- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄10582 > ADM483ARZ (Analog Devices Inc)IC TXRX RS485/RS422 LP 8SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | ADM483ARZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS485/RS422 LP 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 98 |
| 類(lèi)型： | 收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁(yè)面： | 789 (CN2011-ZH PDF) |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
ADM483
Rev. 0 | Page 11 of 16
APPLICATIONS
DIFFERENTIAL DATA TRANSMISSION
Differential data transmission is used to reliably transmit
data at high rates over long distances and through noisy
environments. Differential transmission nullifies the effects
of ground shifts and noise signals that appear as common-
mode voltages on the line. There are two main standards
approved by the Electronics Industries Association (EIA),
which specify the electrical characteristics of transceivers
used in differential data transmission.
The RS-422 standard specifies data rates up to 10 Mbaud
and line lengths up to 4000 ft. A single driver can drive a
transmission line with up to 10 receivers.
To achieve true multipoint communications, the RS-485
standard was defined. This standard meets or exceeds all the
requirements of RS-422, but also allows up to 32 drivers and 32
receivers to be connected to a single bus. An extended common-
mode range of –7 V to +12 V is defined. The most significant
difference between RS-422 and RS-485 is that the drivers may
be disabled, allowing up to 32 to be connected to a single line.
Only one driver should be enabled at a time, but the RS-485
standard contains additional specifications to guarantee device
safety in the event of line contention.
Table 5. Comparison of RS-422 and RS-485 Interface Standards
Specification
RS-422
RS-485
Transmission Type
Differential
Maximum Cable Length
4000 ft.
Minimum Driver Output Voltage
±2 V
±1.5 V
Driver Load Impedance
100
54
Receiver Input Resistance
4 k min
12 k min
Receiver Input Sensitivity
±200 mV
Receiver Input Voltage Range
–7 V to +7 V
–7 V to +12 V
Drivers/Receivers per Line
1/10
32/32
CABLE AND DATA RATE
The preferred transmission line for RS-485 communications
is a twisted pair. Twisted pair cable tends to cancel common-
mode noise and the magnetic fields generated by the current
flowing through each wire, thereby reducing the effective
inductance of the pair.
The ADM483 is designed for bidirectional data communica-
tions on multipoint transmission lines. A typical application
showing a multipoint transmission network is shown in
. An RS-485 transmission line can have as many as
32 transceivers on the bus. Only one driver can transmit at a
particular time, but multiple receivers can be enabled simul-
taneously. As with any transmission line, it is important to
minimize reflections. This can be done by terminating the
extreme ends of the line by using resistors equal to the char-
acteristic impedance of the line. Stub lengths of the main
line should also be kept as short as possible. A properly
terminated transmission line appears purely resistive to
the driver.
05079-024
RO
RE
DE
DI
D
R
A
B
MAXIMUM NUMBER OF TRANSCEIVERS ON BUS: 32
ADM483
RO
RE
DE
DI
D
R
A
B
ADM483
R
ADM483
D
RO
RE DE
DI
AB
R
ADM483
D
RO
RE DE
DI
AB
Figure 24. Typical Half-Duplex RS-485 Network Topology
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS3102R18-3S | CONN RCPT 2POS BOX MNT W/SCKT |
| MS3102E18-3S | CONN RCPT 2POS BOX MNT W/SCKT |
| MS3102R18-19P | CONN RCPT 10POS BOX MNT W/PINS |
| ISL98001CQZ-210 | IC TRPL VIDEO DIGITIZER 128-MQFP |
| ISL59921IRZ | IC ANLG VID LINE TRPL 20-QFN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADM483E | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:+-15 kV ESD Protected, EMC Compliant Slew Rate Limited, EIA RS-485 Transceiver |
| ADM483EAN | 功能描述:IC TX/RX RS-485 LO-SLEW 5V 8DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類(lèi)型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
| ADM483EANZ | 功能描述:IC TX/RX RS-485 LO-SLEW 5V 8DIP RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:RS-232 & USB Transceiver 標(biāo)準(zhǔn)包裝:2,000 系列:- 類(lèi)型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱(chēng):296-19849-2 |
| ADM483EANZ | 制造商:Analog Devices 功能描述:Transceiver IC |
| ADM483EAR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:TRANSCEIVER IC RS485 3.3V SO8 ((NS)) |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。