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| 型号： | LTC485CS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/14页 |
| 文件大小： | 0K |
| 描述： | IC TXRX INTRFC RS485 LOPWR 8SOIC |
| 标准包装： | 100 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS485 |
| 电源电压： | 4.75 V ~ 5.25 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-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1354 (CN2011-ZH PDF) |
LTC485
10
485fk
For more information www.linear.com/LTC485
LTC485 Line Length vs Data Rate
The maximum line length allowable for the RS422/RS485
standard is 4000 feet.
APPLICATIONS INFORMATION
Figures 17 and 18 show that the LTC485 is able to com-
fortably drive 4000 feet of wire at 110kHz.
Figure 14. Line Length Test Circuit
Figure 16. System Differential Voltage at 19.2kHz
Figure 17. System Common Mode Voltage at 110kHz
485 F15
COMMON MODE
VOLTAGE (A + B)/2
RO
DI
485 F16
DIFFERENTIAL
VOLTAGE A – B
RO
DI
485 F17
COMMON MODE
VOLTAGE (A + B)/2
RO
DI
Figure 18. System Differential Voltage at 110kHz
Figure 19. Cable Length vs Maximum Data Rate
485 F18
DIFFERENTIAL
VOLTAGE (A – B)
RO
DI
MAXIMUM DATA RATE
10k
10
CABLE
LENGTH
(FT)
100
1k
10k
100k
1M
10M
485 F19
2.5M
Figure 15. System Common Mode Voltage at 19.2kHz
TTL
OUT
LTC485
NOISE
GENERATOR
100
C
D
4000 FT 26AWG
TWISTED PAIR
A
B
TTL
IN
485 F14
When specifying line length vs maximum data rate the
curve in Figure 19 should be used.
Using the test circuit in Figure 14, Figures 15 and 16 show
that with ~20VP-P common mode noise injected on the
line, the LTC485 is able to reconstruct the data stream at
the end of 4000 feet of twisted pair wire.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC485IN8 | 功能描述:IC TXRX INTERFACE RS485 LP 8DIP RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件 |
| LTC485IN8#PBF | 功能描述:IC TXRX INTRFC RS485 LOPWR 8-DIP 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:121 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS422，RS485 电源电压:3 V ~ 3.6 V 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-DFN（3x3） 包装:管件 |
| LTC485IN8#PBF | 制造商:Linear Technology 功能描述:IC RS-485 TRANSCEIVER 5V DIP-8 制造商:Linear Technology 功能描述:IC, RS-485 TRANSCEIVER, 5V, DIP-8 |
| LTC485IN8 | 制造商:Linear Technology 功能描述:IC TRANSCEIVER RS485 DIP8 485 |
| LTC485IN8PBF | 制造商:Linear Technology 功能描述:RS-485 Driver/Receiver 300uA 5V PDIP8 |
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