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LTC221 데이터시트(PDF) 5 Page - Linear Technology

부품명 LTC221
상세설명  Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches
PDF  12 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC221 데이터시트(HTML) 5 Page - Linear Technology

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LTC221/LTC222
5
2212fa
Switching Time Test Circuit
Switch output waveform shown for VS = constant with
logic input waveform as shown. Note that VS may be (+)
or (–) as per switching time test circuit. VO is the steady
APPLICATIO S I FOR ATIO
state output switch on. Feedthrough via gate capacitance
may result in spikes at leading and trailing edge of output
waveform.
CCRR-Channel to Channel Crosstalk Test Circuit
Switching Time Test Circuit
Charge Injection Test Circuit
OIRR-Off Isolation Test Circuit
LTC221/222 • AI01
VS
OV
OV
OV
3V
3V
LTC222
LOGIC INPUT
tr < 20ns
tr < 20ns
LTC221
LOGIC INPUT
tr < 20ns
tr < 20ns
SWITCH
INPUT
SWITCH
OUTPUT
50%
50%
VO
0.9
0.9
LOGIC "0" = SW ON
LOGIC "1" = SW ON
VO
tON
tOFF
LTC221/222 • AI02
S1
D1
(REPEAT TEST FOR IN2, IN3 AND IN4)
VO
CL
35pF
RL
1k
RL
RL+ RDS(ON)
VO = VS
IN1
SWITCH
OUTPUT
SWITCH
INPUT
LOGIC
INPUT
VS = 2V
LTC221/222 • AI03
SX
RGEN
VGEN
DX
INX
VO
CL = 1000pF
LTC221/222 • AI04
OV
OV
3V
3V
VO
LTC221 INX
LTC222 INX
∆VO
∆VO IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION.
THE ERROR VOLTAGE IN COULOMBS IS ∆Q = VL • ∆VO
OFF
OFF
ON
ON
ON
ON
LTC221/222 • AI05
VS V+
V–
C
OIRR = 20 LOG
C = 0.001µF//0.1µF
CHIP CAPACITORS
SIGNAL
GENERATOR
C
15V
–15V
VD
GND
VIN
INX
VS
VD
RL
1k
VS = 2VP-P
f = 100kHz
CHAN A
ANALYZER
CHAN B
LTC221/222 • AI06
VS1 V
+
V–
C
OIRR = 20 LOG
C = 0.001µF//0.1µF
CHIP CAPACITORS
SIGNAL
GENERATOR
C
NC
50Ω
15V
–15V
VD2
VS2
VD1
VL
GND
VIN
VIN
IN2
IN1
VS1
VD2
RL
1k
VS = 2Vp-p
f = 100kHz
CHAN A
ANALYZER
CHAN B



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