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參數(shù)資料
| 型號(hào)： | ADM1487JR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 通用總線功能 |
| 英文描述： | Ultra-Low Power RS-485/RS-422 Transceiver with Low EMI and +/-10kV ESD Protection |
| 中文描述： | LINE TRANSCEIVER, PDSO8 |
| 封裝： | SO-8 |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大小： | 387K |
| 代理商： | ADM1487JR |
PRELIMINARY TECHNICAL DATA
a
Preliminary Technical Data
GENERAL DESCRIPTION
The ADM1487 is an ultra-low power RS-485/RS-422
transceiver consisting of one driver and one receiver per
package. Quiescent operating current is typically 80μA
and 1μA in shutdown mode. The driver and receiver both
have three-state outputs. This allows multiple drivers to be
connected to an RS-485/RS-422 bus, or several receiver
outputs to be connected to a serial data bus. The driver
will maintain a high-impedance output state even with
power off, while the receiver features fail-safe operation
that guarantees a logic high output if the inputs are left
open-circuit.
The device has slew-rate limited drivers to minimize elec-
tromagnetic interference (EMI) and reduce reflections
caused by incorrectly terminated cables.
FEATURES
Low Power - 120μA Max ICC with Driver Disabled
High Input Impedance — Up to 256 Transceivers on Bus
Low-Current (1μA) Shutdown Mode
Slew Rate Control for Error-Free Data
Transmission and Low EMI
±10kV ESD Protection (Human Body Model) on
RS-485 I/O pins
Thermal Protection of Driver
Glitch-Free Driver Power-Up Allows Hot Connection
Driver Maintains High Output Impedance with Power
Off
Wide Common-Mode Range Allows ±7V Ground Differ-
ences Between Devices
Pin-Compatible with Industry Standard 75176
APPLICATIONS
Battery-Powered RS-485/RS-422 Systems
Level Translation
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
8
7
6
5
D
R
RO
DE
DI
V
CC
B
A
GND
ADM1487
–1–
ADM1487
REV. PrC 08/02
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.
One Technology Way, PO. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
Analog Devices, Inc., 2002
Ultra-Low Power RS-485/RS-422 Transceiver
with Low EMI and +/-10kV ESD Protection
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