a
FEATURES
+5 V, 65 V Power Supplies
Ultralow Power Dissipation (<0.5 mW)
Low Leakage (<100 pA)
Low On Resistance (<50 V)
Fast Switching Times
Low Charge Injection
TTL/CMOS Compatible
TSSOP Package
APPLICATIONS
Battery Powered Instruments
Single Supply Systems
Remote Powered Equipment
+5 V Supply Systems
Computer Peripherals such as Disk Drives
Precision Instrumentation
Audio and Video Switching
Automatic Test Equipment
Precision Data Acquisition
Sample Hold Systems
Communication Systems
LC2MOS
Precision 5 V Quad SPST Switches
ADG661/ADG662/ADG663
FUNCTIONAL BLOCK DIAGRAM
S1
S1
IN1
IN1
D1
S2
D1
S2
IN2
IN2
ADG661
D2
ADG662
S3
D2
S3
IN3
IN3
D3
S4
D3
S4
IN4
IN4
D4
D4
S1
IN1
D1
S2
IN2
ADG663
D2
S3
IN3
D3
S4
IN4
D4
SWITCHES SHOWN FOR A LOGIC "1" INPUT
GENERAL DESCRIPTION
The ADG661, ADG662 and ADG663 are monolithic CMOS
devices comprising four independently selectable switches.
These switches feature low, well-controlled on resistance and
wide analog signal range, making them ideal for precision analog
signal switching.
They are fabricated using Analog Devices' advanced linear
compatible CMOS (LC2MOS) process, which offers benefits of
low leakage currents, ultralow power dissipation and low capacitance for fast switching speeds with minimum charge injection.
The on resistance profile is very flat over the full analog input
range ensuring excellent linearity and low distortion when
switching audio signals. Fast switching speed coupled with high
signal bandwidth also make the parts suitable for video signal
switching. CMOS construction ensures ultralow power dissipation making the parts ideally suited for portable and battery
powered instruments.
The ADG661, ADG662 and ADG663 contain four independent SPST switches. The ADG661 and ADG662 differ only in
that the digital control logic is inverted. The ADG661 switches
are turned on with a logic low on the appropriate control input,
while a logic high is required for the ADG662. The ADG663
has two switches with digital control logic similar to that of the
ADG661, while the logic is inverted on the other two switches.
Each switch conducts equally well in both directions when ON
and has an input signal range that extends to the supplies. In the
OFF condition, signal levels up to the supplies are blocked. All
switches exhibit break-before-make switching action for use in
multiplexer applications. Inherent in the design is low charge
injection for minimum transients when switching the digital
inputs.
PRODUCT HIGHLIGHTS
1. +5 V Single Supply Operation
The ADG661, ADG662 and ADG663 offer high performance, including low on resistance and wide signal range,
fully specified and guaranteed with ± 5 V and +5 V supply
rails.
2. Ultralow Power Dissipation
CMOS construction ensures ultralow power dissipation.
3. Low RON
4. Break-Before-Make Switching
This prevents channel shorting when the switches are configured as a multiplexer.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
ADG661/ADG662/ADG663–SPECIFICATIONS1
Dual Supply (V
DD
= +5 V 6 10%, VSS = –5 V 6 10%, GND = 0 V, unless otherwise noted)
Parameter
ANALOG SWITCH
Analog Signal Range
RON
LEAKAGE CURRENTS
Source OFF Leakage IS (OFF)
Drain OFF Leakage ID (OFF)
Channel ON Leakage ID, IS (ON)
+258C
B Versions
– 408C to +858C
Units
Test Conditions/Comments
V
Ω typ
Ω max
VD = –3.5 V to +3.5 V, IS = –10 mA;
VDD = +4.5 V, VSS = –4.5 V
±5
nA typ
nA max
nA typ
nA max
nA typ
nA max
VDD = +5.5 V, VSS = –5.5 V
VD = ± 4.5 V, VS = ± 4.5 V;
Test Circuit 2
VD = ± 4.5 V, VS = ± 4.5 V;
Test Circuit 2
VD = VS = ± 4.5 V;
Test Circuit 3
2.4
0.8
V min
V max
± 0.1
µA typ
µA max
VIN = VINL or VINH
RL = 300 Ω, CL = 35 pF;
VS = ± 3 V; Test Circuit 4
RL = 300 Ω, CL = 35 pF;
VS = ± 3 V; Test Circuit 4
RL = 300 Ω, CL = 35 pF;
VS1 = VS2 = +3 V; Test Circuit 5
VS = 0 V, RS = 0 Ω, CL = 10 nF;
Test Circuit 6
RL = 50 Ω, CL = 5 pF, f = 1 MHz;
Test Circuit 7
RL = 50 Ω, CL = 5 pF, f = 1 MHz;
Test Circuit 8
f = 1 MHz
f = 1 MHz
f = 1 MHz
VDD to VSS
30
38
± 0.025
± 0.1
± 0.025
± 0.1
± 0.05
± 0.2
DIGITAL INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
IINL or IINH
0.005
DYNAMIC CHARACTERISTICS2
tON
150
50
± 2.5
± 2.5
tOFF
55
Break-Before-Make Time Delay, tD
(ADG663 Only)
Charge Injection
80
ns typ
ns max
ns typ
ns max
ns typ
6
pC typ
OFF Isolation
70
dB typ
Channel-to-Channel Crosstalk
90
dB typ
CS (OFF)
CD (OFF)
CD, CS (ON)
9
9
28
pF typ
pF typ
pF typ
275
120
POWER REQUIREMENTS
VDD
IDD
+4.5/5.5
–4.5/5.5
0.0001
1
ISS
0.0001
1
V min/max
V min/max
µA typ
µA max
µA typ
µA max
VDD = +5.5 V, VSS = –5.5 V
Digital Inputs = 0 V or 5 V
NOTES
1
Temperature ranges are as follows: B Versions, –40°C to +85°C.
2
Guaranteed by design, not subject to production test.
Specifications subject to change without notice.
–2–
REV. 0
ADG661/ADG662/ADG663
Single Supply (V
DD
= +5 V 6 10%, VSS = 0 V, GND = 0 V, unless otherwise noted)
Parameter
ANALOG SWITCH
Analog Signal Range
RON
LEAKAGE CURRENTS
Source OFF Leakage IS (OFF)
Drain OFF Leakage ID (OFF)
Channel ON Leakage ID, IS (ON)
+258C
B Versions
– 408C to +858C
Units
Test Conditions/Comments
V
Ω typ
Ω max
VD = 0 V to +3.5 V, IS = –10 mA;
VDD = +4.5 V
±5
nA typ
nA max
nA typ
nA max
nA typ
nA max
VDD = +5.5 V
VD = 4.5 V/1 V, VS = 1 V/4.5 V;
Test Circuit 2
VD = 4.5 V/1 V, VS = 1 V/4.5 V;
Test Circuit 2
VD = VS = +4.5 V/+1 V;
Test Circuit 3
2.4
0.8
V min
V max
± 0.1
µA typ
µA max
VIN = VINL or VINH
0 V to VDD
45
68
± 0.025
± 0.1
± 0.025
± 0.1
± 0.05
± 0.2
DIGITAL INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
IINL or IINH
0.005
DYNAMIC CHARACTERISTICS2
tON
250
75
± 2.5
± 2.5
tOFF
45
Break-Before-Make Time Delay, tD
(ADG663 Only)
Charge Injection
140
ns typ
ns max
ns typ
ns max
ns typ
12
pC typ
OFF Isolation
70
dB typ
Channel-to-Channel Crosstalk
90
dB typ
CS (OFF)
CD (OFF)
CD, CS (ON)
9
9
28
pF typ
pF typ
pF typ
RL = 300 Ω, CL = 35 pF;
VS = +2 V; Test Circuit 4
RL = 300 Ω, CL = 35 pF;
VS = +2 V; Test Circuit 4
RL = 300 Ω, CL = 35 pF;
VS1 = VS2 = +2 V; Test Circuit 5
VS = 0 V, RS = 0 Ω, CL = 10 nF;
Test Circuit 6
RL = 50 Ω, CL = 5 pF, f = 1 MHz;
Test Circuit 7
RL = 50 Ω, CL = 5 pF, f = 1 MHz;
Test Circuit 8
f = 1 MHz
f = 1 MHz
f = 1 MHz
V min/max
µA typ
µA max
VDD = +5.5 V
Digital Inputs = 0 V or 5 V
400
100
POWER REQUIREMENTS
VDD
IDD
+4.5/5.5
0.0001
1
NOTES
1
Temperature ranges are as follows: B Versions, –40°C to +85°C.
2
Guaranteed by design, not subject to production test.
Specifications subject to change without notice.
REV. 0
–3–
ADG661/ADG662/ADG663
ABSOLUTE MAXIMUM RATINGS 1
Lead Temperature, Soldering
Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
(TA = +25°C unless otherwise noted)
VDD to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+44 V
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +25 V
VSS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –25 V
Analog, Digital Inputs2 . . . . . . . . . . . VSS –2 V to VDD +2 V or
30 mA, Whichever Occurs First
Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . . 30 mA
Peak Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA
(Pulsed at 1 ms, 10% Duty Cycle max)
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
TSSOP Package, Power Dissipation . . . . . . . . . . . . . . 450 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . 115°C/W
θJC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . 35°C/W
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability. Only one absolute
maximum rating may be applied at any one time.
2
Overvoltages at IN, S or D will be clamped by internal diodes. Current should be
limited to the maximum ratings given.
ORDERING GUIDE
Model
Temperature
Range
Package
Description
Package
Option
ADG661BRU
ADG662BRU
ADG663BRU
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
16-Lead TSSOP
16-Lead TSSOP
16-Lead TSSOP
RU-16
RU-16
RU-16
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADG661/ADG662/ADG663 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of
functionality.
–4–
WARNING!
ESD SENSITIVE DEVICE
REV. 0
ADG661/ADG662/ADG663
PIN CONFIGURATION
IN1 1
16
IN2
D1 2
15
D2
S1 3
14
S2
13
VDD
VSS 4
ADG661
ADG662
ADG663
TERMINOLOGY
VDD
VSS
GND
S
D
IN
RON
IS (OFF)
ID (OFF)
ID, IS (ON)
VD (VS)
CS (OFF)
CD (OFF)
CD, CS (ON)
tON
12 NC
TOP VIEW
S4 6 (Not to Scale) 11 S3
GND 5
D4 7
10
D3
IN4 8
9
IN3
NC = NO CONNECT
Table I. Truth Table (ADG661/ADG662)
ADG661 In
ADG662 In
Switch Condition
0
1
1
0
ON
OFF
Table II. Truth Table (ADG663)
Logic
Switch 1, 4
Switch 2, 3
0
1
OFF
ON
ON
OFF
tOFF
tD
Crosstalk
Off Isolation
Charge
Injection
REV. 0
–5–
Most positive power supply potential.
Most negative power supply potential in
dual supplies. In single supply applications,
it may be connected to GND.
Ground (0 V) Reference.
Source Terminal. May be an input or output.
Drain Terminal. May be an input or output.
Logic Control Input.
Ohmic resistance between D and S.
Source leakage current with the switch “OFF.”
Drain leakage current with the switch “OFF.”
Channel leakage current with the switch “ON.”
Analog voltage on terminals D, S.
“OFF” Switch Source Capacitance.
“OFF” Switch Drain Capacitance.
“ON” Switch Capacitance.
Delay between applying the digital control
input and the output switching on.
Delay between applying the digital control
input and the output switching off.
“OFF” time or “ON” time measured between
the 90% points of both switches, when
switching from one address state to another.
A measure of unwanted signal which is
coupled through from one channel to another
as a result of parasitic capacitance.
A measure of unwanted signal coupling
through an “OFF” switch.
A measure of the glitch impulse transferred
from the digital input to analog output during
switching.
ADG661/ADG662/ADG663
Typical Performance Characteristics
50
50
50
VDD = +5V
VSS = –5V
40
30
30
30
20
+858C
20
RON – V
40
10
0
–5 –4 –3 –2
Figure 1. On Resistance as a
Function of VD (VS) Dual Supplies
Figure 2. On Resistance as a
Function of VD (VS) for
Different Temperatures
0
2
3
4
0
1
5
VD OR VS – DRAIN OR SOURCE VOLTAGE – V
Figure 3. On Resistance as a
Function of VD (VS) Single Supply
10
LEAKAGE CURRENT – nA
100mA
4 SW
10mA
1 SW
1mA
I–, I+
120
VDD = +5V
VSS = –5V
VDD = +5V
VSS = –5V
VS = 65V
VD = 65V
1
OFF ISOLATION – dB
10mA
VDD = +5V
VSS = –5V
20
10
0
1
2
3
4
5
–5 –4 –3 –2 –1 0
VD OR VS – DRAIN OR SOURCE VOLTAGE – V
–1 0
1
2 3
4
5
VD OR VS – DRAIN OR SOURCE VOLTAGE – V
1mA
VDD = +5V
VSS = 0V
+258C
VDD = +5V
VSS = –5V
10
ISUPPLY
TA = +25°C
40
RON – V
RON – V
TA = +258C
ID (OFF)
0.1
ID (ON)
0.01
100
80
60
100nA
IS (OFF)
10nA
0.001
10
100
10k 100k 1M
1k
FREQUENCY – Hz
25
10M
Figure 4. Supply Current vs. Input
Switching Frequency
0.000
95
105
40
100
1k
10k
100k
FREQUENCY – Hz
1M
10M
Figure 6. Off Isolation vs.
Frequency
110
VDD = +5V
VSS = –5V
TA = +258C
VDD = +5V
VSS = –5V
ID(ON)
100
ID(OFF)
IS(OFF)
–0.002
–0.004
–0.006
–5 –4 –3 –2 –1 0
1
2
3
4
5
VD OR VS – DRAIN OR SOURCE VOLTAGE
Figure 7. Leakage Currents as a
Function of VD (VS)
CROSSTALK – dB
LEAKAGE CURRENT – nA
0.002
45
55 65 75
85
TEMPERATURE – 8C
Figure 5. Leakage Currents as a
Function of Temperature
0.006
0.004
35
90
80
70
60
100
1k
10k
100k
FREQUENCY – Hz
1M
10M
Figure 8. Crosstalk vs. Frequency
–6–
REV. 0
ADG661/ADG662/ADG663
Test Circuits
IDS
ID (OFF)
IS (OFF)
V1
S
A
S
VS
D
D
ID (ON)
S
A
VD
VS
3. On Leakage
2. Off Leakage
VDD
0.1mF
3V
VDD
S
VS
D
VIN
ADG661
VIN
ADG662
VOUT
RL
300V
IN
50%
50%
50%
50%
3V
CL
35pF
90%
90%
VOUT
VSS
GND
0.1mF
VSS
tON
tOFF
4. Switching Times
VDD
0.1mF
3V
VIN
VDD
VS1
VS2
S1
D1
S2
VIN
VOUT1
VOUT2
D2
RL2
300V
IN1, IN2
GND
50%
0V
RL1
300V
50%
90%
90%
VOUT1
CL1
35pF
0V
CL2
35pF
VSS
90%
VOUT2
90%
0V
tD
0.1mF
VSS
tD
5. Break-Before-Make Time Delay
VDD
3V
VDD
RS
VS
S
D
VOUT
VIN
CL
10nF
IN
VOUT
GND
VSS
DVOUT
QINJ = CL 3 DVOUT
VSS
6. Charge Injection
–7–
A
VD
VS
RON = V1/IDS
1. On Resistance
REV. 0
D
ADG661/ADG662/ADG663
APPLICATION
Test Circuits (Continued)
VDD
0.1mF
VDD
S
D
Due to switch and capacitor leakage, the voltage on the hold
capacitor will decrease with time. The ADG661/ADG662/
ADG663 minimizes this droop due to its low leakage specifications. The droop rate is further minimized by the use of a polystyrene hold capacitor. The droop rate for the circuit shown is
typically 15 µV/µs.
VOUT
RL
50V
VS
VIN
IN
VSS
GND
A second switch SW2, which operates in parallel with SW1, is
included in this circuit to reduce pedestal error. Since both
switches will be at the same potential, they will have a differential effect on the op amp OP07 which will minimize charge
injection effects. Pedestal error is also reduced by the compensation network RC and CC. This compensation network also reduces the hold time glitch while optimizing the acquisition time.
Using the illustrated op amps and component values, the pedestal error has a maximum value of 5 mV over the ± 3 V input
range. The acquisition time is 2.5 ms while the settling time is
1.85 µs.
0.1mF
VSS
7. Off Isolation
VDD
0.1mF
VDD
S
50V
D
C3257–8–1/98
Figure 9 illustrates a precise, sample-and-hold circuit. An
AD845 is used as the input buffer while the output operational
amplifier is an OP07. During the track mode, SW1 is closed and
the output VOUT follows the input signal VIN. In the hold mode,
SW1 is opened and the signal is held by the hold capacitor CH.
+5V
VIN1
VS
2200pF
VIN2
+5V
SW1
D
GND
+5V
NC
S
VIN
VSS
AD845
0.1mF
VSS
CHANNEL TO CHANNEL
CROSSTALK = 20 3 LOG VS/VOUT
D
SW2
S
D
RC
75V
CC
1000pF
CH
2200pF
OP07
VOUT
–5V
–5V
ADG661
ADG662
ADG663
8. Channel-to-Channel Crosstalk
–5V
Figure 9. Accurate Sample-and-Hold
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
16-Lead TSSOP
(RU-16)
16
PRINTED IN U.S.A.
0.201 (5.10)
0.193 (4.90)
9
0.256 (6.50)
0.246 (6.25)
RL
50V
0.177 (4.50)
0.169 (4.30)
VOUT
S
1
8
PIN 1
0.006 (0.15)
0.002 (0.05)
0.0256
SEATING (0.65)
PLANE BSC
0.0433
(1.10)
MAX
0.0118 (0.30)
0.0075 (0.19)
8°
0°
0.0079 (0.20)
0.0035 (0.090)
–8–
0.028 (0.70)
0.020 (0.50)
REV. 0