ANPEC APA4800 Service Manual

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APA4800

Stereo 290mW 8Ω Speaker Driver

Features

••

• O perating Voltage

••

Single Supply 3V to 7V Dual Supply ±1.5V to ± 3.5V

••

•

High Signal-to-Noise Ratio 100dB

••

• High Slew Rate 5V/ µs

••

• Low Distortion -65dB

••

• Output Power at 10% THD+N

••

into 8Ω !!!!!!!!!!!!!! 290mW into 16Ω !!!!!!!!!!!!!! 190mW

••

• Large Output Voltage Swing

••

• Excellent Power Supply Ripple Rejection

••

• Low Power Consumption

••

• Short-circuit Elimination

••

• Wide Temperature Range

••

• No Switch ON/OFF Clicks

••

• Available in 8 pin SOP or DIP Package

••

Ordering Information

Applications

••

• Portable Digital Audio

••

• Personal Computers

••

• Microphone Preamplifier

••

Gereral Description

The AP A4800 is an integrated class AB stereo headphone amplifier contained in an SO-8 or a DIP-8 plastic package . The APA4800 is capable of delivering 290mW of max . output power to an 8Ω load with less than 10% (THD+N) from a 5V power supply . The device has been primarily developed for portable digital audio applications .

APA4800

Handling Code Temp. Range Package Code

Package Code J : PDIP - 8 K : SOP - 8 Temp. Range I : - 40 to 85 C Handling Code TU : Tube TR : Tape & Reel

°

Block Diagram

1

Out A

Inverting Input A

Non-inverting Input A

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. Rev. A.2 - Apr., 2001

2

+

3

4

V

SS

--+

AP A4800

8

V

DD

7

Out B

6

Inverting Input B

5

Non-inverting Input B

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APA4800

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V

DD

T

SC (O)

T T

T

STG

T

V

ESD

Note: *1. Human body model : C=100pF, R=1500Ω, 3 positive pulses plus 3 negative pulses

Thermal Characteristics

Symbol Parameter Value Unit

R

Supply Voltage 5 V Output Short-circuit Duration, at TA=25°C, P Operating Ambient Temperature range -40 to 85

A

Maximum Junction Temperature 150

J

TOT

=1W

20 S

Storage Temperature Range -65 to +150 Soldering Temperature,10 seconds 260

S

Electrostatic Discharge -3000 to 3000

THJA

Thermal Resistance from Junction to Ambient in Free Air

DIP-8

109

*1

C

°

C

°

C

°

C

°

V

K/W

SO-8

Electrical Characteristics

V

DD

VDD=5V

I

DD

V

I(OS)

AC Characteristics

(THD+N)/S Total Harmonic Distortion

P

PSRR P ower S upply R ejection

S/N Signal to Noise Ratio

Power Supply Voltage 2.7 5.5

Supply Current No Load 2.5 mA Input Offset Voltage 5 50 mV

P

=200mW, RL=8Ω, f=1kHz plus Noise to Signal Ratio

Output P o wer (THD+N)/S=0.2%, f=1kHz mW

O

P

=120mW, RL=16Ω, f=1kHz

O

RL=8 RL=16

Output P o wer (THD+N)/S=10%, f=1kHz mW

O

RL=8 RL=16 C

=2.2 µF,V

Ratio

B

f=120Hz

=8

R

L

210

TA=25°C, f=1kHz( unless otherwise noted)

APA4800Symbol Parameter Test Conditions

Min. Typ. Max.

Ω

=200mVrms,

RIPPLE

Ω

K/W

0.1

0.05

210 140

290 190

55 dB 20

µ

Unit

V

%

Vrms

Copyright  ANPEC Electronics Corp. Rev. A.2 - Apr., 2001

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APA4800

Electrical Characteristics Cont. T

VDD=3V

I

DD

V

I(OS)

Supply Current No Load 2.2 mA Input Offset Voltage 5 mV

AC Characteristics

(THD+N)/S Total Harmonic Distortion

plus Noise to Signal Ratio

P

Output P o wer (THD+N)/S=0.2%, f=1kHz mW

O

Output P o wer (THD+N)/S=10%, f=1kHz mW

O

P

=50mW, RL=8Ω, f=1kHz

O

P

=40mW, RL=16Ω, f=1kHz

O

RL=8

Ω

RL=16

Ω

RL=8

Ω

RL=16

Ω

Test And Application Circuits

=25°C, f=1kHz( unless otherwise noted)

A

APA4800Symbol Parameter Test Conditions

Min. Typ. Max.

0.15 %

60 45

90 65

Unit

V

DD

V

INA

V

REF

typ.1/2V

V

INB

2.2

DD

2.2µF

220pF

220µF

15k

Ω

100

R

F

µ

R

1

F

µ

15k

2

-

Ω

+

3

5

6

APA4800

+

-

15k

Ω

220pF

8

4

7

220µF

V

OUTA

L

V

OUTB

L

Copyright  ANPEC Electronics Corp. Rev. A.2 - Apr., 2001

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APA4800

Typical Characteristics

THD+N vs Output Power

10

VDD= 5V

Ω

=8

R

L

AV= -1 BW<80kHz

1

THD+N (%)

0.1

0.01

10m 500m

Output Power (W)

f=20Hz

f=20kHz

f=1kHz

100m

THD+N vs Output Power

10

VDD= 5V

Ω

=16

R

L

AV= -1 BW<80kHz

1

THD+N (%)

0.1

0.01 10m 300m

f=20Hz

f=20kHz

f=1kHz

100m

Output Power (W)

10

VDD= 5V

=200mW

P

O

Ω

=8

R

L

NO FILTERS

1

THD+N (%)

0.1

0.01 20 20k100 1k

THD+N vs Frequency

AV= -2

= -5

A

V

AV= -1

Frequency (Hz)

10k

THD+N vs Frequency

10

VDD= 5V

=120mW

P

O

Ω

=16

R

L

NO FILTERS

1

THD+N (%)

0.1

0.01 20 20k100 1k

AV= -2 A

AV= -1

= -5

V

Frequency (Hz)

10k

Copyright  ANPEC Electronics Corp. Rev. A.2 - Apr., 2001

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