Copyright
ANPEC Electronics Corp.
Rev. A.5 - Apr., 2001
APA4801
www.anpec.com.tw
1
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.
Stereo 280mW 8
Speaker Driver with Mute
APA4801
Package Code
J : PDIP-8
K : SOP-8
Temp. Range
I : - 40 to 85 C
Handling Code
TU : Tube
TR : Tape & Reel
Handling Code
Temp. Range
Package Code
Operating Voltage
Single Supply 3V to 7V
Dual Supply
1.5V to
3.5V
High Signal-to-Noise Ratio 100dB
High Slew Rate 5V/
s
Low Distortion -65dB
Output Power at 10% THD+N
into 8
280mW
into 16
160mW
Large Output Voltage Swing
Excellent Power Supply Ripple Rejection
Flexible Mute Function
Integrated Voltage Divider (V
DD
/2) to Elimi-
nate External Resistors
Low Power Consumption
Short-circuit Elimination
Wide Temperature Range
No Switch ON/OFF Clicks
Available in 8 pin SOP or DIP Package
Ordering Information
Features
The APA4801 is an integrated class AB stereo head-
phone amplifier contained in an SO-8 or a DIP-8 plas-
tic package with Mute feature . Besides the common
Mute feature , the APA4801 further integrates a volt-
age divider inside the chip . Thus , the external resis-
tors can be eliminated . The device has been prima-
rily developed for portable digital audio applications .
Applications
General Description
Block Diagram
Input B
Out B
BIAS
Mute
Out A
Input A
BIAS
0dB
+
A
B
+
1
2
3
4
V
SS
5
6
7
8
V
DD
130k
130k
0dB
MUTE
Portable Digital Audio
Personal Computers
Microphone Preamplifier
Copyright
ANPEC Electronics Corp.
Rev. A.5 - Apr., 2001
APA4801
www.anpec.com.tw
2
Absolute Maximum Ratings
Thermal Characteristics
Symbol
Parameter
Value
Unit
R
THJA
Thermal Resistance from Junction to Ambient in Free Air
DIP-8
SO-8
109
210
K/W
K/W
Note: 1. Human body model : C=100pF, R=1500
, 3 positive pulses plus 3 negative pulses
Electrical Characteristics
V
IN
=0dBV, V
DD
=5V, T
A
=25
C, f=1kHz (unless otherwise noted)
Symbol
Parameter
Rating
Unit
V
DD
Supply Voltage
8
V
t
SC(O)
Output Short-circuit Duration, at T
A
=25
C, P
tot
=1W
20
S
T
A
Operating Ambient Temperature range
-40 to 85
C
T
J
Maximum Junction Temperature
150
C
T
STG
Storage Temperature Range
-65 to +150
C
T
S
Soldering Temperature,10 seconds
260
C
V
ESD
Electrostatic Discharge
-3000 to 3000
*1
V
Function Pin Description
Pin Name
I/O
Function Description
Out A
O
A channel output pin
Mute
I
Chip disable control input, high active and low for normal
operating
Input A
I
A channel input terminal
V
SS
Power ground pin
Input B
I
B channel input terminal
BIAS
I
Right channel bias input pin
OUT B
O
B channel output pin
V
DD
Power input pin
APA4801
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Power Supply Voltage
2.7
5.5
V
V
DD
=5V
I
DD
Supply Current
No Load
2.5
mA
V
I(OS)
Input Offset Voltage
5
50
mV
Copyright
ANPEC Electronics Corp.
Rev. A.5 - Apr., 2001
APA4801
www.anpec.com.tw
3
Electrical Characteristics Cont.
APA4801
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
SD
Shunt Current
200
A
Mutel Mute Input Voltage
0.8
V
A
V1
- A
V2
Differential Channel
Voltage Gain
-0.5
0
0.5
dB
ATT
Mute Attenuation
f
IN
=1k, V
IN
=1 Vrms
75
70
dB
AC Characteristics
(THD+N
)/S
Total Harmonic
Distortion plus Noise to
Signal Ratio
P
O
=160mW, R
L
=8
, f=1kHz
P
O
=100mW, R
L
=16
, f=1kHz
0.05
0.05
%
P
O
Output Power
(THD+N)/S=0.1%, f=1kHz,
BW <80kHz
mW
R
L
=8
170
R
L
=16
100
P
O
Output Power
(THD+N)/S=10%, f=1kHz,
BW <80kHz
mW
R
L
=8
280
R
L
=16
160
PSRR Power Supply
Rejection Ratio
C
B
=4.7
F,V
RIPPLE
=200mVrms,
f=120Hz
76
dB
S/N
Signal to Noise Ratio
R
L
=8
Vrms
V
DD
=3V
I
DD
Supply Current
No Load
2.2
mA
V
I(OS)
Input Offset Voltage
5
mV
I
SD
200
A
AC Characteristics
I
SD
Shunt Current
150
A
Mutel Mute Input Voltage
0.8
V
A
V1
- A
V2
Differential Channel
Voltage Gain
-0.5
0
0.5
dB
ATT
Mute Attenuation
f
IN
=1k ,V
IN
= 0.5Vrms
70
dB
(THD+
N)/S
Total Harmonic
Distortion plus Noise to
Signal Ratio
P
O
=50m W, R
L
=8
, f=1kHz
P
O
=25m W, R
L
=16
, f=1kHz
0.1
0.1
%
S/N
Signal to Noise Ratio
Vrms
P
O
Output Power
(THD+N)/S=0.1%, f=1kHz,
BW <80kHz
mW
R
L
=8
45
R
L
=16
25
P
O
Output Power
(THD+N)/S=10%, f=1kHz,
BW <80kHz
mW
R
L
=8
80
R
L
=16
45
PSRR Power Supply
Rejection Ratio
C
B
=4.7
F,V
RIPPLE
=200m Vrms,
f=120Hz
76
dB
Copyright
ANPEC Electronics Corp.
Rev. A.5 - Apr., 2001
APA4801
www.anpec.com.tw
4
Test and Application Circuit
+
BIAS
5
7
MUTE
6
8
V
DD
0dB
0dB
B
A
APA4801
220
F
1
F
1
F
100
F
220
F
4.7
F
1
F
100k
V
INA
V
DD
Out B
Input B
BIAS
V
INB
V
MUTE
H : Speaker Action
L : Mute on
Out A
Mute
V
SS
+
Input A
4
3
2
1
Typical Characteristics
THD+N vs Output Power
THD+N (%)
V
DD
=
5V
R
L
=16
f=20Hz
f=20kHz
f=1kHz
Output Power (W)
0.01
10
0.1
1
10m
200m
100m
THD+N vs Output Power
0.01
10
0.1
1
10m
500m
Output Power (W)
200m
V
DD
=
5V
R
L
=8
f=20Hz
f=20kHz
f=1kHz
THD+N (%)
Copyright
ANPEC Electronics Corp.
Rev. A.5 - Apr., 2001
APA4801
www.anpec.com.tw
5
THD+N vs Frequency
THD+N (%)
Frequency (Hz)
20
20k
100
1k
10k
10
0.01
0.1
1
V
DD
=
5V
P
O
=160mW
R
L
=8
NO FILTERS
THD+N vs Frequency
Frequency (Hz)
10
0.01
0.1
1
20
20k
100
1k
10k
THD+N (%)
V
DD
=
5V
P
O
=100mW
R
L
=16
NO FILTERS
THD+N (%)
0.01
10
0.1
1
10m
100m
50m
f=20Hz
f=20kHz
f=1kHz
Output Power (W)
THD+N vs Output Power
V
DD
=
3V
R
L
=8
10m
100m
50m
THD+N (%)
0.01
10
0.1
1
Output Power (W)
THD+N vs Output Power
f=20Hz
f=20kHz
f=1kHz
V
DD
=
3V
R
L
=16
Typical Characteristics Cont.
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