CMD (Now ON) CSPEMI202A, CSPEMI202A User Manual

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 inte­grating two pi-style filters (C-R-C) that reduce EMI/RFI
emissions while at the same time providing ESD pro­tection. 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 stan­dard. Using the MIL-STD-883 (Method 3015) specifica­tion for Human Body Model (HBM) ESD, the device
provides protection for contact discharges to greater
than 15kV.

The CSPEMI202A is particularly well suited for porta­ble electronics (e.g., cellular telephones, PDAs, note­book 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

68

Ω

47pF47pF

68

Ω

47pF47pF

GND

A1

A3

B2

MIC_IN1

MIC_IN2

© 2003 California Micro Devices Corp. All rights reserved.

10/09/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: [phone] ▲ Fax: [phone] ▲ www.calmicro.com 1

C1

C3

MIC_OUT1

MIC_OUT2

PACKAGE / PINOUT DIAGRAMS

CSPEMI202A

BOTTOM VIEW

(Bumps Up View)

Orientation

Marking

(see note 2)

TOP VIEW

(Bumps Down View)

231

A

B

C

AD

Orientation

Marking

CSPEMI202A

Note:

1) These drawings are not to scale.

2) Lead-free devices are specified by using a "+" character for the top side orientation mark.

CSP Package

PIN DESCRIPTIONS

PIN NAME DESCRIPTION

A1 MIC_IN1 Microphone Input 1 (from microphone)

A3 MIC_IN2 Microphone Input 2 (from microphone)

B2 GND Device Ground

C1 MIC_OUT1 Microphone Output 1 (to audio circuitry)

C3 MIC_OUT2 Microphone Output 2 (to audio circuitry)

MIC_OUT1 MIC_OUT2

C3C1

GND

B2

MIC_IN1 MIC_IN2

A1 A3

A1

Ordering Information

PART NUMBERING INFORMATION

Standard Finish Lead-free Finish

Ordering Part

Bumps Package

5 CSP CSPEMI202A AD CSPEMI202AG AD

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

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

© 2003 California Micro Devices Corp. All rights reserved.

2 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: [phone] ▲ Fax: [phone] ▲ www.calmicro.com 10/09/03

Number

1

Part Marking

+" character for the top side orientation mark.

Ordering Part

Number

1

2

Part Marking