View ADG794_192297.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Low Voltage, 300 MHz Quad 2:1 Mux Analog HDTV Audio/Video Switch ADG794
FEATURES
Bandwidth: 300 MHz Low insertion loss and on resistance: 5 typical On resistance flatness: 0.68 typical Single 3 V/5 V supply operation Low quiescent supply current: 1 nA typical Fast switching times: tON, 7 ns tOFF, 5 ns TTL/CMOS compatible
FUNCTIONAL BLOCK DIAGRAM
ADG794
S1A D1 S1B S2A D2 S2B S3A D3 S3B S4A D4 S4B 1 OF 2 DECODER
05150-001
APPLICATIONS
RGB switches HDTV DVD-R Audio/video switches
EN
IN
Figure 1.
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 over the input signal range. 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. The ADG794 operates from a single 3.3 V/5 V supply and is TTL logic compatible. The switches are controlled by the logic inputs IN and EN as shown in Table 4. The EN pin allows the user to disable all switches. 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.
PRODUCT HIGHLIGHTS
1. 2. 3. 4. Wide bandwidth: 300 MHz. Ultralow power dissipation. Crosstalk is typically -70 dB at 10 MHz. Off isolation is typically -65 dB at 10 MHz.
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 www.analog.com Fax: 781.326.8703 (c) 2004 Analog Devices, Inc. All rights reserved.
ADG794 TABLE OF CONTENTS
Specifications..................................................................................... 3 Single Supply ................................................................................. 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Terminology ...................................................................................... 7 Typical Performance Characteristics ..............................................8 Typical Application .......................................................................8 Test Circuits........................................................................................9 Outline Dimensions ....................................................................... 11 Ordering Guide .......................................................................... 11
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.
Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On Resistance Match between Channels (RON) On Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS Source Off Leakage, IS (Off) Drain Off Leakage, ID (Off) Channel On Leakage, ID, IS (On) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current IINL or IINH Digital Input Capacitance, CIN DYNAMIC CHARACTERISTICS2 tON, tON (EN) tOFF, tOFF (EN) Break-Before-Make Time Delay, tD Off Isolation Channel-to-Channel Crosstalk Bandwidth -3 dB Distortion Charge Injection CS (Off) CD (Off) CD, CS (On) POWER REQUIREMENTS IDD B Version1 25C TMIN to TMAX 0 to 2.5 5 7 0.4 0.7 1.35 0.001 0.001 0.001 2.4 0.8 0.001 0.1 3 7 14 5 8 3 1 -65 -70 300 0.7 6 6 7.5 13.5 0.001 1 8 1.2 Unit V typ max typ max typ max nA typ nA typ nA typ V min V max A typ A 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 A typ A max VIN = VINL or VINH Test Conditions/Comments
VD = 0 V to 1 V; IS = -10 mA; Figure 6 VD = 0 V to 1 V; IS = -10 mA VD = 0 V to 1 V; IS = -10 mA
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
CL = 35 pF; RL = 50 VS = 2 V; Figure 9 CL = 35 pF; RL = 50 VS = 2 V; Figure 9 CL = 35 pF; RL = 50 VS1 = VS2 = 2 V; Figure 10 f = 10 MHz; RL = 50 ; Figure 12 f = 10 MHz; RL = 50 ; Figure 13 RL = 50 ; Figure 11 RL = 100 CL = 1 nF; VS = 0 V; Figure 14
VDD = 5.5 V; digital inputs = 0 V or VDD
1 2
Temperature range for B Version is -40C to +85C. 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.
Parameter ANALOG SWITCH Analog Signal Range On Resistance (RON) On Resistance Match between Channels (RON) On Resistance Flatness (RFLAT(ON)) LEAKAGE CURRENTS Source Off Leakage, IS (Off) Drain Off Leakage, ID (Off) Channel On Leakage, ID, IS (On) DIGITAL INPUTS Input High Voltage, VINH Input Low Voltage, VINL Input Current IINL or IINH Digital Input Capacitance, CIN DYNAMIC CHARACTERISTICS2 tON, tON (EN) tOFF, tOFF (EN) Break-Before-Make Time Delay, tD Off Isolation Channel-to-Channel Crosstalk Bandwidth -3 dB Distortion Charge Injection CS (Off) CD (Off) CD, CS (On) POWER REQUIREMENTS IDD 25C B Version1 TMIN to TMAX 0 to 1.5 7 9.5 0.3 2.6 5 0.001 0.001 0.001 2.0 0.4 0.001 0.1 3 8 16 6 10 3 1 -65 -70 300 2.6 4 6 7.5 13.5 0.001 1 11 0.9 Unit V typ max typ max typ max nA typ nA typ nA typ V min V max A typ A 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 A typ A max VIN = VINL or VINH Test Conditions/Comments
VD = 0 V to 1 V; IS = -10 mA; Figure 6 VD = 0 V to 1 V; IS = -10 mA VD = 0 V to 1 V; IS = -10 mA
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
CL = 35 pF; RL = 50 VS = 1.5 V; Figure 9 CL = 35 pF; RL = 50 VS = 1.5 V; Figure 9 CL = 35 pF; RL = 50 VS1 = VS2 = 1.5 V; Figure 10 f = 10 MHz; RL = 50 ; Figure 12 f = 10 MHz; RL = 50 ; Figure 13 RL = 50 ; Figure 11 RL = 100 CL = 1 nF; VS = 0 V; Figure 14
VDD = 3.3 V; digital inputs = 0 V or VDD
1 2
Temperature range for B Version is -40C to +85C. Guaranteed by design, not subject to production test.
Rev. 0 | Page 4 of 12
ADG794 ABSOLUTE MAXIMUM RATINGS
TA = 25C, unless otherwise noted. Table 3.
Parameters VDD to GND Analog, Digital Inputs1 Ratings -0.3 V to +6 V -0.3 V to VDD + 0.3 V or 30 mA, whichever occurs first 100 mA 300 mA (pulsed at 1 ms, 10% duty cycle max) -40C to +85C -65C to +150C 150C 566 mW 149.97C/W 215C 220C
Continuous Current, S or D Peak Current, S or D Operating Temperature Range Industrial (B Version) Storage Temperature Range Junction Temperature QSOP Package, Power Dissipation JA Thermal Impedance Lead Temperature, Soldering Vapor Phase (60 s) Infrared (15 s)
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. Table 4. Truth Table
EN 1 0 0 IN X 0 1 D1 Hi-Z S1A S1B D2 Hi-Z S2A S2B D3 Hi-Z S3A S3B D4 Hi-Z S4A S4B Function Disable IN = 0 IN = 1
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
IN 1 S1A 2 S1B 3 D1 4 S2A 5 S2B 6 D2 7 GND 8
16 15
VDD EN S4A S4B D4 S3A S3B D3
05150-002
ADG794
TOP VIEW (Not to Scale)
14 13 12 11 10 9
Figure 2. Pin Configuration
Table 5. Pin Function Descriptions
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mnemonic IN S1A S1B D1 S2A S2B D2 GND D3 S3B S3A D4 S4B S4A EN VDD Description 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. 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. Ground Reference. Drain Terminal of MUX3. Can be an input or output. 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.
Rev. 0 | Page 6 of 12
ADG794 TERMINOLOGY
VDD Most positive power supply potential. IDD Positive supply current. GND Ground (0 V) reference. S Source terminal. Can be either an input or an output. D Drain terminal. Can be either an input or an output. IN Logic control input. VD (VS) Analog voltage on terminals D, S. RON Ohmic resistance between D and S. RFLAT (ON) Flatness is defined as the difference between the maximum and minimum value of on resistance as measured. RON On resistance match between any two channels. IS (Off) Source leakage current with the switch off. ID (Off) Drain leakage current with the switch off. ID, IS (On) Channel leakage current with the switch on. VINL Maximum input voltage for Logic 0. VINH Minimum input voltage for Logic 1. IINL (IINH) Input current of the digital input. CS (Off) Off switch source capacitance. Measured with reference to ground. CD (Off) Off switch drain capacitance. Measured with reference to ground. CD, CS (On) On switch capacitance. Measured with reference to ground. CIN Digital input capacitance. tON Delay time between the 50% and the 90% points of the digital input and switch on condition. tOFF Delay time between the 50% and the 90% points of the digital input and switch off condition. tBBM On or off time measured between the 80% points of both switches when switching from one to another. Charge Injection A measure of the glitch impulse transferred from the digital input to the analog output during on/off switching. Off Isolation A measure of unwanted signal coupling through an off switch. Crosstalk A measure of unwanted signal that is coupled through from one channel to another as a result of parasitic capacitance. -3 dB Bandwidth The frequency at which the output is attenuated by 3 dB. On Response The frequency response of the on switch. Insertion Loss The loss due to the on resistance of the switch. 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
ATTENUATION (dB) ATTENUATION (dB)
05150-003
-20
-40
-40
-60
-60
-80
-80
05150-004
-100 0.01
0.1
1
10
100
1000
-100 0.01
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 3. Off Isolation vs. Frequency
Figure 4. Crosstalk vs. Frequency
TYPICAL APPLICATION
ADG794
R R OUTPUT G RGB VIDEO SIGNAL SOURCE 1
G OUTPUT B OUTPUT
B AUDIO/SYNC/ OTHER OUTPUT AUDIO/SYNC/OTHER SIGNAL SOURCE 1 R
G RGB VIDEO SIGNAL SOURCE 2
EN
IN
B
05150-005
AUDIO/SYNC/OTHER SIGNAL SOURCE 2
Figure 5. Audio/Video Switch
Rev. 0 | Page 8 of 12
ADG794 TEST CIRCUITS
IDS V1 S D
IS (OFF)
A
05150-006
ID (OFF)
S D
ID (ON) NC S D A
05150-008
A
05150-007
VS
RON = V1/IDS
VS
VD
VD NC = NO CONNECT
Figure 6. On Resistance
5V 0.1F
Figure 7. Off Leakage
Figure 8. On Leakage
VIN VDD S VS IN EN GND D RL 100 VOUT
3V 50% 90% 50% 90%
CL 35pF
VOUT
tON
tOFF
05150-009
Figure 9. Switching Times
5V 0.1F
VDD S1A D1 VS S1B VS DECODER EN IN GND RL 100 CL 35pF VOUT VOUT VIN
3V 50% 0V 50% VS 50% 50%
tD
tD
05150-010
Figure 10. Break-Before-Make Time Delay
VDD 0.1F
ADG794
NETWORK ANALYZER S1A 50
IN
VS
VIN
D1
VOUT 50
05150-011
EN
GND
Figure 11. Bandwidth
Rev. 0 | Page 9 of 12
ADG794
VDD 0.1F
ADG794
NETWORK ANALYZER S1A 50 50 VS
IN
VIN
D1
VOUT 50
05150-012
EN
GND
Figure 12. Off Isolation
VDD 0.1F
ADG794
S1A
NETWORK ANALYZER
50 S2A IN D2 VIN EN GND D1 50
05150-013
VOUT RL 50
VS
50
Figure 13. Channel-to-Channel Crosstalk
5V
VDD
ADG794
RS VS S1A S1B S2A S2B S3A S3B S4A S4B 1 OF 2 DECODER EN IN
05150-014
CL 1nF CL 1nF CL 1nF CL 1nF
D1 VOUT VEN D2 VOUT VOUT D3 VOUT
3V
VOUT QINJ = CL x VOUT
D4 VOUT
Figure 14. Charge Injection
Rev. 0 | Page 10 of 12
Preliminary Technical Data OUTLINE DIMENSIONS
0.193 (4.90) BSC
16 9
ADG794
0.154 (3.91) BSC
1 8
0.236 (5.99) BSC
PIN 1 0.065 (1.65) 0.049 (1.24) 0.069 (1.75) 0.053 (1.35)
0.010 (0.25) 0.025 (0.14) 0.012 (0.30) 0.004 (0.10) SEATING BSC 0.008 (0.20) PLANE COPLANARITY 0.004 (0.10)
0.010 (0.25) 0.006 (0.15)
8 0
0.050 (1.27) 0.016 (0.41)
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 ADG794BRQZ1 ADG794BRQZ-500RL71 ADG794BRQZ-REEL1 ADG794BRQZ-REEL71 Temperature Range -40C to +85C -40C to +85C -40C to +85C -40C to +85C Package Description 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) Package Option RQ-16 RQ-16 RQ-16 RQ-16
1
Z = Pb-free part.
Rev. 0 | Page 11 of 12
ADG794 NOTES
(c) 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

▲Up To Search▲

Price & Availability of ADG794

	To Download ADG794 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .