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MS6308
MOSA ELECTRONICS
FEATURES
APPLICATIONS
Class AB stereo
headphone driver
• Wide temperature range
• No switch-ON/OFF clicks
• Excellent power supply ripple rejection
• Low power consumption
• Short-circuit resistant
• High performance :
- high SNR
- high slew rate
- low distortion
• Large output voltage swing
• CD-RW、DVD-RW
• CD-ROM、DVD-ROM
• Motherboard
• MP3、PDA
• Portable Digital Audio
DESCRIPTION
The MS6308 is an integrated class AB stereo headphone driver contained in an SO8 package. The device is
fabricated in a CMOS process and has been primarily developed for portable digital audio applications. MS6308 is pin
and function compatible with the Philips, TDA1308T.
PINNING
Symbol Pin Description
OUTA 1 output A
-INA 2 inverting input A
OUTA
1
8
V
DD
+INA 3 non-inverting input A
4 negative supply
V
SS
+INB 5 non-inverting input B
-INB 6 inverting input B
OUTB 7 output B
8 positive supply
V
DD
BLOCK DIAGRAM
OutA
-INA
+INA
1
2
3
V
4
SS
-INA
2
7
OUTB
MS6308
+INA
3
4
V
SS
Pin configuration
V
8
DD
OutB
-
+
7
-INB
6
-
+
5
+INB
6
5
-INB
+INB
Fig.1 Block Diagram
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MS6308
MOSA ELECTRONICS
ELECTRICAL CHARACTERISTICS
VDD = 5V; VSS = 0V; f = 1 kHz; RL = 32Ω ; Measured in test circuit of Fig.2
Symbol Parameter Conditions Min Typ Max Unit
VDDs single supply voltage 2.8 5.0 7.0 V
VDDd dual supply voltage 1.4 2.5 3.5 V
negative suppl y voltage -1.4 -2.5 -3.5 V
V
SS
supply current R
I
DD
Ptot total power dissipation RL not connected - 15 25 mW
V
Electrostatic Discharge
ESD
DC CHARACTERISTICS
Symbol Parameter Conditions Min Typ Max Unit
V
os input offset voltage - 10 - mV
I
I bias input bias current - 10 - pA
common mode voltage 0 - 3.5 V
V
CM
open-loop voltage gain R
G
V
maximum output current (THD+N)/S < 0.1% - 60 - mA
I
O
output resistance
R
O
output voltage swing
V
O
CS channel separation
load capacitance
C
L
AC CHARACTERISTICS
not connected - 3 5 mA
L
MIL-STD-883D
Method 3015.7
Ω
= 5 k
L
- 80 - dB
6000 - - V
- 0.25 -
note 1 0.75 - 4.25 V
RL = 16 Ω; note 1 1.5 - 3.5 V
RL = 5 k
Ω
; note 1 0.1 - 4.9 V
- 90 - dB PSRR power supply rejection ratio f = 100 Hz;
Vripple=100mV(p-p)
R
L
Ω
- 105 - dB
= 5 k
- 70 - dB
- - 200 pF
Class AB stereo
headphone driver
Ω
Symbol Parameter Conditions Min Typ Max Unit
(THD+N)/S total harmonic distortion
plus noise
note 2; R
= 5 k
L
Ω
- -70 -65 dB note 2
- 0.03 0.06
%
- -101 - dB
- 0.0009 -
%
S/N signal-to-noise ratio 100 110 - dB
unity gain frequency open-loop;R
f
G
Po maximum output power (THD+N)/S < 0.1
=5 k
L
Ω
- 5.5 - MHz
%
- 60 - mW
C i input capacitance - 3 - pF
SR slew rate unity gain inverting - 5 - V/µs
B po wer bandwidth unity gain inverting - 20 - kHz
Notes
1. Values are proportional to V
2. V
= 5.0 V; VO = 3.5 V(p-p) (0 dB).
DD
(THD+N) / S < 0.1 %.
DD
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MS6308
MOSA ELECTRONICS
APPLICATION INFORMATION
V
DD
3.9k
10uF
10uF
3.9k
V
REF
(typ. 2.5V)
3.9k
V
iA
V
iB
2
3
MS6308
5
6
8
1
7
4
100uF
100uF
Class AB stereo
headphone driver
V
OA
R
L
3.9k
100uF
V
OB
R
L
FFFFig.2 Measurement circuit, inverting application
ig.2 Measurement circuit, inverting application
ig.2 Measurement circuit, inverting applicationig.2 Measurement circuit, inverting application
Basic application example
A typical example of a CD-application with the MS6311 is shown in Fig.3. It features typical decoupling components
and a second-order analog post-filter (smoothing filter) stage providing a line output.
1
BCK
2
WS
3
DATA
45
GND
VoR
n.c.
VoL
V
8
7
6
DD
MS6311
Ω
10
V
DD
47uF 100nF
50k
50k
420pF
420pF
50k
50k
100nF
100nF
MS6308
MS6308
Headphone
(32Ω)
Headphone
(32Ω)
Fig.3 Example of a 2nd order filter application.
Note : No external capacitor loading is allowed at the output pins 6 and 8.
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MS6308
MOSA ELECTRONICS
MP3 digital to analog converting solution. Fig.4
Class AB stereo
headphone driver
MP3 DECODER
SUNPLUS
SPCA751
STMicroelectronics
STA013
DAC Headphone Driver
1
BCK
2
WS
3
DATA
45
GND
MS6313
Ω
3.3V
Power
On/Off
100k
50k
10
47uF 0.1uF
2.2k
Fig.4 A first order lowpass filter for DAC output.
EXTERNAL DIMENSIONS
3V
VoR
CAP
VoL
V
470pF
20k
0.1uF
0.1uF
V
REF
10uF
15k
15k
2
3
MS6308
5
6
22k
450pF
47uF
1.6V
1
47uF
7
P-P
PHONE JACK
Headphone
(32Ω)
1.2V
P-P
8
7
6
DD
AV
DD
10uF
50k
50k
(Unit : mm Tolerance : 0.1mm)
6.0 3.9
1.27
1.4 0.22 1.27 0.42 0.23
4.8
58
14
0.42
0.68
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MS6308
MOSA ELECTRONICS
TAPE AND REEL
(Unit : mm)
0.30
0.3R MAX
0.05
5.4
2.0
4.0
3.0
3.6
6.9
0.05
1.5+0.1/-0.0 DIA
8.0
Class AB stereo
headphone driver
1.75
5.5
0.5 Radius Typical1.5 MIN
0.05
12.0
0.3
1.7
2.0
ORDERING INFORMATION
Part
Number
MS6308 MS6308 SO8 Ink
SOP 8 : Plastic small outline package ; 8 leads.
Packaging
Marking
Package
Marking
Printing
Transport
Media
Tape and Reel
Tube
DESCRIPTION
MS 6308
Product Number
MOSA Abbreviation
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