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CMOS Low Voltage 2 SPST Switches ADG701/ADG702
FEATURES
1.8 V to 5.5 V single supply 2 (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 W TTL/CMOS compatible
FUNCTIONAL BLOCK DIAGRAM
ADG701
S D S
ADG702
D
IN
IN
00039-001
SWITCHES SHOWN FOR A LOGIC 1 INPUT
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. Very low RON (3 max at 5 V, 5 max at 3 V). At 1.8 V operation, RON is typically 40 over the temperature range. On resistance flatness RFLAT(ON) (1 max). -3 dB bandwidth > 200 MHz. Low power dissipation. CMOS construction ensures low power dissipation. Fast tON/tOFF. Tiny 5-lead SOT-23, 6-lead SOT-23, and 8-lead MSOP packages.
APPLICATIONS
Battery powered systems Communication systems Sample hold systems Audio signal routing Video switching Mechanical reed relay replacement
2. 3.
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.
4. 5. 6. 7.
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 (c) 2004 Analog Devices, Inc. All rights reserved.
ADG701/ADG702 TABLE OF CONTENTS
Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 Typical Performance Characteristics ............................................. 7 Test Circuits....................................................................................... 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
Rev. B | Page 2 of 12
ADG701/ADG702 SPECIFICATIONS
VDD = 5 V 10%, GND = 0 V. Temperature range for B version is -40C to +85C, unless otherwise noted. Table 1.
Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On-Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS Source OFF Leakage, IS (OFF) Drain OFF Leakage, ID (OFF) Channel ON Leakage, ID, IS (ON) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current IINL or IINH DYNAMIC CHARACTERISTICS1 tON tOFF Charge Injection Off Isolation Bandwidth -3 dB CS (OFF) CD (OFF) CD, CS (ON) POWER REQUIREMENTS IDD +25C B Version -40C to +85C 0 V to VDD 2 3 0.5 4 1.0 0.01 0.25 0.01 0.25 0.01 0.25 Unit V typ max typ max nA typ nA max nA typ nA max nA typ nA max V min V max A typ A max ns typ ns max ns typ ns max pC typ dB typ dB typ MHz typ pF typ pF typ pF typ VIN = VINL or VINH Test Conditions/Comments
VS = 0 V to VDD, IS = -10 mA; Figure 11 VS = 0 V to VDD, IS = -10 mA VDD = 5.5 V VS = 4.5 V/1 V, VD = 1 V/4.5 V; Figure 12 VS = 4.5 V/1 V, VD = 1 V/4.5 V; Figure 12 VS = VD = 1 V, or 4.5 V; Figure 13
0.35 0.35 0.35 2.4 0.8
0.005 0.1 12 18 8 12 5 -55 -75 200 17 17 38
RL = 300 , CL = 35 pF VS = 3 V; Figure 14 RL = 300 , CL = 35 pF VS = 3 V; Figure 14 VS = 2 V, RS = 0 , CL = 1 nF; Figure 15 RL = 50 , CL = 5 pF, f = 10 MHz RL = 50 , CL = 5 pF, f = 1 MHz; Figure 16 RL = 50 , CL = 5 pF; Figure 17
VDD = 5.5 V Digital inputs = 0 V or 5 V 0.001 1.0 A typ A max
1
Guaranteed by design, not subject to production test.
Rev. B | Page 3 of 12
ADG701/ADG702
VDD = 3 V 10%, GND = 0 V. Temperature range for B version is -40C to +85C, unless otherwise noted. Table 2.
Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On-Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS Source OFF Leakage IS(OFF) Drain OFF Leakage ID(OFF) Channel ON Leakage ID, IS(ON) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current IINL or IINH DYNAMIC CHARACTERISTICS1 tON tOFF Charge Injection Off Isolation +25C B Version -40C to +85C 0 V to VDD 3.5 5 1.5 0.01 0.25 0.01 0.25 0.01 0.25 6 Unit V typ max typ nA typ nA max nA typ nA max nA typ nA max V min V max A typ A max ns typ ns max ns typ ns max pC typ dB typ dB typ MHz typ pF typ pF typ pF typ VDD = 3.3 V Digital Inputs = 0 V or 3 V 0.001 1.0 A typ A max VIN = VINL or VINH Test Conditions/Comments
VS = 0 V to VDD, IS = -10 mA; Figure 11 VS = 0 V to VDD, IS = -10 mA VDD = 3.3 V VS = 3 V/1 V, VD = 1 V/3 V; Figure 12 VS = 3 V/1 V, VD = 1 V/3 V; Figure 12 V = VD = 1 V, or 3 V; Figure 13
0.35 0.35 0.35 2.0 0.4
0.005 0.1 14 20 8 13 4 -55 -75 200 17 17 38
RL = 300 , CL = 35 pF VS = 2 V, Figure 14 RL = 300 , CL = 35 pF VS = 2 V, Figure 14 VS = 1.5 V, RS = 0 , CL = 1 nF; Figure 15 RL = 50 , CL = 5 pF, f = 10 MHz RL = 50 , CL = 5 pF, f = 1 MHz; Figure 16 RL = 50 , CL = 5 pF; Figure 17
Bandwidth -3 dB CS (OFF) CD (OFF) CD, CS (ON) POWER REQUIREMENTS IDD
1
Guaranteed by design, not subject to production test.
Rev. B | Page 4 of 12
ADG701/ADG702 ABSOLUTE MAXIMUM RATINGS
TA = +25C, unless otherwise noted. Table 3.
Parameter VDD to GND Analog, Digital Inputs1 Rating -0.3 V to +7 V -0.3 V to VDD +0.3 V or 30 mA, whichever occurs first 30 mA 100 mA, pulsed at 1 ms, 10% duty cycle max -40C to +85C -65C to +150C 150C 315 mW 206C/W 44C/W 282 mW 229.6C/W 91.99C/W 215C 220C 2 kV
Continuous Current, S or D Peak Current, S or D Operating Temperature Range Industrial (B Version) Storage Temperature Range Junction Temperature MSOP Package, Power Dissipation JA Thermal Impedance JC Thermal Impedance SOT-23 Package, Power Dissipation JA Thermal Impedance JC Thermal Impedance Lead Temperature, Soldering Vapor Phase (60 sec) Infrared (15 sec) ESD
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 0 1 ADG702 In 1 0 Switch Condition OFF ON
1
Overvoltages at IN, S, or D are clamped by internal diodes. Current should be limited to the maximum ratings given.
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.
Rev. B | Page 5 of 5
ADG701/ADG702 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
D1 NC 2 NC 3
8
S GND
D1
S2
6
00039-002
NC = NO CONNECT
NC = NO CONNECT
Figure 2. 8-Lead MSOP
Figure 3. 6-Lead SOT-23
00039-003
6 IN TOP VIEW VDD 4 (Not to Scale) 5 NC
TOP VIEW GND 3 (Not to Scale)
4
IN
Figure 4. 5-Lead SOT-23
Table 5. Pin Descriptions
Term VDD GND S D IN RON RFLAT(ON) IS (OFF) ID (OFF) ID, IS (ON) VD (VS) CS (OFF) CD (OFF) CD, CS (ON) tON tOFF Off Isolation Charge Injection Bandwidth On Response On Loss Description Most positive power supply potential. 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. Flatness is defined as the difference between the maximum and minimum value of on resistance as measured over the specified analog signal range. 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 and S. OFF Switch Source Capacitance. OFF Switch Drain Capacitance. ON Switch Capacitance. Delay between applying the digital control input and the output switching on. See Figure 14. Delay between applying the digital control input and the output switching off. A measure of unwanted signal coupling through an OFF switch. A measure of the glitch impulse transferred from the digital input to the analog output during switching. The frequency at which the output is attenuated by -3 dBs. The frequency response of the ON switch. 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.
Rev. B | Page 6 of 12
00039-004
ADG701/ ADG702
7
5 NC TOP VIEW GND 3 (Not to Scale) 4 IN
ADG701/ ADG702
VDD
D1 S2
5
ADG701/ ADG702
VDD
ADG701/ADG702 TYPICAL PERFORMANCE CHARACTERISTICS
3.5 VDD = 2.7V 3.0 2.5 VDD = 3.0V VDD = 4.5V TA = 25C
10m
VDD = 5V
1m 100
ISUPPLY (A)
00039-005
RON ()
2.0 1.5 VDD = 5.0V 1.0 0.5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VD OR VS - DRAIN OR SOURCE VOLTAGE (V)
10 1 100n
5.0
1n 10
100
1k
10k 100k FREQUENCY (Hz)
1M
10M
Figure 5. On Resistance as a Function of VD (VS) Single Supplies
3.5 VDD = 3V 3.0 +85C +25C
Figure 8. Supply Current vs. Input Switching Frequency
-10 -20 -30
OFF ISOLATION (dB)
VDD = 5V, 3V
2.5
-40 -50 -60 -70 -80 -90
RON ()
2.0 1.5 1.0 0.5 0 0
-40C
00039-006
-100 -110 10k 100k 1M 10M FREQUENCY (Hz) 100M
0.5 1.0 1.5 2.0 2.5 VD OR VS - DRAIN OR SOURCE VOLTAGE (V)
3.0
Figure 6. On Resistance as a Function of VD (VS) for Different Temperatures VDD = 3 V
3.5 VDD = 5V 3.0 2.5 +85C
Figure 9. Off Isolation vs. Frequency
0 VDD = 3V
ON RESPONSE (dB)
-2
RON ()
2.0 +25C 1.5 -40C 1.0 0.5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VD OR VS - DRAIN OR SOURCE VOLTAGE (V)
-4
00039-007
5.0
-6 10k
100k
1M 10M FREQUENCY (Hz)
100M
Figure 7. On Resistance as a Function of VD (VS) for Different Temperatures VDD = 5 V
Figure 10. On Response vs. Frequency
Rev. B | Page 7 of 12
00039-010
00039-009
00039-008
10n
ADG701/ADG702 TEST CIRCUITS
IDS V1
IS (OFF) A
00039-011
S
D
ID (OFF) S D A VD
00039-012
S
D
ID (ON) A VD
00039-013
VS
RON = V1/IDS
VS
VS
Figure 11. On Resistance
VDD 0.1F
Figure 12. Off Leakage
Figure 13. On Leakage
VIN ADG701 VDD S VS D RL 300 VOUT VIN CL 35pF VOUT GND
50%
50%
ADG702
50% 90%
50% 90%
00039-014 00039-015
IN
tON
tOFF
Figure 14. Switching Times
VDD
VDD RS VS IN GND S D CL 1nF VOUT
VIN
ADG701
ON OFF
VIN
ADG702
QINJ = CL x VOUT VOUT
VOUT
Figure 15. Charge Injection
VDD 0.1F
0.1F VDD
VDD S D RL 50
VS VIN
VDD
VOUT
S
D RL 50
VOUT
IN VS VIN GND
IN GND
00039-016
Figure 16. Off Isolation
Figure 17. Bandwidth
Rev. B | Page 8 of 12
00039-017
ADG701/ADG702 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. 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 capacitance and low on resistance. The on response versus frequency for the ADG701/ADG702 can be seen in Figure 10.
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 over the temperature range.
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.
CDS S CD D VOUT VIN
00039-019
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 performance. These capacitances affect feedthrough, crosstalk, and system bandwidth.
CDS S RON VIN CD D VOUT
00039-018
CLOAD
RLOAD
Figure 19. Off Isolation Is Affected by External Load Resistance and Capacitance
CLOAD RLOAD
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.
s(RON C DS ) + 1 A(s) = RT s(RON CT RT ) + 1
Where CT = CLOAD + CD + CDS.
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.
s(RLOADC DS ) + 1 A(s) = RT s(RLOAD )(CT ) + 1
Rev. B | Page 9 of 12
ADG701/ADG702 OUTLINE DIMENSIONS
3.00 BSC
8
5
3.00 BSC
4
4.90 BSC
PIN 1 0.65 BSC 1.10 MAX 8 0 0.80 0.60 0.40
0.15 0.00 0.38 0.22 COPLANARITY 0.10
0.23 0.08 SEATING PLANE
COMPLIANT TO JEDEC STANDARDS MO-187AA
Figure 20. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters
2.90 BSC
6
5
4
1.60 BSC
1 2 3
2.80 BSC
PIN 1 INDICATOR 0.95 BSC 1.30 1.15 0.90 1.90 BSC
1.45 MAX
0.22 0.08 10 4 0 0.60 0.45 0.30
0.15 MAX
0.50 0.30
SEATING PLANE
COMPLIANT TO JEDEC STANDARDS MO-178AB
Figure 21. 6-Lead Plastic Surface Mount Package [SOT-23] (RT-6) Dimensions shown in inches and (millimeters)
Rev. B | Page 10 of 12
ADG701/ADG702
2.90 BSC
5
4
1.60 BSC
1
2.80 BSC
2 3
PIN 1 0.95 BSC 1.30 1.15 0.90 1.90 BSC
1.45 MAX
0.22 0.08 10 5 0 0.60 0.45 0.30
0.15 MAX
0.50 0.30
SEATING PLANE
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 ADG701BRJ-500RL7 ADG701BRJ-REEL ADG701BRJ-REEL7 ADG701BRM ADG701BRM-REEL ADG701BRM-REEL7 ADG701BRT ADG701BRT-REEL ADG701BRT-REEL7 ADG701BRTZ-REEL2 ADG701BRTZ-REEL72 ADG702BRJ-500RL7 ADG702BRJ-REEL ADG702BRJ-REEL7 ADG702BRM ADG702BRM-REEL ADG702BRM-REEL7 ADG702BRT ADG702BRT-REEL ADG702BRT-REEL7 ADG702BRTZ-REEL2 ADG702BRTZ-REEL72 Temperature Range -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C Package Descriptions SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) MSOP (Small Outline) MSOP (Small Outline) MSOP (Small Outline) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) MSOP (Small Outline) MSOP (Small Outline) MSOP (Small Outline) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) SOT-23 (Plastic Surface Mount) Package Options RJ-5 RJ-5 RJ-5 RM-8 RM-8 RM-8 RT-6 RT-6 RT-6 RT-6 RT-6 RJ-5 RJ-5 RJ-5 RM-8 RM-8 RM-8 RT-6 RT-6 RT-6 RT-6 RT-6 Brand1 S3B S3B S3B S3B S3B S3B S3B S3B S3B S3B S3B S4B S4B S4B S4B S4B S4B S4B S4B S4B S4B S4B
1 2
Brand = Due to package size limitations, these three characters represent the part number. Z = Pb-free part.
Rev. B | Page 11 of 12
ADG701/ADG702 NOTES
(c) 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00039-0-6/04(B)
Rev. B | Page 12 of 12

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