
AS3515 V15
austriamicrosystems
Data Sheet, Confidential
www.austriamicrosystems.com
Revision 3.1
11
- 66
6.2.7
Parameter
Table 8
Power Amplifier Block Characteristics
Symbol Parameter
Notes
Min
Typ
Max
Unit
RL
Output Load
stereo mode
16
Ohm
RL= 32
Ω
20
mW
Pout
Maximum Output Power
RL= 16
Ω
40
mW
A0
Gain
programmable nominal gain
-43.43
1.07
dB
Ax
Gain Step-Size
1.5
dB
Gain Step-Precision
0.5
dB
PSRR
Power Supply Rejection Ratio 200Hz-20kHz, 720mVpp, RL= 16Ω
90
dB
Short Current Protection Level
145
mA
IOUT_pd
IOUT power down
HPGND is forced high (>1V)
-20
20
uA
Tpower_up
90
ms
SNR
Signal to Noise Ratio
100
dB
Mute Attenuation
100
dB
BVDD = 3.3V, TA= 25oC unless otherwise mentioned
6.2.8
Register Description
To get an interrupt on an over-current event, the corresponding bit in the IRQ_ENRD1 register (0x26h) has to be set. Also the interrupt
request for HP detection has to be set in this register. The power-save options are controlled via AudioSet3 register (0x16h). All other
headphone driver settings are controlled by the following two registers.
Right Headphone Register (02h)
Table 9
HPH_OUT_R Register
Bit
Name
Description
7,6
HP_OVC_TO
speaker over current time out:
11: 0 ms
10: 512 ms
01: 128 ms
00: 256 ms
5
-
4..0
HPR_VOL
volume settings for right headphone output, adjustable in 32 steps @ 1.5dB
11111: 1.07 dB gain
11110: -0.43 dB gain
..
00001: -43.93dB gain
00000: -45.43 dB gain
The register is R/W; default value is 00h
ams
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Technical
content
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valid