CO4808
Dual 105mW Headphone Amplifier
Features
n
n
n
n
n
SOP surface mount packaging
Switch on/off click suppression
Excellent power supply ripple rejection
Unity-gain stable
Minimum external components
Description
The
CO4808
is a dual audio power amplifier capable of
delivering 105mW per channel of continuous average power
into a 16Ω 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.
Applications
n
Headphone Amplifier
n
Personal Computers
n
Portable electronic devices
Key Specifications
n
THD+N at 1kHz at 105mW continuous average output
power into 16Ω
0.1% (typ)
n
THD+N at 1kHz at 70mW continuous average output
power into 32Ω
0.1% (typ)
n
Output power at 0.1% THD+N at 1kHz into 32Ω 70mW
(typ)
Ordering Information
CO4808 X
Blank: Sop-8 & Tube
A: Sop-8 & Taping
* 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
Page 1 of 4
Rev 1.0 May 18,2004
Fax:886-3-3521052
CO4808
Dual 105mW Headphone Amplifier
Connection Diagrams
SOP Package
Top View
Typical Application
FIGURE 1. Typical Audio Amplifier Application Circuit
* 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
Page 2 of 4
Rev 1.0 May 18,2004
Fax:886-3-3521052
CO4808
Dual 105mW Headphone Amplifier
Electrical Character
Vdd=5V,Temp=25℃,Fin=1KHz,RL=32Ω,Vin=1.4V
Symbol
V
DD
I
DD
P
tot
V
OS
Ibias
V
CM
G
V
I
O
R
O
V
O
PSRR
Parameter
Supply Voltage
Supply Current
Total Power Dissipation
Input Offset Voltage
Input Bias Current
Common Mode Voltage
Open-Loop Voltage Gain R
L
=5KΩ
Max Output Current
Output Resistance
Output Swing
Power Supply Rejection
Ratio
Conditions
V
IN
=0V,I
O
=0A
V
IN
=0V,I
O
=0A
V
IN
=0V
Min
2.0
Typ
1.2
6
10
10
0
4.3
67
70
0.1
3
4.7
89
75
0.05
66
0.05
66
105
5.5
105
70
150
90
3
Max
5.5
3.0
16.5
50
Unit
V
mA
mW
mV
pA
V
dB
mA
Ω
V
dB
dB
%
dB
%
dB
dB
MHz
mW
THD+N<0.1%
R
L
=32Ω,0.1% THD+N, Min
R
L
=32Ω,0.1% THD+N, Max
Cb=1.0μF,
Vripple=100mVpp, f=100Hz
R
L
=32Ω
f=1kHz
R
L
=16Ω
Vo=3.5Vpp (at 0dB)
R
L
=32Ω
Vo=3.5Vpp (at 0dB)
Vo=3.5Vpp (at 0dB)
Open Loop, R
L
=5kΩ
THD+N=0.1%,f=1kHz
R
L
=16Ω
Crosstalk Channel Separation
THD+N
Total Harmonic
Distortion + Noise
SNR
f
G
Signal-to-Noise Ratio
Unity Gain Frequency
P
O
Output Power
R
L
=32Ω
THD+N=10%,f=1kHz
R
L
=16Ω
R
L
=32Ω
60
mW
mW
mW
pF
C
I
C
L
SR
Input Capacitance
Load Capacitance
Slew Rate
Unity Gain Inverting
200
3
pF
V/μs
* 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
Page 3 of 4
Rev 1.0 May 18,2004
Fax:886-3-3521052
CO4808
Dual 105mW Headphone Amplifier
Small Outline SOP-8
SYMBOL
A
B
C
D
E
F
H
J
K
M
L
e1
α
INCHES
MIN
MAX
0.188
0.197
0.149
0.158
0.228
0.244
0.050 BSC
0.013
0.020
0.004
0.010
0.053
0.069
0.011
0.019
0.007
0.010
0.016
0.050
0.150 REF
45
0
8
0
0
0
MILLIMETERS
MIN
MAX
4.80
5.00
3.80
4.00
5.80
6.20
1.27 BSC
0.33
0.51
0.10
0.25
1.35
1.75
0.28
0.48
0.19
0.25
0.40
1.27
3.81 REF
45
0
0
0
8
0
NOTES
-
-
-
-
-
-
-
-
-
-
-
* 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
Page 4 of 4
Rev
1.0 May 18,2004
Fax:886-3-3521052
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