Datasheet

LTC201A/LTC202/LTC203
6
201a23fb
Switching Time Test Circuit
Switch output waveform shown for V
S
= constant with
logic input waveform as shown. Note that V
S
may be + or
– as per switching time test circuit. V
O
is the steady state
output switch on. Feedthrough via gate capacitance may
result in spikes at leading and trailing edge of output
waveform.
Charge Injection Test Circuit
R
GEN
V
GEN
V
O
S
X
D
X
IN
X
C
L
=
1000pF
LT201_202_203 • AI03
3V
3V
NC
NO
ON
ON
ON
ON
OFF
OFF
0V
V
O
∆ V
O
∆ V
O
IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION.
THE ERROR VOLTAGE IN COULOMBS IS ∆Q = C
L
• ∆V
O
0V
LT201_202_203 • AI04
Switching Time Test Circuit
LT201_202_203 • AI01
3V
50%
50%
0V
0.9 0.9
3V
0V
V
S
V
O
V
O
t
ON
t
OFF
0V
NO
LOGIC INPUT
t
r
< 20ns
t
f
< 20ns
NC
LOGIC INPUT
t
r
< 20ns
t
f
< 20ns
SWITCH
INPUT
SWITCH
OUTPUT
LOGIC “1” = SW ON
LOGIC “0” = SW ON
LT201_202_203 • AI02
V
S
= 2V
V
O
V
O
R
L
R
L
R
L
C
L
S1
D1
IN1
LOGIC
INPUT
SWITCH
INPUT
SWITCH
OUTPUT
(REPEAT TEST FOR IN2, IN3 AND IN4)
1kΩ
35pF
= V
S
+ r
DS(ON)
APPLICATIO S I FOR ATIO
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