HT82V736 (Holtek), amplifiers
[ Pobierz całość w formacie PDF ]
HT82V736
Stereo Headphone Driver with Mute
F
eatures
Operating voltage: 2.4V~6.0V
Low power consumption
Internal mute (mute on) function to prevent power
On/Off clicks
Short circuit elimination
Integrated voltage divider (V
DD
/2) to eliminate
external resistors
Excellent power supply ripple rejection
High slew rate
Wide temperature operating range
Low total harmonic distortion
8-pin SOP package
Applications
CD-ROM/RW, DVD-ROM/RW
PDA, MP3
Portable Digital Audio
Discman, Camcorders
Headphone Amplifier
General Description
The HT82V736 is a class AB stereo earphone driver de-
signed for portable digital audio application. It provides
an integrated mute function to prevent popping sounds
when power is turned on and off. In addition, the
HT82V736 further integrates a voltage divider, and
therefore the external resistors can be eliminated.
The HT82V736 has a fixed gain of 6dB so that external
gain setting is unnecessary. It is fully pin and functionally
compatible with BH3544 which is suitable for effective
low cost applications.
Block Diagram
Pin Assignment
Rev. 1.10
1
February 20, 2006
HT82V736
Pin Description
Pin No.
Pin Name
I/O
Description
1
OUT1
O
Channel 1 output pin
2
I
Mute control (Mute On: low; Mute Off: high)
MUTE
3
IN1
I
Audio input channel 1
4
Negative power supply, ground
VSS
5
IN2
I
Audio input channel 2
6
BIAS
I
V
DD
/2 connected a capacitor to ground to eliminate power On/Off clicks
7
O
Channel 2 output pin
OUT2
8
VDD
Positive power supply
Absolute Maximum Ratings
Supply Voltage ..........................V
SS
0.3V to V
SS
+7.0V
Storage Temperature ...........................
50
Cto125
C
Input Voltage .............................V
SS
0
.
3V to V
DD
+0.3V
Operating Temperature ..........................
40
Cto85
C
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maximum Ratings
may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Electrical Characteristics
V
IN
=0.5Vrms; Vss=0V; f=1kHz; Ta=25
C; R
L
=32
(unless otherwise specified)
Test Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD
Supply Voltage
2.4
6.0
V
I
Q
V
IN
=0Vrms
Quiescent Current
5V
2.5
4.0
mA
I
MUTE
Mute Current
5V
V
IN
=0Vrms
100
A
D.C. Characteristics
V
MUTE
Mute Pin Control Voltage
5V
0.3
0.7
1.6
V
A
V
Differential Channel Voltage Gain
5V
0.5
0
0.5
dB
A
V
Voltage Gain
5V
6
dB
PSRR
Power Supply Rejection Ratio
5V
f
RR
=100Hz; V
RR
=
20dBV
65
75
dB
P
O1
Rated Output Power 1
5V
R
L
=32
, THD<0.1%
60
65
mW
P
O2
Rated Output Power 2
5V
110
115
mW
R
L
=16
, THD<0.1%
A.C. Characteristics
Total Harmonic Channel
Distortion Factor
THD
5V
BW=20~20kHz
0.02
0.05
%
ATT
Mute Attenuation
5V
f=1kHz
80
90
dB
X
TALK
Channel Separation
5V
f=1kHz
55
70
dB
V
NO
Output Noise Voltage
5V
V
IN
=0Vrms, BW=20~20kHz
dBV
97
90
Rev. 1.10
2
February 20, 2006
HT82V736
Circuit Operation Timing
Note:
Mute on period: When the device is powered up or powered down, it is necessary to keep the Mute line low
to eliminate any popping sounds.
A
Mute off period: When the Mute line changes from low to high or high to low, because of R1 and C2, a short
charge and discharge time will be created.
Charge period: Larger values of C1 and C6 will create larger charge periods.
Play period: Normal play sound source
B
Typical Performance Characteristics
Fig.1 Total Harmonic Distortion vs. Output Power
Rev. 1.10
3
February 20, 2006
HT82V736
Fig.2 Total Harmonic Distortion vs. Output Power
Fig.3 Total Harmonic Distortion vs. Output Power
Rev. 1.10
4
February 20, 2006
HT82V736
Fig.4 Mute Attenuation vs. Frequency
Fig.5 Output Noise Voltage vs. Frequency
Rev. 1.10
5
February 20, 2006
[ Pobierz całość w formacie PDF ]
zanotowane.pl doc.pisz.pl pdf.pisz.pl chiara76.opx.pl
HT82V736
Stereo Headphone Driver with Mute
F
eatures
Operating voltage: 2.4V~6.0V
Low power consumption
Internal mute (mute on) function to prevent power
On/Off clicks
Short circuit elimination
Integrated voltage divider (V
DD
/2) to eliminate
external resistors
Excellent power supply ripple rejection
High slew rate
Wide temperature operating range
Low total harmonic distortion
8-pin SOP package
Applications
CD-ROM/RW, DVD-ROM/RW
PDA, MP3
Portable Digital Audio
Discman, Camcorders
Headphone Amplifier
General Description
The HT82V736 is a class AB stereo earphone driver de-
signed for portable digital audio application. It provides
an integrated mute function to prevent popping sounds
when power is turned on and off. In addition, the
HT82V736 further integrates a voltage divider, and
therefore the external resistors can be eliminated.
The HT82V736 has a fixed gain of 6dB so that external
gain setting is unnecessary. It is fully pin and functionally
compatible with BH3544 which is suitable for effective
low cost applications.
Block Diagram
Pin Assignment
Rev. 1.10
1
February 20, 2006
HT82V736
Pin Description
Pin No.
Pin Name
I/O
Description
1
OUT1
O
Channel 1 output pin
2
I
Mute control (Mute On: low; Mute Off: high)
MUTE
3
IN1
I
Audio input channel 1
4
Negative power supply, ground
VSS
5
IN2
I
Audio input channel 2
6
BIAS
I
V
DD
/2 connected a capacitor to ground to eliminate power On/Off clicks
7
O
Channel 2 output pin
OUT2
8
VDD
Positive power supply
Absolute Maximum Ratings
Supply Voltage ..........................V
SS
0.3V to V
SS
+7.0V
Storage Temperature ...........................
50
Cto125
C
Input Voltage .............................V
SS
0
.
3V to V
DD
+0.3V
Operating Temperature ..........................
40
Cto85
C
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maximum Ratings
may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Electrical Characteristics
V
IN
=0.5Vrms; Vss=0V; f=1kHz; Ta=25
C; R
L
=32
(unless otherwise specified)
Test Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD
Supply Voltage
2.4
6.0
V
I
Q
V
IN
=0Vrms
Quiescent Current
5V
2.5
4.0
mA
I
MUTE
Mute Current
5V
V
IN
=0Vrms
100
A
D.C. Characteristics
V
MUTE
Mute Pin Control Voltage
5V
0.3
0.7
1.6
V
A
V
Differential Channel Voltage Gain
5V
0.5
0
0.5
dB
A
V
Voltage Gain
5V
6
dB
PSRR
Power Supply Rejection Ratio
5V
f
RR
=100Hz; V
RR
=
20dBV
65
75
dB
P
O1
Rated Output Power 1
5V
R
L
=32
, THD<0.1%
60
65
mW
P
O2
Rated Output Power 2
5V
110
115
mW
R
L
=16
, THD<0.1%
A.C. Characteristics
Total Harmonic Channel
Distortion Factor
THD
5V
BW=20~20kHz
0.02
0.05
%
ATT
Mute Attenuation
5V
f=1kHz
80
90
dB
X
TALK
Channel Separation
5V
f=1kHz
55
70
dB
V
NO
Output Noise Voltage
5V
V
IN
=0Vrms, BW=20~20kHz
dBV
97
90
Rev. 1.10
2
February 20, 2006
HT82V736
Circuit Operation Timing
Note:
Mute on period: When the device is powered up or powered down, it is necessary to keep the Mute line low
to eliminate any popping sounds.
A
Mute off period: When the Mute line changes from low to high or high to low, because of R1 and C2, a short
charge and discharge time will be created.
Charge period: Larger values of C1 and C6 will create larger charge periods.
Play period: Normal play sound source
B
Typical Performance Characteristics
Fig.1 Total Harmonic Distortion vs. Output Power
Rev. 1.10
3
February 20, 2006
HT82V736
Fig.2 Total Harmonic Distortion vs. Output Power
Fig.3 Total Harmonic Distortion vs. Output Power
Rev. 1.10
4
February 20, 2006
HT82V736
Fig.4 Mute Attenuation vs. Frequency
Fig.5 Output Noise Voltage vs. Frequency
Rev. 1.10
5
February 20, 2006
[ Pobierz całość w formacie PDF ]