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10/09/03

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

L Tel: 408.263.3214

L Fax: 408.263.7846 L www.calmicro.com

CSPEMI202A

2 Channel Headset Microphone EMI Filter with ESD Protection

Features

Two channels of EMI filtering

Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network

Greater than 40dB attenuation at 1GHz

8kV ESD protection on each channel

(IEC 61000-4-2 Level 4, contact discharge)

15kV ESD protection on each channel (HBM)

Supports bipolar signals--ideal for
audio applications

Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance

5-bump, 0.950mm X 1.410mm footprint
Chip Scale Package (CSP)

Lead-free version available

Applications

EMI filtering and ESD protection for headset
microphone ports

Wireless Handsets

Handheld PCs / PDAs

MP3 Players

Digital Camcorders

Notebooks

Desktop PCs

Product Description

The CSPEMI202A is a dual low-pass filter array inte-
grating two pi-style filters (C-R-C) that reduce EMI/RFI
emissions while at the same time providing ESD pro-
tection. This part is custom-designed to interface with a
microphone port on a cellular telephone or similar
device. Each high quality filter provides more than
35dB attenuation in the 800-2700 MHz range. These
pi-style filters support bidirectional filtering, controlling
EMI both to and from a microphone element. They also
support bipolar signals, enabling audio signals to pass
through without distortion.

In addition, the CSPEMI202A provides a very high
level of protection for sensitive electronic components
that may be subjected to electrostatic discharge (ESD).
The input pins are designed and characterized to
safely dissipate ESD strikes of 8kV, the maximum
requirement of the IEC 61000-4-2 international stan-
dard. Using the MIL-STD-883 (Method 3015) specifica-
tion for Human Body Model (HBM) ESD, the device
provides protection for contact discharges to greater
than 15kV.

The CSPEMI202A is particularly well suited for porta-
ble electronics (e.g., cellular telephones, PDAs, note-
book computers) because of its small package format
and low weight. The CSPEMI202A is available in a
space-saving, low-profile Chip Scale Package with
optional lead-free finishing.

Electrical Schematic

47pF

MIC_OUT1

MIC_OUT2

GND

MIC_IN2

MIC_IN1

47pF

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

L Tel: 408.263.3214

L Fax: 408.263.7846 L www.calmicro.com

10/09/03

CSPEMI202A

Ordering Information

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.

Note 2: Lead-free devices are specified by using a "

" character for the top side orientation mark.

PIN DESCRIPTIONS

PIN

NAME

DESCRIPTION

MIC_IN1

Microphone Input 1 (from microphone)

MIC_IN2

Microphone Input 2 (from microphone)

GND

Device Ground

MIC_OUT1

Microphone Output 1 (to audio circuitry)

MIC_OUT2

Microphone Output 2 (to audio circuitry)

MIC_IN1

MIC_IN2

MIC_OUT1

MIC_OUT2

GND

Orientation

Marking

2 3

Orientation

Marking

(see note 2)

PACKAGE / PINOUT DIAGRAMS

Note:

CSPEMI202A

CSP Package

TOP VIEW

BOTTOM VIEW

(Bumps Down View)

(Bumps Up View)

2) Lead-free devices are specified by using a "

" character for the top side orientation mark.

1) These drawings are not to scale.

PART NUMBERING INFORMATION

Bumps

Package

Standard Finish

Lead-free Finish

Ordering Part

Number

Part Marking

Ordering Part

Number

Part Marking

CSP

CSPEMI202A

CSPEMI202AG

10/09/03

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

L Tel: 408.263.3214

L Fax: 408.263.7846

L www.calmicro.com

CSPEMI202A

Specifications

Note 1: T

=25

C unless otherwise specified.

Note 2: ESD applied to input and output pins with respect to GND, one at a time.
Note 3: Clamping voltage is measured at the opposite side of the EMI filter to the ESD pin. For example, if ESD is applied to Pin A1,

then clamping voltage is measured at Pin C1.

Note 4: Unused pins are left open
Note 5: These parameters are guaranteed by design and characterization.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

RATING

UNITS

Storage Temperature Range

-65 to +150

°C

DC Power per Resistor

100

DC Package Power Rating

200

STANDARD OPERATING CONDITIONS

PARAMETER

RATING

UNITS

Operating Temperature Range

-40 to +85

°C

ELECTRICAL OPERATING CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Resistance

Capacitance

LEAK

Diode Leakage Current

=5.0V

1.0

µA

SIG

Signal Voltage

Positive Clamp
Negative Clamp

LOAD

= 10mA

-5

-10

-15

V
V

ESD

In-system ESD Withstand Voltage

a) Human Body Model, MIL-STD-883,

Method 3015

b) Contact Discharge per IEC 61000-4-2

Level 4

Notes 2,4 and 5

±15

±8

Clamping Voltage during ESD Discharge
MIL-STD-883 (Method 3015), 8kV

Positive Transients
Negative Transients

Notes 2,3,4 and 5

+15

-19

V
V

Cut-off frequency
Z

SOURCE

= 50

, Z

LOAD

= 50

R = 68

, C = 47pF

MHz

10/09/03

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

L Tel: 408.263.3214

L Fax: 408.263.7846

L www.calmicro.com

CSPEMI202A

Application Information

Refer to Application Note AP-217, "The Chip Scale
Package", for a detailed description of Chip Scale
Packages offered by California Micro Devices.

Figure 3. Recommended Non-Solder Mask Defined Pad Illustration

Figure 4. Eutectic (SnPb) Solder

Ball Reflow Profile

Figure 5. Lead-free (SnAgCu) Solder

Ball Reflow Profile

PRINTED CIRCUIT BOARD RECOMMENDATIONS

PARAMETER

VALUE

Pad Size on PCB

0.275mm

Pad Shape

Round

Pad Definition

Non-Solder Mask defined pads

Solder Mask Opening

0.325mm Round

Solder Stencil Thickness

0.125 - 0.150mm

Solder Stencil Aperture Opening (laser cut, 5% tapered walls)

0.330mm Round

Solder Flux Ratio

50/50 by volume

Solder Paste Type

No Clean

Pad Protective Finish

OSP (Entek Cu Plus 106A)

Tolerance -- Edge To Corner Ball

+50

µm

Solder Ball Side Coplanarity

+20

µm

Maximum Dwell Time Above Liquidous

60 seconds

Soldering Maximum Temperature

260°C

Solder Mask Opening

0.325mm DIA.

Non-Solder Mask Defined Pad

0.275mm DIA.

Solder Stencil Opening

0.330mm DIA.

200

250

150

100

1:00.0

2:00.0

3:00.0

4:00.0

Time (minutes)

T
emperature (°

Part Number CSPEMI202A

Document Outline