CO4808
Dual 105mW Headphone Amplifier
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page 1 of 4
Rev 1.0 May 18,2004
CO4808 X
Blank: Sop-8 & Tube
A: Sop-8 & Taping
Key Specifications
n
THD+N at 1kHz at 105mW continuous average output
power into 16
0.1% (typ)
n
THD+N at 1kHz at 70mW continuous average output
power into 32
0.1% (typ)
n
Output power at 0.1% THD+N at 1kHz into 32
70mW
(typ)
Features
n
SOP surface mount packaging
n
Switch on/off click suppression
n
Excellent power supply ripple rejection
n
Unity-gain stable
n
Minimum external components
Applications
n
Headphone Amplifier
n
Personal Computers
n
Portable electronic devices
Description
The
CO4808 is a dual audio power amplifier capable of
delivering 105mW per channel of continuous average power
into a 16
load with 0.1% (THD+N) from a 5V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components using surface mount packaging. Since
the
CO4808 does not require bootstrap capacitors or snub-
ber networks, it is optimally suited for low-power portable
systems.
The unity-gain stable
CO4808 can be configured by external
gain-setting resistors.
Ordering Information
CO4808
Dual 105mW Headphone Amplifier
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page 2 of 4
Rev 1.0 May 18,2004
Connection Diagrams
SOP Package
Top View
FIGURE 1. Typical Audio Amplifier Application Circuit
Typical Application
CO4808
Dual 105mW Headphone Amplifier
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page 3 of 4
Rev 1.0 May 18,2004
Electrical Character
Vdd=5V,Temp=25
,Fin=1KHz,RL=32
,Vin=1.4V
Symbol Parameter Conditions Min Typ
Max Unit
V
DD
Supply
Voltage 2.0 5.5 V
I
DD
Supply
Current V
IN
=0V,I
O
=0A
1.2
3.0
mA
P
tot
Total Power Dissipation V
IN
=0V,I
O
=0A
6
16.5 mW
V
OS
Input
Offset
Voltage V
IN
=0V
10
50
mV
Ibias Input Bias Current 10 pA
0
V
CM
Common Mode Voltage
4.3
V
G
V
Open-Loop Voltage Gain R
L
=5K
67 dB
I
O
Max Output Current THD+N<0.1% 70 mA
R
O
Output
Resistance
0.1
R
L
=32
,0.1% THD+N, Min 3
V
O
Output
Swing
R
L
=32
,0.1% THD+N, Max
4.7
V
PSRR
Power Supply Rejection
Ratio
Cb=1.0
F,
Vripple=100mVpp, f=100Hz
89 dB
Crosstalk Channel Separation R
L
=32
75 dB
f=1kHz
0.05 %
R
L
=16
Vo=3.5Vpp (at 0dB) 66 dB
0.05 %
THD+N
Total Harmonic
Distortion + Noise
R
L
=32
Vo=3.5Vpp (at 0dB)
66
dB
SNR Signal-to-Noise Ratio Vo=3.5Vpp (at 0dB) 105 dB
f
G
Unity Gain Frequency Open Loop, R
L
=5k
5.5 MHz
THD+N=0.1%,f=1kHz
R
L
=16
105 mW
R
L
=32
70 60 mW
THD+N=10%,f=1kHz
R
L
=16
150 mW
P
O
Output
Power
R
L
=32
90 mW
C
I
Input
Capacitance
3 pF
C
L
Load
Capacitance
200
pF
SR Slew Rate Unity Gain Inverting 3 V/
s
CO4808
Dual 105mW Headphone Amplifier
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: server@ceramate.com.tw
Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052
Page 4 of 4
Rev
1.0 May 18,2004
Small Outline SOP-8
INCHES
MILLIMETERS
SYMBOL
MIN
MAX
MIN
MAX
NOTES
A
0.188
0.197
4.80
5.00
-
B
0.149
0.158
3.80
4.00
-
C
0.228
0.244
5.80
6.20
-
D
0.050 BSC
1.27 BSC
-
E
0.013
0.020
0.33
0.51
-
F
0.004
0.010
0.10
0.25
-
H
0.053
0.069
1.35
1.75
-
J
0.011
0.019
0.28
0.48
K
0.007
0.010
0.19
0.25
-
M
0.016
0.050
0.40
1.27
L
0.150 REF
3.81 REF
-
e1
45
0
45
0
-
0
0
8
0
0
0
8
0
-
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