
AS3515 V15
austriamicrosystems
Data Sheet, Confidential
www.austriamicrosystems.com
Revision 3.1
14
- 66
6.3.5
Parameter
Table 12 Speaker Amplifier Parameter
Symbol Parameter
Notes
Min
Typ
Max
Unit
stereo mode
4
Ohm
RL
Output Load
mono differential mode
8
Ohm
Pout
Maximum Output Power
RL= 8
Ω, mono differential mode
1
W
A0
Gain
programmable nominal gain
-40.5
6
dB
Ax
Gain Step-Size
1.5
dB
Gain Step-Precision
0.5
dB
PSRR
Power Supply Rejection Ratio 200Hz-20kHz, 720mVpp, no load
75
dB
Short Current Protection Level
700
mA
IOUT_pd
IOUT power down
BGND is forced high (>1V)
-20
20
uA
Tpower_up
100
ms
SNR
Signal to Noise Ratio
100
dB
Mute Attenuation
100
dB
BVDD = 5V, TA= 25oC unless otherwise mentioned
6.3.6
Register Description
To get an interrupt on an over-current event, the corresponding bit in the IRQ_ENRD1 register (0x25h) has to be set. Changing the bias
current or the output driver strength is done via AudioSet2 register (0x15h). All other speaker driver settings are controlled by the following
two registers.
Right Speaker Register (04h)
Table 13 LSP_OUT_R Register
Bit
Name
Description
7,6
SP_OVC_TO
speaker over current time out:
11: 0 ms
10: 512 ms
01: 128 ms
00: 256 ms
5
-
not used
4..0
SPR_VOL
volume settings for right speaker output, adjustable in 32 steps @ 1.5dB
11111: 6 dB gain
11110: 4.5 dB gain
..
00001: -39 dB gain
00000: -40.5 dB gain
The register is R/W; default value is 00h
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