CMOS Low Voltage
2 Ω SPST Switches
ADG701/ADG702
Rev. B
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
FEATURES
1.8 V to 5.5 V single supply
2 Ω (typ) on resistance
Low on-resistance flatness
–3 dB bandwidth > 200 MHz
Rail-to-rail operation
Fast switching times:
tON 18 ns
tOFF 12 ns
Typical power consumption < 0.01 µW
TTL/CMOS compatible
APPLICATIONS
Battery powered systems
Communication systems
Sample hold systems
Audio signal routing
Video switching
Mechanical reed relay replacement
GENERAL DESCRIPTION
The ADG701/ADG702 are monolithic CMOS SPST switches.
These switches are designed on an advanced submicron process
that provides low power dissipation yet high switching speed,
low on resistance, and low leakage currents. In addition, −3 dB
bandwidths of greater than 200 MHz can be achieved.
The ADG701/ADG702 can operate from a single 1.8 V to 5.5 V
supply, making it ideal for use in battery-powered instruments
and with the new generation of DACs and ADCs from Analog
Devices.
Figure 1 shows that with a logic input of 1, the switch of the
ADG701 is closed, while that of the ADG702 is open. Each
switch conducts equally well in both directions when on.
The ADG701/ADG702 are available in 5-lead SOT-23, 6-lead
SOT-23, and 8-lead MSOP packages.
FUNCTIONAL BLOCK DIAGRAM
D
S
IN
ADG701
DS
IN
ADG702
SWITCHES SHOWN FOR A LOGIC 1 INPUT
00039-001
Figure 1.
PRODUCT HIGHLIGHTS
1. 1.8 V to 5.5 V single-supply operation. The ADG701/
ADG702 offer high performance, including low on
resistance and fast switching times, and are fully specified
and guaranteed with 3 V and 5 V supply rails.
2. Ver y low RON (3 Ω max at 5 V, 5 Ω max at 3 V). At 1.8 V
operation, RON is typically 40 Ω over the temperature range.
3. On resistance flatness RFLAT(ON) (1 Ω max).
4. −3 dB bandwidth > 200 MHz.
5. Low power dissipation. CMOS construction ensures low
power dissipation.
6. Fast tON/tOFF.
7. Tiny 5-lead SOT-23, 6-lead SOT-23, and 8-lead MSOP
packages.
ADG701/ADG702
Rev. B | Page 2 of 12
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Test Circ uits ....................................................................................... 8
Applications Information.................................................................9
ADG701/ADG702 Supply Voltages............................................9
On Response vs. Frequency .........................................................9
Off Isolation...................................................................................9
Outline Dimensions....................................................................... 10
Ordering Guide .......................................................................... 11
REVISION HISTORY
6/04—Data Sheet Changed from Rev. A to Rev. B
Updated Format.................................................................. Universal
Added 5-Lead SOT-23 Package ........................................ Universal
Updated Outline Dimensions ........................................................10
Changes to Ordering Guide ...........................................................11
8/98—Data Sheet Changed from Rev. 0 to Rev. A
ADG701/ADG702
Rev. B | Page 3 of 12
SPECIFICATIONS
VDD = 5 V ± 10%, GND = 0 V. Temperature range for B version is −40°C to +85°C, unless otherwise noted.
Table 1.
B Version
Parameter +25°C –40°C to +85°C Unit Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range 0 V to VDD V
On Resistance (RON) 2 Ω typ VS = 0 V to VDD, IS = –10 mA; Figure 11
3 4 Ω max
On-Resistance Flatness (RFLAT(ON)) 0.5 Ω typ VS = 0 V to VDD, IS = –10 mA
1.0 Ω max
LEAKAGE CURRENTS VDD = 5.5 V
Source OFF Leakage, IS (OFF) ±0.01 nA typ VS = 4.5 V/1 V, VD = 1 V/4.5 V; Figure 12
±0.25 ±0.35 nA max
Drain OFF Leakage, ID (OFF) ±0.01 nA typ VS = 4.5 V/1 V, VD = 1 V/4.5 V; Figure 12
±0.25 ±0.35 nA max
Channel ON Leakage, ID, IS (ON) ±0.01 nA typ VS = VD = 1 V, or 4.5 V; Figure 13
±0.25 ±0.35 nA max
DIGITAL INPUTS
Input High Voltage, VINH 2.4 V min
Input Low Voltage, VINL 0.8 V max
Input Current
IINL or IINH 0.005 µA typ VIN = VINL or VINH
±0.1 µA max
DYNAMIC CHARACTERISTICS1
tON 12 ns typ RL = 300 Ω , CL = 35 pF
18 ns max VS = 3 V; Figure 14
tOFF 8 ns typ RL = 300 Ω , CL = 35 pF
12 ns max VS = 3 V; Figure 14
Charge Injection 5 pC typ VS = 2 V, RS = 0 Ω , CL = 1 nF; Figure 15
Off Isolation –55 dB typ RL = 50 Ω , CL = 5 pF, f = 10 MHz
–75 dB typ RL = 50 Ω , CL = 5 pF, f = 1 MHz; Figure 16
Bandwidth –3 dB 200 MHz typ RL = 50 Ω , CL = 5 pF; Figure 17
CS (OFF) 17 pF typ
CD (OFF) 17 pF typ
CD, CS (ON) 38 pF typ
POWER REQUIREMENTS VDD = 5.5 V
Digital inputs = 0 V or 5 V
IDD 0.001 µA typ
1.0 µA max
1 Guaranteed by design, not subject to production test.
ADG701/ADG702
Rev. B | Page 4 of 12
VDD = 3 V ±10%, GND = 0 V. Temperature range for B version is −40°C to +85°C, unless otherwise noted.
Table 2.
B Version
Parameter +25°C −40°C to +85°C Unit Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range 0 V to VDD V
On Resistance (RON) 3.5 Ω typ VS = 0 V to VDD, IS = −10 mA; Figure 11
5 6 Ω max
On-Resistance Flatness (RFLAT(ON)) 1.5 Ω typ VS = 0 V to VDD, IS = −10 mA
LEAKAGE CURRENTS VDD = 3.3 V
Source OFF Leakage IS(OFF) ±0.01 nA typ VS = 3 V/1 V, VD = 1 V/3 V; Figure 12
±0.25 ±0.35 nA max
Drain OFF Leakage ID(OFF) ±0.01 nA typ VS = 3 V/1 V, VD = 1 V/3 V; Figure 12
±0.25 ±0.35 nA max
Channel ON Leakage ID, IS(ON) ±0.01 nA typ V = VD = 1 V, or 3 V; Figure 13
±0.25 ±0.35 nA max
DIGITAL INPUTS
Input High Voltage, VINH 2.0 V min
Input Low Voltage, VINL 0.4 V max
Input Current
IINL or IINH 0.005 µA typ VIN = VINL or VINH
±0.1 µA max
DYNAMIC CHARACTERISTICS1
tON 14 ns typ RL = 300 Ω , CL = 35 pF
20 ns max VS = 2 V, Figure 14
tOFF 8 ns typ RL = 300 Ω , CL = 35 pF
13 ns max VS = 2 V, Figure 14
Charge Injection 4 pC typ VS = 1.5 V, RS = 0 Ω , CL = 1 nF; Figure 15
Off Isolation −55 dB typ RL = 50 Ω , CL = 5 pF, f = 10 MHz
−75 dB typ RL = 50 Ω , CL = 5 pF, f = 1 MHz; Figure 16
Bandwidth −3 dB 200 MHz typ RL = 50 Ω , CL = 5 pF; Figure 17
CS (OFF) 17 pF typ
CD (OFF) 17 pF typ
CD, CS (ON) 38 pF typ
POWER REQUIREMENTS VDD = 3.3 V
Digital Inputs = 0 V or 3 V
IDD 0.001 µA typ
1.0 µA max
1 Guaranteed by design, not subject to production test.
ADG701/ADG702
Rev. B | Page 5 of 5
ABSOLUTE MAXIMUM RATINGS
TA = +25°C, unless otherwise noted.
Table 3.
Parameter Rating
VDD to GND −0.3 V to +7 V
Analog, Digital Inputs1 −0.3 V to VDD +0.3 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
MSOP Package, Power Dissipation 315 mW
θJA Thermal Impedance 206°C/W
θJC Thermal Impedance 44°C/W
SOT-23 Package, Power Dissipation 282 mW
θJA Thermal Impedance 229.6°C/W
θJC Thermal Impedance 91.99°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
ESD 2 kV
1 Overvoltages at IN, S, or D are clamped by internal diodes. Current should be
limited to the maximum ratings given.
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.
Table 4. Truth Table
ADG701 In ADG702 In Switch Condition
0 1 OFF
1 0 ON
ESD 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 this product 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.
ADG701/ADG702
Rev. B | Page 6 of 12
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
00039-002
NC = NO CONNECT
ADG701/
ADG702
TOP VIEW
(Not to Scale)
D
1
NC
2
NC
3
V
DD 4
S
GND
IN
NC
8
7
6
5
00039-003
NC = NO CONNECT
ADG701/
ADG702
TOP VIEW
(Not to Scale)
D
1
S
2
G
ND
3
V
DD
6
NC
5
IN
4
00039-004
ADG701/
ADG702
TOP VIEW
(Not to Scale)
D
1
S
2
G
ND
3
V
DD
5
IN
4
Figure 2. 8-Lead MSOP Figure 3. 6-Lead SOT-23 Figure 4. 5-Lead SOT-23
Table 5. Pin Descriptions
Term Description
VDD Most positive power supply potential.
GND Ground (0 V) Reference.
S Source Terminal. May be an input or output.
D Drain Terminal. May be an input or output.
IN Logic Control Input.
RON Ohmic resistance between D and S.
RFLAT(ON) Flatness is defined as the difference between the maximum and minimum value of on resistance as measured
over the specified analog signal range.
IS (OFF) Source Leakage Current with the Switch OFF.
ID (OFF) Drain Leakage Current with the Switch OFF.
ID, IS (ON) Channel Leakage Current with the Switch ON.
VD (VS) Analog Voltage on Terminals D and S.
CS (OFF) OFF Switch Source Capacitance.
CD (OFF) OFF Switch Drain Capacitance.
CD, CS (ON) ON Switch Capacitance.
tON Delay between applying the digital control input and the output switching on. See Figure 14.
tOFF Delay between applying the digital control input and the output switching off.
Off Isolation A measure of unwanted signal coupling through an OFF switch.
Charge Injection A measure of the glitch impulse transferred from the digital input to the analog output during switching.
Bandwidth The frequency at which the output is attenuated by −3 dBs.
On Response The frequency response of the ON switch.
On Loss The voltage drop across the ON switch seen in Figure 10 as the number of dBs the signal is from 0 dB at very low
frequencies.
ADG701/ADG702
Rev. B | Page 7 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
3.5
0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
00039-005
V
D
OR V
S
– DRAIN OR SOURCE VOLTAGE (V)
R
ON
(Ω)
V
DD
= 2.7V T
A
= 25°C
V
DD
= 3.0V
V
DD
= 5.0V
V
DD
= 4.5V
Figure 5. On Resistance as a Function of VD (VS) Single Supplies
3.5
0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1.0 1.5 2.0 2.5 3.0
00039-006
V
D
OR V
S
– DRAIN OR SOURCE VOLTAGE (V)
R
ON
(Ω)
+85°C
+25°C
–40°C
V
DD
= 3V
Figure 6. On Resistance as a Function of VD (VS) for Different Temperatures
VDD = 3 V
3.5
0
0.5
1.0
1.5
2.0
2.5
3.0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
00039-007
V
D
OR V
S
– DRAIN OR SOURCE VOLTAGE (V)
R
ON
(Ω)
V
DD
= 5V
+85°C
+25°C
–40°C
Figure 7. On Resistance as a Function of VD (VS) for Different Temperatures
VDD = 5 V
10m
1n
10n
100n
1µ
10µ
100µ
1m
10 100 1k 10k 100k 1M 10M
00039-008
FREQUENCY (Hz)
I
SUPPLY
(A)
V
DD
= 5V
Figure 8. Supply Current vs. Input Switching Frequency
–10
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
10k 100k 1M 10M 100M
00039-009
FREQUENCY (Hz)
OFF ISOLATION (dB)
V
DD
= 5V, 3V
Figure 9. Off Isolation vs. Frequency
0
–6
–4
–2
10k 100k 1M 10M 100M
00039-010
FREQUENCY (Hz)
ON RESPONSE (dB)
V
DD
= 3V
Figure 10. On Response vs. Frequency
ADG701/ADG702
Rev. B | Page 8 of 12
TEST CIRCUITS
SD
V
S
R
ON
= V1/I
DS
I
DS
V1
00039-011
SD
V
S
V
D
I
S
(OFF) I
D
(OFF)
A A
00039-012
SD
V
S
V
D
I
D
(ON)
A
00039-013
Figure 11. On Resistance Figure 12. Off Leakage Figure 13. On Leakage
0.1µF
IN
SD
VDD
RL
300ΩCL
35pF
VOUT
VOUT
t
ON
t
OFF
VIN
VIN
VDD
GND
ADG701
ADG702
50% 50%
90% 90%
50% 50%
VS
00039-014
Figure 14. Switching Times
00039-015
V
IN
V
IN
V
OUT
ON OFF
∆V
OUT
IN
GND
V
DD
V
DD
C
L
1nF
V
OUT
S
R
S
V
S
D
Q
INJ
= C
L
×∆V
OUT
ADG701
ADG702
Figure 15. Charge Injection
00039-016
V
DD
R
L
50Ω
0.1µF
V
OUT
V
IN
V
S
V
DD
IN
SD
GND
Figure 16. Off Isolation
00039-017
V
DD
R
L
50Ω
0.1µF
V
OUT
V
IN
V
S
V
DD
IN
SD
GND
Figure 17. Bandwidth
ADG701/ADG702
Rev. B | Page 9 of 12
APPLICATIONS INFORMATION
The ADG701/ADG702 belong to Analog Devices’ new family
of CMOS switches. This series of general-purpose switches
have improved switching times, lower on resistance, higher
bandwidth, low power consumption, and low leakage currents.
ADG701/ADG702 SUPPLY VOLTAGES
Functionality of the ADG701/ADG702 extends from 1.8 V to
5.5 V single supply, making the parts ideal for battery-powered
instruments, where power efficiency and performance are
important design parameters.
It is important to note that the supply voltage affects the input
signal range, the on resistance, and the switching times of the
part. The effects of the power supplies can be clearly seen in the
Typical Performance Characteristics and the Specifications
sections.
For VDD = 1.8 V operation, RON is typically 40 Ω over the
temperature range.
ON RESPONSE VS. FREQUENCY
Figure 18 illustrates the parasitic components that affect the ac
performance of CMOS switches (a box surrounds the switch).
Additional external capacitances further degrade some per-
formance. These capacitances affect feedthrough, crosstalk,
and system bandwidth.
00039-018
V
IN
SD
R
ON
C
DS
C
D
C
LOAD
R
LOAD
V
OUT
Figure 18. Switch Represented by Equivalent Parasitic Components
The transfer function that describes the equivalent diagram of
the switch (Figure 18) is of the form (A)s shown below.
⎥
⎦
⎤
⎢
⎣
⎡
+
+
=1)(
1)(
)(
TT
ON
DSON
TRCRs
CRs
RsA
Where CT = CLOAD + CD + CDS.
The signal transfer characteristic is dependent on the switch
channel capacitance, CDS. This capacitance creates a frequency
zero in the numerator of the transfer function A(s). Because the
switch on resistance is small, this zero usually occurs at high
frequencies. The bandwidth is a function of the switch output
capacitance combined with CDS and the load capacitance. The
frequency pole corresponding to these capacitances appears in
the denominator of A(s).
The dominant effect of the output capacitance, CD, causes the
pole breakpoint frequency to occur first. In order to maximize
bandwidth, a switch must have a low input and output capaci-
tance and low on resistance. The on response versus frequency
for the ADG701/ADG702 can be seen in Figure 10.
OFF ISOLATION
Off isolation is a measure of the input signal coupled through
an off switch to the switch output. The capacitance, CDS, couples
the input signal to the output load, when the switch is off, as
shown in Figure 19.
00039-019
V
IN
SD
C
DS
C
D
C
LOAD
R
LOAD
V
OUT
Figure 19. Off Isolation Is Affected by External Load Resistance and
Capacitance
The larger the value of CDS, the larger the values of feedthrough
produced. Figure 9 illustrates the drop in off isolation as a
function of frequency. From dc to roughly 1 MHz, the switch
shows better than −75 dB isolation. Up to frequencies of 10
MHz, the off isolation remains better than −55 dB. As the
frequency increases, more and more of the input signal is
coupled through to the output. Off isolation can be maximized
by choosing a switch with the smallest CDS possible. The values
of load resistance and capacitance also affect off isolation, as
they contribute to the coefficients of the poles and zeros in the
transfer function of the switch when open.
⎥
⎦
⎤
⎢
⎣
⎡
+
+
=1))((
1)(
)(
T
LOAD
DSLOAD
TCRs
CRs
RsA
ADG701/ADG702
Rev. B | Page 10 of 12
OUTLINE DIMENSIONS
0.80
0.60
0.40
8°
0°
4
85
4.90
BSC
PIN 1 0.65 BSC
3.00
BSC
SEATING
PLANE
0.15
0.00
0.38
0.22
1.10 MAX
3.00
BSC
COPLANARITY
0.10
0.23
0.08
COMPLIANT TO JEDEC STANDARDS MO-187AA
Figure 20. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
1 3
45
2
6
2.90 BSC
1.60 BSC 2.80 BSC
1.90
BSC
0.95 BSC
0.22
0.08 10°
4°
0°
0.50
0.30
0.15 MAX
1.30
1.15
0.90
SEATING
PLANE
1.45 MAX
0.60
0.45
0.30
PIN 1
INDICATOR
COMPLIANT TO JEDEC STANDARDS MO-178AB
Figure 21. 6-Lead Plastic Surface Mount Package [SOT-23]
(RT-6)
Dimensions shown in inches and (millimeters)
ADG701/ADG702
Rev. B | Page 11 of 12
PIN 1
1.60 BSC 2.80 BSC
1.90
BSC
0.95 BSC
1
3
4 5
2
0.22
0.08 10°
5°
0°
0.50
0.30
0.15 MAX SEATING
PLANE
1.45 MAX
1.30
1.15
0.90
2.90 BSC
0.60
0.45
0.30
COMPLIANT TO JEDEC STANDARDS MO-178AA
Figure 22. 5-Lead Plastic Surface Mount Package [SOT-23]
(RJ-5)
Dimensions shown in inches and (millimeters)
ORDERING GUIDE
Model Temperature Range Package Descriptions Package Options Brand1
ADG701BRJ-500RL7 −40°C to +85°C SOT-23 (Plastic Surface Mount) RJ-5 S3B
ADG701BRJ-REEL −40°C to +85°C SOT-23 (Plastic Surface Mount) RJ-5 S3B
ADG701BRJ-REEL7 −40°C to +85°C SOT-23 (Plastic Surface Mount) RJ-5 S3B
ADG701BRM −40°C to +85°C MSOP (Small Outline) RM-8 S3B
ADG701BRM-REEL −40°C to +85°C MSOP (Small Outline) RM-8 S3B
ADG701BRM-REEL7 −40°C to +85°C MSOP (Small Outline) RM-8 S3B
ADG701BRT −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S3B
ADG701BRT-REEL −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S3B
ADG701BRT-REEL7 −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S3B
ADG701BRTZ-REEL2−40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S3B
ADG701BRTZ-REEL72 −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S3B
ADG702BRJ-500RL7 −40°C to +85°C SOT-23 (Plastic Surface Mount) RJ-5 S4B
ADG702BRJ-REEL −40°C to +85°C SOT-23 (Plastic Surface Mount) RJ-5 S4B
ADG702BRJ-REEL7 −40°C to +85°C SOT-23 (Plastic Surface Mount) RJ-5 S4B
ADG702BRM −40°C to +85°C MSOP (Small Outline) RM-8 S4B
ADG702BRM-REEL −40°C to +85°C MSOP (Small Outline) RM-8 S4B
ADG702BRM-REEL7 −40°C to +85°C MSOP (Small Outline) RM-8 S4B
ADG702BRT −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S4B
ADG702BRT-REEL −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S4B
ADG702BRT-REEL7 −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S4B
ADG702BRTZ-REEL2 −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S4B
ADG702BRTZ-REEL72 −40°C to +85°C SOT-23 (Plastic Surface Mount) RT-6 S4B
1 Brand = Due to package size limitations, these three characters represent the part number.
2 Z = Pb-free part.
ADG701/ADG702
Rev. B | Page 12 of 12
NOTES
© 2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C00039–0–6/04(B)
