ISL43840_14 Datasheet, PDF (8/14 Pages) Intersil Corporation – Low-Voltage, Single and Dual Supply,Dual 4 to 1 Multiplexer Analog Switch with Enable

ISL43840
Test Circuits and Waveforms
3V
LOGIC
INPUT
0V
50%
t_ON
VNO0
SWITCH
OUTPUT _0V
t_OFF
90% ^VOUT
t_r < 20ns
t_f < 20ns
90%
C
V+
LOGIC
INPUT
V+
C
V-
C
NO0
NO1-NO3
COM
ENABLE
GND
ADD1, 2
V_OUT
R_L
300Ω
C_L
35pF
Logic input waveform is inverted for switches that have the opposite
logic sense.
FIGURE 1A. ENABLE t_ON / t_OFF MEASUREMENT POINTS
Repeat test for other switches. C_L includes fixture and stray
capacitance.
V_OUT = V(NO) _R-----_L----+---^R--_R---^L--₍--_O-----_N----₎
FIGURE 1B. ENABLE t_ON / t_OFF TEST CIRCUIT
3V
LOGIC
INPUT
0V
50%
t_TRANS
t_r < 20ns
t_f < 20ns
VNO0
SWITCH
OUTPUT
0V
VNO_X
V_OUT
10%
90%
t_TRANS
Logic input waveform is inverted for switches that have the opposite
logic sense.
V+
V-
C
C
C
V+
V-
C
LOGIC
INPUT
NO0
NO3
NO1-NO2
COM
ADD1, 2 _{GND ENABLE}
V_OUT
R_L
300Ω
C_L
35pF
Repeat test for other switches. C_L includes fixture and stray
capacitance.
V_OUT = V(NO) _R-----_L----+---^R--_R---^L--₍--_O-----_N----₎
FIGURE 1C. ADDRESS t_TRANS MEASUREMENT POINTS
FIGURE 1D. ADDRESS t_TRANS TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
V+
C
V-
C
LOGIC ^OFF
INPUT
ON
SWITCH
OUTPUT
V_OUT
3V
OFF
0V
∆V_OUT
R_G
NOX
0Ω
COMX
ADDX
V_G
GND ENABLE
LOGIC
INPUT
Q = ∆V_OUT x C_L
Repeat test for other switches.
FIGURE 2A. Q MEASUREMENT POINTS
FIGURE 2B. Q TEST CIRCUIT
FIGURE 2. CHARGE INJECTION
V_OUT
C_L
1nF
8
FN6056.2
March 13, 2006