Low Voltage, 400 MHz, Quad 2:1
Mux with 3 ns Switching Time
ADG774A
FEATURES
Bandwidth: >400 MHz
Low insertion loss and on resistance: 2.2 Ω typical
On resistance flatness: 0.3 Ω typical
Single 3 V/5 V supply operation
Very low distortion: <0.3%
Low quiescent supply current: 1 nA typical
Fast switching times
t
ON
= 6 ns
t
OFF
= 3 ns
TTL-/CMOS-compatible
Pb-free packages
16-lead QSSOP
16-lead 3 mm × 3 mm body LFCSP
FUNCTIONAL BLOCK DIAGRAM
ADG774A
S1A
S1B
S2A
S2B
S3A
S3B
S4A
S4B
1 OF 2
DECODER
EN
IN
02373-001
D1
D2
D3
D4
Figure 1.
GENERAL DESCRIPTION
The ADG774A is a monolithic CMOS device comprising four
2:1 multiplexer/demultiplexers with high impedance outputs.
The CMOS process provides low power dissipation yet offers
high switching speed and low on resistance. The on resistance
variation is typically less than 0.5 Ω over the input signal range.
The bandwidth of the ADG774A is typically 400 MHz and this,
coupled with low distortion (typically 0.3%), makes the part
suitable for switching of high speed data signals.
The on resistance profile is very flat over the full analog input
range ensuring excellent linearity and low distortion. CMOS
construction ensures ultralow power dissipation.
The ADG774A operates from a single 3.3 V/5 V supply and is
TTL logic-compatible. The control logic for each switch is
shown in the truth table (see Table 5).
These switches conduct equally well in both directions when
on. In the off condition, signal levels up to the supplies are
blocked. The ADG774A switches exhibit break-before-make
switching action.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
6.
7.
Wide bandwidth data rates of >400 MHz.
Ultralow power dissipation.
Low leakage over temperature.
Break-before-make switching prevents channel shorting
when the switches are configured as a multiplexer.
Crosstalk is typically −70 dB @ 10 MHz.
Off isolation is typically −65 dB @ 10 MHz.
Available in compact 3 mm × 3 mm LFCSP.
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: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
ADG774A
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Single Supply ................................................................................. 3
Absolute Maximum Ratings............................................................ 5
ESD Caution...................................................................................5
Pin Configurations and Function Descriptions ............................6
Typical Performance Characteristics ..............................................7
Test Circuits........................................................................................9
Terminology .................................................................................... 11
Application Circuits ....................................................................... 12
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 13
REVISION HISTORY
8/06—Rev. A to Rev. B
Updated Format..................................................................Universal
Added LFCSP Model..........................................................Universal
Added Lead-Free Models ..................................................Universal
Changes to Table 3.............................................................................5
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 13
4/03—Rev. 0 to Rev. A
Changes to TPCs 9–11......................................................................5
Updated Outline Dimensions..........................................................8
7/01—Revision 0: Initial Version
Rev. B | Page 2 of 16
ADG774A
SPECIFICATIONS
SINGLE SUPPLY
V
DD
= 5 V ± 10%, GND = 0 V, all specifications T
MIN
to T
MAX
, unless otherwise noted.
1
Table 1.
Parameter
ANALOG SWITCH
Analog Signal Range
On Resistance, R
ON
On Resistance Match Between Channels, ∆R
ON
On Resistance Flatness, R
FLAT(ON)
LEAKAGE CURRENTS
Source Off Leakage, I
S
(OFF)
Drain Off Leakage, I
D
(OFF)
Channel On Leakage, I
D
, I
S
(ON)
DIGITAL INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current
I
INL
or I
INH
Digital Input Capacitance, C
IN
DYNAMIC CHARACTERISTICS
2
t
ON
, t
ON
(EN)
t
OFF
, t
OFF
(EN)
Break-Before-Make Time Delay, t
D
Off Isolation
Channel-to-Channel Crosstalk
Bandwidth −3 dB
Distortion
Charge Injection
C
S
(OFF)
C
D
(OFF)
C
D
, C
S
(ON)
POWER REQUIREMENTS
I
DD
0.001
1
2
B Version
25°C
T
MIN
to T
MAX
0 to 2.5
2.2
3.5
0.15
0.3
0.6
±0.001
±0.1
±0.001
±0.1
±0.001
±0.1
4
0.5
Unit
V
Ω typ
Ω max
Ω typ
Ω max
Ω typ
Ω max
nA typ
nA max
nA typ
nA max
nA typ
nA max
V min
V max
μA typ
μA max
pF typ
ns typ
ns max
ns typ
ns max
ns typ
ns min
dB typ
dB typ
MHz typ
% typ
pC typ
pF typ
pF typ
pF typ
Test Conditions/Comments
V
D
= 0 V to 1 V, I
S
= −10 mA
V
D
= 0 V to 1 V, I
S
= −10 mA
V
D
= 0 V to 1 V, I
S
= −10 mA
V
D
= 3 V/1 V, V
S
= 1 V/3 V, see Figure 17
V
D
= 3 V/1 V, V
S
= 1 V/3 V, see Figure 17
V
D
= V
S
= 3 V/1 V, see Figure 18
±0.25
±0.25
±0.25
2.4
0.8
0.001
±0.1
3
6
12
3
6
3
1
−65
−70
400
0.3
6
5
7.5
12
V
IN
= V
INL
or V
INH
C
L
= 35 pF, R
L
= 50 Ω, V
S
= 2 V, see Figure 22
C
L
= 35 pF, R
L
= 50 Ω, V
S
= 2 V, see Figure 22
C
L
= 35 pF, R
L
= 50 Ω, V
S1
= V
S2
= 2 V, see Figure 23
f = 10 MHz, R
L
= 50 Ω, see Figure 20
f = 10 MHz, R
L
= 50 Ω, see Figure 21
R
L
= 50 Ω, see Figure 19
R
L
= 100 Ω
C
L
= 1 nF, see Figure 24, V
S
= 0 V
V
DD
= 5.5 V
Digital inputs = 0 V or V
DD
1
μA max
μA typ
Temperature range for B version is −40°C to +85°C.
Guaranteed by design, not subject to production test.
Rev. B | Page 3 of 16
ADG774A
V
DD
= 3 V ± 10%, GND = 0 V, all specifications T
MIN
to T
MAX
, unless otherwise noted.
1
Table 2.
Parameter
ANALOG SWITCH
Analog Signal Range
On Resistance, R
ON
On Resistance Match Between Channels,
∆R
ON
On Resistance Flatness, R
FLAT(ON)
LEAKAGE CURRENTS
Source Off Leakage, I
S
(OFF)
Drain Off Leakage, I
D
(OFF)
Channel On Leakage, I
D
, I
S
(ON)
DIGITAL INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current
I
INL
or I
INH
Digital Input Capacitance, C
IN
DYNAMIC CHARACTERISTICS
2
t
ON
, t
ON
(EN)
t
OFF
, t
OFF
(EN)
Break-Before-Make Time Delay, t
D
Off Isolation
Channel-to-Channel Crosstalk
Bandwidth −3 dB
Distortion
Charge Injection
C
S
(OFF)
C
D
(OFF)
C
D
, C
S
(ON)
POWER REQUIREMENTS
I
DD
0.001
1
2
B Version
25°C
T
MIN
to T
MAX
0 to 1.5
4
6
0.15
1.5
3
±0.001
±0.1
±0.001
±0.1
±0.001
±0.1
7
0.5
Unit
V
Ω typ
Ω max
Ω typ
Ω max
Ω typ
Ω max
nA typ
nA max
nA typ
nA max
nA typ
nA max
V min
V max
μA typ
μA max
pF typ
ns typ
ns max
ns typ
ns max
ns typ
ns min
dB typ
dB typ
MHz typ
% typ
pC typ
pF typ
pF typ
pF typ
Test Conditions/Comments
V
D
= 0 V to 1 V; I
S
= −10 mA
V
D
= 0 V to 1 V, I
S
= −10 mA
V
D
= 0 V to 1 V, I
S
= −10 mA
V
D
= 2 V/1 V, V
S
= 1 V/2 V, see Figure 17
V
D
= 2 V/1 V, V
S
= 1 V/2 V, see Figure 17
V
D
= V
S
= 2 V/1 V, see Figure 18
±0.25
±0.25
±0.25
2.0
0.4
0.001
±0.1
3
7
14
4
8
3
1
−65
−70
400
1.5
4
5
7.5
12
V
IN
= V
INL
or V
INH
C
L
= 35 pF, R
L
= 50 Ω, V
S
= 1.5 V, see Figure 22
C
L
= 35 pF, R
L
= 50 Ω, V
S
= 1.5 V, see Figure 22
C
L
= 35 pF, R
L
= 50 Ω, V
S1
= V
S2
= 1.5 V, see Figure 23
f = 10 MHz, R
L
= 50 Ω
f = 10 MHz, R
L
= 50 Ω, see Figure 21
R
L
= 50 Ω, see Figure 19
R
L
= 100 Ω
C
L
= 1 nF, see Figure 24, V
S
= 0 V
V
DD
= 3.3 V
Digital inputs = 0 V or V
DD
1
μA max
μA typ
Temperature range for B version is −40°C to +85°C.
Guaranteed by design, not subject to production test.
Rev. B | Page 4 of 16
ADG774A
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameters
V
DD
to GND
Analog, Digital Inputs
1
Continuous Current, S or D
Peak Current, S or D
Operating Temperature Range
Industrial (B Version)
Storage Temperature Range
Junction Temperature
Thermal Impedance, θ
JA
16-Lead QSSOP
16-Lead LFCSP(3 mm × 3 mm)
Lead Temperature Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
Reflow Soldering (Pb-free)
Peak Temperature
Time at Peak Temperature
1
Rating
−0.3 V to +6 V
−0.3 V to V
DD
+ 0.3 V or 30 mA,
whichever occurs first
100 mA
300 mA (pulsed at 1 ms,
10% duty cycle max)
−40°C to +85°C
−65°C to +150°C
150°C
105.44°C/W
2
48.7°C/W
2
215°C
220°C
260°C (+0°C/–5°C)
10 sec to 40 sec
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.
ESD CAUTION
Overvoltages at IN, S, or D are clamped by internal diodes. Current should be
limited to the maximum ratings given.
2
Measured with the device soldered on a four-layer board.
Rev. B | Page 5 of 16
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