A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD4201/ALD4202M
CMOS LOW VOLTAGE, LOW CHARGE INJECTION QUAD SPST ANALOG SWITCHES
GENERAL DESCRIPTION
The ALD4201/ALD4202M are quad SPSTCMOS analog switches speci-
fically developed for 3 to 12 volt applications where low charge injection
and low leakage currents are important analog switch operating
characteristics. The main features are precision matching, charge
compensation circuitry, fast switching, low on-resistance and micropower
consumption. The ALD4201 operates in break-before-make switching
whereas the ALD4202M operates in make-before-break switching.
The ALD4201/ALD4202M are designed for precision applications such as
charge amplifiers, sample and hold amplifiers, data converter switches,
and programmable gain amplifiers. These switches are also excellent for
general purpose switching applications for micropower battery operated
systems.
APPLICATIONS INFORMATION
The ALD4201/ALD4202M are designed to operate with standard single or
dual power supplies of +3V to 10V or
±1.5V
to
±5V.
Functionality extends
down to +2V or
±1V
power supply, making it suitable for lithium battery or
rechargeable battery operated systems where power efficiency and
performance are important design parameters. These switches feature
nA quiescent current and interface directly to CMOS logic levels from
microprocessor or logic interface circuits. Built- in level shifters at the input
stage provide for dual supply analog signal switching. On the board level,
low charge injection and fast operation can be obtained by using short
leads, minimizing input and output capacitances, and by adequate
bypass capacitors placed on the board at the supply nodes. For more
information, see Application Note AN4200.
The ALD4201/4202M are manufactured with Advanced Linear Devices'
enhanced ACMOS silicon gate CMOS process, and are also part of the
linear elements in Advanced Linear Devices' "Function-Specific" ASIC.
ORDERING INFORMATION
Operating Temperature Range
-55°C to +125°C
0°C to +70°C
0°C to +70°C
16-Pin
CERDIP
Package
ALD4201 DC
ALD4202M DC
16-Pin
Plastic Dip
Package
ALD4201 PC
ALD4202M PC
16-Pin
SOIC
Package
ALD4201 SC
ALD4202M SC
FEATURES
•
•
•
•
•
•
•
•
•
•
3V, 5V & 10V supply operation
±1.5V, ±2.5V
&
±5V
supply operation
0.1µW power dissipation
1pC charge injection
Rail-to-rail signal range
Low on-resistance
pA leakage current
4201 break-before-make switching
4202M make-before-break switching
Built-in dual supply level translator
BENEFITS
•
•
•
•
•
Fast effective signal throughput
Low switching transients
Low signal loss
Essentially no DC power consumption
Full analog signal range over power
supply rail
• Flexible power supply range for battery
operated systems
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
•
Low level signal conditioning circuits
Portable battery operated instruments
Computer peripherals
PCMCIA
Fast sample and hold
Analog signal multiplexer
Programmable gain amplifiers
Switched capacitor circuits
Micropower based systems
Video/audio switches
Feedback control systems
PIN CONFIGURATION / BLOCK DIAGRAM
IN
1
D
1
S
1
V-
GND
IN
2
D
2
S
2
V+
NC
S
3
D
3
IN
3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LOGIC TABLE
Input Logic
ALD4201
0
1
On
Off
Switch State
ALD4202M
Off
On
S
4
D
4
IN
4
DC, PC, SC PACKAGE
* Contact factory for industrial temperature range.
© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
AC ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C V
+
= +5.0V, V
-
= -5.0V, GND = 0.0V unless otherwise specified
Parameter
Turn On
Delay time
Turn Off
Delay time
Break-Before-Make
Symbol
t
ON
t
OFF
t
BD
t
MD
Q
INJ
4201/4202M (PC)
Min
Typ Max
150
60
60
100
20
90
240
110
130
180
4201/4202M (DC)
Min Typ Max
150
60
60
100
20
90
240
110
130
180
4201/4202M (SC)
Min Typ
Max
150
60
60
100
20
90
240
110
130
180
Unit
ns
ns
ns
ns
ns
Test Conditions
4201 (Note 2)
4202M
4201 (Note 2)
4202M
4201 (Note 3)
Delay Time
Make-Before-Break
15
40
15
40
15
40
ns
4202M (Note 3)
Delay Time
Charge Injection
Off Isolation
Crosstalk
Total Harmonic
Distortion
Source/Drain
Off Capacitance
Channel On
Capacitance
Pin to Pin
Capacitance
T
HD
C
S(OFF)
C
D(OFF)
C
DS(ON)
C
PP
2
1
75
90
0.05
0.01
5
2.5
2
1
75
90
0.05
0.01
5
2.5
1
0.7
75
90
0.05
0.01
2.5
2.0
pC
pC
dB
dB
%
4201 (Note 3) (Note 4)
4202M
At f = 100KHz, (Note 5)
At f = 100KHz, (Note 6)
R
L
= 10K
R
L
= 100K
3.0
5.7
3.0
5.7
3.0
5.7
pF
pF
0.5
0.6
0.25
pF
DC ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C V
+
= +5.0V, V- = GND = 0.0V unless otherwise specified
ALD4201/4202M (PC,SC)
Parameter
Analog Signal Range
On - Resistance
Symbol
V
A
R
ON
Min
0.0
195
240
Typ
Max
+5.0
280
350
ALD4201/4202M (DC)
Min
0.0
195
270
Change of On-Resistance
from -V
S
to +V
S
Change of On-Resistance
with Temperature
Typ
Max
+5.0
280
390
Unit
V
Ω
Test Conditions
V
A
= +2.5V
I
A
= 1mA
0°C to +70°C
-55°C to +125°C
∆R
ON
∆R
ON
/∆T
20
20
%
0.43
0.43
%/°C
R
ON
Match
Between Switches
Input High Voltage
Input Low Voltage
Notes:
V
IH
V
IL
4.0
2
2
%
4.0
0.8
0.8
V
V
1.
Voltage on any terminal must be less than (V+) + 0.3V and greater than (V-) - 0.3V, at all times including before power is applied and V+ = V- = 0.0V.
Vsupply power supply needs to be sequenced on first on power turn-on and sequenced off last during power turn-off.
2.
See Switching Time Test
Circuit.
3.
Guaranteed by design .
4.
See Charge Injection Test Circuit
5.
See Off Isolation Test Circuit
6.
See Crosstalk Test Circuit
ALD4201/ALD4202M
Advanced Linear Devices
3
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