. ADuM3472 Pin Configuration
Table 14. ADuM3472 Pin Function Descriptions
Pin No.
1
2, 10
3
4
5
6
7
8
9
11, 19
12
13
14
15
16
17
18
20
Mnemonic
X1
GND 1
NC
X2
V IA
V IB
V OC
V OD
V DDA
GND 2
OC
V ID
V IC
V OB
V OA
FB
V DD2
V REG
Description
Transformer Driver Output 1.
Ground Reference for the Primary Side of the Isolator. Pin 2 and Pin 10 are internally connected to each other;
it is recommended that both pins be connected to a common ground.
No Internal Connection.
Transformer Driver Output 2.
Logic Input A.
Logic Input B.
Logic Output C.
Logic Output D.
Supply Voltage for the Primary Side, 3.0 V to 5.5 V. Connect a 0.1 μF bypass capacitor from V DDA to GND 1 .
Ground Reference for the Secondary Side of the Isolator. Pin 11 and Pin 19 are internally connected to each other;
it is recommended that both pins be connected to a common ground.
Oscillator Control Pin. When the OC pin is connected high to the V DD2 pin, the secondary controller runs in open-
loop (unregulated) mode. To regulate the output voltage, connect a resistor between the OC pin and GND 2 ; the
secondary controller runs at a frequency of 200 kHz to 1 MHz, as programmed by the resistor value.
Logic Input D.
Logic Input C.
Logic Output B.
Logic Output A.
Feedback Input from the Secondary Output Voltage, V ISO . Use a resistor divider from the V ISO output to the FB pin
to set the V FB voltage equal to the 1.25 V internal reference level using the formula V ISO = V FB × (R1 + R2)/R2. The
resistor divider is required even in open-loop mode to provide soft start.
Internal Supply Voltage for the Secondary Side Controller and the Side 2 Data Channels. When a sufficient external
voltage is supplied to V REG , the internal regulator regulates the V DD2 pin to 5.0 V. Otherwise, V DD2 should be in the
3.0 V to 5.5 V range. Connect a 0.1 μF bypass capacitor from V DD2 to GND 2 .
Input of the Internal Regulator to Power the Secondary Side Controller and the Side 2 Data Channels. V REG should
be in the 5.5 V to 15 V range to regulate the V DD2 output to 5.0 V.
Rev. A | Page 16 of 36
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