APA2308
Class AB Stereo Headphone Driver
Features |
Applications |
•Operating Voltage
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Single Supply |
3V to 6V |
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Dual Supply |
±1.5V to ± 3.0V |
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High Signal-to-Noise Ratio |
100dB |
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Low Distortion |
-65dB |
•Large Output Voltage Swing
•Excellent Power Supply Ripple Rejection
•Low Power Consumption
•Short-circuit Elimination
•Wide Temperature Range
•No Switch ON/OFF Clicks
•Available in 8 pin SOP ,DIP or TSSOP Package
•Portable Digital Audio
Gereral Description
The APA2308 is an integrated class AB stereo headphone driver contained in an SO-8, a DIP-8 or a TSSOP-8 plastic package. The APA2308 is capable of delivering 280mW of max. Output power to an 8Ω load or 110mW to a 32Ω load with less than 10% (THD+N) from a 5V power supply. The device is fabricated in a CMOS process and has been primarily developed for portable digital audio applications .
Ordering and Marking Information
A P A 2308
H andling C ode
T em p . R ange
P ackage C ode
P ackage C ode |
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J : P D IP - 8 |
K : S O P - 8 |
O : T S S O P - 8 |
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T em p . R ange |
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I : - 40 to 85 ° C |
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H andling C ode |
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T U : Tube |
T R : T ape & R eel |
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A P A 2308 |
J : |
A P A 2308 |
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X X X X X - D ate C ode |
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X X X X X |
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A P A 2308 |
K : |
A P A 2308 |
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X X X X X - D ate C ode |
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X X X X X |
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A P A 2308 O : |
A P A 2308 |
X X X X X - D ate C ode |
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ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp. |
1 |
www.anpec.com.tw |
Rev. B.3 - Jun., 2003 |
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APA2308
Block Diagram
Out A 1 |
8 |
V |
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DD |
Inverting Input A 2 |
7 |
Out B |
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- + |
+ - |
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Non-inverting Input A 3 |
6 |
Inverting Input B |
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V |
4 |
5 |
Non-inverting Input B |
SS |
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APA2308 |
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Absolute Maximum Ratings
Symbol |
Parameter |
Rating |
Unit |
VDD |
Supply Voltage |
7 |
V |
TSC(O) |
Output Short-circuit Duration,at TA=25°C,PTOT=1W |
20 |
S |
TA |
Operating Ambient Temperature range |
-40 to 85 |
°C |
TJ |
Maximum Junction Temperature |
150 |
°C |
TSTG |
Storage Temperature Range |
-65 to +150 |
°C |
TS |
Soldering Temperature , 10 seconds |
260 |
°C |
VESD |
Electrostatic Discharge |
-3000 to 3000*1 |
V |
Note : *1. Human body model : C=100pF , R=1500Ω , 3 positive pulses plus 3 negative pulses
Thermal Characteristics
Symbol |
Parameter |
Value |
Unit |
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RTHJA |
Thermal Resistance from Junction to Ambient in Free Air |
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DIP-8 |
109 |
K/W |
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SO-8 |
210 |
K/W |
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Electrical Characteristics
VDD=5V , VSS=0V , TA=25°C , fi=1kHz , RL=32Ω ( unless otherwise noted)
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Symbol |
Parameter |
Test Condition |
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APA2308 |
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Unit |
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Min. |
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Typ. |
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Max |
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Supply |
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VDD |
Supply Voltage |
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Single |
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3.0 |
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5.0 |
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6.0 |
V |
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Dual |
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±1.5 |
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±2.5 |
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±3.0 |
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VSS |
Negative Supply Voltage |
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-1.5 |
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-2.5 |
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-3.0 |
V |
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IDD |
Supply Current |
No Load |
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2.5 |
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5 |
MA |
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PTOT |
Total Power Dissipation |
No Load |
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12.5 |
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25 |
mW |
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Copyright ANPEC Electronics Corp. |
2 |
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www.anpec.com.tw |
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Rev. B.3 - Jun., 2003 |
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APA2308
Electrical Characteristics Cont.
VDD=5V, VSS=0V, TA=25°C, fi=1kHz, RL=32Ω ( unless otherwise noted)
Symbol |
Parameter |
Test Condition |
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APA2308 |
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Unit |
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Min. |
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Typ. |
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Max |
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DC Characteristics |
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VI(OS) |
Input Offset Voltage |
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5 |
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MV |
IBIAS |
Input Bias Current |
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10 |
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PA |
VCM |
Common Mode Voltage |
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0 |
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3.5 |
V |
GV |
Open-loop Voltage Gain |
RL=5kΩ |
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75 |
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dB |
IO |
Max. Output Current |
(THD+N)/S<0.1% |
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140 |
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MA |
RO |
Output Resistance |
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0.25 |
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Ω |
AC Characteristics |
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VO |
Output Voltage Swing |
RL=32Ω*1 |
0.25 |
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4.75 |
V |
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RL=16Ω*1 |
0.5 |
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4.5 |
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PSRR |
Power Supply Rejection Ratio |
Fi=100Hz |
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65 |
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dB |
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VRIPPLE(P-P) =100mV |
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\CS |
Channel Separation |
RL=32Ω |
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95 |
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dB |
CL |
Load Capacitance |
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200 |
pF |
(THD+N)/S |
Total Harmonic Distortion Plus |
RL=32Ω*2 |
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-65 |
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-60 |
dB |
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Noise to Signal Ratio |
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0.05 |
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0.1 |
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S/N |
Signal to Noise Ratio |
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90 |
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100 |
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dB |
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FG |
Unity Gain Frequency |
RL=5kΩ |
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5 |
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MHz |
PO |
Max. Output Power |
(THD+N)/S<0.1% |
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84 |
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mW |
CI |
Input Capacitance |
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3 |
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pF |
B |
Power Bandwidth |
Unity Gain Inverting |
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20 |
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kHz |
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Notes *1 : Values are proportional to VDD ; (THD+N)/S < 0.1% *2 : VDD=5.0V ; VO(P-P)=3.5V (at 0 dB)
Copyright ANPEC Electronics Corp. |
3 |
www.anpec.com.tw |
Rev. B.3 - Jun., 2003 |
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APA2308
Test And Application Circuits
VDD |
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220pF |
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220µF |
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15kΩ |
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VOUTA |
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1 |
8 |
RL |
2.2µF |
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2 |
- |
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VINA |
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15kΩ |
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+ |
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3 |
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APA2308 |
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VREF |
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100µF |
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typ.1/2VDD |
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5 |
- + |
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VINB |
15kΩ |
6 |
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2.2µF |
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7 |
4 |
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15kΩ |
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VOUTB |
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220µF |
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220pF |
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RL |
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Copyright ANPEC Electronics Corp. |
4 |
www.anpec.com.tw |
Rev. B.3 - Jun., 2003 |
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