HA457 datasheet(6/14 Pages) INTERSIL

6 / 14 page

AC Test Circuits

FIGURE 1. -3dB BANDWIDTH (NOTES 7-10)

FIGURE 2. ALL HOSTILE OFF ISOLATION (NOTES 10-12)

FIGURE 3. SINGLE CHANNEL CROSSTALK (NOTES 10, 13-16)

FIGURE 4. ALL HOSTILE CROSSTALK (NOTES 10, 15, 17-19)

NOTES:

7. Program the desired input to output combination (e.g., IN7 to OUT1).

8. Enable the selected output(s).

9. Drive the selected input with VIN, and measure the -3dB frequency at the selected output (VOUT).

10. Load all outputs with the desired RL.

11. Disable all outputs.

12. Drive all inputs with VIN and measure VOUT at any output; Isolation (in dB) = -20log10 (VOUT/VIN).

13. Drive VIN on one input which connects to one output (e.g., IN7 to OUT7).

14. Terminate all other inputs to GND.

15. Enable all outputs.

16. Measure VOUT at any undriven output; Crosstalk (in dB) = 20log10 (VOUT/VIN).

17. Terminate one input to GND, and connect that input to a single output (e.g., IN0 to OUT0).

18. Drive the other seven inputs with VIN, and connect these active inputs to the remaining seven outputs.

19. Measure VOUT at the quiescent output; Crosstalk (in dB) = 20log10 (VOUT/VIN).

IN0

IN1

IN2

IN3

IN4

IN5

IN6

IN7

OUT0

OUT3

OUT4

OUT5

OUT6

OUT7

OUT1

OUT2

VOUT

VIN = 1VP-P, SWEEP FREQUENCY

IN0

IN1

IN2

IN3

IN4

IN5

IN6

IN7

OUT0

OUT3

OUT4

OUT5

OUT6

OUT7

OUT1

OUT2

VIN = 1VP-P, AT 10MHz

VOUT

IN0

IN1

IN2

IN3

IN4

IN5

IN6

IN7

OUT0

OUT3

OUT4

OUT5

OUT6

OUT7

OUT1

OUT2

VIN = 1VP-P, AT 10MHz

VOUT

7 X 75

Ω

IN0

IN1

IN2

IN3

IN4

IN5

IN6

IN7

OUT0

OUT3

OUT4

OUT5

OUT6

OUT7

OUT1

OUT2

VIN = 1VP-P, AT 10MHz

VOUT

Ω

HA457

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