ISL54047 Datasheet, PDF (6/12 Pages) Intersil Corporation – Ultra Low ON-Resistance, High Off- Isolation, Single Supply, Diff SPST Analog Switch

ISL54047
Test Circuits and Waveforms
V+
LOGIC
INPUT
0V
50%
t_OFF
t_r < 20ns
t_f < 20ns
SWITCH
INPUT
V_NO
SWITCH
OUTPUT _0V
V_OUT
90%
t_ON
90%
Logic input waveform is inverted for switches that have the opposite
logic sense.
V+
C
SWITCH
NO
INPUT
IN
COM
LOGIC
INPUT
GND
V_OUT
R_L
C_L
50Ω 35pF
Repeat test for all switches. C_L includes fixture and stray
capacitance.
V_OUT
=
V _(NO)
------------^R-----^L-------------
R_L + R_(ON)
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
FIGURE 1B. TEST CIRCUIT
V+
C
SWITCH
OUTPUT
V_OUT
LOGIC ^ON
INPUT
ΔV_OUT
OFF
V+
ON
0V
R_G
NO
COM
V_G
GND
IN
LOGIC
INPUT
V_OUT
C_L
Q = ΔV_OUT x C_L
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches.
FIGURE 2B. TEST CIRCUIT
FIGURE 2. CHARGE INJECTION
SIGNAL
GENERATOR
V+
C
NO
R_ON = V₁/100mA
V+
C
NO
ANALYZER
R_L
IN 0V or V+
COM
GND
V_NX
100mA
0V or V+
V₁
IN
COM
GND
Signal direction through switch is reversed, worst case values
are recorded. Repeat test for all switches.
FIGURE 3. OFF ISOLATION TEST CIRCUIT
Repeat test for all switches.
FIGURE 4. R_ON TEST CIRCUIT
6
FN6503.0
May 31, 2007