CM1483
Praetorian
®
L-C EMI Filter with ESD Protection
for Headset Speaker Applications
Features
•
•
•
•
•
2 channels of EMI filtering
±8kV ESD protection (IEC 61000-4-2, contact
discharge)
±15kV ESD protection (HBM)
Greater than -40dB of attenuation at 1GHz
TDFN-08 package
to electrostatic discharge (ESD). The ESD diodes
connected to the filter ports safely dissipate ESD
strikes of ±8kV, beyond the maximum requirement of
the IEC61000-4-2 international standard. Using the
MIL-STD-883 (Method 3015) specification for Human
Body Model (HBM) ESD, the pins are protected for
contact discharges at greater than ±15kV.
This device is particularly well suited for portable
electronics (e.g. mobile handsets, PDAs, notebook
computers) because of its small package format and
easy-to-use pin assignments. In particular, the
CM1483 is ideal for EMI filtering and protecting
speaker output lines from ESD for the headset speaker
in mobile handsets. Most speakers have impedance of
8
Ω
and in order to maximize the power output, the
resistance of an EMI filter needs to be as low as
possible and the CM1483 addresses this by having a
C-L-C based EMI filter where the inductor has less
than 1
Ω
of resistance.
The CM1483 is available in a small, low-profile (2mm x
2mm) 8-lead TDFN package in a lead-free finish.
Applications
•
•
•
Headset Speaker port in mobile handsets
I/O port protection for mobile handsets, notebook
computers, PDAs, etc.
EMI filtering for data ports in cell phones, PDAs or
notebook computers
Product Description
California Micro Devices’ CM1483 is an L-C EMI filter
array with ESD protection, which integrates two Pi-
filters (C-L-C) for the headset speaker. The CM1483
has component values of 100pF-3nH-100pF. The parts
include ESD protection diodes on all input/output pins,
which provide a very high level of protection for
sensitive electronic components that may be subjected
Electrical Schematic
3nH
Filter #1
1
100pF
C
3nH
L
L
100pF
C
8
Filter #1
Filter #2
4
5
100pF
C
Filter #2
100pF
C
© 2007 California Micro Devices Corp. All rights reserved.
06/14/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
1
CM1483
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
DC current per inductor
DC package power rating
RATING
–65 to +150
30
0.5
UNITS
°C
mA
W
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature Range
RATING
–40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS
(NOTE 1)
SYMBOL PARAMETER
L
R
C
TOT
C
I
LEAK
V
SIG
Inductance
DC Channel Resistance
Total Channel Capacitance
Capacitance C
Diode Leakage Current
CONDITIONS
Note 3
Note 3
2.5V DC; 1MHz, 30mV AC
2.5V DC; 1MHz, 30mV AC
V
IN
= +5V
V
IN
=-5V
Signal Clamp Voltage
Positive Clamp
Negative Clamp
I
LOAD
= 10mA
I
LOAD
= –10mA
5
–15
±15
±8
31
160
MIN
TYP
3.0
0.75
200
100
0.1
-1.0
7
–10
1.0
0.1
15
–5
1
240
MAX
UNITS
nH
Ω
pF
pF
μA
μA
V
V
kV
kV
MHz
V
ESD
In-system ESD Withstand Voltage
Notes 2 & 3
Human Body Model, MIL-STD-883,
Method 3015
Contact Discharge per IEC 61000-
4-2 Level 4
Cut-off frequency
Z
SOURCE
= 50
Ω
, Z
LOAD
= 50
Ω
L = 3nH, C = 100pF
f
C
Note 1: T
A
= 25°C unless otherwise specified.
Note 2: ESD applied to input and output pins with respect to GND, one at a time.
Note 3: These parameters guaranteed by design and characterization.
© 2007 California Micro Devices Corp. All rights reserved.
06/14/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
3
CM1483
Mechanical Details
TDFN-08 Mechanical Specifications, 0.5mm
The CM1483 is supplied in an 8-lead 0.5mm TDFN
package. Dimensions are presented below.
For complete information on the TDFN-08, see the Cal-
ifornia Micro Devices TDFN Package Information doc-
ument.
Mechanical Package Diagrams
D
8 7 6 5
PACKAGE DIMENSIONS
Package
JEDEC
No.
Leads
Dim.
A
A3
b
D
D2
E
E2
e
K
L
# per
tape and
reel
0.20
0.20
0.30
0.40
0.20
1.90
1.50
1.90
0.80
Millimeters
Min
0.70
Nom
0.75
0.20 REF
0.25
2.00
1.60
2.00
0.90
0.50 BSC
0.30
2.10
1.70
2.10
1.00
Max
0.80
Min
0.028
0.008
0.075
0.059
0.075
0.031
0.008
0.008
0.012
0.016
3000 pieces
TDFN
MO-229 (Var. VCCD-3)
*
8
Inches
Nom
0.030
0.010
0.079
0.063
0.079
0.035
0.008 REF
0.012
0.083
0.067
0.083
0.039
0.10 C
E
Pin 1
Marking
Max
0.031
1 2 3 4
TOP VIEW
0.020 BSC
SIDE VIEW
A
A3
1 2 3 4
Controlling dimension: millimeters
D2
*
This package is compliant with JEDEC standard MO-229, variation
VCCD-3 with exception of the D2 and E2 dimensions as called out in
the table above and the r1 dimension which is not specified in the
MO-229 standard.
GND PAD
E2
C0.25
R
L
K
e
8 7 6 5
b
8X
BOTTOM VIEW
0.10
M
CAB
Package Dimensions for 8-Lead, 0.5mm pitch
TDFN package
© 2007 California Micro Devices Corp. All rights reserved.
06/14/07
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
5
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