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| 型号： | ADM4857ARZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/422 10MBPS 8SOIC |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422，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-SO |
| 包装： | 带卷 (TR) |
5 V, Slew-Rate Limited, Half-Duplex and
Full-Duplex RS-485/RS-422 Transceivers
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2004–2012 Analog Devices, Inc. All rights reserved.
FEATURES
EIA RS-485-/RS-422-compliant
Data rate options
ADM4850/ADM4854: 115 kbps
ADM4851/ADM4855: 500 kbps
ADM4852/ADM4856: 2.5 Mbps
ADM4853/ADM4857: 10 Mbps
Half- and full-duplex options
Reduced slew rates for low EMI
True fail-safe receiver inputs
5 μA (maximum) supply current in shutdown mode
Up to 256 transceivers on one bus
Outputs high-Z when disabled or powered off
7 V to +12 V bus common-mode range
Thermal shutdown and short-circuit protection
Pin-compatible with the MAX308x
Specified over the 40°C to +85°C temperature range
Available in 8-lead SOIC, LFCSP, and MSOP packages
Qualified for automotive applications
APPLICATIONS
Low power RS-485 applications
EMI-sensitive systems
DTE-DCE interfaces
Industrial control
Packet switching
Local area networks
Level translators
FUNCTIONAL BLOCK DIAGRAMS
04
93
1-
00
1
RO
RE
R
DE
DI
D
A
B
GND
VCC
ADM4850/ADM4851/
ADM4852/ADM4853
Figure 1.
04
93
1-
02
8
RO
R
A
B
DI
D
Z
Y
GND
VCC
ADM4854/ADM4855/
ADM4856/ADM4857
Figure 2.
GENERAL DESCRIPTION
suitable for high speed half- and full-duplex data communication on
multipoint bus transmission lines. They are designed for balanced
data transmission and comply with EIA Standards RS-485 and
duplex transceivers that share differential lines and have separate
enable inputs for the driver and receiver. The full-duplex
dedicated differential line driver outputs and receiver inputs.
The parts have a 1/8-unit-load receiver input impedance, which
allows up to 256 transceivers on one bus. Because only one driver
should be enabled at any time, the output of a disabled or pow-
ered-down driver is three-stated to avoid overloading the bus.
The receiver inputs have a true fail-safe feature, which ensures
a logic high output level when the inputs are open or shorted.
This guarantees that the receiver outputs are in a known state
before communication begins and when communication ends.
The driver outputs are slew-rate limited to reduce EMI and data
errors caused by reflections from improperly terminated buses.
Excessive power dissipation caused by bus contention or by output
shorting is prevented with a thermal shutdown circuit.
The parts are fully specified over the commercial and industrial
temperature ranges and are available in 8-lead SOIC, LFCSP
(ADM4850 only) packages.
Table 1. Selection Table
Part No.
Half-/Full-Duplex
Data Rate
Half
115 kbps
Half
500 kbps
Half
2.5 Mbps
Half
10 Mbps
Full
115 kbps
Full
500 kbps
Full
2.5 Mbps
Full
10 Mbps
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM485AN | 功能描述:IC TX/RX SINGLE RS-485 5V 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 |
| ADM485ANZ | 功能描述:IC TX/RX SINGLE RS-485 5V 8DIP 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:* |
| ADM485ANZ | 制造商:Analog Devices 功能描述:RS-485 IC |
| ADM485ANZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Meets EIA RS-485 standard |
| ADM485AQ | 制造商:Rochester Electronics LLC 功能描述:RS-485 I/F TRANSCEIVER - Bulk |
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