ADM4850ARZ Analog Devices Inc, ADM4850ARZ Datasheet

ADM4850ARZ

Manufacturer Part Number

ADM4850ARZ

Description

115KBps Half Duplex 5V RS485 Trans. I.C.

Manufacturer

Analog Devices Inc

Type

Transceiverr

Datasheet

1.ADM4853ARZ.pdf (16 pages)

Specifications of ADM4850ARZ

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)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

EIA RS-485-/RS-422-compliant

Data rate options

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

APPLICATIONS

Low power RS-485 applications

EMI-sensitive systems

DTE-DCE interfaces

Industrial control

Packet switching

Local area networks

Level translators

GENERAL DESCRIPTION

The ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/

ADM4855/ADM4856/ADM4857 are differential line transceivers

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

RS-422. The ADM4850/ADM4851/ADM4852/ADM4853 are half-

duplex transceivers that share differential lines and have separate

enable inputs for the driver and receiver. The full-duplex

ADM4854/ADM4855/ADM4856/ADM4857 transceivers have

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.

Rev. C

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.

ADM4850/ADM4854: 115 kbps

ADM4851/ADM4855: 500 kbps

ADM4852/ADM4856: 2.5 Mbps

ADM4853/ADM4857: 10 Mbps

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857

Full-Duplex RS-485/RS-422 Transceivers

5 V, Slew-Rate Limited, Half-Duplex and

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

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/ADM4851/ADM4852/ADM4853), and MSOP

(ADM4850 only) packages.

Table 1. Selection Table

Part No.

ADM4850

ADM4851

ADM4852

ADM4853

ADM4854

ADM4855

ADM4856

ADM4857

FUNCTIONAL BLOCK DIAGRAMS

ADM4850/ADM4851/

ADM4852/ADM4853

ADM4854/ADM4855/

Half-/Full-Duplex

Half

Full

ADM4856/ADM4857

Figure 1.

Figure 2.

GND

Data Rate

115 kbps

500 kbps

2.5 Mbps

10 Mbps

115 kbps

500 kbps

2.5 Mbps

10 Mbps

www.analog.com

Related parts for ADM4850ARZ

ADM4850ARZ Summary of contents

Page 1

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 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 ...

Page 2

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagrams ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 ADM4850/ADM4854 Timing Specifications ........................... 4 ADM4851/ADM4855 Timing Specifications ........................... 4 ADM4852/ADM4856 Timing Specifications ........................... ...

Page 3

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 SPECIFICATIONS ± 5 unless otherwise noted MIN MAX Table 2. Parameter DRIVER Differential Output Voltage OD3 ∆|V | for Complementary Output States OD ...

Page 4

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 ADM4850/ADM4854 TIMING SPECIFICATIONS ± 5 unless otherwise noted MIN MAX Table 3. Parameter DRIVER Maximum Data Rate Propagation Delay PLH PHL Skew, t SKEW ...

Page 5

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 ADM4852/ADM4856 TIMING SPECIFICATIONS ± 5 unless otherwise noted MIN MAX Table 5. Parameter DRIVER Maximum Data Rate Propagation Delay PLH PHL Skew, t SKEW ...

Page 6

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 ABSOLUTE MAXIMUM RATINGS Table 7. Parameter V to GND CC Digital I/O Voltage (DE, RE, DI, RO) Driver Output/Receiver Input Voltage Operating Temperature Range Storage Temperature Range θ Thermal Impedance JA SOIC LFCSP MSOP Lead Temperature Soldering (10 sec) ...

Page 7

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS ADM4850 ADM4851 ADM4852/ ADM4853 TOP VIEW (Not to Scale) Figure 3. ADM4850/ADM4851/ADM4852/ADM4853 Pin Configuration, SOIC and MSOP Table 8. ADM4850/ADM4851/ADM4852/ADM4853 Pin Descriptions ...

Page 8

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 TYPICAL PERFORMANCE CHARACTERISTICS 400 ADM4853 350 300 ADM4853 GND 250 200 ADM4850 150 100 ADM4850 GND 50 0 –50 – TEMPERATURE (°C) Figure 6. Unloaded Supply ...

Page 9

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 120 100 0.5 1.0 1.5 2.0 2.5 3.0 3.5 OUTPUT VOLTAGE (V) Figure 12. Output Current vs. Driver Output Low Voltage –10 –30 –50 –70 –90 –110 0 0.5 1.0 1.5 2.0 2.5 ...

Page 10

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 TEST CIRCUITS V OD Figure 18. Driver Voltage Measurement & 60& & ! Figure 19. Driver Voltage Measurement over Common-Mode Voltage Range A R LDIFF B Figure ...

Page 11

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 SWITCHING CHARACTERISTICS 3V 1.5V 1. PLH B 1/ SKEW PLH – PHL 5V 90% POINT 10% POINT Figure 24. Driver Propagation Delay, Rise/Fall Timing A, B ...

Page 12

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 CIRCUIT DESCRIPTION The ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ ADM4855/ADM4856/ADM4857 are high speed RS-485/ RS-422 transceivers offering enhanced performance over industry-standard devices. All devices in the family contain one driver and one receiver, but offer a choice of performance options. The devices feature true ...

Page 13

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 HIGH RECEIVER INPUT IMPEDANCE The input impedance of the ADM4850/ADM4851/ADM4852/ ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 receivers is 96 kΩ, which is eight times higher than the standard RS-485 unit load of 12 kΩ. This 96 kΩ impedance enables a standard driver to drive ...

Page 14

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 OUTLINE DIMENSIONS 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) 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.51 (0.0201) 0.10 0.31 (0.0122) SEATING PLANE COMPLIANT TO ...

Page 15

... Model Temperature Range 1 ADM4850ACPZ-REEL7 −40°C to +85°C ADM4850AR −40°C to +85°C ADM4850ARZ −40°C to +85°C ADM4850ARZ-REEL7 −40°C to +85°C ADM4850ARMZ −40°C to +85°C ADM4850ARMZ-REEL7 −40°C to +85°C ADM4851AR −40°C to +85°C ADM4851AR-REEL7 −40°C to +85°C ADM4851ARZ − ...

Page 16

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857 NOTES ©2004–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04931-0-1/11(C) Rev Page ...

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