ADG794 [ADI]
Low Voltage, 300 MHz Quad 2:1 Mux Analog HDTV Audio/Video Switch; 低电压， 300 MHz的四通道2： 1多路复用模拟高清电视音频/视频开关
| 型号： | ADG794 |
| 厂家： | 
ADI |
| 描述： | Low Voltage, 300 MHz Quad 2:1 Mux Analog HDTV Audio/Video Switch |
| 文件： | 总12页 (文件大小：426K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Low Voltage, 300 MHz Quad 2:1 Mux Analog
HDTV Audio/Video Switch
ADG794
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Bandwidth: 300 MHz
ADG794
Low insertion loss and on resistance: 5 Ω typical
On resistance flatness: 0.68 Ω typical
Single 3 V/5 V supply operation
Low quiescent supply current: 1 nA typical
Fast switching times:
S1A
D1
S1B
S2A
D2
S2B
S3A
D3
tON, 7 ns
S3B
S4A
tOFF, 5 ns
D4
S4B
TTL/CMOS compatible
1 OF 2
DECODER
APPLICATIONS
RGB switches
HDTV
IN
EN
DVD-R
Figure 1.
Audio/video switches
GENERAL DESCRIPTION
The ADG794 is a monolithic CMOS device comprising four
2:1 multiplexer/demultiplexers with high impedance outputs.
The CMOS process provides low power dissipation yet gives
high switching speed and low on resistance. The on resistance
variation is typically less than 1.2 Ω over the input signal range.
These switches conduct equally well in both directions when on.
In the off condition, signal levels up to the supplies are blocked.
The ADG794 switches exhibit break-before-make switching
action.
The ADG794 is available in a 16-pin QSOP package.
The bandwidth of the ADG794 is typically 300 MHz and this,
coupled with low distortion (typically 0.68%), makes the part
suitable for switching analog audio/video signals.
PRODUCT HIGHLIGHTS
1. Wide bandwidth: 300 MHz.
2. Ultralow power dissipation.
The ADG794 operates from a single 3.3 V/5 V supply and is
TTL logic compatible. The switches are controlled by the logic
3. Crosstalk is typically −70 dB at 10 MHz.
4. Off isolation is typically −65 dB at 10 MHz.
EN
EN
inputs IN and
as shown in Table 4. The
pin allows the
user to disable all switches.
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 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: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
ADG794
TABLE OF CONTENTS
Specifications..................................................................................... 3
Typical Performance Characteristics ..............................................8
Typical Application .......................................................................8
Test Circuits ........................................................................................9
Outline Dimensions....................................................................... 11
Ordering Guide .......................................................................... 11
Single Supply ................................................................................. 3
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Terminology ...................................................................................... 7
REVISION HISTORY
10/04—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
ADG794
SPECIFICATIONS
SINGLE SUPPLY
VDD = 5 V 10%, GND = 0 V. All specifications TMIN to TMAX, unless otherwise noted.
Table 1.
B Version1
Parameter
25°C
TMIN to TMAX
Unit
Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range
0 to 2.5
8
V
On Resistance (RON
)
5
7
0.4
Ω typ
Ω max
Ω typ
Ω max
Ω typ
Ω max
VD = 0 V to 1 V; IS = −10 mA; Figure 6
VD = 0 V to 1 V; IS = −10 mA
On Resistance Match between Channels (∆RON
)
1.2
On Resistance Flatness (RFLAT(ON)
)
0.7
VD = 0 V to 1 V; IS = −10 mA
1.35
LEAKAGE CURRENTS
Source Off Leakage, IS (Off)
Drain Off Leakage, ID (Off)
Channel On Leakage, ID, IS (On)
DIGITAL INPUTS
0.001
0.001
0.001
nA typ
nA typ
nA typ
VS = 3 V/1 V; VD = 1 V/3 V; Figure 7
VS = 3 V/1 V; VD = 1 V/3 V; Figure 7
VD = VS = 3 V/1 V; Figure 8
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
2.4
0.8
V min
V max
IINL or IINH
0.001
µA typ
µA max
pF typ
VIN = VINL or VINH
0.1
3
Digital Input Capacitance, CIN
DYNAMIC CHARACTERISTICS2
EN
)
7
5
3
ns typ
ns max
ns typ
ns max
ns typ
ns min
dB typ
dB typ
MHz typ
% typ
CL = 35 pF; RL = 50 Ω
VS = 2 V; Figure 9
CL = 35 pF; RL = 50 Ω
VS = 2 V; Figure 9
CL = 35 pF; RL = 50 Ω
VS1 = VS2 = 2 V; Figure 10
f = 10 MHz; RL = 50 Ω; Figure 12
f = 10 MHz; RL = 50 Ω; Figure 13
RL = 50 Ω; Figure 11
tON, tON
(
14
8
EN
( )
tOFF, tOFF
Break-Before-Make Time Delay, tD
1
Off Isolation
Channel-to-Channel Crosstalk
Bandwidth −3 dB
Distortion
Charge Injection
CS (Off)
−65
−70
300
0.7
6
6
7.5
13.5
RL = 100 Ω
CL = 1 nF; VS = 0 V; Figure 14
pC typ
pF typ
pF typ
pF typ
CD (Off)
CD, CS (On)
POWER REQUIREMENTS
IDD
VDD = 5.5 V; digital inputs = 0 V or VDD
0.001
µA typ
1
µA max
1 Temperature range for B Version is −40°C to +85°C.
2 Guaranteed by design, not subject to production test.
Rev. 0 | Page 3 of 12
ADG794
VDD = 3 V 10%, GND = 0 V. All specifications TMIN to TMAX, unless otherwise noted.
Table 2.
B Version1
Parameter
25°C
TMIN to TMAX
Unit
Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range
0 to 1.5
V
On Resistance (RON
)
7
9.5
0.3
Ω typ
Ω max
Ω typ
Ω max
Ω typ
Ω max
VD = 0 V to 1 V; IS = −10 mA; Figure 6
VD = 0 V to 1 V; IS = −10 mA
11
0.9
5
On Resistance Match between Channels (∆RON
)
On Resistance Flatness (RFLAT(ON)
)
2.6
VD = 0 V to 1 V; IS = −10 mA
LEAKAGE CURRENTS
Source Off Leakage, IS (Off)
Drain Off Leakage, ID (Off)
Channel On Leakage, ID, IS (On)
DIGITAL INPUTS
0.001
0.001
0.001
nA typ
nA typ
nA typ
VS = 2 V/1 V; VD = 1 V/2 V; Figure 7
VS = 2 V/1 V; VD = 1 V/2 V; Figure 7
VD = VS = 2 V/1 V; Figure 8
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current
2.0
0.4
V min
V max
IINL or IINH
0.001
µA typ
µA max
pF typ
VIN = VINL or VINH
0.1
3
Digital Input Capacitance, CIN
DYNAMIC CHARACTERISTICS2
EN
)
8
6
3
ns typ
ns max
ns typ
ns max
ns typ
ns min
dB typ
dB typ
MHz typ
% typ
CL = 35 pF; RL = 50 Ω
VS = 1.5 V; Figure 9
CL = 35 pF; RL = 50 Ω
VS = 1.5 V; Figure 9
CL = 35 pF; RL = 50 Ω
VS1 = VS2 = 1.5 V; Figure 10
f = 10 MHz; RL = 50 Ω; Figure 12
f = 10 MHz; RL = 50 Ω; Figure 13
RL = 50 Ω; Figure 11
tON, tON
(
16
10
1
EN
( )
tOFF, tOFF
Break-Before-Make Time Delay, tD
Off Isolation
Channel-to-Channel Crosstalk
Bandwidth −3 dB
Distortion
Charge Injection
CS (Off)
−65
−70
300
2.6
4
6
7.5
13.5
RL = 100 Ω
CL = 1 nF; VS = 0 V; Figure 14
pC typ
pF typ
pF typ
pF typ
CD (Off)
CD, CS (On)
POWER REQUIREMENTS
IDD
VDD = 3.3 V; digital inputs = 0 V or VDD
0.001
µA typ
1
µA max
1 Temperature range for B Version is −40°C to +85°C.
2 Guaranteed by design, not subject to production test.
Rev. 0 | Page 4 of 12
ADG794
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Stresses above those listed under Absolute Maximum Ratings
Parameters
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.
VDD to GND
Analog, Digital Inputs1
−0.3 V to +6 V
−0.3 V to VDD + 0.3 V or
30 mA, whichever occurs
first
Continuous Current, S or D
Peak Current, S or D
100 mA
300 mA (pulsed at 1 ms,
10% duty cycle max)
Operating Temperature Range
Industrial (B Version)
Table 4. Truth Table
−40°C to +85°C
−65°C to +150°C
150°C
566 mW
149.97°C/W
EN
IN
D1
D2
D3
D4
Function
Storage Temperature Range
Junction Temperature
QSOP Package, Power Dissipation
θJA Thermal Impedance
Lead Temperature, Soldering
Vapor Phase (60 s)
1
0
0
X
0
1
Hi-Z
S1A
S1B
Hi-Z
S2A
S2B
Hi-Z
S3A
S3B
Hi-Z
S4A
S4B
Disable
IN = 0
IN = 1
215°C
220°C
Infrared (15 s)
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. 0 | Page 5 of 12
ADG794
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
S1A
S1B
D1
V
DD
EN
ADG794
TOP VIEW
(Not to Scale)
S4A
S4B
D4
S2A
S2B
D2
S3A
S3B
D3
GND
Figure 2. Pin Configuration
Table 5. Pin Function Descriptions
Pin Number Mnemonic Description
1
2
3
4
IN
Logic Control Input. The logic level at this input controls the operation of the multiplexers (see Table 4).
A-Side Source Terminal of MUX1. Can be an input or output.
B-Side Source Terminal of MUX1. Can be an input or output.
Drain Terminal of MUX1. Can be an input or output.
S1A
S1B
D1
5
6
7
S2A
S2B
D2
A-Side Source Terminal of MUX2. Can be an input or output.
B-Side Source Terminal of MUX2. Can be an input or output.
Drain Terminal of MUX2. Can be an input or output.
8
9
GND
D3
Ground Reference.
Drain Terminal of MUX3. Can be an input or output.
10
11
12
13
14
15
16
S3B
S3A
D4
S4B
S4A
EN
B-Side Source Terminal of MUX3. Can be an input or output.
A-Side Source Terminal of MUX3. Can be an input or output.
Drain Terminal of MUX4. Can be an input or output.
B-Side Source Terminal of MUX4. Can be an input or output.
A-Side Source Terminal of MUX4. Can be an input or output.
MUX Enable Logic Input. Enables or disables the multiplexers (see Table 4).
Positive Power Supply Voltage.
VDD
Rev. 0 | Page 6 of 12
ADG794
TERMINOLOGY
VDD
CS (Off)
Most positive power supply potential.
Off switch source capacitance. Measured with reference to
ground.
IDD
Positive supply current.
CD (Off)
Off switch drain capacitance. Measured with reference to
ground.
GND
Ground (0 V) reference.
CD, CS (On)
S
On switch capacitance. Measured with reference to ground.
Source terminal. Can be either an input or an output.
CIN
D
Digital input capacitance.
Drain terminal. Can be either an input or an output.
tON
IN
Delay time between the 50% and the 90% points of the digital
input and switch on condition.
Logic control input.
VD (VS)
tOFF
Analog voltage on terminals D, S.
Delay time between the 50% and the 90% points of the digital
input and switch off condition.
RON
Ohmic resistance between D and S.
tBBM
On or off time measured between the 80% points of both
switches when switching from one to another.
RFLAT (ON)
Flatness is defined as the difference between the maximum and
minimum value of on resistance as measured.
Charge Injection
A measure of the glitch impulse transferred from the digital
input to the analog output during on/off switching.
∆RON
On resistance match between any two channels.
Off Isolation
IS (Off)
A measure of unwanted signal coupling through an off switch.
Source leakage current with the switch off.
Crosstalk
ID (Off)
A measure of unwanted signal that is coupled through from one
channel to another as a result of parasitic capacitance.
Drain leakage current with the switch off.
ID, IS (On)
−3 dB Bandwidth
The frequency at which the output is attenuated by 3 dB.
Channel leakage current with the switch on.
VINL
On Response
The frequency response of the on switch.
Maximum input voltage for Logic 0.
VINH
Insertion Loss
The loss due to the on resistance of the switch.
Minimum input voltage for Logic 1.
IINL (IINH
Input current of the digital input.
)
THD + N
The ratio of the harmonic amplitudes plus noise of a signal to
the fundamental.
Rev. 0 | Page 7 of 12
ADG794
TYPICAL PERFORMANCE CHARACTERISTICS
0
0
–20
–20
–40
–40
–60
–60
–80
–80
–100
–100
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 4. Crosstalk vs. Frequency
Figure 3. Off Isolation vs. Frequency
TYPICAL APPLICATION
ADG794
R
G
R OUTPUT
RGB VIDEO
SIGNAL SOURCE
1
G OUTPUT
B OUTPUT
B
AUDIO/SYNC/
OTHER OUTPUT
AUDIO/SYNC/OTHER
SIGNAL SOURCE 1
R
IN
EN
RGB VIDEO
SIGNAL SOURCE
2
G
B
AUDIO/SYNC/OTHER
SIGNAL SOURCE 2
Figure 5. Audio/Video Switch
Rev. 0 | Page 8 of 12
ADG794
TEST CIRCUITS
I
DS
V1
I
(ON)
D
I
(OFF)
A
I
(OFF)
A
S
D
S
D
A
NC
S
D
S
D
V
D
V
R
= V1/I
DS
V
V
D
S
ON
S
NC = NO CONNECT
Figure 6. On Resistance
Figure 7. Off Leakage
Figure 8. On Leakage
5V
0.1µF
3V
V
IN
V
DD
50%
50%
V
L
OUT
S
D
90%
90%
V
S
R
100Ω
C
L
V
OUT
35pF
IN
tOFF
tON
EN
GND
Figure 9. Switching Times
5V
0.1µF
V
DD
3V
V
IN
S1A
S1B
50%
50%
V
L
OUT
D1
0V
V
S
R
100Ω
C
V
50%
50%
L
OUT
V
S
35pF
V
S
DECODER
IN GND
tD
tD
EN
Figure 10. Break-Before-Make Time Delay
V
DD
0.1µF
ADG794
NETWORK
ANALYZER
S1A
50Ω
V
S
IN
V
V
IN
OUT
D1
50Ω
EN
GND
Figure 11. Bandwidth
Rev. 0 | Page 9 of 12
ADG794
V
DD
0.1µF
ADG794
NETWORK
ANALYZER
S1A
50Ω
50Ω
V
S
IN
V
V
IN
OUT
D1
50Ω
EN
GND
Figure 12. Off Isolation
V
DD
0.1µF
NETWORK
ANALYZER
ADG794
S1A
S2A
50Ω
V
V
S
OUT
R
50Ω
L
IN
D2
D1
50Ω
V
IN
50Ω
GND
EN
Figure 13. Channel-to-Channel Crosstalk
5V
V
DD
ADG794
R
S
S1A
D1 V
D2 V
D3 V
D4 V
OUT
OUT
OUT
OUT
3V
C
1nF
L
S1B
S2A
V
S
V
EN
C
L
1nF
S2B
S3A
V
∆V
OUT
OUT
Q
= C × ∆V
L OUT
C
L
1nF
S3B
S4A
INJ
C
L
S4B
1nF
1 OF 2
DECODER
IN
EN
Figure 14. Charge Injection
Rev. 0 | Page 10 of 12
Preliminary Technical Data
OUTLINE DIMENSIONS
ADG794
0.193 (4.90)
BSC
16
1
9
8
0.154
(3.91)
BSC
0.236
(5.99)
BSC
PIN 1
0.069 (1.75)
0.053 (1.35)
0.065 (1.65)
0.049 (1.24)
8°
0°
0.010 (0.25)
0.004 (0.10)
0.025 (0.14) 0.012 (0.30)
0.050 (1.27)
0.016 (0.41)
SEATING
PLANE
0.010 (0.25)
0.006 (0.15)
BSC
0.008 (0.20)
COPLANARITY
0.004 (0.10)
COMPLIANT TO JEDEC STANDARDS MO-137AB
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETERS DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
Figure 15. 16-Lead Shrink Small Outline Package [QSOP]
(RQ-16)
Dimensions shown in inches and (millimeters)
ORDERING GUIDE
Model
Temperature Range
Package Description
Package Option
ADG794BRQZ1
16-Lead Shrink Small Outline Package (QSOP)
16-Lead Shrink Small Outline Package (QSOP)
16-Lead Shrink Small Outline Package (QSOP)
16-Lead Shrink Small Outline Package (QSOP)
RQ-16
RQ-16
RQ-16
RQ-16
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
ADG794BRQZ-500RL71
ADG794BRQZ-REEL1
ADG794BRQZ-REEL71
1 Z = Pb-free part.
Rev. 0 | Page 11 of 12
ADG794
NOTES
©
2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05150–0–10/04(0)
Rev. 0 | Page 12 of 12
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