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| 型号： | ADM483EARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC TX/RX RS-485 LO-SLEW 5V 8SOIC |
| 标准包装： | 98 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422，RS485 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
| 产品目录页面： | 790 (CN2011-ZH PDF) |
ADM483E
Rev. A | Page 11 of 16
GENERAL INFORMATION
The ADM483E is a robust RS-485 transceiver that operates
from a single 5 V supply.
It is ideally suited for operation in electrically harsh environ-
ments or where cables may be plugged and unplugged. It is also
immune to high RF field strengths without special shielding
precautions. The ADM483E is intended for balanced data
transmission and complies with both EIA Standards RS-485 and
RS-422. It contains a differential line driver and a differential
line receiver; it is suitable for half-duplex data transmission
because the driver and receiver share the same differential pins.
The input impedance on the ADM483E is 12 kΩ, allowing up to
32 transceivers on the differential bus.
The ADM483E operates from a single 5 V ± 10% power supply.
Excessive power dissipation caused by bus contention or by
output shorting is prevented by a thermal shutdown circuit.
This feature forces the driver output into a high impedance state
if, during fault conditions, a significant temperature increase is
detected in the internal driver circuitry.
The receiver has a fail-safe feature that results in a logic high
output state if the inputs are unconnected (floating).
A high level of robustness is achieved using internal protection
circuitry, eliminating the need for external protection components
such as transorbs or surge suppressors.
Low electromagnetic emissions are achieved using slew limited
drivers, minimizing interference both conducted and radiated.
The ADM483E can transmit at data rates up to 250 kbps.
A typical application for the ADM483E is illustrated in Figure 23.
This figure shows a half-duplex link where data may be
transferred at rates up to 250 kbps. A terminating resistor is
shown at both ends of the link. This termination is not critical
because the slew rate is controlled by the ADM483E and
reflections are minimized.
The communications network can be extended to include
multipoint connections as shown in Figure 26. Up to 32
transceivers can be connected to the bus.
E
3
8
4
M
D
A
E
3
8
4
M
D
A
RS-485/RS-422 LINK
RO
DI
DE
DI
DE
B
A
GND
B
A
GND
RO
0.1F
+5V
VCC
RE
06
01
2-
0
23
Figure 23. Typical Half-Duplex Link Application
receiving.
Table 6. Transmitting Truth Table
Inputs
Outputs
RE
DE
DI
B
A
1
0
1
1
0
1
0
High-Z
1
0
High-Z
1 X = don’t care.
Table 7. Receiving Truth Table
Inputs
Outputs
RE
DE
A B
RO
0
≥ +0.2 V
1
0
≤ 0.2 V
0
Inputs O/C
1
0
High-Z
1 X = don’t care.
ESD TRANSIENT PROTECTION SCHEME
The ADM483E uses protective clamping structures on its inputs
and outputs that clamp the voltage to a safe level and dissipate
the energy present in ESD (electrostatic discharge).
The protection structure achieves ESD protection up to ±15 kV
according to the Human Body Model.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM483EARZ | 制造商:Analog Devices 功能描述:Transceiver IC 制造商:Analog Devices 功能描述:IC, RS485 TRANSCEIVER 250KBPS 5.5V SOIC8 |
| ADM483EARZ-1 | 制造商:Analog Devices 功能描述: |
| ADM483EARZ-REEL | 功能描述:IC TXRX RS485 LO SLEW 5V 8SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:98 系列:* |
| ADM483JR | 制造商:Analog Devices 功能描述:Single Transmitter/Receiver RS-422/RS-485 8-Pin SOIC N |
| ADM483JR-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:5 V Low Power, Slew-Rate Limited RS-485/RS-422 Transceiver |
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