ADG742_15 [ADI]
CMOS Low Voltage;
| 型号： | ADG742_15 |
| 厂家： | 
ADI |
| 描述： | CMOS Low Voltage |
| 文件： | 总12页 (文件大小：315K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CMOS Low Voltage
2 Ω SPST Switches in SC70 Packages
ADG741/ADG742
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
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
ADG741
D
S
6-lead and 5-lead SC70 packages
Fast switching times
IN
tON 18 ns
SWITCH SHOWN FOR
A LOGIC 1 INPUT
tOFF 12 ns
Typical power consumption (<0.01 µW)
TTL-/CMOS-compatible
Figure 1.
APPLICATIONS
ADG742
S
Battery-powered systems
Communication systems
Sample-and-hold systems
Audio signal routing
D
IN
Video switching
Mechanical reed relay replacement
SWITCH SHOWN FOR
A LOGIC 1 INPUT
Figure 2.
PRODUCT HIGHLIGHTS
GENERAL DESCRIPTION
1. 1.8 V to 5.5 V Single-Supply Operation.
The ADG741/ADG742 are monolithic CMOS SPST switches.
These switches are designed using an advanced submicron
process that provides low power dissipation, yet offers high
switching speed, low on resistance, and low leakage currents. In
addition, −3 dB bandwidths of greater than 200 MHz can be
achieved.
The ADG741/ADG742 offer high performance, including
low on resistance and fast switching times. They are fully
specified and guaranteed with 3 V and 5 V supply rails.
2. Very 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.
The ADG741/ADG742 can operate from a single 1.8 V to 5.5 V
supply, making them ideal for use in battery-powered instru-
ments and with Analog Devices’ new generation of DACs and
ADCs.
3. On Resistance Flatness RFLAT (ON) (1 Ω max).
4. −3 dB Bandwidth >200 MHz.
As shown in the Functional Block Diagrams, with a logic input
of 1 the switch of the ADG741 is closed, while that of the
ADG742 is open. Each switch conducts equally well in both
directions when on.
5. Low Power Dissipation.
CMOS construction ensures low power dissipation.
6. Fast tON/tOFF
.
7. Tiny 6-Lead and 5-Lead SC70 Packages.
The ADG741/ADG742 are available in 6-lead and 5-lead SC70
packages.
Rev. A
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
Fax: 781.461.3113
www.analog.com
© 2005 Analog Devices, Inc. All rights reserved.
ADG741/ADG742
TABLE OF CONTENTS
Specifications..................................................................................... 3
Applications Information.............................................................. 10
Supply Voltages........................................................................... 10
On Response vs. Frequency ...................................................... 10
Off Isolation ................................................................................ 10
Outline Dimensions....................................................................... 11
Ordering Guide .......................................................................... 11
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Terminology ...................................................................................... 8
Test Circuits....................................................................................... 9
REVISION HISTORY
3/05—Rev. 0 to Rev. A
Added 5-Lead Package.......................................................Universal
Change to Absolute Maximum Ratings......................................... 5
Inserted New Figure 4...................................................................... 6
Added Terminology Section ........................................................... 8
Replaced Figure 11, Figure 12, and Figure 13............................... 9
Updated Outline Dimensions....................................................... 12
Changes to Ordering Guide .......................................................... 12
10/00—Revision 0: Initial Version
Rev. A | Page 2 of 12
ADG741/ADG742
SPECIFICATIONS
VDD = 5 V 10%, GND = 0 V. All specifications −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
3
0.5
Ω typ
Ω max
Ω typ
Ω max
VS = 0 V to VDD, IS = −10 mA;
Figure 11
VS = 0 V to VDD, IS = −10 mA
4
On Resistance Flatness (RFLAT (ON)
)
1.0
LEAKAGE CURRENTS1
VDD = 5.5 V
Source OFF Leakage IS (OFF)
0.01
0.25
0.01
0.25
0.01
0.25
nA typ
nA max
nA typ
nA max
nA typ
nA max
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
Drain OFF Leakage ID (OFF)
Channel ON Leakage ID, IS (ON)
DIGITAL INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
2.4
0.8
V min
V max
IINL or IINH
0.005
µA typ
VIN = VINL or VINH
0.1
µA max
DYNAMIC CHARACTERISTICS1
tON
12
8
ns typ
ns max
ns typ
ns max
pC typ
dB typ
dB typ
MHz typ
pF typ
pF typ
pF typ
RL = 300 Ω, CL = 35 pF
VS = 3 V; Figure 14
RL = 300 Ω, CL = 35 pF
VS = 3 V; Figure 14
VS = 2 V, RS = 0 Ω, CL = 1 nF; Figure 15
RL = 50 Ω, CL = 5 pF, f = 10 MHz
RL = 50 Ω, CL= 5 pF, f = 1 MHz; Figure 16
RL = 50 Ω, CL = 5 pF; Figure 17
18
12
tOFF
Charge Injection
Off Isolation
5
−55
−75
200
17
17
38
Bandwidth −3 dB
CS (OFF)
CD (OFF)
CD, CS (ON)
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.
Rev. A | Page 3 of 12
ADG741/ADG742
VDD = 3 V 10%, GND = 0 V. All specifications −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
6
V
On Resistance (RON
)
3.5
5
1.5
Ω typ
Ω max
Ω typ
VS = 0 V to VDD, IS = −10 mA;
Figure 11
On Resistance Flatness (RFLAT (ON)
)
VS = 0 V to VDD, IS = −10 mA
VDD = 3.3 V
LEAKAGE CURRENTS1
Source OFF Leakage IS (OFF)
0.01
0.25
0.01
0.25
0.01
0.25
nA typ
nA max
nA typ
nA max
nA typ
nA max
VS = 3 V/1 V, VD = 1 V/3 V;
Figure 12
VS = 3 V/1 V, VD = 1 V/3 V;
Figure 12
VS = VD = 1 V, or 3 V;
Figure 13
0.35
0.35
0.35
Drain OFF Leakage ID (OFF)
Channel ON Leakage ID, IS (ON)
DIGITAL INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
2.0
0.4
V min
V max
IINL or IINH
0.005
µA typ
VIN = VINL or VINH
0.1
µA max
DYNAMIC CHARACTERISTICS1
tON
14
8
ns typ
ns max
ns typ
ns max
pC typ
dB typ
dB typ
MHz typ
pF typ
pF typ
pF typ
RL = 300 Ω, CL = 35 pF
VS = 2 V, Figure 14
RL = 300 Ω, CL = 35 pF
VS = 2 V, Figure 14
VS = 1.5 V, RS = 0 Ω, CL = 1 nF; Figure 15
RL = 50 Ω, CL = 5 pF, f = 10 MHz
RL = 50 Ω, CL = 5 pF, f = 1 MHz; Figure 16
RL = 50 Ω, CL = 5 pF; Figure 17
20
13
tOFF
Charge Injection
Off Isolation
4
−55
−75
200
17
17
38
Bandwidth −3 dB
CS (OFF)
CD (OFF)
CD, CS (ON)
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.
Rev. A | Page 4 of 12
ADG741/ADG742
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
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.
Parameters
Ratings
VDD to GND
Analog, Digital Inputs1
−0.3 V to +7 V
−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 (Pulsed at 1ms,
10% Duty Cycle Max)
100 mA
Operating Temperature Range
Industrial (B Version)
Storage Temperature Range
Junction Temperature
SC70 Package
θJA Thermal Impedance
θJC Thermal Impedance
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
−40°C to +85°C
−65°C to +150°C
150°C
Table 4. Truth Table
ADG741 In
ADG742 In
Switch Condition
494.8°C/W
120°C/W
0
1
1
0
OFF
ON
215°C
220°C
1.5 kV
ESD
1 Overvoltages at IN, S, or D will be 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 degrada-
tion or loss of functionality.
Rev. A | Page 5 of 12
ADG741/ADG742
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
D
S
1
2
3
6
5
4
V
DD
D
S
1
2
3
5
4
V
DD
ADG741/
ADG742
ADG741/
ADG742
TOP VIEW
NC
IN
TOP VIEW
GND
(Not to Scale)
IN
(Not to Scale)
GND
NC = NO CONNECT
Figure 4. 5-Lead Pin Configuration
Figure 3. 6-Lead Pin Configuration
Table 5. Pin Function Descriptions
Pin No. (6-Lead)
Pin No. (5-Lead)
Mnemonic
Description
1
2
3
4
5
6
1
2
3
4
-
D
S
GND
IN
NC
VDD
Drain Terminal. May be an input or output.
Source Terminal. May be an input or output.
Ground (0 V) Reference.
Logic Control Input.
No Connect.
5
Most Positive Power Supply Potential.
Rev. A | Page 6 of 12
ADG741/ADG742
TYPICAL PERFORMANCE CHARACTERISTICS
10m
1m
3.5
V
= 2.7V
V
= 5V
T
= 25°C
DD
DD
A
3.0
2.5
2.0
1.5
1.0
0.5
0
100
10
1
µ
µ
µ
V
= 3.0V
DD
V
= 4.5V
DD
V
= 5.0V
DD
100n
10n
1n
10
100
1k
10k
100k
1M
10M
0
0.5
1.0
1.5
2.0 2.5
3.0
3.5
4.0
4.5
5.0
FREQUENCY (Hz)
V
OR V (DRAIN OR SOURCE VOLTAGE (V))
D
S
Figure 8. Supply Current vs. Input Switching Frequency
Figure 5. On Resistance as a Function of VD (VS) Single Supplies
–10
–20
–30
–40
–50
–60
3.5
V
= 3V
DD
V
= 5V, 3V
DD
3.0
2.5
2.0
1.5
1.0
0.5
0
+85°C
+25°C
–40°C
–70
–80
–90
–100
–110
10k
100k
1M
10M
100M
0
0.5
1.0
1.5
2.0
2.5
3.0
FREQUENCY (Hz)
V
OR V (DRAIN OR SOURCE VOLTAGE (V))
D
S
Figure 9. Off Isolation vs. Frequency
Figure 6. On Resistance as a Function of VD (VS)
for Different Temperatures VDD = 3 V
3.5
3.0
2.5
2.0
1.5
0
V
= 5V
DD
V
= 3V
DD
–2
–4
+85°C
+25°C
–40°C
1.0
0.5
0
–6
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
10k
100k
1M
10M
100M
V
OR V (DRAIN OR SOURCE VOLTAGE (V))
S
FREQUENCY (Hz)
D
Figure 7. On Resistance as a Function of VD (VS)
for Different Temperatures VDD = 5 V
Figure 10. On Response vs. Frequency
Rev. A | Page 7 of 12
ADG741/ADG742
TERMINOLOGY
RON
CD, CS (ON)
Ohmic resistance between D and S.
On switch capacitance. Measured with reference to ground.
RFLAT (ON)
tON
Flatness is defined as the difference between the maximum and
minimum value of on resistance as measured.
Delay time between the 50% and the 90% points of the digital
input and switch on condition. See Figure 14.
IS (OFF)
tOFF
Source leakage current with the switch off.
Delay time between the 50% and the 90% points of the digital
input and switch off condition.
ID (OFF)
Drain leakage current with the switch off.
Off Isolation
A measure of unwanted signal coupling through an off switch.
ID, IS (ON)
Channel leakage current with the switch on.
Charge Injection
A measure of the glitch impulse transferred from the digital
input to the analog output during on-off switching.
VD (VS)
Analog voltage on Terminal D and Terminal S.
Bandwidth
CS (OFF)
The frequency at which the output is attenuated by −3 dB.
Off switch source capacitance. Measured with reference to
ground.
On Response
The frequency response of the on switch.
CD (OFF)
Off switch drain capacitance. Measured with reference to
ground.
On Loss
The voltage drop across the on switch as how many dBs the
signal is away from 0 dB at very low frequencies. See Figure 10.
Rev. A | Page 8 of 12
ADG741/ADG742
TEST CIRCUITS
I
(ON)
A
I
(OFF)
A
I
(OFF)
A
V
D
S
D
S
D
S
D
NC
V
D
S
D
NC = NO CONNECT
V
V
D
S
I
DS
V
S
Figure 12. Off Leakage
Figure 13. On Leakage
Figure 11. On Resistance
V
DD
0.1
S
µ F
V
ADG741
ADG742
50%
50%
50%
50%
IN
V
DD
V
L
OUT
D
V
IN
R
C
L
V
S
35pF
300Ω
IN
90%
90%
V
OUT
GND
tOFF
tON
Figure 14. Switching Times
V
V
DD
DD
V
V
IN
IN
ADG741
ADG742
ON
OFF
V
R
OUT
S
S
D
V
C
L
S
1nF
IN
V
OUT
∆V
OUT
GND
Q
= C × ∆V
L OUT
INJ
Figure 15. Charge Injection
V
V
V
DD
DD
0.1µF
0.1µF
V
DD
DD
V
V
OUT
OUT
S
D
S
D
R
50Ω
R
50Ω
L
L
IN
IN
V
V
IN
IN
V
V
S
S
GND
GND
Figure 16. Off Isolation
Figure 17. Bandwidth
Rev. A | Page 9 of 12
ADG741/ADG742
APPLICATIONS INFORMATION
The ADG741/ADG742 belong to Analog Devices’ family of
CMOS switches. This series of general-purpose switches offers
improved switching times, lower on resistance, higher
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).
bandwidth, low power consumption, and low leakage currents.
SUPPLY VOLTAGES
Functionality of the ADG741/ADG742 extends from 1.8 V to
5.5 V single supply, which makes them ideal for battery-
powered instruments where important design parameters are
power, efficiency, and performance.
The dominant effect of the output capacitance, CD, causes the
pole breakpoint frequency to occur first. To maximize
bandwidth, a switch must have a low input and output
capacitance and low on resistance. The on response vs.
frequency is shown in Figure 10.
It is important to note that the supply voltage affects the input
signal range, the on resistance, and the switching times of the
part. By looking at the typical performance characteristics and
the specifications, the effects of the power supplies can be
clearly seen.
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.
For VDD = 1.8 V operation, RON is typically 40 Ω over the
temperature range.
ON RESPONSE VS. FREQUENCY
C
Figure 18 illustrates the parasitic components that affect the
ac performance of CMOS switches (the switch is shown
surrounded by a box). Additional external capacitances will
further degrade some performance. These capacitances affect
feedthrough, crosstalk, and system bandwidth.
DS
S
D
V
OUT
C
C
R
D
LOAD
LOAD
V
IN
Figure 19. Off Isolation Affected by External
Load Resistance and Capacitance
C
DS
S
D
V
OUT
The larger the value of CDS, the larger the value of feedthrough
that will be produced. The typical performance characteristic
graph of 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 affect off isolation also, as
they contribute to the coefficients of the poles and zeros in the
transfer function of the switch when open.
R
ON
C
C
R
D
LOAD
LOAD
V
IN
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), as shown below.
⎡
⎤
s
(
RON CDS
)
+ 1
)
A
(
)
s = RT
⎢
⎣
⎥
⎦
s
(
RON CT RT + 1
where:
CT = CLOAD + CD + CDS
RT = RLOAD RLOAD + RON
⎡
s
RLOAD CDS
)
+ 1
⎤
A
(
)
s =
⎢
⎣
⎥
⎦
s
(
RLOAD ) (CT
)
(
)
Rev. A | Page 10 of 12
ADG741/ADG742
OUTLINE DIMENSIONS
2.20
2.00
1.80
2.20
2.00
1.80
2.40
2.10
1.80
6
1
5
2
4
3
1.35
1.25
1.15
1.35
1.25
1.15
2.40
2.10
1.80
5
1
4
3
2
PIN 1
1.30 BSC
0.65 BSC
PIN 1
1.00
0.90
0.70
0.65 BSC
1.00
0.90
0.70
0.40
0.10
0.40
0.10
1.10
0.80
1.10
0.80
0.30
0.10
0.30
0.10
0.30
0.15
0.22
0.08
0.30
0.15
0.22
0.08
0.10 M
AX
0.10 MAX
SEATING
PLANE
SEATING
PLANE
0.10 COPLANARITY
0.10 COPLANARITY
COMPLIANT TO JEDEC STANDARDS MO-203AA
COMPLIANT TO JEDEC STANDARDS MO-203-AB
Figure 21. 5-Lead Thin Shrink Small Outline Transistor Package [SC70]
Figure 20. 6-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-5)
(KS-6)
Dimensions shown in millimeters
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADG741BKS-R2
Temperature Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
Brand1
SFB
SFB
SFB
S00
S00
S00
SGB
SGB
SGB
S01
S01
S01
S01
S01
Package Description
6-lead SC70
6-lead SC70
6-lead SC70
6-lead SC70
5-lead SC70
5-lead SC70
6-lead SC70
6-lead SC70
6-lead SC70
6-lead SC70
6-lead SC70
6-lead SC70
5-lead SC70
5-lead SC70
Package Option
KS-6
KS-6
KS-6
KS-6
KS-5
KS-5
KS-6
KS-6
KS-6
KS-6
KS-6
KS-6
KS-5
KS-5
ADG741BKS-REEL
ADG741BKS-REEL7
ADG741BKSZ-REEL2
ADG741BKSZ5-REEL2
ADG741BKSZ5-REEL72
ADG742BKS-R2
ADG742BKS-REEL
ADG742BKS-REEL7
ADG742BKSZ-R22
ADG742BKSZ-REEL2
ADG742BKSZ-REEL72
ADG742BKSZ5-REEL2
ADG742BKSZ5-REEL72
1 Brand on these packages is limited to three characters due to space constraints.
2 Z = Pb-free part.
Rev. A | Page 11 of 12
ADG741/ADG742
NOTES
©2005 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C02076–0–3/05(A)
Rev. A | Page 12 of 12
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SI9137DB
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