APA3541/4
Class AB Stereo Headphone Driver with Mute
Features
•High Signal-to-Noise Ratio
•High Slew Rate
•Low Distortion
•Large Output Voltage Swing
•Flexible Mute Function
•Excellent Power Supply Ripple Rejection
•Low Power Consumption
•Short-circuit Elimination
•Wide Temperature Range
•No Switch ON/OFF Clicks
•Integrated Voltage Divider (VDD/2) to Eliminate External Resistors
Applications
•Portable Digital Audio
General Description
The APA3541/4 is an integrated class AB stereo headphone driver contained in an SO-8 or a DIP-8 plastic package with Mute feature . Besides the common Mute feature , the APA3541/4 further integrates a voltage divider inside the chip . Thus , the external resistors can be eliminated . The APA3541 has a fixed gain of 0dB and the APA3544 has a fixed gain of 6dB so that external gain setting is unnecessary. 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 3541/4 |
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P ackage C ode |
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J : P D IP - 8 |
K : S O P - 8 |
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H andling C ode |
Y : C hip F rom |
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T em p . R ange |
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T em p . R ange |
I : - 40 to 85 ° |
C |
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P ackage C ode |
H andling C ode |
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T U : Tube |
T R : T ape & R eel |
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A P A 3541/4 J : |
A P A 3541/4 |
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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 3541/4 K : |
A P A 3541/4 |
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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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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.1 - Apr., 2003 |
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APA3541/4
Block Diagram
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M UTE |
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Out A |
1 |
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8 |
V |
DD |
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0dB |
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0dB |
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(6dB) |
A |
(6dB) |
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Out B |
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Mute 2 |
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B |
7 |
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+ |
+ |
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Input A |
3 |
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BIAS |
6 |
BIAS |
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180kΩ |
180kΩ |
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( 90kΩ ) |
( 90kΩ ) |
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VSS |
4 |
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5 |
Input B |
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* The values in parenthessis are for the APA3544.
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, low active and high for normal operating |
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Input A |
I |
A channel input terminal |
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VSS |
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Power ground pin |
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 |
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VDD |
Supply Voltage |
7 |
V |
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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 |
300 |
° 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
Copyright ANPEC Electronics Corp. |
2 |
www.anpec.com.tw |
Rev. B.1 -Apr., 2003 |
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APA3541/4
Thermal Characteristics
Symbol |
Parameter |
Rating |
Unit |
RTHJA |
Thermal Resistance from Junction to Ambient in Free Air |
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DIP-8 |
108 |
K/W |
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SOP-8 |
210 |
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RTHJC |
Thermal Resistance from Junction to Case |
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DIP-8 |
45 |
K/W |
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SOP-8 |
40 |
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Electrical Characteristics
VIN=0dBV, VCC=5V, TA=25° C, f=1kHz, RL=32Ω |
(unless otherwise noted) |
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Symbol |
Parameter |
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Test Condition |
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APM3541/4 |
Unit |
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Min. |
Typ. |
Max. |
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VDD |
Supply Voltage |
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3.0 |
5.0 |
6.0 |
V |
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IQ |
Quiescent Current |
VIN= 0 Vrms |
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3.5 |
5 |
mA |
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Imute |
Mute Current |
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200 |
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µ A |
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VTM |
Mute Terminal Voltage |
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0.3 |
0.7 |
1.6 |
V |
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∆ GVCL |
Differential Channel |
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-0.5 |
0 |
0.5 |
dB |
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Voltage Gain |
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GVCL |
Voltage Gain |
Vin=1Vrms,f= 1kHz,RL=32Ω |
APA3541 |
-2 |
0 |
2 |
dB |
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Vin=0.5Vrms, f=1kHz,Rl=32Ω |
APA3544 |
4 |
6 |
8 |
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THD |
Total Harmonic Channel |
BW<80kHz |
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0.03 |
0.1 |
% |
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Distortion Factor |
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PU1 |
Rated Output Power1 |
RL=32Ω |
,THD+N=0.1%,BW<8 |
APA3541 |
50 |
55 |
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mW |
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0kHz |
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APA3544 |
75 |
80 |
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PU2 |
Rated Output Power2 |
RL=16Ω |
,THD+N=0.1%,BW<8 |
APA3541 |
105 |
110 |
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mW |
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0kHz |
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APA3544 |
140 |
145 |
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VNO |
Output Noise Voltage |
BW=20~20kHz , Vin=0Vrms |
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-93 |
-85 |
dBV |
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CS |
Channel Separation |
F=1kHz |
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APA3541 |
-90 |
-95 |
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dB |
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APA3544 |
-65 |
-70 |
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ATT |
Mute Attenuation |
VIN=1Vrms,f=1kHz,Mute=L |
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65 |
70 |
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dB |
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RR |
Ripple Rejection |
FRR=100Hz,VRR=-20dBV |
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50 |
60 |
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dB |
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Copyright |
ANPEC Electronics Corp. |
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3 |
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www.anpec.com.tw |
Rev. B.1 -Apr., 2003
APA3541/4
Test and Application Circuit
1µ F
VINB
1 0 µ |
F |
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Input B |
BIAS |
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Out B |
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5 |
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6 |
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7 |
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BIAS |
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B |
0dB(6dB) |
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+ |
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0dB(6dB) |
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+ |
A |
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M UTE |
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220µ F
VDD |
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VDD |
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8 |
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100µ F |
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APA3541 |
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(APA3544) |
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4 |
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3 |
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2 |
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1 |
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VSS |
Input A |
M ute |
Out A |
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220 |
µ F |
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1µ F |
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100k |
Ω |
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VINA |
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VMUTE |
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1µ F |
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H : Speaker Action |
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L : M ute on |
Copyright ANPEC Electronics Corp. |
4 |
www.anpec.com.tw |
Rev. B.1 -Apr., 2003 |
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