ADM485JRZ Analog Devices Inc, ADM485JRZ Datasheet

IC TX/RX SINGLE RS-485 5V 8SOIC

ADM485JRZ

Manufacturer Part Number
ADM485JRZ
Description
IC TX/RX SINGLE RS-485 5V 8SOIC
Manufacturer
Analog Devices Inc
Type
Transceiverr
Datasheet

Specifications of ADM485JRZ

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Device Type
Differential Line Transceiver
Ic Interface Type
RS485
No. Of Drivers
32
Supply Voltage Range
4.75V To 5.25V
Driver Case Style
SOIC
No. Of Pins
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADM485JRZ
Manufacturer:
AVAGO
Quantity:
10 000
Part Number:
ADM485JRZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADM485JRZ-REEL
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADM485JRZ-REEL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Meets EIA RS-485 standard
5 Mbps 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
Driver propagation delay: 10 ns typical
Receiver propagation delay: 15 ns typical
High-Z outputs with power off
Superior upgrade for LTC485
APPLICATIONS
Low power RS-485 systems
DTE/DCE interface
Packet switching
Local area networks (LNAs)
Data concentration
Data multiplexers
Integrated services digital network (ISDN)
GENERAL 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 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 can be enabled independently.
When disabled, the outputs are three-stated.
The ADM485 operates from a single 5 V power supply.
Excessive power dissipation caused by bus contention or by
output shorting is prevented by a thermal shutdown circuit. If
during fault conditions, a significant temperature increase is
detected in the internal driver circuitry, this feature forces the
driver output into a high impedance state.
Up to 32 transceivers can be connected simultaneously on a
bus, but only one driver should be enabled at any time. It is
important, therefore, that the remaining disabled drivers do not
load the bus. To ensure this, the ADM485 driver features high
output impedance when disabled and when powered down,
which minimizes the loading effect when the transceiver is not
being used. The high impedance driver output is maintained
over the common-mode voltage range of −7 V to +12 V.
Rev. F
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The receiver contains a fail-safe feature that 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 Mbps while low skew minimizes EMI interference.
The part is fully specified over the commercial and industrial
temperature range and is available in 8-lead PDIP, 8-lead SOIC,
and small footprint, 8-lead MSOP packages.
FUNCTIONAL BLOCK DIAGRAM
EIA RS-485 Transceiver
RO
RE
DE
DI
©1993–2008 Analog Devices, Inc. All rights reserved.
1
2
3
4
ADM485
D
Figure 1.
R
5 V Low Power
8
7
6
5
V
B
A
GND
CC
ADM485
www.analog.com

Related parts for ADM485JRZ

ADM485JRZ Summary of contents

Page 1

FEATURES Meets EIA RS-485 standard 5 Mbps data rate Single 5 V supply – +12 V bus common-mode range High speed, low power BiCMOS Thermal shutdown protection Short-circuit protection Driver propagation delay typical Receiver propagation delay: ...

Page 2

ADM485 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 4 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. ...

Page 3

SPECIFICATIONS ± 5%, all specifications MIN Table 1. Parameter DRIVER Differential Output Voltage OD3 Δ|V | for Complementary Output States OD Common-Mode Output Voltage Δ|V | for ...

Page 4

ADM485 TIMING SPECIFICATIONS ± 5%, all specifications MIN Table 2. Parameter DRIVER Propagation Delay Input to Output, t PLH Driver Output to OUTPUT, t SKEW Driver Rise/Fall Time ...

Page 5

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V CC Inputs Driver Input (DI) Control Inputs (DE, RE) Receiver Inputs (A, B) Outputs Driver Outputs (A, B) Receiver Output Power Dissipation 8-Lead MSOP θ , ...

Page 6

ADM485 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 6. Pin Function Descriptions Pin No. Mnemonic Function 1 RO Receiver Output. When enabled greater than B by 200 mV high less than B by ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 0.25 0.50 0.75 1.00 1.25 RECEIVER OUTPUT LOW VOLTAGE (V) Figure 3. Output Current vs. Receiver Output Low Voltage 0 –2 –4 –6 –8 –10 ...

Page 8

ADM485 100 0.5 1.0 1.5 2.0 2.5 DRIVER OUTPUT LOW VOLTAGE (V) Figure 9. Output Current vs. Driver Output Low Voltage 0 –10 –20 –30 –40 –50 –60 –70 ...

Page 9

T 1 CH1 1.00VΩ CH2 1.00VΩ M5.00ns W W Figure 15. Unloaded Driver Differential Outputs 1 CH1 1.00VΩ CH2 500mVΩ M5.00ns W W Figure 16. Loaded Driver Differential Outputs CH1 ...

Page 10

ADM485 TEST CIRCUITS V OD Figure 20. Driver Voltage Measurement 375Ω V 60Ω OD3 375Ω Figure 21. Driver Voltage Measurement A R LDIFF B Figure 22. Driver Propagation Delay TST Rev. ...

Page 11

SWITCHING CHARACTERISTICS 3V 1. PLH B 1/ – SKEW PLH PHL +V O 90% POINT 0V 10% POINT – Figure 26. Driver Propagation Delay, Rise/Fall Timing DE ...

Page 12

ADM485 APPLICATIONS INFORMATION 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 ...

Page 13

OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 8° 0° 0.51 (0.0201) 0.10 0.31 (0.0122) 0.25 (0.0098) SEATING ...

Page 14

... ADM485JR-REEL 0°C to 70°C ADM485JR-REEL7 0°C to 70°C 1 ADM485JRZ 0°C to 70°C 1 ADM485JRZ-REEL 0°C to 70°C 1 ADM485JRZ-REEL7 0°C to 70° RoHS Compliant Part, # denotes RoHS compliant product may be top or bottom marked. 0.400 (10.16) 0.365 (9.27) 0.355 (9.02 0.280 (7.11) 0.250 (6.35 ...

Page 15

NOTES Rev Page ADM485 ...

Page 16

ADM485 NOTES ©1993–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00078-0-4/08(F) Rev Page ...

Related keywords