Evaluation Board for ADG824, 0.5 Ω CMOS,
1.65 V to 3.6 V, Dual SPDT/2:1 Mux in Mini LFCSP
EVAL-ADG824
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. 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. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
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 ©2008 Analog Devices, Inc. All rights reserved.
FEATURES
Full featured evaluation board for the ADG824
On-board audio connectors
GENERAL DESCRIPTION
This data sheet describes the evaluation board for the ADG824,
which is a low voltage CMOS device that contains two
independently selectable, single-pole, double-throw (SPDT)
switches. The ADG824 offers ultralow on resistance of less than
0.7 Ω over the full temperature range.
Figure 1 shows the EVAL-ADG824. The ADG824 is soldered
onto the evaluation board in a tiny 1.3 mm × 1.6 mm ultrathin
LFCSP located in the center of the board and is designated as U1.
The evaluation kit contains a fully fitted PCB and a CD that
contains the ADG824 data sheet and the EVAL-ADG824 data
sheet. Refer to the ADG824 data sheet for full data on the part.
Consult the ADG824 data sheet in conjunction with this data
sheet when using the evaluation board.
CONNECTING SIGNALS TO THE BOARD
The board is fitted with three audio connectors that allow
switching between audio devices. All signals applied to the switch
can be monitored using the test points provided on the board.
EVALUATION BOARD
06754-001
Figure 1.
EVAL-ADG824
Rev. 0 | Page 2 of 8
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Connecting Signals to the Board .................................................... 1
Evaluation Board .............................................................................. 1
Revision History ............................................................................... 2
Hardware Description ...................................................................... 3
Power Supply ................................................................................. 3
Switch Control Connectors ......................................................... 3
Evaluation Board Schematics ...........................................................4
ADG824 Switch Pins, Test Points, and Connections ...............5
PCB Drawings ....................................................................................6
Ordering Information .......................................................................8
Component’s List ...........................................................................8
Ordering Guide .............................................................................8
ESD Caution...................................................................................8
REVISION HISTORY
6/08—Revision 0: Initial Version
EVAL-ADG824
Rev. 0 | Page 3 of 8
HARDWARE DESCRIPTION
06754-002
ADG824 EVALUATION BOARD
TO AUDIO
DEVI CE 1
AUDIO
DEVI CE 1
ADG824
TO AUDIO
DEVI CE 2
AUDIO
DEVI CE 2 AUDIO
DEVICE 3
TO AUDIO
DEVICE 3
L3 L2
SMB CO NNE CTO RS
CONT RO L SECT I O N:
SWITCHE S CAN BE CONTROLLED
MANUALLY BY CHANGI NG JUMP E R
POSITIO NS OR FROMAN EXTERNAL
SIGNAL SO URCE TO T HE
SMB CO NNECTORS.
Figure 2. Evaluation Board Block Diagram
The ADG824 evaluation kit contains a fully fitted PCB and a
CD that contains the ADG824 data sheet and the EVAL-ADG824
data sheet.
The evaluation board allows the user to switch between two
audio sources or to switch an audio source between two
speakers by using the on-board jumpers or by applying the
correct control signals to the appropriate connectors. The
following sections describe in detail the function of the
connectors and links.
POWER SUPPLY
For convenience, a regulator supplies the ADG824 with a 3.3 V
supply. A supply range of 3.3 V to 12 V can be connected to J6.
SWITCH CONTROL CONNECTORS
The ADG824 device offers a standard CMOS/LVTTL parallel
interface consisting of two IN inputs. The IN1 and IN2 input
pins control the switch state and operation mode of the
ADG824. The evaluation board allows the user to control the
signals required to set the logic levels applied to these pins by
using the L2 and L3 links as described in Table 1 or by applying
external signals to the SMB connectors, IN1 and IN2, as
described in Table 2.
To control the ADG824 using the SMB connectors, L2 and L3
must be set to Position B. Note that there are 51 Ω termination
resistors to GND at the IN1 and IN2 SMB connectors.
Table 1. Control via Link L2/Link L3
L2 and L3 Position
Switch Status
Audio Device 1 Status Audio Device 2 Status
B Inactive Active
A Active Inactive
Table 2. Control via SMB Connector Settings
L2 and L3 Position Switch Status—Audio Device Status
B SMB High = Audio Device 2 Active
SMB Low = Audio Device 1 Active
EVAL-ADG824
Rev. 0 | Page 4 of 8
EVALUATION BOARD SCHEMATICS
06754-003
Not M ount ed
Not M ount ed
ADG824
Figure 3. Evaluation Board Schematic
EVAL-ADG824
Rev. 0 | Page 5 of 8
ADG824 SWITCH PINS, TEST POINTS, AND CONNECTIONS
Table 3.
Connector Name Board Pin Mnemonic Pin Number ADG824 Mnemonic Test Point
J2 Phono Top 1 S2A T9
Phono Bottom 2 S1A T1
J3 Phono Top 1 S2B T7
Phono Bottom 2 S1B T3
J6-1 External 5V 1 VDD T6
J6-2 GND 2 GND T10
J5 Phono Top 3 D2 T8
Phono Bottom 2 D1 T2
EVAL-ADG824
Rev. 0 | Page 6 of 8
PCB DRAWINGS
06754-004
Figure 4. Silkscreen Image of the Board
06754-005
Figure 5. PCB Drawing Layer 1 (Top Layer of the Board)
EVAL-ADG824
Rev. 0 | Page 7 of 8
06754-006
Figure 6. PCB Drawing Layer 2 (Bottom Layer)
EVAL-ADG824
Rev. 0 | Page 8 of 8
ORDERING INFORMATION
COMPONENT’S LIST
Table 4.
Reference Designator Description Value Supplier Name and Number
C1 to C3, C6, C7 Capacitor 0.1 μF FEC 9406140
C4, C5 Capacitor+ 10 μF FEC 1190117
D2 LED
FEC 8529906
J2, J3 Phono Digi-Key CP-1435-ND
J6 CON\POWER
FEC 151785
J7, J8 SMB FEC 1019324
J5 Phono
Digi-Key CP-1435-ND
L2 to L3 JUMPER2\SIP3 FEC 3291698 and FEC 150411
R1 Resistor 1 kΩ FEC 1160322
R2, R3 Resistor 10 kΩ FEC 1160359
R4, R5 Resistor 51 Ω FEC 9331336
T1 to T10 Test point FEC 8731128
U1 ADG824
Analog Devices, Inc., ADG824
U6 ADP3303-3.3
Analog Devices ADP3303ARZ-3.3
ORDERING GUIDE
Model Description
EVAL-ADG824EBZ1
ESD CAUTION
Evaluation Board
1 Z = RoHS Compliant Part.
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB06754-0-6/08(0)
