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FEATURES 1.8 V to 5.5 V Single Supply 2.5 On Resistance 0.75 On-Resistance Flatness -3 dB Bandwidth >200 MHz Rail-to-Rail Operation 6-Lead SC70 Package Fast Switching Times t ON 20 ns t OFF 6 ns Typical Power Consumption (<0.01 TTL/CMOS-Compatible APPLICATIONS Battery-Powered Systems Communication Systems Sample Hold Systems Audio Signal Routing Video Switching Mechanical Reed Relay Replacement
CMOS 1.8 V to 5.5 V, 2.5 SPDT Switch/2:1 Mux In Tiny SC70 Package ADG779
FUNCTIONAL BLOCK DIAGRAM
ADG779
S2 D S1
IN
W)
SWITCHES SHOWN FOR A LOGIC "1" INPUT
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The ADG779 is a monolithic CMOS SPDT (single-pole, double-throw) switch. This switch is designed on a submicron process that provides low power dissipation yet gives high switching speed, low on resistance and low leakage currents. The ADG779 operates from a single supply range of 1.8 V to 5.5 V, making it ideal for use in battery-powered instruments and with the new generation of DACs and ADCs from Analog Devices. Each switch of the ADG779 conducts equally well in both directions when on. The ADG779 exhibits break-before-make switching action. Because of the advanced submicron process, -3 dB bandwidth of greater than 200 MHz can be achieved. The ADG779 is available in a 6-lead SC70 package.
1. Tiny 6-Lead SC70 Package. 2. 1.8 V to 5.5 V Single Supply Operation. The ADG779 offers high performance, including low on resistance and fast switching times, and is fully specified and guaranteed with 3 V and 5 V supply rails. 3. Very Low RON (5 max at 5 V, 10 max at 3 V). At 1.8 V operation, RON is typically 40 over the temperature range. 4. On-Resistance Flatness (RFLAT(ON)) (0.75 typ). 5. -3 dB Bandwidth >200 MHz. 6. Low Power Dissipation. CMOS construction ensures low power dissipation. 7. 14 ns Switching Times.
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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. 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 www.analog.com Fax: 781/326-8703 (c) Analog Devices, Inc., 2001
ADG779-SPECIFICATIONS1 (V
Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On Resistance Match Between Channels (RON) On-Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS2 Source OFF Leakage IS (OFF) Channel ON Leakage ID, IS (ON) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current IINL or IINH DYNAMIC CHARACTERISTICS2 tON tOFF Break-Before-Make Time Delay, tD Off Isolation 0.75
DD
=5V
10%, GND = 0 V)
B Version -40 C to 25 C +85 C 0 V to VDD 2 .5 5 6 0.1 0.8 1.2 0.01 0.01 0.05 0.05
Unit V typ max typ max typ max nA typ nA typ
Test Conditions/Comments
VS = 0 V to VDD, IS = -10 mA, Test Circuit 1 VS = 0 V to VDD, IS = -10 mA VS = 0 V to VDD, IS = -10 mA VDD = 5.5 V VS = 4.5 V/1 V, VD = 1 V/4.5 V, Test Circuit 2 VS = VD = 1 V, or VS = VD = 4.5 V, Test Circuit 3
2.4 0.8 0.005 0.1 14 20 3 6 8 1 -67 -87 -62 -82 200 7 27
V min V max A typ A max ns typ ns max ns typ ns max ns typ ns min dB typ dB typ dB typ dB typ MHz typ pF typ pF typ VIN = VINL or VINH
Channel-to-Channel Crosstalk
Bandwidth -3 dB CS (OFF) CD, CS (ON) POWER REQUIREMENTS IDD
RL = 300 , CL = 35 pF VS = 3 V, Test Circuit 4 RL = 300 , CL = 35 pF VS = 3 V, Test Circuit 4 RL = 300 , CL = 35 pF, VS1 = VS2 = 3 V, Test Circuit 5 RL = 50 , CL = 5 pF, f = 10 MHz RL = 50 , CL = 5 pF, f = 1 MHz, Test Circuit 6 RL = 50 , CL = 5 pF, f = 10 MHz RL = 50 , CL = 5 pF, f = 1 MHz, Test Circuit 7 RL = 50 , CL = 5 pF, Test Circuit 8 f = 1 MHz f = 1 MHz VDD = 5.5 V Digital Inputs = 0 V or 5 V
0.001 1.0
A typ A max
NOTES 1 Temperature ranges are as follows: B Version, -40C to +85C. 2 Guaranteed by design, not subject to production test. Specifications subject to change without notice.
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SPECIFICATIONS
Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On Resistance Match Between Channels (RON)
1
ADG779
(VDD = 3 V 10%, GND = 0 V)
B Version -40 C to 25 C +85 C 0 V to VDD 7 10 0.1 0.8 2.5 0.01 0.01 0.05 0.05 Unit V typ max typ max typ nA typ nA typ Test Conditions/Comments
6
VS = 0 V to VDD, IS = -10 mA, Test Circuit 1 VS = 0 V to VDD, IS = -10 mA VS = 0 V to VDD, IS = -10 mA VDD = 3.3 V VS = 3 V/1 V, VD = 1 V/3 V, Test Circuit 2 VS = VD = 1 V, or VS = VD = 3 V, Test Circuit 3
On-Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS Source OFF Leakage IS (OFF) Channel ON Leakage ID, IS (ON) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current IINL or IINH DYNAMIC CHARACTERISTICS2 tON tOFF Break-Before-Make Time Delay, tD Off Isolation
2
2.0 0.8 0.005 0.1 16 24 4 7 8 1 -67 -87 -62 -82 200 7 27
V min V max A typ A max ns typ ns max ns typ ns max ns typ ns min dB typ dB typ dB typ dB typ MHz typ pF typ pF typ VIN = VINL or VINH
Channel-to-Channel Crosstalk
Bandwidth -3 dB CS (OFF) CD, CS (ON) POWER REQUIREMENTS IDD
RL = 300 , CL = 35 pF VS = 2 V, Test Circuit 4 RL = 300 , CL = 35 pF VS = 2 V, Test Circuit 4 RL = 300 , CL = 35 pF VS1 = VS2 = 2 V, Test Circuit 5 RL = 50 , CL = 5 pF, f = 10 MHz RL = 50 , CL = 5 pF, f = 1 MHz, Test Circuit 6 RL = 50 , CL = 5 pF, f = 10 MHz RL = 50 , CL = 5 pF, f = 1 MHz, Test Circuit 7 RL = 50 , CL = 5 pF, Test Circuit 8 f = 1 MHz f = 1 MHz VDD = 3.3 V Digital Inputs = 0 V or 3 V
0.001 1.0
A typ A max
NOTES 1 Temperature ranges are as follows: B Version, -40C to +85C. 2 Guaranteed by design, not subject to production test. Specifications subject to change without notice.
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ADG779
ABSOLUTE MAXIMUM RATINGS 1
(TA = 25C unless otherwise noted)
TERMINOLOGY
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to +7 V Analog, Digital Inputs2 . . . . . . . . . . -0.3 V to VDD + 0.3 V or 30 mA, Whichever Occurs First Peak Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA (Pulsed at 1 ms, 10% Duty Cycle max) Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . . 30 mA Operating Temperature Range Industrial (B Version) . . . . . . . . . . . . . . . . . -40C to +85C Storage Temperature Range . . . . . . . . . . . . . -65C to +150C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150C SC70 Package, Power Dissipation . . . . . . . . . . . . . . . . 315 mW JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 332C/W JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 120C/W Lead Temperature, Soldering Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220C
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.
Table I. Truth Table
ADG779 IN 0 1
Switch S1 ON OFF
Switch S2 OFF ON
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. On resistance match between any two channels i.e., RON max - RON min. 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. Source Leakage Current with the switch "OFF." IS (OFF) ID, IS (ON) Channel Leakage Current with the switch "ON." VD (VS) Analog Voltage on Terminals D, S. CS (OFF) "OFF" Switch Source Capacitance. CD, CS (ON) "ON" Switch Capacitance. tON Delay between applying the digital control input and the output switching on. tOFF Delay between applying the digital control input and the output switching off. tD "OFF" time or "ON" time measured between the 90% points of both switches, when switching from one address state to another. Crosstalk A measure of unwanted signal that is coupled through from one channel to another as a result of parasitic capacitance. Off Isolation A measure of unwanted signal coupling through an "OFF" switch. On Response The frequency response of the "ON" switch. On Loss The loss due to the "ON" resistance of the switch.
VDD GND S D IN RON RON
PIN CONFIGURATION 6-Lead SC70
IN 1 VDD 2 GND 3
6
S2 D S1
ADG779
TOP VIEW (Not to Scale)
5 4
ORDERING GUIDE
Model ADG779BKS
Temperature Range -40C to +85C
Package Description SC70 (Plastic Surface Mount)
Package Option KS-6
Branding Information* SKB
*Brand = Brand on these packages is limited to three characters due to space constraints.
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 ADG779 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.
WARNING!
ESD SENSITIVE DEVICE
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Typical Performance Characteristics- ADG779
6.0 5.5 5.0 4.5 4.0 3.5
RON -
0.15
VDD = 2.7V
TA = 25 C
0.10
VDD = 5V VD = 4.5V/1V VS = 1V/4.5V
VDD = 3.0V
CURRENT - nA
VDD = 4.5V
3.0 2.5 2.0 1.5 1.0 0.5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VD OR VS - DRAIN OR SOURCE VOLTAGE - V VDD = 5.0V
ID, I S (ON) 0.05
0
IS (OFF) -0.05 0 10 20 30 40 50 60 TEMPERATURE - C 70 80 90
TPC 1. On Resistance as a Function of VD (VS) Single Supplies
TPC 4. Leakage Currents as a Function of Temperature
6.0 5.5 5.0 4.5 4.0 -40 C 3.5 +85 C +25 C
CURRENT - nA
0.15
VDD = 3V
VDD = 3V VD = 3V/1V VS = 1V/3V 0.10
RON -
3.0 2.5 2.0 1.5 1.0 0.5 0
0.05
ID, I S (ON)
0
IS (OFF) -0.05
0
0.5 1.0 1.5 2.0 2.5 VD OR VS - DRAIN OR SOURCE VOLTAGE - V
3.0
0
10
20
30 40 50 60 TEMPERATURE - C
70
80
90
TPC 2. On Resistance as a Function of VD (VS) for Different Temperatures VDD = 3 V
6.0 5.5 5.0 4.5 4.0 3.5 +85 C VDD = 5V
TPC 5. Leakage Currents as a Function of Temperature
10m VDD = 5V 1m
100
I SUPPLY - A
3.0 3.5 4.0 4.5 5.0
RON -
10 1
3.0 2.5 2.0 1.5 1.0 +25 C -40 C
100n
10n
0.5 0 0 0.5 1.0 1.5 2.0 2.5
1n
1
10
100
VD OR VS - DRAIN OR SOURCE VOLTAGE - V
1k 10k 100k FREQUENCY - Hz
1M
10M
100M
TPC 3. On Resistance as a Function of VD (VS) for Different Temperatures VDD = 5 V
TPC 6. Supply Current vs. Input Switching Frequency
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ADG779
-30 VDD = 5V, 3V -40 -50
OFF ISOLATION - dB
0 VDD = 5V
ON RESPONSE - dB
100k 1M 10M FREQUENCY - Hz 100M 0
-60 -70 -80 -90 -100 -110 -120 -130 10k
-2
-4
-6 10k
100k
1M 10M FREQUENCY - Hz
100M
TPC 7. Off Isolation vs. Frequency
TPC 9. On Response vs. Frequency
-30 VDD = 5V, 3V -40 -50
CROSSTALK - dB
-60 -70 -80 -90 -100 -110 -120 -130 10k
100k
1M FREQUENCY - Hz
10M
100M 0
TPC 8. Crosstalk vs. Frequency
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ADG779 Test Circuits
IDS V1 S VS D
VS IS (OFF) A S D ID (OFF) A VD
ID (ON) S VS D A VD
RON = V1/I DS
Test Circuit 1. On Resistance
Test Circuit 2. Off Leakage
Test Circuit 3. On Leakage
0.1 F
VDD VIN VDD 50% 90% 50% 90%
S VS IN GND
D RL 300 CL 35pF
VOUT
VOUT
tON
tOFF
Test Circuit 4. Switching Times
0.1 F
VDD VIN D D2 RL2 300 GND CL2 35pF VOUT
VS1 VS2 VIN
S1 S2 IN
VDD
0V 50% 0V
50% 50%
50%
VOUT
tD
tD
Test Circuit 5. Break-Before-Make Time Delay, tD
VDD
VDD 0.1 F NETWORK ANALYZER S IN D VIN GND RL 50 VOUT 50
NETWORK ANALYZER VOUT RL 50
0.1 F
VDD 0.1 F
VDD S1 S2 D
VDD
VDD S
R 50
NETWORK ANALYZER
50
VS
IN D
50 VS VOUT
50 VS IN GND
VIN GND
RL 50
VOUT OFF ISOLATION = 20 LOG VS
CROSSTALK = 20 LOG
CHANNEL-TO-CHANNEL VOUT VS
INSERTION LOSS = 20 LOG
VOUT WITH SWITCH VOUT WITHOUT SWITCH
Test Circuit 6. Off Isolation
Test Circuit 7. Channel-to-Channel Crosstalk
Test Circuit 8. Bandwidth
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ADG779
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
6-Lead Plastic Surface Mount Package (SC70) (KS-6)
C02491-1.5-7/01(0)
8 0.007 (0.18) 0 0.004 (0.10) 0.012 (0.30) 0.004 (0.10) 0.087 (2.20) 0.071 (1.80)
0.053 (1.35) 0.045 (1.15) PIN 1
6 1
5 2
4 3
0.094 (2.40) 0.071 (1.80)
0.026 (0.65) BSC 0.051 (1.30) BSC 0.039 (1.00) 0.031 (0.80) 0.004 (0.10) 0.000 (0.00) 0.043 (1.10) 0.031 (0.80) 0.012 (0.30) SEATING 0.006 (0.15) PLANE
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PRINTED IN U.S.A.

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