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参数资料
| 型号： | ADM2490EBRWZ |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 通用总线功能 |
| 英文描述： | High Speed, ESD-Protected, Full-Duplex, iCoupler, Isolated RS-485 Transceiver |
| 中文描述： | LINE TRANSCEIVER, PDSO16 |
| 封装： | ROHS COMPLIANT, MS-103AA, SOIC-16 |
| 文件页数： | 13/16页 |
| 文件大小： | 470K |
| 代理商： | ADM2490EBRWZ |
ADM2490E
CIRCUIT DESCRIPTION
ELECTRICAL ISOLATION
In the ADM2490E, electrical isolation is implemented on the
logic side of the interface. Therefore, the part has two main
sections: a digital isolation section and a transceiver section
(see Figure 21). The driver input signal, which is applied to the
TxD pin and referenced to logic ground (GND
1
), is coupled
across an isolation barrier to appear at the transceiver section
referenced to isolated ground (GND
2
). Similarly, the receiver
input, which is referenced to isolated ground in the transceiver
section, is coupled across the isolation barrier to appear at the
RxD pin referenced to logic ground.
i
Coupler Technology
The digital signals are transmitted across the isolation barrier
using
i
Coupler technology. This technique uses chip scale
transformer windings to couple the digital signals magnetically
from one side of the barrier to the other. Digital inputs are
encoded into waveforms that are capable of exciting the
primary transformer winding. At the secondary winding, the
induced waveforms are decoded into the binary value that was
originally transmitted.
Rev. 0 | Page 13 of 16
TRUTH TABLES
The truth tables in this section use the abbreviations shown in
Table 10.
Table 10. Truth Table Abbreviations
Abbreviation
Description
H
High level
I
Indeterminate
L
Low level
X
Irrelevant
Table 11. Transmitting
Supply Status
V
DD1
On
On
Input
TxD
H
L
Outputs
V
DD2
On
On
Y
H
L
Z
L
H
Table 12. Receiving
Supply Status
V
DD1
On
On
On
On
On
Off
Off
Inputs
A B (V)
>0.2
<0.2
0.2 < A B < +0.2
Inputs open
X
X
X
Output
RxD
H
L
I
H
H
H
L
V
DD2
On
On
On
On
Off
On
Off
ISOLATION
BARRIER
V
DD2
V
DD1
Y
Z
A
B
GND
2
GND
1
TxD
RxD
ENCODE
DECODE
DECODE
ENCODE
D
R
TRANSCEIVER
DIGITAL ISOLATION
0
Figure 21. ADM2490E Digital Isolation and Transceiver Sections
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相关代理商/技术参数 |
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|---|---|
| ADM2490EBRWZ-REEL7 | 功能描述:IC TXRX RS-485 HS ESD 16-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:iCoupler® 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ADM2490EBRWZ-REEL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, ESD-Protected, Full-Duplex, iCoupler, Isolated RS-485 Transceiver |
| ADM2491E | 制造商:AD 制造商全称:Analog Devices 功能描述:High Speed, ESD-Protected, Half-/Full-Duplex, iCoupler Isolated RS-485 Transceiver |
| ADM2491EBRWZ | 功能描述:IC TXRX ISO RS-485 HS ESD 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:RS-232 & USB Transceiver 标准包装:2,000 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SSOP（0.209"，5.30mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:296-19849-2 |
| ADM2491EBRWZ | 制造商:Analog Devices 功能描述:IC RS-485 TRANSCEIVER 5.5V SOIC-16 制造商:Analog Devices 功能描述:IC, RS-485 TRANSCEIVER, 5.5V, SOIC-16 |
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