APA2057A
Electrical Characteristics (Cont.)
V
DD
= 5V, HV
DD
= 3.3V, GND = PGND = CPGND = 0V, T
A
= 25°C (unless otherwise noted).
Symbol
Headphone mode (Cont.)
With A-weighted Filter
S/N
P
O
= 70mW, R
L
=32Ω
V
O
=1.2Vrms, R
L
=10kΩ
Vn
Rf
Charge Pump
Fosc
CV
SS
Switching frequency
Charge Dump
Output Voltage
(CVSS)
Charge pump
requirement
resistance
No load
460
540
-0.98
V
DD
9
12
620
KHz
V
Noise Output
Voltage
Input Feedback
Resistance
C
B
=2.2µF
38
95
92
30
40
42
µV
(rms)
kΩ
dB
Parameter
Test Condition
APA2057A
Min.
Typ.
Max.
Unit
Req
Beep
Vbeep
T
RES
Attenuation
Att(HP_EN)
Ω
Beep trigger level
Beep response time
3
4
V
PP
ms
HP disable
attenuation
AMP disable
attenuation
Shutdown active
R
L
= 32Ω, V
O
= 1.1Vrms, F
in
= 1KHz
R
L
= 10KΩ, V
O
= 1.1Vrms, F
in
= 1KHz
R
L
= 8Ω, V
O
= 2Vrms, F
in
= 1KHz
R
L
= 4Ω, V
O
= 2Vrms, F
in
= 1KHz
R
L
= 10KΩ on the Headphone Mode,
V
O
= 1.1Vrms, F
in
= 1KHz
R
L
= 8Ω on the AMP Mode, V
O
= 1Vrms,
F
in
= 1KHz
115
85
112
112
90
dB
dB
dB
dB
dB
Att(AMP_EN)
Att_SD(HP_EN)
Att_SD(AMP_EN)
Shutdown active
100
dB
Headphone to Speaker Crosstalk
AMP_EN = 0V, R
L
= 8Ω
X’
talk
Channel Separation
HP_EN = 5V, R
L
= 16Ω, F
in
= 1KHz,
P
O
= 125mW
Speaker to Headphone Crosstalk
HP_EN = 5V, R
L
= 10KΩ
X’
talk
Channel Separation
AMP_EN = 0V, R
L
= 4Ω, F
in
= 1KHz,
P
O
= 1.5W
Amplifier Start up Time
T
start-up
Start up time
120
msec
80
dB
85
dB
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Aug., 2007
5
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
