DG417CJ Datasheet, PDF (7/12 Pages) Maxim Integrated Products – Improved, SPST/SPDT Analog Switches

Improved, SPST/SPDT Analog Switches
_____________________________________________________Test Circuits/Timing Diagrams
+3V
LOGIC
INPUT _0V
50%
t_R < 20ns
t_F < 20ns
SWITCH _0V
OUTPUT
t_OFF
V_OUT
0.9 x V_OUT
t_ON
0.9 x V_OUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 2. DG417/DG418 Switching Time
+5V
SWITCH
INPUT
VL
D
IN
+15V
V+
S
DG417
DG418
SWITCH
OUTPUT
V_OUT
R_L
300Ω
C_L
35pF
LOGIC
INPUT
GND
V-
-15V
C_L INCLUDES FIXTURE AND STRAY CAPACITANCE.
( ) ^VOUT ^{= V}D
R_L
R_L + R_DS(ON)
+3V
LOGIC
INPUT _0V
SWITCH ^VOUT1
OUTPUT
t_R < 20ns
50%
t_F < 20ns
t_TRANS
V_OUT2
t_TRANS
0.8 x V_OUT1
0.8 x V_OUT2
Figure 3. DG419 Transition Time
LOGIC
INPUT
+15V
S1 ^V+
S2
IN
GND
+5V
VL
D
DG419
V_OUT
R_L
C_L
1000Ω
35pF
V-
-15V
C_L INCLUDES FIXTURE AND STRAY CAPACITANCE.
_______________________________________________________________________________________ 7