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ESD/EMI Protection for Microphone Ports
PROTECTION PRODUCTS - EMIClampTM Description
The EClamp 3202A is a low pass filter array with integrated TVS diodes for ESD protection. It is designed to provide bidirectional filtering of EMI/RFI signals and electrostatic discharge (ESD) protection in portable electronic equipment. This state-of-the-art device utilizes solid-state silicon-avalanche technology for superior clamping performance and DC electrical characteristics. They have been optimized for use on a microphone port in cellular phones and other protable electronics. The ECLAMP3202A effectively replaces 10 discrete components in a small SC-89 package to provide ESD protection and EMI filtering. Each device requires less than 2.9mm2 of PCB area with a low profile of only 0.60mm. This small package will protect and filter up to two lines. This small outline makes the device especially well suited for portable applications. The TVS diodes are bidirectional for supporting bipolar audio signals without distortion. The TVS diodes provide effective suppression of ESD voltages in excess of 15kV (air discharge) and 8kV (contact discharge) per IEC 61000-4-2, level 4. The device has very low insertion loss in the pass band and high attenuation at frequencies ranging from 800MHz to 3GHz. Each line features two stages of TVS diode protection. They feature large cross-sectional area junctions for conducting high transient currents. They offer desirable characteristics for board level protection including fast response time, low operating and clamping voltage, and no device degradation.
TM
ECLAMP3202A
PRELIMINARY
Features
Transient protection for data lines to IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) Bidirectional EMI/RFI filter with integrated ESD protection Protects two I/O lines Ultra-small SC-89 package (1.7 x 1.7 x 0.6mm 0.6mm) 1.7 2 requires less than 2.9mm of PCB area Working voltage: 5V Low leakage current Low operating and clamping voltages Solid-state silicon-avalanche technology
Mechanical Characteristics
SC-89 (SOT-666) package Lead Finish: Matte Tin Molding compound flammability rating: UL 94V-0 Marking : Marking Code RoHS/WEEE Compliant Packaging : Tape and Reel per EIA 481
Applications
Cellular Handsets and Accessories Cordless Phones Personal Digital Assistants (PDAs) Webpads & Handhelds Notebook Portable Instrumentation MP3 Players
Dimensions
1.70 0.50
Schematic & Pin Configuration
1.25
1.70
0.30
0.60
Revision 01/13/2006
1
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ECLAMP3202A
PROTECTION PRODUCTS Absolute Maximum Rating
R ating Steady-State Power ESD p er IEC 61000-4-2 (Air) ESD p er IEC 61000-4-2 (Contact) Soldering Temp erature Op erating Temp erature Storage Temp erature Symbol Pss VESD TL TJ TSTG Value 100 >16 >10 260 (10 seconds) -55 to +125 -55 to +150 Units mW kV
o
PRELIMINARY
C C C
o
o
Electrical Characteristics (T=25oC)
E C l am p 3202A P ar am et er T VS Reverse Stand-Off Voltage T VS Reverse Breakdown Voltage T VS Reverse Leakage Current Series Resistance Total Cap acitance S y m b ol VRWM V BR IR R CTOT It = 1mA VRWM = 5V, T=25C Each Line Any I/O to Ground VR = 0V, f = 1MHz 27 32 6 5 37 160 Con d i t i on s Mi n i mu m Ty p i c a l M ax i m u m 5 Units V V A Ohms pF
2006 Semtech Corp.
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ECLAMP3202A
PROTECTION PRODUCTS Typical Characteristics
Typical Insertion loss
CH1 S21 LOG 6 dB / REF 0 dB 1: -5.4948 dB 39.8MHz 2: -20.390 dB 900 MHz 0 dB
1
PRELIMINARY
Analog Crosstalk
CH1 S21 LOG 20 dB/ REF 0 dB
3: -14.199 dB 1.8 GHz 4: -11.011 dB 2.5 GHz
4 3
-6 dB -12 dB -18 dB -24 dB -30 dB -36 dB -42 dB 1 MHz START . 030 MHz 10 MHz 100 MHz
2
3 1 GHz GHz STOP 3 000. 000000 MHz
START . 030 MHz
STOP 3000. 000000 MHz
ESD Clamping (+8kV Contact)
ESD Clamping (-8kV Contact)
Capacitance vs. Reverse Voltage (Normalized to 0 volts)
1.6 1.4 1.2
CJ(VR) / CJ(VR=0))
1 0.8 0.6 0.4 0.2
f = 1 MHz
0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Reverse Voltage - VR (V)
2006 Semtech Corp.
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ECLAMP3202A
PROTECTION PRODUCTS Applications Information
Device Connection Options The ECLAMP3202A provides EMI filtering and ESD protection in a small SC-89 package for speaker port applications. The equivalent circuit diagram is shown below. The layout of the device is designed such that the data lines can be routed through the device. The first line pair enters at pins 1 and exits at pins 6. The second line pair enters at pins 3 and exits at pins 4. The device is symmetrical so the above connections may be reversed. Layout examples are shown to the right. Equivalent Circuit Diagram (Each Line) Layout Examples
PRELIMINARY
1
6
Microphone
2 3
ECLAMP3202A
5 4
Audio Codec
Option 1
Pin 1 6 3 Identification Line 1 In (From Microphone) Line 1 Out (To Audio Circuit) Line 2 In (From Microphone) Line 2 Out (To Audio Circuit) Ground
LOW PASS FILTER
4 2, 5
Circuit Board Layout Recommendations for Suppression of ESD. Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recommended: Place the TVS near the input terminals or connectors to restrict transient coupling. Minimize the path length between the TVS and the protected line. Minimize all conductive loops including power and ground loops. The ESD transient return path to ground should be kept as short as possible. Never run critical signals near board edges. Use ground planes whenever possible.
4
Microphone
5 6
ECLAMP3202A
3 2 1
Audio Codec
Option 2
Pin 6 1 4 3 2, 5 Identification Line 1 In (From Microp hone) Line 1 Out (To Audio Circuit) Line 2 In (From Microp hone) Line 2 Out (To Audio Circuit) Ground
2006 Semtech Corp.
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ECLAMP3202A
PROTECTION PRODUCTS Outline Drawing - SC-89 (SOT-666)
D A N E/2 E1 E c 1 e Nxb B aaa C A-B D A 2 L D DIM
A b c D E E1 e L L1 N aaa
PRELIMINARY
DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX
.019 .024 .005 .012 .003 .007 .059 .063 .067 .061 .063 .067 .043 .047 .049 .020 BSC .003 .008 .012 .003 .006 .008 6 .004 0.50 0.60 0.15 0.30 0.10 0.18 1.50 1.60 1.70 1.55 1.60 1.70 1.10 1.20 1.25 0.50 BSC 0.10 0.20 0.30 0.10 0.15 0.20 6 0.10
L1
C
NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
Land Pattern - SC-89 (SOT-666)
X
Y C
DIM
C P G X Y Z
DIMENSIONS INCHES MILLIMETERS
(.057) .020 .024 .012 .033 .090 (1.45) 0.50 0.60 0.30 0.85 2.30
Z
G
Y
P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET
2006 Semtech Corp.
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ECLAMP3202A
PROTECTION PRODUCTS Marking Code PRELIMINARY Ordering Information
Part Number EClamp 3202A.TCT Device Marking Z Qty per Reel 3,000 Reel Size 7 Inch
Z
Note: (1) Device is symmetrical so there is no pin 1 identifier.
EClamp and EMIClamp are trademarks of Semtech Corporation
Tape and Reel Specification
Z
Z
Z
Tape Specification and Device Orientation
Contact Information
Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804
www.semtech.com
2006 Semtech Corp.
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