ISL84581 Просмотр технического описания (PDF) - Intersil

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ISL84581

Low-Voltage, Single and Dual Supply, 8-to-1 Multiplexer

Intersil 

ISL84581

Test Circuits and Waveforms (Continued)

3V

LOGIC

INPUT

0V

VNO0

SWITCH

OUTPUT

0V

VNOX

50%

tTRANS

VOUT

tr < 20ns

tf < 20ns

90%

10%

C

V+

V-

C

LOGIC

INPUT

V+

C

V-

C

NO0

NO7

NO1-NO6

COM

ADDA-C GND INH

VOUT

RL

300Ω

CL

35pF

tTRANS

Logic input waveform is inverted for switches that have the opposite

logic sense.

Repeat test for other switches. CL includes fixture and stray

capacitance.

VOUT

=

V(NO or NC)

---------R-----L---------

RL + rON

FIGURE 1C. ADDRESS tTRANS MEASUREMENT POINTS

FIGURE 1D. ADDRESS tTRANS TEST CIRCUIT

FIGURE 1. SWITCHING TIMES

V+

C

V-

C

LOGIC OFF

INPUT

ON

SWITCH

OUTPUT

VOUT

3V

OFF

0V

ΔVOUT

RG

NO

COM

VOUT

0Ω

ADDX

VG

GND INH

CL

LOGIC

1nF

INPUT

Q = ΔVOUT x CL

FIGURE 2A. Q MEASUREMENT POINTS

Repeat test for other switches.

FIGURE 2B. Q TEST CIRCUIT

FIGURE 2. CHARGE INJECTION

3V

LOGIC

INPUT

0V

SWITCH

OUTPUT

VOUT

0V

tr < 20ns

tf < 20ns

tBBM

80%

C

V+

LOGIC

INPUT

V+

C

V-

C

NO0-NO7

ADDA-C

COM

GND INH

VOUT

RL

300Ω

CL

35pF

FIGURE 3A. tBBM MEASUREMENT POINTS

Repeat test for other switches. CL includes fixture and stray

capacitance.

FIGURE 3B. tBBM TEST CIRCUIT

FIGURE 3. BREAK-BEFORE-MAKE TIME

8

FN6416.3

April 13, 2009

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