APA2057A
Electrical Characteristics (Cont.)
VDD = 5V, HVDD = 3.3V, GND = PGND = CPGND = 0V, TA= 25°C (unless otherwise noted).
APA2057A
Typ.
Symbol
Parameter
Test Condition
Unit
Min.
Max.
Headphone mode (Cont.)
With A-weighted Filter
S/N
PO = 70mW, RL =32W
VO =1.2Vrms, RL=10kW
95
92
dB
Noise Output
Voltage
mV
(rms)
Vn
Rf
30
40
CB =2.2mF
Input Feedback
Resistance
38
42
kW
Charge Pump
Fosc
Switching frequency
460
540
620
KHz
V
Charge Dump
Output Voltage
(CVSS)
-0.98
VDD
CVSS
Req
No load
Charge pump
requirement
resistance
9
12
W
Beep
Vbeep
Beep trigger level
3
4
VPP
ms
TRES
Beep response time
Attenuation
115
85
dB
dB
dB
dB
RL = 32W, VO = 1.1Vrms, Fin = 1KHz
RL = 10KW, VO = 1.1Vrms, Fin = 1KHz
HP disable
attenuation
Att(HP_EN)
112
112
RL = 8W, VO = 2Vrms, Fin = 1KHz
RL = 4W, VO = 2Vrms, Fin = 1KHz
RL = 10KW on the Headphone Mode,
VO = 1.1Vrms, Fin = 1KHz
AMP disable
attenuation
Att(AMP_EN)
Att_SD(HP_EN)
Att_SD(AMP_EN)
Shutdown active
Shutdown active
90
dB
dB
RL = 8W on the AMP Mode, VO = 1Vrms,
100
Fin = 1KHz
Headphone to Speaker Crosstalk
AMP_EN = 0V, RL = 8W
HP_EN = 5V, RL = 16W, Fin = 1KHz,
PO = 125mW
X’talk
Channel Separation
85
dB
Speaker to Headphone Crosstalk
HP_EN = 5V, RL = 10KW
X’talk
Channel Separation
80
dB
AMP_EN = 0V, RL = 4W, Fin = 1KHz,
PO = 1.5W
Amplifier Start up Time
Tstart-up
Start up time
120
msec
Copyright ã ANPEC Electronics Corp.
5
www.anpec.com.tw
Rev. A.1 - Aug., 2007
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
