APA4801
Stereo 280mW 8Ω Speaker Driver with Mute
Features
•Operating Voltage
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Single Supply |
3V to 7V |
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Dual Supply |
± 1.5V to ± 3.5V |
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High Signal-to-Noise Ratio |
100dB |
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High Slew Rate |
5V/ µ s |
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Low Distortion |
-65dB |
•Output Power at 10% THD+N
into 8Ω |
280mW |
into 16Ω |
160mW |
•Large Output Voltage Swing
•Excellent Power Supply Ripple Rejection
•Flexible Mute Function
•Integrated Voltage Divider (VDD/2) to Eliminate External Resistors
•Low Power Consumption
•Short-circuit Elimination
•Wide Temperature Range
•No Switch ON/OFF Clicks
•Available in 8 pin SOP or DIP Package
Ordering Information
Applications
•Portable Digital Audio
•Personal Computers
•Microphone Preamplifier
General Description
The APA4801 is an integrated class AB stereo headphone amplifier contained in an SO-8 or a DIP-8 plastic package with Mute feature . Besides the common Mute feature , the APA4801 further integrates a voltage divider inside the chip . Thus , the external resistors can be eliminated . The device has been primarily developed for portable digital audio applications .
Block Diagram
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MUTE |
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Out A 1 |
0dB |
0dB |
8 |
VDD |
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Mute 2 |
A |
B |
7 |
Out B |
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Input A |
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130kΩ |
130kΩ |
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BIAS |
3 |
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BIAS |
6 |
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VSS 4 |
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Input B |
APA4801 |
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Package Code |
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Handling Code |
J : PDIP-8 |
K : SOP-8 |
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Temp. Range |
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Temp. Range |
I : - 40 to 85 ° C |
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Handling Code |
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Package Code |
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TU : Tube |
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TR : Tape & Reel |
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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. A.5 - Apr., 2001
APA4801
Function Pin Description
Pin Name |
I/O |
Function Description |
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Out A |
O |
A channel output pin |
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Mute |
I |
Chip disable control input, high active and low for normal |
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operating |
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Input A |
I |
A channel input terminal |
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VSS |
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Power ground pin |
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Input B |
I |
B channel input terminal |
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BIAS |
I |
Right channel bias input pin |
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OUT B |
O |
B channel output pin |
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VDD |
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Power input pin |
Absolute Maximum Ratings
Symbol |
Parameter |
Rating |
Unit |
VDD |
Supply Voltage |
8 |
V |
tSC(O) |
Output Short-circuit Duration, at TA=25° C, Ptot=1W |
20 |
S |
TA |
Operating Ambient Temperature range |
-40 to 85 |
° C |
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TJ |
Maximum Junction Temperature |
150 |
° C |
TSTG |
Storage Temperature Range |
-65 to +150 |
° C |
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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 |
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 VIN=0dBV, VDD=5V, TA=25° C, f=1kHz (unless otherwise noted)
Symbol |
Parameter |
Test Conditions |
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APA4801 |
Unit |
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Min. |
Typ. |
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Max. |
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VDD |
Power Supply Voltage |
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2.7 |
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5.5 |
V |
VDD=5V |
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IDD |
Supply Current |
No Load |
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2.5 |
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mA |
VI(OS) |
Input Offset Voltage |
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5 |
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50 |
mV |
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Copyright ANPEC Electronics Corp. |
2 |
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www.anpec.com.tw |
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Rev. A.5 - Apr., 2001 |
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APA4801
Electrical Characteristics Cont.
Symbol |
Parameter |
Test Conditions |
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APA4801 |
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Unit |
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Min. |
Typ. |
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Max. |
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ISD |
Shunt Current |
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200 |
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µ A |
Mutel |
Mute Input Voltage |
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0.8 |
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V |
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AV1- AV2 |
Differential Channel |
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-0.5 |
0 |
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0.5 |
dB |
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Voltage Gain |
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ATT |
Mute Attenuation |
fIN=1k, VIN =1 Vrms |
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75 |
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70 |
dB |
AC Characteristics |
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(THD+N |
Total Harmonic |
PO =160mW, RL=8Ω , f=1kHz |
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0.05 |
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Distortion plus Noise to |
PO =100mW, RL=16Ω , f=1kHz |
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0.05 |
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Signal Ratio |
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PO |
Output Power |
(THD+N)/S=0.1%, f=1kHz, |
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mW |
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BW<80kHz |
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RL=8Ω |
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170 |
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RL=16Ω |
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100 |
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PO |
Output Power |
(THD+N)/S=10%, f=1kHz, |
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mW |
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BW<80kHz |
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RL=8Ω |
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280 |
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RL=16Ω |
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160 |
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PSRR |
Power Supply |
CB=4.7 µ F,VRIPPLE=200mVrms, |
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76 |
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dB |
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Rejection Ratio |
f=120Hz |
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S/N |
Signal to Noise Ratio |
RL=8Ω |
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µ |
Vrms |
VDD=3V |
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IDD |
Supply Current |
No Load |
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2.2 |
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mA |
VI(OS) |
Input Offset Voltage |
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5 |
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mV |
ISD |
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200 |
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µ A |
AC Characteristics |
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ISD |
Shunt Current |
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150 |
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µ A |
Mutel |
Mute Input Voltage |
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0.8 |
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V |
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AV1- AV2 |
Differential Channel |
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-0.5 |
0 |
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0.5 |
dB |
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Voltage Gain |
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ATT |
Mute Attenuation |
fIN=1k ,VIN = 0.5Vrms |
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70 |
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dB |
(THD+ |
Total Harmonic |
PO =50mW, RL=8Ω , f=1kHz |
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0.1 |
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N)/S |
Distortion plus Noise to |
PO =25mW, RL=16Ω , f=1kHz |
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0.1 |
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Signal Ratio |
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S/N |
Signal to Noise Ratio |
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µ Vrms |
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PO |
Output Power |
(THD+N)/S=0.1%, f=1kHz, |
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mW |
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BW<80kHz |
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RL=8Ω |
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45 |
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RL=16Ω |
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25 |
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PO |
Output Power |
(THD+N)/S=10%, f=1kHz, |
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mW |
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BW<80kHz |
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RL=8Ω |
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80 |
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RL=16Ω |
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45 |
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PSRR |
Power Supply |
CB=4.7µ F,VRIPPLE=200mVrms, |
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76 |
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dB |
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Rejection Ratio |
f=120Hz |
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Copyright ANPEC Electronics Corp. |
3 |
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www.anpec.com.tw |
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Rev. A.5 - Apr., 2001 |
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APA4801
Test and Application Circuit
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1µ F |
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220µ F |
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VINB |
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4.7µ F |
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Input B |
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BIAS |
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Out B |
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VDD |
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VDD |
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100µ F |
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BIAS |
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+ |
B |
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0dB |
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APA4801 |
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+ A |
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0dB |
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MUTE |
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VSS |
Input A |
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Mute |
Out A |
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220µ F |
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1µ F |
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VINA |
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100kΩ |
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VMUTE |
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1µ F |
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H : Speaker Action |
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L : Mute on |
Typical Characteristics
THD+N vs Output Power
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10 |
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VDD= 5V |
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RL=8Ω |
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(%) |
1 |
f=20Hz |
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THD+N |
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f=20kHz |
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0.1 |
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f=1kHz |
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0.01 |
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10m |
200m |
500m |
Output Power (W)
THD+N vs Output Power
10 |
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VDD= 5V |
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RL=16Ω |
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1 |
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(%) |
f=20Hz |
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THD+N |
f=20kHz |
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0.1 |
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f=1kHz |
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0.01 |
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10m |
100m |
200m |
Output Power (W)
Copyright ANPEC Electronics Corp. |
4 |
www.anpec.com.tw |
Rev. A.5 - Apr., 2001 |
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APA4801
Typical Characteristics Cont.
THD+N vs Frequency
10 |
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VDD |
= 5V |
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PO=160mW |
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RL=8Ω |
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NO FILTERS |
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1 |
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THD+N (%) |
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0.1 |
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0.01 |
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20 |
100 |
1k |
10k |
20k |
Frequency (Hz)
THD+N vs Output Power
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10 |
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VDD |
= 3V |
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RL=8Ω |
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1 |
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(%) |
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f=20kHz |
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THD+N |
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f=20Hz |
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0.1 |
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f=1kHz |
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0.01 10m |
50m |
100m |
Output Power (W)
THD+N vs Frequency
10 |
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VDD |
= 5V |
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PO=100mW |
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RL=16Ω |
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NO FILTERS |
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1 |
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THD+N (%) |
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0.1 |
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0.01 |
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20 |
100 |
1k |
10k |
20k |
Frequency (Hz)
THD+N vs Output Power
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10 |
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VDD= 3V |
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RL=16Ω |
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f=20kHz |
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1 |
f=20Hz |
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(%) |
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THD+N |
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f=1kHz |
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0.1 |
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0.0110m |
50m |
100m |
Output Power (W)
Copyright ANPEC Electronics Corp. |
5 |
www.anpec.com.tw |
Rev. A.5 - Apr., 2001 |
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