8

Test Circuits and Waveforms

FIGURE 1. DC DRIVER TEST CIRCUITS

FIGURE 2A. DIFFERENTIAL TEST CIRCUIT

FIGURE 2B. MEASUREMENT POINTS

FIGURE 2C. SINGLE ENDED TEST CIRCUIT

FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES

D

DE

DI

Z

Y

D

DE

DI

375

Ω

375

Ω

Z

Y

-7V to +12V

D

DE

DI

3V

SIGNAL

GENERATOR

Z

Y

OUT (Y)

3V

0V

1.5V

1.5V

50%

50%

OUT (Z)

50%

50%

DIFF OUT (Y - Z)

90%

90%

10%

10%

DI

50%

50%

D

DE

DI

3V

SIGNAL

GENERATOR

Z

Y

OUT

2

≈1.5V

ISL83483, ISL83485, ISL83488, ISL83490, ISL83491