YOUDA INTEGRATED CIRCUIT
YD34119A
LOW POWER AUDIO AMPLIFIER--YD34119A
DESCRIPTION
The YD34119A is a low power audio amplifier integrated circuit intended (primarily) for the telephone
applications,
such as in speakerphones.
FEATURES
*Wide operating supply voltage: Vcc=2~6V;
*Low quiescent supply current (Icc=2.7mA, typ.);
*Medium output power
Po=250mW at Vcc=6V, R
L
=32, THD=10%;
*Load impedance range (8to 100);
*Low distortion;
*Mute function (Icc=65A, typ.);
*Minimum number of external parts required.
BLOCK DIAGRAM
2
7
50k
4k
4k
50k
125k
+
_
+
_
1
3
4
5
6
8
BIAS
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel 86-755-83740369 Fax 86-755-83741418
Ver 5.0 1 of 4 2006-06-28
YOUDA INTEGRATED CIRCUIT
YD34119A
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
8.0 V
Peak Output Current
Iop
250 mA
Maximum Input/Output Voltage
Vi/Vout
-1.0~Vcc+1.0 V
Junction Temperature
Tj
-55+140
RECOMMENDED OPERATION CONDITIONS
(Tamb=25)
PARAMETER SYMBOL
MIN
TYP
MAX
UNIT
Supply
Voltage
Vcc 2.0 4.2 6.0 V
Load Impedance
R
L
8
32
100
Peak Load Current
Iop
100
200
mA
Differential Gain(5kHz Bandwidth)
Gv
0
30
46
dB
Voltage at Mute
Vi(mute)
0
Vcc
V
Ambient Temperature
Tamb
-20
+70
ELECTRICAL CHARACTERISTICS
(Tamb=25, Vcc=6V, Unless otherwise specified)
PARAMETER SYMBOL
TEST
CONDITIONS MIN
TYP
MAX
UNIT
Vcc=3.0V, Mute=0.8V, R
L
= 2.7
4.0
mA
Vcc=6.0, Mute=0.8V, R
L
=
3.3
5.0
mA
Operating Current
Iccq
Vcc=3.0V, Mute=2.0V, R
L
= 65
100
A
Vcc=3.0V, R
L
=16, Rf=75k, 1.0 1.15 1.25
Output DC Voltage
Vo
Vcc=6.0V, R
L
=16, Rf=75k, 2.65
V
Output Offset Voltage
Vo Vcc=3.0V,
Rf=75k, R
L
=32 -30 0 +30 mV
Output High Level
V
OH
2.0VVcc6V, Iout=-75mA
Vcc
-1.0
V
Output Low Level
V
OL
2.0VVcc6V, Iout=75mA
0.16
V
Input Bias Current
I
IB
-100
-200
nA
AC Input Resistance
Zi
@Vin
30 M
Ri Pin4
100
150
220
k
R
F
Pin2
18
25
40
k
Equivalent Resistance
R1 Pin1
50
175
k
V1
L
Low
0.8
V
Chip Disable
(Pin1)Input Voltage
V1
H
High
2.0
V
WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
YOUDA INTEGRATED CIRCUIT
YD34119A
PARAMETER SYMBOL
TEST
CONDITIONS MIN
TYP
MAX
UNIT
Open Loop Gain of
Amp 1
Gvo
80
dB
Close Loop Gain of
Amp 2
Gv Vcc=3.0V,f=1.0kHz,R
L
=32 -0.35 0 0.35 dB
Vcc=3.0V, R
L
=16, THD10% 55
Output Power
Po
Vcc=6.0V, R
L
=32, THD10% 250
mW
Vcc=6.0V, R
L
=32, Po=125mW
0.5
1.0
Total Harmonic
Distortion
THD
Vcc3.0V, R
L
=8, Po=20mW
0.5
%
Gain Bandwidth
BW
1.5
MHz
C1=,C2=0.01F 50
C1=0.1F,C2=0,f=1.0kHz
12
Power Supply
rejection
RR
(Vcc=4.5V,
=3.0V)
C1=1.0F,C2=0.01F,f=1.0kHz
52
dB
Muting G
MUT
Mute=2.0V, Vcc=3.0V,
1.0kHzf20kHz,
70 dB
APPLICATION CIRCUIT
125k
50k
4k
4k
BIAS
1
2
3.0k
+
10
+
10
+
4.7
7
4
3
6
5
8
1
2
75k
SPEAKER
AUDIO IN
Ci
Ri
Vin+
Vin-
FC
GND
CD
CD
Vo+
Vo-
Vcc
Rf
50k
Vcc
0.1
+
100
WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com
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