LTC2862AMPS8-1-TRPBF View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

LTC2862AMPS8-1-TRPBF

±60V Fault Protected 3V to 5.5V RS485/RS422 Transceiver with Level 4 IEC ESD

Analog Devices 

TEST CIRCUITS

LTC2862A

±VAB/2

VCM

±VAB/2

A

RECEIVER

B

RO

CL

2862A FO6a

VAB

A–B

–VAB

VCC

RO

0

tSKEWR = |tPLHR – tPHLR|

0

90%

10%

tPLHR

1/2 VCC

tRR

tPHLR

90%

1/2 VCC 10%

tFR

2862A F06b

Figure 6. Receiver Propagation Delay Measurements

0V OR VCC

VCC OR 0V

DI = 0V OR VCC

A

RO

RL

RECEIVER

B

CL

RE

1/2 VCC

2862A FO7a

VCC

RE

0V

1/2 VCC

RO

VOL

VOH

RO

1/2 VCC

tZLR,

tZLSR

1/2 VCC

tLZR

1/4 VCC

1/4 VCC

3/4 VCC

tZHR,

tZHSR

3/4 VCC

tHZR,

tSHDNR

2862A F07b

Figure 7. Receiver Enable/Disable Time Measurements

±VAB /2

VCM

±VAB /2

A

RECEIVER

B

RO

CL

2862A FO8a

0

A–B

–VAB

VCC

RO

0

–200mV

tPFSN, tPFSNS

1/2 VCC

Figure 8. Failsafe Delay Measurements

1/2 VCC

tPFSX, tPFSXS

2862A F08b

For more information www.linear.com/LTC2862A

2862af

11

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