ADM483EAR datasheet(4/12 Pages) AD

Part #	ADM483EAR

Description	-15 kV ESD Protected, EMC Compliant Slew Rate Limited, EIA RS-485 Transceiver

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–4–

REV. 0

ADM483E

VOD

VOC

R

Figure 1. Driver Voltage Measurement Test Circuit

VOD3

VTST

60

Ω

375

Ω

375

Ω

Figure 2. Driver Voltage Measurement Test Circuit 2

RL

S1

S2

VCC

CL

VOUT

A

B

0V OR 3V

DE IN

DE

Figure 3. Driver Enable/Disable Test Circuit

RL

S2

VCC

CL

VOUT

RE IN

RE

S1

+15V

–15V

Figure 4. Receiver Enable/Disable Test Circuit

Test Circuits

–VO

VO

1/2VO

0V

3V

1.5V

TPLH

TSKEW

VO

0V

90% POINT

10% POINT

90% POINT

10% POINT

TPHL

B

A

TSKEW

TR

TF

Figure 6. Driver Propagation Delay, Rise/Fall Timing

TPLH

TPHL

0V

1.5V

A–B

RO

VOL

VOH

Figure 8. Receiver Propagation Delay

Switching Characteristics

RLDIFF

CL1

CL2

D

R

RO

RE

A

B

DI

Figure 5. Receiver Propagation Delay Test Circuit

TZH

1.5V

DE

1.5V

3V

0V

2.3V

THZ

VOH

VOH – 0.5V

0V

A, B

VOL+ 0.5V

TZL

2.3V

TLZ

VOL

A, B

Figure 7. Driver Enable/Disable Timing

TZH

1.5V

3V

0V

1.5V

THZ

VOH

VOH – 0.5V

0V

R

VOL+ 0.5V

TZL

1.5V

TLZ

VOL

R

RE

O/P LOW

O/P HIGH

Figure 9. Receiver Enable/Disable Timing

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