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參數資料
| 型號： | ADM485AN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | +5 V Low Power EIA RS-485 Transceiver |
| 中文描述： | LINE TRANSCEIVER, PDIP8 |
| 封裝： | MO-095AA, PLASTIC, DIP-8 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 133K |
| 代理商： | ADM485AN |
FUNCTIONAL BLOCK DIAGRAM
R
A
B
DI
DE
RE
RO
ADM485
D
2
3
4
5
6
7
8
1
V
CC
GND
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
+5 V Low Power
EIA RS-485 Transceiver
ADM485
FEATURES
Meets EIA RS-485 Standard
5 Mb/s Data Rate
Single +5 V Supply
–7 V to +12 V Bus Common-Mode Range
High Speed, Low Power BiCMOS
Thermal Shutdown Protection
Short Circuit Protection
Zero Skew Driver
Driver Propagation Delay: 10 ns
Receiver Propagation Delay: 25 ns
High Z Outputs with Power Off
Superior Upgrade for LTC485
APPLICATIONS
Low Power RS-485 Systems
DTE-DCE Interface
Packet Switching
Local Area Networks
Data Concentration
Data Multiplexers
Integrated Services Digital Network (ISDN)
PRODUCT DESCRIPTION
The ADM485 is a differential line transceiver suitable for high
speed bidirectional data communication on multipoint bus
transmission lines. It is designed for balanced data transmission
and complies with both EIA Standards RS-485 and RS-422.
The part contains a differential line driver and a differential line
receiver. Both the driver and the receiver may be enabled inde-
pendently. When disabled, the outputs are tristated.
The ADM485 operates from a single +5 V power supply.
Excessive power dissipation caused by bus contention or by out-
put 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.
Up to 32 transceivers may be connected simultaneously on a
bus, but only one driver should be enabled at any time. It is im-
portant, therefore, that the remaining disabled drivers do not
load the bus. To ensure this, the ADM485 driver features high
output impedance when disabled and also when powered down.
This minimizes the loading effect when the transceiver is not
being utilized. The high impedance driver output is maintained
over the entire common-mode voltage range from –7 V to +12 V.
The receiver contains a fail safe feature which results in a logic
high output state if the inputs are unconnected (floating).
The ADM485 is fabricated on BiCMOS, an advanced mixed
technology process combining low power CMOS with fast
switching bipolar technology. All inputs and outputs contain
protection against ESD; all driver outputs feature high source
and sink current capability. An epitaxial layer is used to guard
against latch-up.
The ADM485 features extremely fast switching speeds. Minimal
driver propagation delays permit transmission at data rates up to
5 Mbits/s while low skew minimizes EMI interference.
The part is fully specified over the commercial and industrial
temperature range and is available in an 8-lead DIL/SOIC package.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2000
相關PDF資料 |
PDF描述 |
|---|---|
| ADM485AQ | TRANSISTOR, NFET, 7002, SOT-23 |
| ADM485AR | +5 V Low Power EIA RS-485 Transceiver |
| ADM485JN | +5 V Low Power EIA RS-485 Transceiver |
| ADM485JR | +5 V Low Power EIA RS-485 Transceiver |
| ADM489AN | Full-Duplex, Low Power, Slew Rate Limited, EIA RS-485 Transceivers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM485ANZ | 功能描述:IC TX/RX SINGLE RS-485 5V 8DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發器 系列:- 標準包裝:98 系列:* |
| ADM485ANZ | 制造商:Analog Devices 功能描述:RS-485 IC |
| ADM485ANZ1 | 制造商:AD 制造商全稱: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 |
| ADM485AR | 功能描述:IC TX/RX SINGLE RS-485 5V 8SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發器 系列:- 標準包裝:121 系列:- 類型:收發器 驅動器/接收器數:1/1 規程:RS422，RS485 電源電壓:3 V ~ 3.6 V 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應商設備封裝:10-DFN（3x3） 包裝:管件 |
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