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参数资料
| 型号： | IL3685E |
| 厂商： | NVE Corp/Isolation Products |
| 文件页数： | 16/16页 |
| 文件大小： | 0K |
| 描述： | PROFIBUS RS-485 INTERFACE ISO |
| 产品培训模块： | IsoLoop® Isolator |
| 标准包装： | 50 |
| 系列： | IsoLoop® |
| 类型： | 收发器，隔离式 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS485 |
| 电源电压： | 3 V ~ 5.5 V，4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
| 其它名称： | 390-1132 IL3685E-ND Q4618328 |
IL3685
9
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
NVE Corporation
Application Information
Figures 1a and 1b show typical connections to a microcontroller for the narrow-body and wide-body versions. The schematics include typical
termination and fail-safe resistors, and power supply decoupling capacitors:
12
11
VDD2 = 5 V
RFS-EXT
RT
RFS-EXT
220R
390R
VDD1 = 3.3 V
ISODE
GND2
GND1
47nF
Isolation
Boundar
y
IL3685-3
47
nF
10F
+
1
2
15
16
14
B
A
DE
D
R
RE
6
5
3
4
Microcontroller
XDE
10
13
9 GND2X
GND2
I
CNTR-P
Figure 1a. Typical narrow-body connections.
47nF
12
11
VDD2 = 5 V
RFS-EXT
RT
RFS-EXT
220R
390R
VDD1 = 3.3 V
Isolation
Boundar
y
47
nF
10F
+
B
A
DE
D
R
RE
3
4
Microcontroller
CNTR-P
GND2
GND1
IL3685
1
2 or 8
9 or 15
16
10
5
6
ISODE
Figure 1b. Typical wide-body connections.
Receiver Features
The receiver output “R” has tri-state capability via the active low RE input.
Driver Features
The RS-485 driver has a differential output and delivers at least 2.1 V across a 54 load. In addition, unlike most other transceivers, the IL3685
also meets stringent PROFIBUS standards for maximum differential output voltage.
Drivers feature low propagation delay skew to maximize bit width and minimize EMI. Drivers have tri-state capability via the active-high DE
input.
Receiver Data Rate, Cables and Terminations
PROFIBUS Type A bus cable is recommended for high transmission speeds (more than 500 Kbps). Type B should only be used at low baud rates
and low requirements on the network distances. IL3685 transceivers are intended for networks up to 4,000 feet (1,200 m) with Type A bus cable
and proper termination. The maximum data rate decreases as cable length increases.
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