ANPEC APA4880 Service Manual

APA4880

APA4880

Stereo 330mW 8Ω Speak Driver With Mute

Features

•Operating Voltage

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

•Depop Circuitry Integrated.

•	High Signal-to-Noise Ratio	100dB
•	High Slew Rate	5.5V/ms
•	Low Distortion	-66dB

•Output Power at 10% THD+N

into 8Ω	330mW
into 16Ω	200mW

•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,TSSOP or PDIP Package

Applications

•Portable Digital Audio

•Personal Computers

•Microphone Preamplifier

•CD ROM Player

•Headphone Amplifier

Gereral Description

The APA4880 is an integrated class AB stereo headphone amplifier contained in an SO-8 or a DIP-8 plastic package. The APA4880 is capable of delivering 330mW 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. Both of the depop circuitry and mute circuitry are integrated in the APA4880 , that reduces pops and clicks noise during power up and when using the mute mode(high active).

Ordering and Marking Information

A P A 4 8 8 0

L e a d F re e C o d e

H a n d lin g C o d e

T e m p . R a n g e

P a c k a g e C o d e

P a c k a g e C o d e
J : P D IP - 8	K : S O P - 8	O : T S S O P -8
T e m p . R a n g e
I : - 4 0 to 8 5 °	C
H a n d lin g C o d e
T U : T u b e	T R : T a p e & R e e l
L e a d F re e C o d e

L : L e a d F re e D e v ic e B la n k : O rig in a l D e v ic e

	A P A 4 8 8 0 J :	A P A 4 8 8 0	X X X X X - D a te C o d e
		X X X X X
	A P A 4 8 8 0 K /O :	A P A 4 8 8 0	X X X X X - D a te C o d e
		X X X X X

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	www.anpec.com.tw
Rev. A.4 - Jan., 2003

APA4880

Block Diagram

OutA	1					8	V D D
INA 2		A	+	B	-	7	OutB
		-		+
Bypass 3						6	INB
VS S	4			M U T E		5	Mute
			APA4880

Pin Function Description

Pin Name	No	I/O	Description
OUTA	1	O	Channel A output pin
INA	2	I	Audio input channel A
Bypass	3	I	Connect to voltage divider for internal mid_supply bias
VSS	4		Ground or negative supply voltage connection for circuitry.
Mute	5	I	mute mode control signal input, place entire IC in mute mode when held
			µ
			high, Imute=140 A
INB	6	I	Audio input channel B
OUTB	7	O	Channel B output pin
VDD	8		Supply voltage input pin

Absolute Maximum Ratings

Symbol	Parameter	Rating	Unit
VDD	Supply Voltage	5	V
TSC(O)	Output Short-Circuit Duration , at TA=25° C , PTOT=1W	20	S
TA	Operating Ambient Temperature range	-40 to 85	° C
TJ	Maximum Junction Temperature	150	° C
TSTG	Storage Temperature Range	-65 to+150	° C
TS	Soldering Temperature , 10 seconds	260	° C
V	Electrostatic Discharge	-3000 to 3000*1	V
ESD

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

Copyright ANPEC Electronics Corp.

2

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Rev. A.4 - Jan., 2003

APA4880

Thermal Characteristics

Symbol	Parameter	Value	Unit
RTHJA	Thermal Resistance from Junction to Ambient in Free Air
	SO-8	210	K/W
	TSSOP-8	220
	PDIP-8	109

Electrical Characteristics

TA=25°C, VDD=5V, VSS=0V, f=1kHz (unless otherwise noted)

Symbol	Parameter	Test Conditions		APA4880				Unit
			Min.		Typ.		Max.
IDD	Supply Current	No Load			3.0			mA
IMUTE	Mute Current	VPINS			140			uA
VI(OS)	Input Offset Voltage				5			mV
AC Characteristics
(THD+N)/S	Total Harmonic Distortion	PO=200mW , RL=8Ω , f=1kHz			0.05			%
	plus Noise to Signal Ratio	PO=120mW , RL=16Ω , f=1kHz			0.04
		PO=75mW , RL=32Ω , f=1kHz			0.03
Po	Output Power	(THD+N)/S=0.1% , f=1kHz						mW
		RL=8Ω			240
		RL=16Ω			150
		RL=32Ω			85
		(THD+N)/S=10% , f=1kHz
		RL=8Ω			330
		RL=16Ω			200
		RL=32Ω			110
PSRR	Power Supply Rejection	CS=2.2uF , VRIPPLE=200mVRMS ,			50			dB
	Ratio	f=120Hz
ATT	Mute attenuation	Vin=1Vrms , RL=8Ω			85			dB
Xtalk	Channel Separation	PO=200mV , RL=8Ω , Cb=2.2µ F			85			dB
Gv	Open Loop Gain				100			dB
Fg	Unity Gain Frequency				7			MHz
SR	Slew Rate				5.5			V/us
S/N	Signal to Noise Ratio	Vin=1Vrms , RL=8Ω			20			uVrms

Copyright ANPEC Electronics Corp.	3	www.anpec.com.tw
Rev. A.4 - Jan., 2003

APA4880

Test And Application Circuits

			+5V
		220pF	0.1µ F	100µ F
		15kΩ
			8
2.2µ F	15kΩ		V DD		220µ F
Vin A	2	INA		O U T A
					1
		200kΩ
	3	Bypass	Click and POP	Mute	Mute
			Suppression Circuit
	2.2µ F
		200kΩ
2.2µ F	15kΩ				220µ F
		INB		O U T B	7
Vin B	6
			G N D
		15kΩ	4
		220pF

Copyright ANPEC Electronics Corp.

4

www.anpec.com.tw

Rev. A.4 - Jan., 2003

APA4880

Typical Characteristics

(%)
Distortion+Noise	10
	5	VDD=5V
		RL=8Ω
	2	Av=-1
	1
Harmonic	0.5
	0.2	f=20Hz
			f=1kHz
	0.1
THD+N-Total	0.05	f=20kHz
	0.02
	0.01
	1 0 m	2 0 m 3 0 m 5 0 m 8 0 m	2 0 0 m	5 0 0 m

Output Power (W)

(%)
Distortion+Noise	5	VDD=5V
		RL=32Ω
	2	Av=-1
	1
Harmonic	0.5
			f=20Hz
	0.2		f=20kHz
	0.1
THD+N-Total	0.05
	0.02		f=1kHz
	0.01
	10m	20m 30m	50m 70m 100m	300m

Output Power (W)

(%)
Distortion+Noise	10
	5	VDD=5V
		RL=16Ω
	2	Av=-1
	1
Harmonic	0.5		f=20kHz
	0.2		f=20Hz
	0.1
THD+N-Total	0.05
			f=1kHz
	0.02
	0.01
	1 0 m	2 0 m 3 0 m	5 0 m 7 0 m 1 0 0 m	3 0 0 m

Output Power (W)

(%)
Distortion+Noise	10
	5	VDD=3V
		RL=8Ω
	2	Av=-1
	1
		f=20Hz
Harmonic	0.5
	0.2		f=20kHz
	0.1
THD+N-Total	0.05		f=1kHz
	0.02
	0.01
	1 0 m	2 0 m	3 0 m	5 0 m 7 0 m 1 0 0 m	2 0 0 m

Output Power (W)

Copyright ANPEC Electronics Corp.	5	www.anpec.com.tw
Rev. A.3 - Jun., 2001