ANALOG DEVICES ADG841, ADG842 Service Manual
0.28 Ω CMOS 1.65 V to 3.6 V
www.BDTIC.com/ADI
FEATURES
Ultralow on resistance
0.28 Ω typical
0.48 Ω max at 125°C
Excellent audio performance, ultralow distortion
0.025 Ω typical
0.052 Ω max R
1.65 V to 3.6 V single supply
High current carrying capability
300 mA continuous current
500 mA peak current
Automotive temperature range: –40°C to +125°C
Rail-to-rail operation
Typical power consumption (<0.01 µW)
APPLICATIONS
Handsets
PDAs
MP3 players
Power routing
Battery-powered systems
Communication systems
Modems
PCMCIA cards
GENERAL DESCRIPTION
The ADG841 and ADG842 are low voltage CMOS devices
containing a single-pole, single-throw (SPST) switch. The
ADG841 is closed for a Logic 1 input and the ADG842 is open
for a Logic 1 input. The devices offer ultralow on resistance of
less than 0.48 Ω over the full temperature range. The ADG841/
ADG842 are fully specified for 3.3 V, 2.5 V, and 1.8 V supply
operation.
flatness
ON
Single SPST Switches in SC70
ADG841/ADG842
FUNCTIONAL BLOCK DIAGRAM
ADG841
S
IN
D
SWITCHES SHOWN
FOR A LOGIC 1 INPUT
Figure 1.
PRODUCT HIGHLIGHTS
1. <0.48 Ω over full temperature range of –40°C to +125°C.
2. Compatible with 1.8 V CMOS logic.
3. High current handling capability (300 mA continuous
current at 3.3 V).
4. Low THD + N (0.02% typ).
5. Tiny SC70 package.
Table 1. ADG841/ADG842 Truth Table
Logic (IN) ADG841 ADG842
0 Off On
1 On Off
S
IN
ADG842
D
05424-001
Each switch conducts equally well in both directions when on,
and has an input signal range that extends to the supplies. The
ADG841/ADG842 exhibit break-before-make switching action.
The ADG841/ADG842 are available in a 6-lead SC70 package.
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 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: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.
ADG841/ADG842
www.BDTIC.com/ADI
TABLE OF CONTENTS
Specifications—2.7 V to 3.6 V......................................................... 3
Typical Performance Characteristics..............................................8
Specifications—2.5 V ± 0.2 V.......................................................... 4
Specifications—1.65 V to 1.95 ........................................................ 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
REVISION HISTORY
4/05—Revision 0: Initial Version
Terminology.....................................................................................11
Test Circuits......................................................................................12
Outline Dimensions........................................................................13
Ordering Guide ...........................................................................13
Rev. 0 | Page 2 of 16
ADG841/ADG842
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SPECIFICATIONS—2.7 V TO 3.6 V1
VDD = 2.7 V to 3.6 V, GND = 0 V, unless otherwise noted.
Table 2.
−40°C −40°C
Parameter +25°C to +85°C to +125°C Unit Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range 0 V to VDD V VDD = 2.7 V
On Resistance (RON) 0.28 Ω typ VDD = 2.7 V, VS = 0 V to VDD, IDS = −100 mA
0.37 0.43 0.48 Ω max Figure 18
On Resistance Flatness (R
0.034 0.044 0.052 Ω max
LEAKAGE CURRENTS VDD = 3.6 V
Source Off Leakage IS (OFF) ±0.2 nA typ VS = 0.6 V/3.3 V, VD = 3.3 V/0.6 V; Figure 19
Channel On Leakage ID, IS (ON) ±0.2 nA typ VS = VD = 0.6 V or 3.3 V; Figure 20
DIGITAL INPUTS
Input High Voltage, V
Input Low Voltage, V
Input Current, I
±0.1 µA max
Digital Input Capacitance, CIN 3.2 pF typ
DYNAMIC CHARACTERISTICS2
tON 10.5 ns typ RL = 50 Ω, CL = 35 pF
14 15.5 16.5 ns max VS = 1.5 V; Figure 21
t
6.5 ns typ RL = 50 Ω, CL = 35 pF
OFF
7.8 8 8.2 ns max VS = 1.5 V; Figure 21
Charge Injection 200 pC typ VS = 1.5 V, RS = 0 Ω, CL = 1 nF; Figure 22
Off Isolation −54 dB typ RL = 50 Ω, CL = 5 pF, f = 100 kHz; Figure 23
Total Harmonic Distortion (THD + N) 0.012 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 3 V p-p
Insertion Loss −0.02 dB typ RL = 50 Ω, CL = 5 pF; Figure 24
−3 dB Bandwidth 21 MHz typ RL = 50 Ω, CL = 5 pF; Figure 24
CS (OFF) 160 pF typ
CD (OFF) 160 pF typ
CD, CS (ON) 238 pF typ
POWER REQUIREMENTS VDD = 3.6 V
IDD 0.003 µA typ Digital inputs = 0 V or 3.6 V
1 4 µA max
1
Temperature range is −40°C to +125°C
2
Guaranteed by design; not subject to production test.
INH
0.8 V max
INL
or I
0.005 µA typ VIN = V
INL
INH
) 0.025 Ω typ VDD = 2.7 V, VS = 0 V to VDD, IDS = −100 mA
FLAT (ON)
2 V min
or V
INH
INL
Rev. 0 | Page 3 of 16
ADG841/ADG842
www.BDTIC.com/ADI
SPECIFICATIONS—2.5 V ± 0.2 V1
VDD = 2.5 V ± 0.2 V, GND = 0 V, unless otherwise noted.
Table 3.
−40°C −40°C
Parameter +25°C to +85°C to +125°C Unit Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range 0 V to VDD V
On Resistance (RON) 0.3 Ω typ VDD = 2.3 V, VS = 0 V to VDD, IDS = −100 mA
0.35 0.4 0.45 Ω max Figure 18
On Resistance Flatness (R
0.04 0.05 0.05 Ω max
LEAKAGE CURRENTS VDD = 2.7 V
Source Off Leakage IS (OFF) ±0.2 nA typ VS = 0.6 V/2.4 V, VD = 2.4 V/0.6 V; Figure 19
Channel On Leakage ID, IS (ON) ±0.2 nA typ VS = VD = 0.6 V or 2.4 V; Figure 20
DIGITAL INPUTS
Input High Voltage, V
Input Low Voltage, V
Input Current, I
±0.1 µA max
Digital Input Capacitance, CIN 3.2 pF typ
DYNAMIC CHARACTERISTICS2
tON 13 ns typ RL = 50 Ω, CL = 35 pF
16.5 18 19 ns max VS = 1.5 V; Figure 21
t
7 ns typ RL = 50 Ω, CL = 35 pF
OFF
8.2 8.4 8.6 ns max VS = 1.5 V; Figure 21
Charge Injection 150 pC typ VS = 1.25 V, RS = 0 Ω, CL = 1 nF; Figure 22
Off Isolation −54 dB typ RL = 50 Ω, CL = 5 pF, f = 100 kHz; Figure 23
Total Harmonic Distortion (THD + N) 0.022 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 1.5 V p-p
Insertion Loss −0.02 dB typ RL = 50 Ω, CL = 5 pF; Figure 24
–3 dB Bandwidth 21 MHz typ RL = 50 Ω, CL = 5 pF; Figure 24
CS (OFF) 170 pF typ
CD (OFF) 170 pF typ
CD, CS (ON) 238 pF typ
POWER REQUIREMENTS VDD = 2.7 V
IDD 0.003 µA typ Digital inputs = 0 V or 2.7 V
1 4 µA max
1
Temperature range is −40°C to +125°C.
2
Guaranteed by design; not subject to production test.
INH
0.7 V max
INL
or I
INL
0.005 µA typ VIN = V
INH
) 0.025 Ω typ VDD = 2.3 V, VS = 0 V to VDD, IDS = −100 mA
FLAT (ON)
1.7 V min
or V
INH
INL
Rev. 0 | Page 4 of 16
ADG841/ADG842
www.BDTIC.com/ADI
SPECIFICATIONS—1.65 V TO 1.951
VDD = 1.65 V to1.95 V, GND = 0 V, unless otherwise noted.
Table 4.
−40°C −40°C
Parameter +25°C to +85°C to +125°C Unit Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range 0 V to VDD V
On Resistance (RON) 0.37 Ω typ VDD = 1.8 V, VS = 0 V to VDD, IDS = −100 mA
0.4 0.84 0.84 Ω max Figure 18
0.6 1.8 1.8 Ω max VDD = 1.65 V, VS = 0 V to VDD, IDS = −100 mA
On Resistance Flatness (R
LEAKAGE CURRENTS VDD = 1.95 V
Source Off Leakage IS (OFF) ±0.2 nA typ VS = 0.6 V/1.65 V, VD = 1.65 V/0.6 V; Figure 19
Channel On Leakage ID, IS (ON) ±0.2 nA typ VS = VD = 0.6 V or 1.65 V; Figure 20
DIGITAL INPUTS
Input High Voltage, V
Input Low Voltage, V
Input Current, I
±0.1 µA max
Digital Input Capacitance, CIN 4 pF typ
DYNAMIC CHARACTERISTICS2
tON 19 ns typ RL = 50 Ω, CL = 35 pF
26 28 30 ns max VS = 1.5 V; Figure 21
t
8 ns typ RL = 50 Ω, CL = 35 pF
OFF
9.5 9.8 10 ns max VS = 1.5 V; Figure 21
Charge Injection 100 pC typ VS = 1 V, RS = 0 V, CL = 1 nF; Figure 22
Off Isolation −54 dB typ RL = 50 Ω, CL = 5 pF, f = 100 kHz; Figure 23
Total Harmonic Distortion (THD + N) 0.14 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 1.2 V p-p
Insertion Loss −0.02 dB typ RL = 50 Ω, CL = 5 pF; Figure 24
–3 dB Bandwidth 21 MHz typ RL = 50 Ω, CL = 5 pF; Figure 24
CS (OFF) 178 pF typ
CD (OFF) 178 pF typ
CD, CS (ON) 238 pF typ
POWER REQUIREMENTS VDD = 1.95 V
IDD 0.003 µA typ Digital inputs = 0 V or 1.95 V
1 4 µA max
1
Temperature range −40°C to +125°C.
2
Guaranteed by design; not subject to production test.
INH
0.35 VDD V max
INL
or I
0.005 µA typ VIN = V
INL
INH
) 0.17 Ω typ VDD = 1.65 V, VS = 0 V to VDD, IDS = −100 mA
FLAT (ON)
0.65 VDD V min
or V
INH
INL
Rev. 0 | Page 5 of 16
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