ADM1485

REV. A

–4–

Test Circuits

R

R

Figure 1. Driver Voltage Measurement Test Circuit

60

375

375

Figure 2. Driver Voltage Measurement Test Circuit 2

A

B

Figure 3. Driver Propagation Delay Test Circuit

DE

0V OR 3V

DE IN

A

B

S1

S2

Figure 4. Driver Enable/Disable Test Circuit

RE

A

B

Figure 5. Receiver Propagation Delay Test Circuit

RE

+1.5V

RE IN

S1

S2

–1.5V

Figure 6. Receiver Enable/Disable Test Circuit

Switching Characteristics

3V

0V

B

A

0V

–VO

VO

90% POINT

10% POINT

1/2VO

1.5V

1.5V

90% POINT

10% POINT

VO

Figure 7. Driver Propagation Delay, Rise/Fall Timing

DE

A, B

A, B

1.5V

2.3V

2.3V

1.5V

3V

0V

0V

Figure 8. Driver Enable/Disable Timing

A, B

RO

0V

1.5V

0V

1.5V

Figure 9. Receiver Propagation Delay

RE

R

R

1.5V

1.5V

1.5V

1.5V

3V

0V

O/P LOW

O/P HIGH

0V

Figure 10. Receiver Enable/Disable Timing