AS3525-A/-B C22O22
Data Sheet, Confidential
7.4.6.6 Power Save Options
To save power, especially when driving 32 Ohm loads, a reduction of the bias current can be selected. Together with switching off the phantom
ground this gives 4 possible operating modes.
Table 111 Headphone Power-Save Options
HPCM_OFF IBR_HPH IDD_HPH (typ.)
Load
0
1
0
1
0
0
1
1
2.2mA
1.5mA
1.5mA
1.0mA
16 Ohm
16 Ohm
32 Ohm
32 Ohm
BVDD = 3.3V, TA= 25oC unless otherwise mentioned
7.4.6.7 Parameter
Table 112 Power Amplifier Block Characteristics
Symbol
RL
Parameter
Output Load
Notes
Min
Typ
Max Unit
Ohm
stereo mode
16
Pout
Maximum Output Power
20
40
mW
RL= 32Ω
RL= 16Ω
mW
A0
Gain
programmable gain
-43.43
60
1.07
20
dB
dB
dB
mA
uA
ms
dB
dB
Gain Step-Size
1.5
90
Ax
PSRR
Power Supply Rejection Ratio
Short Current Protection Level
IOUT power down
200Hz-20kHz, 720mVpp, RL= 16Ω
145
IOUT_pd
Tpower_up
SNR
-20
90
Signal to Noise Ratio
Mute Attenuation
90
120
BVDD = 3.3V, TA= 25oC unless otherwise mentioned
© 2005-2009, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com Revision 1.13
132 - 194
AMSCO [ AMS(艾迈斯) ]
