APA2181DHAI-TRG Ver la hoja de datos (PDF) - Anpec Electronics

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Fabricante

APA2181DHAI-TRG

Low Supply Current, 50mW Stereo Cap-Free Headphone Driver

Anpec Electronics 

APA2181

Low Supply Current, 50mW Stereo Cap-Free Headphone Driver

Features

General Description

• Operating Voltage: 2.3V~5.5V

• Supply Current

- I =1mA at V =3.6V

DD

DD

• Low Shutdown Current

- IDD=5µA at VDD=3.6V

• Ground Reference Output

- No Output Capacitor Required (for DC Blocking)

- Save the PCB Space

- Reduce the BOM Costs

- Improve the Low Frequency Response

•

Output

Power

50mW/Ch

into

16Ω

at

V =3.6V

DD

• High PSRR: 80dB at 217Hz

• Fast Start-Up Time: 4ms

• Integrate the De-pop Circuitry

• Thermal Protection

• Integrated LDO (Low Dropout Regulator) for

Microphone Detection Circuit (1.9V)

• Surface-Mount Packaging

WLCSP1.6x1.6-12

• Lead Free and Green Devices Available

(RoHS Compliant)

Applications

The APA2181 is a stereo, fixed gain, single supply, and

cap-free headphone driver, which is available in a

WLCSP1.6x1.6-12 package.

The APA2181 is ground-reference output, and no need

the output capacitors for DC blocking. The advantages of

eliminating the output capacitor are saving the cost, elimi-

nating component height, and improving the low frequency

response.

The internal fixed gain setting (-1.5V/V) can minimize the

external component counts and save the PCB space. High

PSRR provides increased immunity to noise and RF

rectification. LDO is the best solution for microphone

detection circuit requirement, and it can lower the total

BOM costs.

The APA2181 is capable of driving 50mW at 3.6V into16Ω

load, and provides thermal protection.

Simplified Application Circuit

Stereo

RIN

Input

Signal

LIN

Shutdown SDN

Control

APA2181

Stereo

Headphone

ROUT

LOUT

LOUT To Microphone

Detection Circuit

• Handsets

• PDAs

• Portable Multimedia Devices

• Notebooks

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

Copyright © ANPEC Electronics Corp.

1

Rev. A.2 - Apr., 2010

www.anpec.com.tw

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