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Datasheet: YD7000 (Weida Semiconductor, Inc.)

Power Amplifier For Headphone Stereos

 

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Weida Semiconductor, Inc.
YOUDA INTEGRATED CIRCUIT
YD7000
POWER AMPLIFIER
FOR HEADPHONE STEREOS--YD7000
DESCRIPTION
The YD7000 is a low power audio amplifier integrated circuit for headphone. It provides differential speaker
outputs to maximize output swing at low supply voltages.
FEATURES
*Low current consumption.
*16 load drive capability.
*Excellent reduced voltage characteristics.
*Excellent power supply ripple rejection.
*Minimum number of external pares required (no input capacitor, feedback capacitor required).
*Applicable to radio sets because of high voltage gain.
*Less harmonic interference in radio band.
*On-chip power switch function, muting function.
BLOCK DIAGRAM
MUTE
POWER
BIAS
Amp1
Amp2
10
9
8
7
6
5
4
3
2
1
CIRCUIT
SWITCH
MUTE
OUT1
GND
OUT2
Vcc
REF
IN2
PRE
IN1
POWER
SWITCH
GND
POWER
SWITCH
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-5205117 86-510-5205108 Fax: 86-510-5205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel 86-755-83740369 13823533350 Fax 86-755-83741418
Ver 3.1 1 of 4 2004-9-20
YOUDA INTEGRATED CIRCUIT
YD7000
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
4.5 V
Allowable Power Dissipation
P
D
300 mW
Operating Temperature
Topr
-20+75
Storage Temperature
Tstg
-40+125
RECOMMENDED OPERATING CONDITIONS
(Tamb=25)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
3.0 V
Operating Voltage Range
Vcc
1.64.0
V
Recommended Load Resistance
R
L
1632
ELECTRICAL CHARACTERISTICS
(Tamb=25, RL=16, Rg=600, See specified Test Circuit.)
PARAMETER
SYMBO
L
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Icco(1) Vcc=2.4V,
quiescent
5.4
10
mA
Icco(2)
Vcc=4.5V, pin10GND
1.1
2.0
mA
Quiescent Current
Icco(3)
Vcc=4.5V, pin1GND
1.0
A
Gv(1) Vcc=2.4V,
f=1kHz,
Vo=-10dBm 30 32 34 dB
Voltage Gain
Gv(2) Vcc=1.6V,
f=1kHz,
Vo=-20dBm 29 32 34 dB
Gv(1)
Vcc=2.4V, f=1kHz, Vo=-10dBm
1.0
dB
Voltage Gain
Difference
Gv(2)
Vcc=1.6V, f=1kHz, Vo=-20dBm
1.0
dB
Total Harmonic
Distortion
THD Vcc=2.0V,
f=1kHz,Po=1mW 0.5
1.5
%
Output Power
Po
Vcc=3.0V, f=1kHz, THD=10%
20
40
mW
Crosstalk CT
Vcc=2.4V, f=100Hz, Rg=1K
Vo=-10dB
40 50 dB
Ripple Rejection
SVRR
Vcc=1.6V, f=100Hz, Rg=1 K
V
R
=-20dBm, BPF=100Hz
45 60 dB
Output Noise Voltage
V
NO
Vcc=4.5V, Rg=1 K
BPF=20Hz20kHz
62
100
V
Power OFF Effect
V
O
(off)
Vcc=1.6V, f=100Hz, pin1GND,
V
IN
=-10dB
-80
dB

WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
YOUDA INTEGRATED CIRCUIT
YD7000

Muting Effect
V
O
(MT)
Vcc=1.6V, f=100Hz, pin10GND,
V
IN
=-10dB
-80
dB
Power ON
Current Sensitivity
I
1
(on)
Vcc=1.5V, V50.85V
0.05
1.0
A
Power OFF
Voltage Sensitivity
V
1
(off)
Vcc=1.5V, V50.1V
0.5 0.6 V
Muting OFF
Current Sensitivity
I
10
(off)
Vcc=1.5V,V50.85V
0.2
1.0
A
Muting ON
Voltage Sensitivity
V
10
(on)
Vcc=1.5V, V50.1V
0.5 0.65
V
APPLICATION CIRCUIT
2
8
7
1
6
5
3
22
4
9
10
+
0.1
47
4.7
4.7
0.1
220
220
RL 16
RL 16
MT/SW
P/SW
ON
OFF
ON
OFF
+
+
+
Vcc
Vin1
Vin2














WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com
YOUDA INTEGRATED CIRCUIT
YD7000

OUTLINE DRAWING





















WuXi YouDa Electronics Co., Ltd 4 of 4 Website: www.e-youda.com
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