LTC221CN [Linear]
Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches; 微功耗，低电荷注入，四路CMOS模拟开关与数据锁存器
| 型号： | LTC221CN |
| 厂家： | 
Linear |
| 描述： | Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches |
| 文件： | 总12页 (文件大小：141K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC221/LTC222
Micropower, Low Charge
Injection, Quad CMOS Analog
Switches with Data Latches
U
FEATURES
DESCRIPTIO
The LTC®221 and LTC222 are micropower, quad CMOS
analog switches which typically dissipate only 250µW
from ±15V supplies and 40µW from a single 5V supply.
Onboard latches allow the LTC221 and LTC222 to inter-
face directly to most microprocessor buses. The switches
have 65Ω 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.
Thesignalrangeis±15Vwithasupplyvoltageof±15Vand
0Vto5Vwithasingle5Vsupply.Theswitcheshavespecial
charge compensation circuitry which greatly reduces
charge injection to a maximum of±25pC (±15V supplies).
■
Micropower Operation
■
Single 5V or ±15V Supply Operation
■
Low Charge Injection
Low RON
Low Leakage
Guaranteed Break Before Make
Latch Resistant Design
TLL/CMOS Compatible
■
■
■
■
■
■
Improved Second Source for DG221/DG222
Microprocessor Bus Compatible
■
U
KEY SPECIFICATIO S
The LTC221 and LTC222 are designed for applications
Supply Current ..................... I+ = 40µA, I– = 5µA Max
Charge Injection
■
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.
■
±15V Supplies .................................±25pC Max
Single 5V Supply.................................. 2pC Typ
RON ............................................................... 65ΩTyp
Signal Range ..................................................... ±15V
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Two-Channel, 12-Bit, Self Calibrating Data Acquisition System
LTC221/LTC222
WR
WR
IN4
+
V
LOGIC
DECODER
5V
ADDRESS BUS
GND
IN3
IN2
IN1
–
DATA BUS B0 – B3
V
TO MICROPROCESSOR
e.g. TMS320C25
15V
S1
S2
D1
D2
5V
V
FS
+
10k
LTC1292
CLK
IN
V
IN
OV TO 5V
LT1006
D
12-BIT
ADC
OUT
S3
S4
D3
D4
–
SERIAL PORT
100k
CS
V
150k
REF
–IN
GND
270Ω
120Ω
–15V
LT1027
15V
V
FS
LTC221/222 • TA01
2212fa
1
LTC221/LTC222
W W U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
TOP VIEW
Voltages Referenced to V–
ORDER PART
NUMBER
LTC221CN
LTC221CS
LTC222CN
LTC222CS
IN1
D1
S1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN2
D2
S2
V+ ........................................................................................... 44V
GND..................................................................... 25V
Digital Inputs, S, D (Note 2) .......... –2V to (V+ 2V) or
Digital Inputs, S, D (N2020mA, Whichever Occurs First
Current
–
+
V
V
GND
S4
WR
S3
D4
D3
Any Input Except S or D ................................... 30mA
Continuous S or D ............................................ 20mA
Peak S or D
IN4
IN3
N PACKAGE
16-LEAD PDIP
S PACKAGE
16-LEAD PLASTIC SO
J
= 110°C, θ = 120°C/W
J
= 110°C, θ = 130°C/W
(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 .................................. 0°C to 70°C
LTC221M/LTC222M (OBSOLETE).......–55°C to 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
MAX
JA
MAX
JA
J PACKAGE
16-LEAD CERDIP
LTC221MJ
LTC221CJ
LTC222MJ
LTC222CJ
OBSOLETE PACKAGE
Consider the N or S Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LOGIC TABLE
INX
0
WR
0
LTC221
LTC222
On
Off
Off
On
1
0
X
1
Maintain Previous State
Maintain Previous State
U
DIGITAL A D DC ELECTRICAL CHARACTERISTICS The
■
denotes the specifications which apply
over full operating temperature range, otherwise specifications are at TA = 25
°
C. V+ = ±15V, V– = –15V, GND = 0V, unless noted.
LTC221M/LTC222M
LTC221C/LTC222C
PARAMETER
Analog Signal Range
RON
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX UNITS
■
±15
90
90
135
±1
±100
±1
±100
±1
±200
±15
90
V
Ω
VS = ±10V
ID = 1mA
TMIN
25°C
TMAX
65
65
90
Ω
135
±5
±100
±5
±100
±5
±200
Ω
Off Input Leakage IS (OFF)
Off Output Leakage ID (0FF)
On Channel Leakage lD (ON)
VD = 14V, VS = ±14V
0.01
0.01
0.02
0.01
0.01
0.02
nA
nA
nA
nA
nA
nA
V
■
■
VIN = 2.4V, LTC221
VIN = 0.8V, LTC222
VD = VS = ±14V, VIN = 2.4V, LTC222
VIN = 0.8V, LTC221
■
■
■
■
Input High Voltage VINH, VWRH
Input Low Voltage VINL, VWRL
Input High or Low Current
IINH, IINL, IWRH, IWRL
2.4
2.4
0.8
±1
0.8
V
VIN = 15V, 0V
VWR = 15V, 0V
±1
µA
CS (OFF)
CD (OFF)
CD, CS (ON)
I+
5
5
pF
pF
pF
µA
12
30
16
12
30
16
All Channels On or Off
VIN = VWR = 0V or 4.0V
40
60
40
60
■
µA
2212fa
2
LTC221/LTC222
U
DIGITAL A D DC ELECTRICAL CHARACTERISTICS The
denotes the specifications which apply
C. V+ = ±15V, V–■= –15V, GND = 0V, unless noted.
over full operating temperature range, otherwise specifications are at TA = 25
°
LTC221M/LTC222M
LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
I–
0.1
5
0.1
5
µA
■
10
10
AC ELECTRICAL CHARACTERISTICS
V+ = 15V, V– = –15V, GND = 0V, unless otherwise noted.
LTC221M/LTC222M
LTC221C/LTC222C
PARAMETER
CONDITIONS
MIN
TYP
290
210
85
MAX
400
300
MIN
TYP
290
210
85
MAX
400
300
UNITS
tON
VS = 2V, RL = 1kΩ, CL = 35pF
ns
tOFF
tOPEN
20
20
ns
Off Isolation
VS = 2Vp-p, RL = 1kΩ
f = 100kHz
75
75
dB
Crosstalk
90
90
Charge Injection OINJ
Total Harmonic Distortion THD
tON, WR
RGEN = 0Ω, CL = 1000pF, VGEN = 0
VS = 2Vp-p, RL = 10kΩ
VS = 2V, RL = 1kΩ, CL = 35pF
5
±25
8
±25
pC
%
0.01
270
160
0.01
270
160
400
300
400
300
ns
tOFF, WR
U
DIGITAL A D DC ELECTRICAL CHARACTERISTICS The
■
denotes the specifications which apply
over full operating temperature range, otherwise specifications are at TA = 25
°
C. V+ = 5V, V– = GND = 0V, unless noted.
LTC221M/LTC222M LTC221C/LTC222C
PARAMETER
Analog Signal Range
RON
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
V
■
0
5
0
5
VS = 1.5V, 3V
ID = 0.25mA
TMIN
25°C
TMAX
450
450
650
±1
520
520
650
±5
Ω
280
0.01
0.01
0.01
280
0.01
0.01
0.01
Ω
Ω
Off Input Leakage IS (OFF)
Off Output Leakage ID (0FF)
On Channel Leakage lD (ON)
VD = 4V, 1V; VS = 1V, 4V
(Note 4)
nA
nA
nA
nA
nA
nA
V
■
■
±100
±1
±100
±5
±100
±1
±100
±5
VD = VS = 1V, 4V
(Note 4)
■
■
■
■
±200
±200
Input High Voltage VINH, VWRH
Input Low Voltage VINL, VWRL
Input High or Low Current
2.4
2.4
0.8
0.8
V
VIN = 5V, 0V
VWR = 5V, 0V
±1
±1
µA
I
INH, IINL, IWRH, IWRL
CS(OFF)
CD (OFF)
CD, CS (ON)
I+
5
12
30
8
5
12
30
8
pF
pF
pF
µA
µA
All Channels On or Off
VIN = VWR = 0V or 4.0V
20
30
20
30
■
2212fa
3
LTC221/LTC222
V+ = 5V, V– = GND = 0V, unless otherwise noted.
AC ELECTRICAL CHARACTERISTICS
LTC221M/LTC222M
LTC221C/LTC222C
PARAMETER
tON
CONDITIONS
MIN
TYP
450
190
250
75
MAX
600
300
MIN
TYP
450
190
250
75
MAX
600
300
UNITS
ns
VS = 2V, RL = 1kΩ, CL = 35pF
tOFF
ns
tOPEN
100
100
ns
Off Isolation
Crosstalk
Charge Injection OINJ
VS = 2VP-P, RL = 1kΩ
f = 100kHz
dB
dB
pC
%
90
90
RGEN = 0Ω, CL = 1000pF, VGEN = 2.5V
2
2
Total Harmonic Distortion THD VS = 2VP-P, RL = 10kΩ
0.01
430
160
0.01
430
160
tON, WR
tOFF, WR
VS = 2V, RL = 1kΩ, CL = 35pF
600
300
600
300
ns
ns
Note 3: In-circuit ESD on the switch pins (S or D) exceeds 4kV (see test
Note 1: Absolute Maximum Ratings are those values beyond which the life
circuit).
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.
+
–
Note 4: Leakage current with a 5V supply is guaranteed by correlation with
the ±15V leakage current.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
RON vs VS Over Supply Voltage
RON vs VS Over Temperature
RON vs VS Over Temperature
+
–
V
V
= 5V
= 0V
V
= 5V, OV
T
I
= 25°C
= 1mA
SUPPLY
A
D
500
400
300
200
100
80
250
200
150
100
125°C
I
= 1mA
D
125°C
25°C
25°C
60
±5V
40
–55°C
±10V
±15V
±20V
–55°C
+
–
100
0
20
50
V
V
I
= 15V
= –15V
= 1mA
D
0
0
0
1
2
3
4
5
–15 –12 –9 –6 –3
0
3
6
9
12 15
–20 –16 –12 –8 –4
0
4
8
12 16 20
V
(V)
V
(V)
V
(V)
S
S
S
LTC221/222 • TPC03
LTC221/222 • TPC02
LTC221/222 • TPC01
Positive Supply Current vs
Logic Input Voltage
Positive Supply Current vs
Logic Input Voltage
250
200
150
100
50
250
200
150
100
50
+
–
+
–
V
V
T
= 5V
V
V
T
= 15V
ALL LOGIC INPUTS
TIED TOGETHER
ALL LOGIC INPUTS
TIED TOGETHER
= 0V
= –15V
= 25°C
= 25°C
A
A
ALL I TIED TOGETHER
NX
ALL I TIED TOGETHER
NX
WR TIED TO GROUND
WR TIED TO GROUND
0
0
0
3
6
9
12
15
0
1
2
3
4
5
V
(V)
IN
V
(V)
IN
LTC221/222 • TPC04
2212fa
LTC221/222 • TPC05
4
LTC221/LTC222
W U U
APPLICATIO S I FOR ATIO
U
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
state output switch on. Feedthrough via gate capacitance
may result in spikes at leading and trailing edge of output
waveform.
Switching Time Test Circuit
LOGIC "1" = SW ON
LOGIC "0" = SW ON
LTC222
SWITCH
INPUT
SWITCH
OUTPUT
3V
OV
3V
OV
LOGIC INPUT
D1
S1
50%
50%
t < 20ns
r
V
O
V
= 2V
S
t < 20ns
r
R
C
R
L
L
L
LTC221
V
= V
S
O
1k
35pF
IN1
R + R
L
DS(ON)
LOGIC INPUT
LOGIC
INPUT
t < 20ns
r
t < 20ns
r
SWITCH
INPUT
V
S
(REPEAT TEST FOR IN2, IN3 AND IN4)
V
0.9
V
0.9
O
O
SWITCH
OUTPUT
OV
LTC221/222 • AI02
t
t
ON
OFF
LTC221/222 • AI01
Charge Injection Test Circuit
∆V
O
R
GEN
SX
DX
V
O
C
= 1000pF
V
L
GEN
V
O
INX
3V
OV
3V
OV
OFF
LTC221 INX
LTC222 INX
ON
ON
ON
ON
LTC221/222 • AI03
OFF
∆V IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION.
O
THE ERROR VOLTAGE IN COULOMBS IS ∆Q = V • ∆V
L
O
LTC221/222 • AI04
OIRR-Off Isolation Test Circuit
CCRR-Channel to Channel Crosstalk Test Circuit
C
15V
C
15V
SIGNAL
GENERATOR
SIGNAL
GENERATOR
+
+
50Ω
V
L
V
V
V
V
V
S
S1
D1
V
S
= 2Vp-p
V
S
= 2V
P-P
f = 100kHz
f = 100kHz
INX
IN1
V
IN2
V
IN
V
IN
CHAN A
ANALYZER
CHAN B
CHAN A
ANALYZER
CHAN B
V
IN
V
V
D
D2
S2
NC
–
–
GND
V
GND
V
R
L
R
1k
L
1k
C = 0.001µF//0.1µF
CHIP CAPACITORS
C = 0.001µF//0.1µF
CHIP CAPACITORS
V
V
C
S
D
V
V
C
S1
D2
OIRR = 20 LOG
OIRR = 20 LOG
–15V
–15V
LTC221/222 • AI05
LTC221/222 • AI06
2212fa
5
LTC221/LTC222
W U U
U
APPLICATIO S I FOR ATIO
In-Circuit ESD Test Circuit
ANY SOURCE OR DRAIN PIN
LTC221/
LTC222
ESD TESTER
1.5k
+
–
15V
S OR D
V
V
POWER APPLIED
OR OPEN CIRCUT
±4kV
100pF
0.1µF
–15V
0.1µF
GND
PER MIL-STD-883C
METHOD 3015.2
LTC221/222 • TA07
WR Switching Time Test Circuit
3V
LOGIC
INPUT
WR
LTC221 IN
LTC222 IN
50%
50%
15V
+
0V
3V
V
WR
SWITCH
INPUT
SWITCH
OUTPUT
V
D1
S1
V
= 2V
S
O
0V
3V
R
C
L
L
IN1
1k
35pF
LOGIC
INPUT
0V
(REPEAT TEST FOR
IN2, IN3 AND IN4)
–
V
S
V
GND
OV
V
0.9
OFF
V
0.9
O
O
V
O
–15V
0V
R
R + r
L
V
= V
S
O
t
WR
ON
L
DS(ON)
LOGIC INPUT
t < 20ns
t < 20ns
t
WR
LTC221/222 • AI09
r
r
LTC221/222 • AI08
WR/Input Minimum Timing Requirements
WR Setup Conditions
3V
PARAMETER
MIN LIMIT
230
UNITS
ns
1.5V
1.5V
WR
LTC221 IN
LTC222 IN
OV
3V
t
t
t
Write Pulse Width
Data Valid to Write
Data Valid After Write
t
WW
DW
WD
WW
t
t
WD
DW
180
ns
0.8V
2.4V
0.8V
2.4V
30
ns
OV
3V
OV
LTC221/222 • AI10
2212fa
6
LTC221/LTC222
W U U
APPLICATIO S I FOR ATIO
U
Auto Ranging an 8-Channel, 10-Bit A/D Converter
V
CH0
CH1
CH2
CH3
CH4
CH5
CC
SERIAL PORT
15V
5V
ACLK
SCLK
D
15V
5V
IN
LT1027
15V
LTC221/
LTC222
V
IN
OV – 5V
D
OUT
S1
S2
S3
S4
D1
D2
D3
D4
LTC1090
CS
+
–
+
–
REF
REF
CH6
CH7
LT1006
20kΩ
10kΩ
–
V
COM
DGND
AGND
TO
MICROCONTROLLER
e.g. HD64180
4.99kΩ
2.49kΩ
IN1
IN2
IN3
IN4
WR
DATA BUS B0 – B3
WR
–
V
LOGIC
DECODER
GND
ADDRESS BUS
LTC221/222 • AI11
2212fa
7
LTC221/LTC222
W U U
U
APPLICATIO S I FOR ATIO
8-Channel, 14-Bit A/D Converter
CH0
CH1
CH2
CH3
CH4
CH5
5V
ACLK
SCLK
SERIAL PORT
D
IN
V
IN
D
OUT
0V TO 5V
LTC1090
CS
1kΩ
1kΩ
1kΩ
+
REF
REF
CH6
CH7
LT1027
15V
–
–
V
COM
DGND
1kΩ
AGND
15V
TO
S1
D1
D2
D3
D4
MICROCONTROLLER
e.g. TMS370
S2
S3
S4
IN1
IN2
IN3
IN4
WR
LTC221/
LTC222
DATA BUS B0 – B3
WR
–
V
LOGIC
DECODER
GND
ADDRESS BUS
LTC221/222 • AI12
2212fa
8
LTC221/LTC222
U
PACKAGE DESCRIPTIO
J Package
16-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
.840
(21.336)
MAX
CORNER LEADS OPTION
(4 PLCS)
.005
(0.127)
MIN
16
10
15
14
12
11
9
8
13
.023 – .045
(0.584 – 1.143)
HALF LEAD
OPTION
.220 – .310
(5.588 – 7.874)
.025
(0.635)
RAD TYP
.045 – .065
(1.143 – 1.65)
FULL LEAD
OPTION
2
3
5
1
4
6
7
.200
(5.080)
MAX
.300 BSC
(7.62 BSC)
.015 – .060
(0.380 – 1.520)
.008 – .018
(0.203 – 0.457)
0° – 15°
.045 – .065
(1.143 – 1.651)
.125
(3.175)
MIN
.100
(2.54)
BSC
.014 – .026
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
(0.360 – 0.660)
J16 0801
OBSOLETE PACKAGE
2212fa
9
LTC221/LTC222
U
PACKAGE DESCRIPTIO
N Package
16-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.770*
(19.558)
MAX
14
12
10
9
8
15
13
11
16
.255 ± .015*
(6.477 ± 0.381)
2
1
3
4
6
5
7
.300 – .325
.130 ± .005
.045 – .065
(7.620 – 8.255)
(3.302 ± 0.127)
(1.143 – 1.651)
.020
(0.508)
MIN
.065
(1.651)
TYP
.009 – .015
(0.229 – 0.381)
+.035
–.015
.325
.125
(3.175)
MIN
.018 ± .003
(0.457 ± 0.076)
.100
(2.54)
BSC
+0.889
8.255
(
)
–0.381
NOTE:
INCHES
1. DIMENSIONS ARE
N16 0502
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
2212fa
10
LTC221/LTC222
U
PACKAGE DESCRIPTIO
S Package
16-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.386 – .394
(9.804 – 10.008)
.045 ±.005
NOTE 3
.050 BSC
16
N
15
14
13
12
11
10
9
N
1
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
2
3
N/2
N/2
8
.030 ±.005
TYP
RECOMMENDED SOLDER PAD LAYOUT
2
3
5
6
7
1
4
.010 – .020
(0.254 – 0.508)
× 45°
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.008 – .010
(0.203 – 0.254)
0° – 8° TYP
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
.016 – .050
(0.406 – 1.270)
S16 0502
NOTE:
1. DIMENSIONS IN
INCHES
(MILLIMETERS)
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)
2212fa
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LTC221/LTC222
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC201/LTC202/LTC203 Micropower, Low Charge Injection, Quad CMOS Analog Switches DG201/DG202 Compatible
LTC1380/LTC1393
LTC1390/LTC1391
8-Channel/4-Channel Analog Multiplexer with SMBus Interface
8-Channel, Analog Multiplexer with Serial Interface
3V to ±15V, 8 Single Ended/4 Differential Inputs
3V to ±15V Operation
2212fa
LW/TP 1002 1K REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
■
■
LINEAR TECHNOLOGY CORPORATION 1991
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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