ADM3491AR-1

ADM3491AR-1 Datasheet

ADM3491-1

Part	Datasheet
ADM3491AR-1	ADM3491AR-1 (pdf)

PDF Datasheet Preview
Data Sheet Operates with V supply EIA RS-422 and RS-485 compliant over full CM range 19 kΩ input impedance Up to 50 transceivers on bus 20 Mbps data rate Short-circuit protection Specified over full temperature range Thermal shutdown Interoperable with 5 V logic 840 uA supply current 2 nA shutdown current Available in PDIP, SOIC, and TSSOP Meets IEC1000-4-4 >1 kV 8 ns skew Upgrade for MAX3491, SN75ALS180 V, Full-Duplex, 840 uA, 20 Mbps, EIA RS-485 Transceiver ADM3491-1 FUNCTIONAL BLOCK DIAGRAM ADM3491-1 05234-001 Figure Telecommunications interface Packet switching Local area networks Data concentration Data multiplexers Integrated services digital network ISDN AppleTalk Industrial controls The ADM3491-1 is a low power, differential line transceiver designed to operate using a single V power supply. Low power consumption, coupled with a shutdown mode, makes it ideal for power-sensitive applications. It is suitable for communication on multipoint bus transmission lines. The ADM3491-1 is intended for balanced data transmission and complies with both Electronic Industries Association EIA Standards RS-485 and RS-422. It contains a differential line driver and a differential line receiver, making it suitable for fullduplex data transfer. The input impedance is 19 kΩ, allowing up to 50 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. This feature forces the driver output into a high impedance state if a significant temperature increase is detected in the internal driver circuitry during fault conditions. If the inputs are unconnected floating , the receiver contains a fail-safe feature that results in a logic high output state. The ADM3491-1 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology. Document Feedback 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 Analog Devices, Inc. All rights reserved. Technical Support ADM3491-1* PRODUCT PAGE QUICK LINKS Last Content Update 02/23/2017 COMPARABLE PARTS View a parametric search of comparable parts. DOCUMENTATION Application Notes • AN-960 RS-485/RS-422 Circuit Implementation Guide Data Sheet • ADM3491-1 V, Full-Duplex, 840 uA, 20 Mbps, EIA RS-485 Transceiver Data Sheet SOFTWARE AND SYSTEMS REQUIREMENTS • RS-232 Transceivers Cross Reference Guide REFERENCE MATERIALS Solutions Bulletins & Brochures • Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4 • Test & Instrumentation Solutions Bulletin, Volume 10, DESIGN RESOURCES • ADM3491-1 Material Declaration • PCN-PDN Information • Quality And Reliability • Symbols and Footprints DISCUSSIONS View all ADM3491-1 EngineerZone Discussions. SAMPLE AND BUY Visit the product page to see pricing options. Data Sheet Typical Performance Characteristics Test Switching Characteristics 10 Theory of Operation 11 Differential Data Transmission 11 Cable and Data 11 Receiver Open-Circuit Fail-Safe Feature 11 Outline Dimensions 12 Ordering Guide 13 0 Initial Version Data Sheet ADM3491-1 SPECIFICATIONS VCC = V ± V. All specifications TMIN to TMAX, unless otherwise noted. Table Parameter DRIVER Differential Output Voltage, VOD for Complementary Output States Common-Mode Output Voltage, VOC for Complementary Output States CMOS Input Logic Threshold Low, VINL CMOS Input Logic Threshold High, VINH Logic Input Current DE, DI, RE Output Leakage Y, Z Current Output Short-Circuit Current RECEIVER Differential Input Threshold Voltage, VTH Input Voltage Hysteresis, Input Resistance Input Current A, B Logic Enable Input Current RE Typ Max Unit ±250 mA Output Voltage Low, VOL Output Voltage High, VOH Short-Circuit Output Current Three-State Output Leakage Current POWER SUPPLY CURRENT ICC VCC − V ±60 mA Supply Current in Shutdown Test Conditions/Comments RL = 100 Ω, VCC > V, see Figure 14 RL = 54 Ω, see Figure 14 RL = 60 Ω, −7 V < VTST < +12 V, see Figure 15 R = 54 Ω or 100 Ω, see Figure 14 R = 54 Ω or 100 Ω, see Figure 14 R = 54 Ω or 100 Ω, see Figure 14 VO = −7 V or +12 V, VCC = 0 V or V VO = −7 V or +12 V −7 V < VCM < +12 V VCM = 0 V −7 V < VCM < +12 V VIN = 12 V VIN = −7 V IOUT = mA IOUT = mA VOUT = GND or VCC = V, 0 V < VOUT < VCC Outputs unloaded DE = VCC, RE = 0 V DE = 0 V, RE = 0 V DE = 0 V, RE = VCC ADM3491-1 TIMING SPECIFICATIONS VCC = V, TA = 25°C, unless otherwise noted. Table Parameter DRIVER Differential Output Delay, TDD Differential Output Transition Time Propagation Delay Input to Output, TPLH, TPHL Driver Output to Output, TSKEW ENABLE/DISABLE Driver Enable to Output Valid Driver Disable Timing Driver Enable from Shutdown RECEIVER Time to Shutdown Propagation Delay Input to Output, TPLH, TPHL Skew, TPLH TPHL Receiver Enable, TEN Receiver Disable, TDEN Receiver Enable from Shutdown Data Sheet ORDERING GUIDE Model1 ADM3491ANZ-1 ADM3491AR-1 ADM3491ARZ-1 ADM3491ARZ-1REEL ADM3491ARZ-1REEL7 ADM3491ARU-1 ADM3491ARU-1REEL ADM3491ARUZ-1 ADM3491ARUZ-1REEL ADM3491ARUZ-1REEL7 1 Z = RoHS Compliant Part. Temperature Range −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C Package Description 14-Lead Plastic DIP 14-Lead Narrow Body Small Outline [SOIC] 14-Lead Narrow Body Small Outline [SOIC] 14-Lead Narrow Body Small Outline [SOIC] 14-Lead Narrow Body Small Outline [SOIC] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] Package Option N-14 R-14 R-14 R-14 R-14 RU-16 RU-16 RU-16 RU-16 RU-16 Ordering Quantity 2,500 1,000 2,500 2,500 1,000 ADM3491-1 NOTES Data Sheet Data Sheet NOTES ADM3491-1 ADM3491-1 NOTES Data Sheet Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05234-0-6/14 C

PDF Datasheet Preview

Data Sheet

Operates with V supply EIA RS-422 and RS-485 compliant over full CM range 19 kΩ input impedance Up to 50 transceivers on bus 20 Mbps data rate Short-circuit protection Specified over full temperature range Thermal shutdown Interoperable with 5 V logic 840 uA supply current 2 nA shutdown current Available in PDIP, SOIC, and TSSOP Meets IEC1000-4-4 >1 kV 8 ns skew Upgrade for MAX3491, SN75ALS180

V, Full-Duplex, 840 uA, 20 Mbps, EIA RS-485 Transceiver

ADM3491-1

FUNCTIONAL BLOCK DIAGRAM

ADM3491-1
05234-001

Figure

Telecommunications interface Packet switching Local area networks Data concentration Data multiplexers Integrated services digital network ISDN AppleTalk Industrial controls

The ADM3491-1 is a low power, differential line transceiver designed to operate using a single V power supply. Low power consumption, coupled with a shutdown mode, makes it ideal for power-sensitive applications. It is suitable for communication on multipoint bus transmission lines.

The ADM3491-1 is intended for balanced data transmission and complies with both Electronic Industries Association EIA Standards RS-485 and RS-422. It contains a differential line driver and a differential line receiver, making it suitable for fullduplex data transfer.

The input impedance is 19 kΩ, allowing up to 50 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. This feature forces the driver output into a high impedance state if a significant temperature increase is detected in the internal driver circuitry during fault conditions.

If the inputs are unconnected floating , the receiver contains a fail-safe feature that results in a logic high output state.

The ADM3491-1 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

Document Feedback

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 Analog Devices, Inc. All rights reserved.

Technical Support

ADM3491-1* PRODUCT PAGE QUICK LINKS

Last Content Update 02/23/2017

COMPARABLE PARTS

View a parametric search of comparable parts.

DOCUMENTATION

Application Notes
• AN-960 RS-485/RS-422 Circuit Implementation Guide Data Sheet
• ADM3491-1 V, Full-Duplex, 840 uA, 20 Mbps, EIA

RS-485 Transceiver Data Sheet

SOFTWARE AND SYSTEMS REQUIREMENTS
• RS-232 Transceivers Cross Reference Guide

REFERENCE MATERIALS

Solutions Bulletins & Brochures
• Emerging Energy Applications Solutions Bulletin, Volume
10, Issue 4
• Test & Instrumentation Solutions Bulletin, Volume 10,

DESIGN RESOURCES
• ADM3491-1 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints

DISCUSSIONS

View all ADM3491-1 EngineerZone Discussions.

SAMPLE AND BUY

Visit the product page to see pricing options.
Data Sheet

Typical Performance Characteristics Test Switching Characteristics 10 Theory of Operation 11
Differential Data Transmission 11 Cable and Data 11 Receiver Open-Circuit Fail-Safe Feature 11 Outline Dimensions 12 Ordering Guide 13
0 Initial Version

Data Sheet

ADM3491-1

SPECIFICATIONS

VCC = V ± V. All specifications TMIN to TMAX, unless otherwise noted.

Table

Parameter

DRIVER

Differential Output Voltage, VOD
for Complementary Output States

Common-Mode Output Voltage, VOC
for Complementary Output States

CMOS Input Logic Threshold Low, VINL

CMOS Input Logic Threshold High, VINH

Logic Input Current DE, DI, RE

Output Leakage Y, Z Current

Output Short-Circuit Current

RECEIVER

Differential Input Threshold Voltage, VTH

Input Voltage Hysteresis,

Input Resistance

Input Current A, B

Logic Enable Input Current RE

Typ Max Unit
±250 mA

Output Voltage Low, VOL Output Voltage High, VOH Short-Circuit Output Current Three-State Output Leakage Current POWER SUPPLY CURRENT ICC

VCC − V
±60 mA

Supply Current in Shutdown

Test Conditions/Comments

RL = 100 Ω, VCC > V, see Figure 14 RL = 54 Ω, see Figure 14 RL = 60 Ω, −7 V < VTST < +12 V, see Figure 15 R = 54 Ω or 100 Ω, see Figure 14 R = 54 Ω or 100 Ω, see Figure 14 R = 54 Ω or 100 Ω, see Figure 14

VO = −7 V or +12 V, VCC = 0 V or V VO = −7 V or +12 V
−7 V < VCM < +12 V VCM = 0 V −7 V < VCM < +12 V VIN = 12 V VIN = −7 V

IOUT = mA IOUT = mA VOUT = GND or VCC = V, 0 V < VOUT < VCC

Outputs unloaded DE = VCC, RE = 0 V DE = 0 V, RE = 0 V DE = 0 V, RE = VCC

ADM3491-1

TIMING SPECIFICATIONS

VCC = V, TA = 25°C, unless otherwise noted.

Table Parameter DRIVER

Differential Output Delay, TDD Differential Output Transition Time Propagation Delay Input to Output, TPLH, TPHL Driver Output to Output, TSKEW ENABLE/DISABLE Driver Enable to Output Valid Driver Disable Timing Driver Enable from Shutdown RECEIVER Time to Shutdown Propagation Delay Input to Output, TPLH, TPHL Skew, TPLH TPHL Receiver Enable, TEN Receiver Disable, TDEN Receiver Enable from Shutdown

Data Sheet
ORDERING GUIDE

Model1 ADM3491ANZ-1 ADM3491AR-1 ADM3491ARZ-1 ADM3491ARZ-1REEL ADM3491ARZ-1REEL7 ADM3491ARU-1 ADM3491ARU-1REEL ADM3491ARUZ-1 ADM3491ARUZ-1REEL ADM3491ARUZ-1REEL7
1 Z = RoHS Compliant Part.

Temperature Range −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C

Package Description 14-Lead Plastic DIP 14-Lead Narrow Body Small Outline [SOIC] 14-Lead Narrow Body Small Outline [SOIC] 14-Lead Narrow Body Small Outline [SOIC] 14-Lead Narrow Body Small Outline [SOIC] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP] 16-Lead Thin Shrink Small Outline [TSSOP]

Package Option N-14 R-14 R-14 R-14 R-14 RU-16 RU-16 RU-16 RU-16 RU-16
Ordering Quantity
2,500 1,000 2,500 2,500 1,000

ADM3491-1 NOTES

Data Sheet

Data Sheet NOTES

ADM3491-1

ADM3491-1 NOTES

Data Sheet

Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.

D05234-0-6/14 C

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ADM3491AR-1 Datasheet file may be downloaded here without warranties.

Datasheet ID: ADM3491AR-1 517834