LTC201A/LTC202/LTC203
Micropower, Low Charge
Injection, Quad CMOS Analog Switches
FEATURES
■
■
■
■
■
■
■
■
■
DESCRIPTIO
Micropower Operation
Single 5V or
±15V
Supply Operation
Low Charge Injection
Low R
ON
Low Leakage
Guaranteed Break Before Make
Latch Resistant Design
TTL/CMOS Compatible
Improved Second Source for DG2O1A/DG202
The LTC
®
201A, LTC202, and LTC203 are micropower,
quad CMOS analog switches which typically dissipate only
250µW from
±15V
supplies and 40µW from a single 5V
supply. The switches have 65Ω typical on resistance
and a very high off resistance. A break-before-make
characteristic, inherent in these switches, prevents the
shorting of two channels. With a supply voltage of
±15V,
the signal range is
±15V.
These switches have special
charge compensation circuitry which greatly reduces
charge injection to a maximum of
±25pC
(±15V supplies).
The LTC201A, LTC202, and LTC203 are designed for
applications such as programmable gain amplifiers,
analog multiplexers, sample-and-hold circuits, precision
charge switching and remote switching. These three
devices are differentiated by the type of switch action, as
shown in the logic table.
, LTC and LT are registered trademarks of Linear Technology Corporation.
KEY SPECIFICATIO S
■
■
■
■
Supply Current ................... I
+
= 40µA, I
–
= 5µA Max
Charge Injection
±15V
Supplies .................................
±25pC
Max
Single 5V Supply .................................. 2pC Typ
R
ON
............................................................. 65Ω Typ
Signal Range ....................................................
±15V
TYPICAL APPLICATIO
V
IN
OV TO 5V
220k*
100Hz TRIM
(240k* TYP)
50k
Micropower 100Hz to 1MHz V-to-F Converter
1.5M
10k
7V TO 10V
100k
12k
1N4148
1µF
47k
2N3906
2N3904
0.01µF
V
DD
CLK CD4024
0.33µF
3pF
74C14
10M
F
OUT
RESET
Q7
V
SS
LINEARITY IS 0.02%
QUIESCENT CURRENT IS 90µA
SUPPLY CURRENT IS 360µA AT 1MHz
*1%FILM RESISTOR
NC
100Ω
1µF
+
1/2 LT
®
1178
–
2k
2µF
S1
S3
V
+
IN2
IN3
IN1
IN4
GND
V
–
S4
LTC201A/LTC202
0.022µF
D1
D3
500pF
POLYSTYRENE
D4
D2
U
+
1/2 LT1178
LT1004-2.5
U
U
–
S2
LTC201A/202/203•TA01
201a23fb
1
LTC201A/LTC202/LTC203
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
IN1
D1
S1
V
–
GND
S4
D4
IN4
1
2
3
4
5
6
7
8
16 IN2BP C
15 D2
14 S2
13 V
+
12 NC
11 S3
10 D3
9
IN3
Voltages Referenced to V
–
V
+
........................................................................ 44V
GND ..................................................................... 25V
Digital Inputs, S, D (Note 2) ....... – 2V to (V
+
+ 2V) or
20mA, Whichever Occurs First
Current
Any Input Except S or D ................................... 30mA
Continuous S or D ............................................ 20mA
Peak S or D (Pulsed at 1ms,
10% Duty Cycle Max) ................................... 70mA
ESD Susceptibility (Note 3) ...................................... 4kV
Power Dissipation (Plastic) ............................... 500mW
Power Dissipation (Ceramic) ............................. 900mW
Operating Temperature Range
LTC201AC/LTC202C/LTC203C ................ 0°C to 70°C
LTC201AM/LTC202M/LTC203M .......–55°C to 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
LTC201ACN
LTC201ACS
LTC202CN
LTC202CS
LTC203CN
LTC203CS
N PACKAGE
16-LEAD PDIP
T
JMAX
= 110°C,
θ
JA
- 120C/W
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 110°C,
θ
JA
- 130C/W
J PACKAGE
16-LEAD CERDIP
T
JMAX
= 150°C,
θ
JA
- 100C/W
LOGIC TABLE
IN
X
0
1
LTC201A
IN1 TO IN4
ON
OFF
LTC202
IN1 TO IN4
OFF
ON
LTC203
IN1, IN4
IN2, IN3
OFF
ON
ON
OFF
ORDER PART
NUMBER
LTC201AMJ
LTC201ACJ
LTC202MJ
LTC202CJ
LTC203MJ
LTC203CJ
OBSOLETE PACKAGE
Consider the N16 or SO-16 Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
+
PARAMETER
Analog Signal Range
R
ON
V
S
=
±10V
I
D
= 1mA
T
MIN
25°C
T
MAX
∆R
ON
vs V
S
∆R
ON
vs Temperature
R
ON
Match
Off Input Leakage I
S
(OFF)
V
S
= 0V, I
DS
= 1mA
V
D
=
±14V,
V
S
=
±14V
Switch Off
●
The
●
denotes the specifications which apply
over full operating temperature range, otherwise specifications are at T
A
= 25°C. V = 15V, V
–
= –15V, GND = 0V.
LTC201AM/LTC202M/
LTC203M
MIN
TYP
MAX
●
CONDITIONS
LTC201AC/LTC202C/
LTC203C
MIN
TYP
MAX
±15
125
65
125
160
20
0.5
5
UNITS
V
Ω
Ω
Ω
%
%/°C
%
±15
110
65
110
160
20
0.5
5
0.01
±1
±100
0.01
±5
±100
201a23fb
2
U
nA
nA
W
U
U
W W
W
U
LTC201A/LTC202/LTC203
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
+
PARAMETER
Off Output Leakage I
D
(0FF)
On Channel Leakage l
D
(ON)
CONDITIONS
V
D
=
±14V,
V
S
=
±14V
Switch Off
V
D
= V
S
=
±14V
Switch On
Input High Voltage V
INH
Input Low Voltage V
INL
Input High or Low Current
I
INH
and I
INL
C
S
(OFF)
C
D
(OFF)
C
D
, C
S
(ON)
I
+
All Logic Inputs Tied Together
V
IN
= 0V or 4.0V
I
–
●
●
●
●
●
●
The
●
denotes the specifications which
apply over full operating temperature range, otherwise specifications are at T
A
= 25°C. V = 15V, V
–
= –15V, GND = 0V.
LTC201AM/LTC202M/
LTC203M
MIN
TYP
MAX
0.01
0.02
±1
±100
±1
±200
2.4
0.8
±1
5
12
30
16
40
60
0.1
5
10
0.1
5
12
30
16
40
60
5
10
2.4
0.8
±1
LTC201AC/LTC202C/
LTC203C
MIN
TYP
MAX
0.01
0.02
±5
±100
±5
±200
AC ELECTRICAL CHARACTERISTICS
V
+
= 15V, V
–
= –15V, GND = 0V unless otherwise noted.
LTC201AM/LTC202M/
LTC203M
MIN
TYP
MAX
290
210
20
V
S
= 2V
P-P
, R
L
= 1kΩ, f 100kHz
R
S
= 0Ω, C
L
= 1000pF, V
S
= 0V
V
S
= 2V
P-P
, R
L
= 10kΩ
85
75
90
5
0.01
±25
400
300
20
LTC201AC/LTC202C/
LTC203C
MIN
TYP
MAX
290
210
85
75
90
8
0.01
±25
400
300
PARAMETER
t
ON
t
OFF
t
OPEN
Off Isolation
Crosstalk
Charge Injection O
INJ
Total Harmonic Distortion THD
U
UNITS
nA
nA
nA
nA
V
V
µA
pF
pF
pF
µA
µA
µA
µA
V
IN
= 15V, 0V
●
CONDITIONS
V
S
= 2V, R
L
= 1kΩ, C
L
= 35pF
UNITS
ns
ns
ns
dB
dB
pC
%
201a23fb
3
LTC201A/LTC202/LTC203
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
+
PARAMETER
Analog Signal Range
R
ON
V
S
=
±1.5V,
+3V
I
D
= 0.25mA
∆R
ON
vs V
S
∆R
ON
vs Temperature
∆R
ON
Match
Off Input Leakage I
S
(OFF)
Off Output Leakage I
D
(0FF)
On Channel Leakage l
D
(ON)
Input High Voltage V
INH
Input Low Voltage V
INL
Input High or Low Current
I
INH
and I
INL
C
S
(OFF)
C
D
(OFF)
C
D
, C
S
(ON)
I
+
All Logic Inputs Tied Together
V
IN
= 0V OR 4.0V
●
The
●
denotes the specifications which
apply over full operating temperature range, otherwise specifications are at T
A
= 25°C. V = 5V, V
–
= GND = 0V unless otherwise noted.
LTC201AM/LTC202M/
LTC203M
MIN
TYP MAX
●
AC ELECTRICAL CHARACTERISTICS
V
+
= 5V, V
–
= GND = 0V unless otherwise noted.
LTC201AM/LTC202M/
LTC203M
MIN
TYP
MAX
450
190
100
V
S
= 2V
P-P
, R
L
= 1kΩ, f = 100Hz
R
S
= 0Ω, C
L
= 1000pF, V
S
= 2.5V
V
S
= 2V
P-P
, R
L
= 10kΩ
250
75
90
2
0.01
600
300
100
LTC201AC/LTC202C/
LTC203C
MIN
TYP
MAX
450
190
250
75
90
2
0.01
600
300
PARAMETER
t
ON
t
OFF
t
OPEN
Off Isolation
Crosstalk
Charge Injection O
INJ
Total Harmonic Distortion THD
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Signals on S, D, or IN exceeding V
+
or V
–
will be clamped by
internal diodes. Limit forward diode current to maximum current rating.
4
U
CONDITIONS
T
MIN
25°C
T
MAX
LTC201AC/LTC202C/
LTC203C
MIN
TYP MAX
UNITS
0
280
20
0.5
5
5
520
525
650
V
Ω
Ω
Ω
%
%/°C
%
±5
±100
0.01
0.01
2.4
+5
±100
±5
±200
0.8
±1
5
12
30
nA
nA
nA
nA
nA
nA
V
V
µA
pF
pF
pF
20
30
µA
µA
0
280
20
0.5
5
450
450
650
V
S
= 2.5V, I
DS
= 0.25mA
V
D
= 4V, 1V; V
S
= 1V, 4V (Note 4)
Switch Off
V
D
= 4V, 1V; V
S
= 1V, 4V (Note 4)
Switch Off
V
D
= V
S
= 1V, 4V (Note 4)
Switch On
●
●
●
●
●
5
0.01
0.01
0.01
2.4
0.8
±1
5
12
30
8
20
30
±1
±100
±1
±100
±1
±200
0.01
V
IN
= 5V, 0V
●
8
CONDITIONS
V
S
= 2V, R
L
= 1kΩ, C
L
= 35pF
UNITS
ns
ns
ns
dB
dB
pC
%
Note 3:
In-circuit ESD on the switch pins (S or D) exceeds 4kV (see test
circuit).
Note 4:
Leakage current with a single 5V supply is guaranteed by
correlation with the
±15V
leakage current.
201a23fb
LTC201A/LTC202/LTC203
TYPICAL PERFOR A CE CHARACTERISTICS
R
ON
vs V
S
Over Supply Voltage
T = 25
°
C
250
I
A
= 1mA
D
V
SUPPLY
= 5V, 0V
200
R
ON
(Ω)
R
ON
(Ω)
R
ON
(Ω)
150
100
±
5V
±
10V
±
15V
50
±
20V
0
– 20 – 16 – 12 – 8 – 4
0 4
V
S
(V)
8
LT201_202_203 • TPC01
Q
INJ
vs V
S
Over Supply Voltage
50
T
A
= 25°C
40 C = 1000p-F
L
30
20
Q
INJ
(pC)
V = – 5V
V
+
= 5V
–
V
+
= 5V
–
V = 0V
I
+
(µA)
10
0
I
+
(µA)
– 10
– 20
– 30
– 40
– 50
– 15
– 10
–5
0
5
10
15
V
+
= 15V
V
–
= – 15V
V
S
(V)
LT201_202_203 • TPC04
U W
R
ON
vs V
S
Over Temperature
100
80
25°C
125°C
R
ON
vs V
S
Over Temperature
V
+
= 5V
500
V
–
= 0V
I
D
= 1mA
400
125°C
60
40
– 55°C
V
+
= 15V
V
–
= – 15V
I
D
= 1mA
300
200
25°C
20
100
0
– 55°C
12 16 20
0
– 15 – 12 – 9 – 6 – 3
0 3
V
S
(V)
6
9
12 15
0
1
2
V
S
(V)
3
4
5
LT201_202_203 • TPC02
LT201_202_203 • TPC03
Positive Supply Current vs Logic
Input Voltage
V
+
= 15V
300
V
–
= – 15V
270
T
A
= 25°C
ALL LOGIC INPUTS
240
TIED TOGETHER
Supply Current vs Logic Input
Voltage
300
270
240
210
180
150
120
90
60
30
V
+
= 5V
V
–
= 0V
T
A
= 25°C
ALL LOGIC INPUTS
TIED TOGETHER
210
180
150
120
90
60
30
0
0
3
6
V
IN
(V)
LT201_202_203 • TPC05
9
12
15
0
0
1
2
V
IN
(V)
3
4
LT201_202_203 • TPC06
5
201a23fb
5
微控制器 MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
