LTC221/LTC222
1
2212fa
Micropower Operation
Single 5V or 15V Supply Operation
Low Charge Injection
Low R
ON
Low Leakage
Guaranteed Break Before Make
Latch Resistant Design
TLL/CMOS Compatible
Improved Second Source for DG221/DG222
Microprocessor Bus Compatible
The LTC
221 and LTC222 are micropower, quad CMOS
analog switches which typically dissipate only 250W
from 15V supplies and 40W from a single 5V supply.
Onboard latches allow the LTC221 and LTC222 to inter-
face directly to most microprocessor buses. The switches
have 65 typical on resistance and a very high off resis-
tance. A break before make characteristic is inherent in
these switches to prevent the shorting of two channels.
The signal range is 15V with a supply voltage of 15V and
0V to 5V with a single 5V supply. The switches have special
charge compensation circuitry which greatly reduces
charge injection to a maximum of 25pC (15V supplies).
The LTC221 and LTC222 are designed for applications
such as microprocessor controlled programmable gain
amplifiers, automatic test equipment, communication
systems, and data acquisition systems. The LTC221 is
normally closed and the LTC222 is normally open as
shown in the Logic Table.
Micropower, Low Charge
Injection, Quad CMOS Analog
Switches with Data Latches
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
U
Supply Current ..................... I
+
= 40A, I
= 5A Max
Charge Injection
15V Supplies ................................. 25pC Max
Single 5V Supply .................................. 2pC Typ
R
ON
............................................................... 65Typ
Signal Range ..................................................... 15V
Two-Channel, 12-Bit, Self Calibrating Data Acquisition System
KEY SPECIFICATIO S
U
LTC221/222 TA01
5V
R1
15V
IN
IN
10k
150k
100k
120
270
GND
IN3
IN4
WR
WR
TO MICROPROCESSOR
e.g. TMS320C25
IN2
IN1
CS
D
OUT
V
REF
V
FS
CLK
GND
D1
S1
D2
S2
V
IN
OV TO 5V
V
FS
D3
S3
D4
S4
5V
V
+
V
15V
15V
LTC221/LTC222
LT1006
+
LOGIC
DECODER
LTC1292
12-BIT
ADC
SERIAL PORT
DATA BUS B0 B3
ADDRESS BUS
LT1027
TYPICAL APPLICATIO
U
LTC221/LTC222
2
2212fa
TOP VIEW
J PACKAGE
16-LEAD CERDIP
N PACKAGE
16-LEAD PDIP
J
MAX
= 110
C,
JA
= 120
C/W
S PACKAGE
16-LEAD PLASTIC SO
J
MAX
= 110
C,
JA
= 130
C/W
ORDER PART
NUMBER
LTC221CN
LTC221CS
LTC222CN
LTC222CS
LTC221MJ
LTC221CJ
LTC222MJ
LTC222CJ
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN1
D1
S1
V
GND
S4
D4
IN4
IN2
D2
S2
V
+
WR
S3
D3
IN3
LTC221M/LTC222M
LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Analog Signal Range
15
15
V
R
ON
V
S
= 10V
T
MIN
90
90
I
D
= 1mA
25C
65
90
65
90
T
MAX
135
135
Off Input Leakage I
S
(OFF)
V
D
= 14V, V
S
= 14V
0.01
1
0.01
5
nA
100
100
nA
Off Output Leakage I
D
(0FF)
V
IN
= 2.4V, LTC221
0.01
1
0.01
5
nA
V
IN
= 0.8V, LTC222
100
100
nA
On Channel Leakage l
D
(ON)
V
D
= V
S
= 14V, V
IN
= 2.4V, LTC222
0.02
1
0.02
5
nA
V
IN
= 0.8V, LTC221
200
200
nA
Input High Voltage V
INH
, V
WRH
2.4
2.4
V
Input Low Voltage V
INL
, V
WRL
0.8
0.8
V
Input High or Low Current
V
IN
= 15V, 0V
1
1
A
I
INH
, I
INL
, I
WRH
,
I
WRL
V
WR
= 15V, 0V
C
S
(OFF)
5
5
pF
C
D
(OFF)
12
12
pF
C
D
, C
S
(ON)
30
30
pF
I
+
All Channels On or Off
16
40
16
40
A
V
IN
= V
WR
= 0V or 4.0V
60
60
A
Voltages Referenced to V
V
+ ...........................................................................................
44V
GND ..................................................................... 25V
Digital Inputs, S, D (Note 2) .......... 2V to (V
+
2V) or
Digital Inputs, S, D (N20
20mA, Whichever Occurs First
Current
Any Input Except S or D ................................... 30mA
Continuous S or D ............................................ 20mA
Peak S or D
(Pulsed at 1 ms, 10% Duty Cycle Max) ......... 70mA
ESD Susceptibility (Note 3) ...................................... 4kV
Power Dissipation (Plastic) ............................... 500mW
Power Dissipation (Ceramic) ............................. 900mW
Operating Temperature Range
LTC221C/LTC222C .................................. 0C to 70C
LTC221M/LTC222M (OBSOLETE).......55C to 125C
Storage Temperature Range ................. 65C to 150C
Lead Temperature (Soldering, 10 sec).................. 300C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
(Note 1)
ABSOLUTE AXI U RATI GS
W
W
W
U
PACKAGE/ORDER I FOR ATIO
U
U
W
INX
WR
LTC221
LTC222
0
0
On
Off
1
0
Off
On
X
1
Maintain Previous State
Maintain Previous State
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
U
LOGIC TABLE
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, unless noted.
OBSOLETE PACKAGE
Consider the N or S Package for Alternate Source
LTC221/LTC222
3
2212fa
V
+
= 15V, V
= 15V, GND = 0V, unless otherwise noted.
LTC221M/LTC222M LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
t
ON
V
S
= 2V, R
L
= 1k, C
L
= 35pF
290
400
290
400
ns
t
OFF
210
300
210
300
t
OPEN
20
85
20
85
ns
Off Isolation
V
S
= 2Vp-p, R
L
= 1k
75
75
dB
Crosstalk
f = 100kHz
90
90
Charge Injection O
INJ
R
GEN
= 0, C
L
= 1000pF, V
GEN
= 0
5
25
8
25
pC
Total Harmonic Distortion THD
V
S
= 2Vp-p, R
L
= 10k
0.01
0.01
%
t
ON
, WR
V
S
= 2V, R
L
= 1k, C
L
= 35pF
270
400
270
400
ns
t
OFF
, WR
160
300
160
300
LTC221M/LTC222M LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
I
0.1
5
0.1
5
A
10
10
LTC221M/LTC222M LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Analog Signal Range
0
5
0
5
V
R
ON
V
S
= 1.5V, 3V
T
MIN
450
520
I
D
= 0.25mA
25C
280
450
280
520
T
MAX
650
650
Off Input Leakage I
S
(OFF)
V
D
= 4V, 1V; V
S
= 1V, 4V
0.01
1
0.01
5
nA
(Note 4)
100
100
nA
Off Output Leakage I
D
(0FF)
0.01
1
0.01
5
nA
100
100
nA
On Channel Leakage l
D
(ON)
V
D
= V
S
= 1V, 4V
0.01
1
0.01
5
nA
(Note 4)
200
200
nA
Input High Voltage V
INH
, V
WRH
2.4
2.4
V
Input Low Voltage V
INL
, V
WRL
0.8
0.8
V
Input High or Low Current
V
IN
= 5V, 0V
1
1
A
I
INH
, I
INL
, I
WRH
,
I
WRL
V
WR
= 5V, 0V
C
S
(OFF)
5
5
pF
C
D
(OFF)
12
12
pF
C
D
, C
S
(ON)
30
30
pF
I
+
All Channels On or Off
8
20
8
20
A
V
IN
= V
WR
= 0V or 4.0V
30
30
A
AC ELECTRICAL CHARACTERISTICS
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
U
DIGITAL A D DC ELECTRICAL CHARACTERISTICS
U
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, unless noted.
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 noted.
LTC221/LTC222
4
2212fa
LTC221/222 TPC05
V
IN
(V)
0
I
+
(
A)
150
200
250
4
100
50
0
1
2
3
5
ALL I
NX
TIED TOGETHER
WR TIED TO GROUND
ALL LOGIC INPUTS
TIED TOGETHER
V
+
= 5V
V
= 0V
T
A
= 25C
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.
R
ON
vs V
S
Over Supply Voltage
AC ELECTRICAL CHARACTERISTICS
Note 3: In-circuit ESD on the switch pins (S or D) exceeds 4kV (see test
circuit).
Note 4: Leakage current with a 5V supply is guaranteed by correlation with
the 15V leakage current.
TYPICAL PERFOR A CE CHARACTERISTICS
U
W
R
ON
vs V
S
Over Temperature
R
ON
vs V
S
Over Temperature
Positive Supply Current vs
Logic Input Voltage
Positive Supply Current vs
Logic Input Voltage
LTC221/222 TPC01
V
S
(V)
16
R
ON
(
)
150
12
100
50
200
250
0
8
0
12
20
16
4
4
8
20
T
A
= 25C
I
D
= 1mA
5V
10V
20V
V
SUPPLY
= 5V, OV
15V
LTC221/222 TPC04
V
IN
(V)
0
I
+
(
A)
150
200
250
12
100
50
0
3
6
9
15
V
+
= 15V
V
= 15V
T
A
= 25C
ALL I
NX
TIED TOGETHER
WR TIED TO GROUND
ALL LOGIC INPUTS
TIED TOGETHER
LTC221/222 TPC02
V
S
(V)
R
ON
(
)
12
60
9
40
20
80
100
0
6
0
9
15
12
3
3
6
15
V
+
= 15V
V
= 15V
I
D
= 1mA
55C
125C
25C
LTC221/222 TPC03
V
S
(V)
R
ON
(
)
300
4
200
100
400
500
0
1
0
2
3
5
V
+
= 5V
V
= 0V
I
D
= 1mA
55C
125C
25C
V
+
= 5V, V
= GND = 0V, unless otherwise noted.
LTC221M/LTC222M LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
t
ON
V
S
= 2V, R
L
= 1k, C
L
= 35pF
450
600
450
600
ns
t
OFF
190
300
190
300
ns
t
OPEN
100
250
100
250
ns
Off Isolation
V
S
= 2V
P-P
, R
L
= 1k
75
75
dB
Crosstalk
f = 100kHz
90
90
dB
Charge Injection O
INJ
R
GEN
= 0, C
L
= 1000pF, V
GEN
= 2.5V
2
2
pC
Total Harmonic Distortion THD
V
S
= 2V
P-P
, R
L
= 10k
0.01
0.01
%
t
ON
, WR
V
S
= 2V, R
L
= 1k, C
L
= 35pF
430
600
430
600
ns
t
OFF
, WR
160
300
160
300
ns
LTC221/LTC222
5
2212fa
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
APPLICATIO S I FOR ATIO
W
U
U
U
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
V
S
OV
OV
OV
3V
3V
LTC222
LOGIC INPUT
t
r
< 20ns
t
r
< 20ns
LTC221
LOGIC INPUT
t
r
< 20ns
t
r
< 20ns
SWITCH
INPUT
SWITCH
OUTPUT
50%
50%
V
O
0.9
0.9
LOGIC "0" = SW ON
LOGIC "1" = SW ON
V
O
t
ON
t
OFF
LTC221/222 AI02
S1
D1
(REPEAT TEST FOR IN2, IN3 AND IN4)
V
O
C
L
35pF
R
L
1k
R
L
R
L
+ R
DS(ON)
V
O
= V
S
IN1
SWITCH
OUTPUT
SWITCH
INPUT
LOGIC
INPUT
V
S
= 2V
LTC221/222 AI03
SX
R
GEN
V
GEN
DX
INX
V
O
C
L
= 1000pF
LTC221/222 AI04
OV
OV
3V
3V
V
O
LTC221 INX
LTC222 INX
V
O
V
O
IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION.
THE ERROR VOLTAGE IN COULOMBS IS Q = V
L
V
O
OFF
OFF
ON
ON
ON
ON
LTC221/222 AI05
V
S
V
+
V
C
OIRR = 20 LOG
C = 0.001F//0.1F
CHIP CAPACITORS
SIGNAL
GENERATOR
C
15V
15V
V
D
GND
V
IN
INX
V
S
V
D
R
L
1k
V
S
= 2V
P-P
f = 100kHz
CHAN A
ANALYZER
CHAN B
LTC221/222 AI06
V
S1
V
+
V
C
OIRR = 20 LOG
C = 0.001F//0.1F
CHIP CAPACITORS
SIGNAL
GENERATOR
C
NC
50
15V
15V
V
D2
V
S2
V
D1
V
L
GND
V
IN
V
IN
IN2
IN1
V
S1
V
D2
R
L
1k
V
S
= 2Vp-p
f = 100kHz
CHAN A
ANALYZER
CHAN B
LTC221/LTC222
6
2212fa
In-Circuit ESD Test Circuit
APPLICATIO S I FOR ATIO
W
U
U
U
LTC221/222 TA07
LTC221/
LTC222
GND
V
15V
15V
1.5k
ANY SOURCE OR DRAIN PIN
ESD TESTER
POWER APPLIED
OR OPEN CIRCUT
PER MIL-STD-883C
METHOD 3015.2
4kV
100pF
0.1F
0.1F
V
+
S OR D
LTC221/222 AI08
LTC221 IN
LTC222 IN
V
S
V
O
0V
0V
0V
0V
3V
3V
WR
3V
LOGIC INPUT
t
r
< 20ns
t
r
< 20ns
50%
50%
V
O
0.9
0.9
V
O
t
ON
t
OFF
WR
WR
LTC221/222 AI09
S1
D1
(REPEAT TEST FOR
IN2, IN3 AND IN4)
V
O
C
L
35pF
R
L
1k
IN1
R
L
R
L
+ r
DS(ON)
V
O
= V
S
SWITCH
OUTPUT
SWITCH
INPUT
LOGIC
INPUT
LOGIC
INPUT
V
S
= 2V
WR
V
15V
15V
V
+
GND
OV
LTC221/222 AI10
LTC221 IN
LTC222 IN
OV
OV
OV
3V
3V
3V
t
DW
t
WW
t
WD
WR
1.5V
1.5V
0.8V
0.8V
2.4V
2.4V
WR Switching Time Test Circuit
WR Setup Conditions
WR/Input Minimum Timing Requirements
PARAMETER
MIN LIMIT
UNITS
t
WW
Write Pulse Width
230
ns
t
DW
Data Valid to Write
180
ns
t
WD
Data Valid After Write
30
ns
LTC221/LTC222
7
2212fa
Auto Ranging an 8-Channel, 10-Bit A/D Converter
APPLICATIO S I FOR ATIO
W
U
U
U
LTC221/222 AI11
GND
IN3
IN4
WR
WR
IN2
IN1
D1
S1
D2
S2
V
IN
OV 5V
D3
S3
D4
S4
V
LTC221/
LTC222
LOGIC
DECODER
DATA BUS B0 B3
TO
MICROCONTROLLER
e.g. HD64180
ADDRESS BUS
LT1027
SERIAL PORT
LTC1090
5V
5V
15V
15V
15V
2.49k
4.99k
10k
20k
LT1006
+
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
AGND
CS
D
OUT
V
CC
D
IN
ACLK
SCLK
REF
+
REF
V
LTC221/LTC222
8
2212fa
8-Channel, 14-Bit A/D Converter
APPLICATIO S I FOR ATIO
W
U
U
U
LTC221/222 AI12
GND
IN3
IN4
WR
WR
IN2
IN1
D1
S1
D2
S2
V
IN
0V TO 5V
D3
S3
D4
S4
V
LTC221/
LTC222
LOGIC
DECODER
DATA BUS B0 B3
TO
MICROCONTROLLER
e.g. TMS370
ADDRESS BUS
LT1027
LTC1090
5V
15V
1k
1k
1k
1k
15V
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
AGND
CS
D
OUT
D
IN
ACLK
SCLK
REF
+
REF
V
SERIAL PORT
LTC221/LTC222
9
2212fa
U
PACKAGE DESCRIPTIO
OBSOLETE PACKAGE
J16 0801
.015 .060
(0.380 1.520)
.100
(2.54)
BSC
.014 .026
(0.360 0.660)
.045 .065
(1.143 1.651)
.200
(5.080)
MAX
.125
(3.175)
MIN
.008 .018
(0.203 0.457)
0 15
1
2
3
4
5
6
7
8
.220 .310
(5.588 7.874)
.840
(21.336)
MAX
.005
(0.127)
MIN
16
13
9
10
11
12
14
15
.025
(0.635)
RAD TYP
.300 BSC
(7.62 BSC)
.045 .065
(1.143 1.65)
FULL LEAD
OPTION
.023 .045
(0.584 1.143)
HALF LEAD
OPTION
CORNER LEADS OPTION
(4 PLCS)
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
J Package
16-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
LTC221/LTC222
10
2212fa
U
PACKAGE DESCRIPTIO
N Package
16-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
N16 0502
.255 .015*
(6.477 0.381)
.770*
(19.558)
MAX
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
.020
(0.508)
MIN
.125
(3.175)
MIN
.130 .005
(3.302 0.127)
.065
(1.651)
TYP
.045 .065
(1.143 1.651)
.018 .003
(0.457 0.076)
.100
(2.54)
BSC
.009 .015
(0.229 0.381)
.300 .325
(7.620 8.255)
.325
+.035
.015
+0.889
0.381
8.255
(
)
NOTE:
1. DIMENSIONS ARE
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
LTC221/LTC222
11
2212fa
U
PACKAGE DESCRIPTIO
.016 .050
(0.406 1.270)
.010 .020
(0.254 0.508)
45
0 8 TYP
.008 .010
(0.203 0.254)
1
N
2
3
4
5
6
7
8
N/2
.150 .157
(3.810 3.988)
NOTE 3
16
15
14
13
.386 .394
(9.804 10.008)
NOTE 3
.228 .244
(5.791 6.197)
12
11
10
9
S16 0502
.053 .069
(1.346 1.752)
.014 .019
(0.355 0.483)
TYP
.004 .010
(0.101 0.254)
.050
(1.270)
BSC
.245
MIN
N
1
2
3
N/2
.160 .005
RECOMMENDED SOLDER PAD LAYOUT
.045 .005
.050 BSC
.030 .005
TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
S Package
16-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LTC221/LTC222
12
2212fa
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC201/LTC202/LTC203 Micropower, Low Charge Injection, Quad CMOS Analog Switches
DG201/DG202 Compatible
LTC1380/LTC1393
8-Channel/4-Channel Analog Multiplexer with SMBus Interface
3V to 15V, 8 Single Ended/4 Differential Inputs
LTC1390/LTC1391
8-Channel, Analog Multiplexer with Serial Interface
3V to 15V Operation
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
www.linear.com
LW/TP 1002 1K REV A PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1991
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