AS3515_08 datasheet(15/67 Pages) AMSCO

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AS3515 V15

austriamicrosystems

Data Sheet, Confidential

www.austriamicrosystems.com

Revision 3.1

- 66

6.3.5

Parameter

Table 12 Speaker Amplifier Parameter

Symbol Parameter

Notes

Min

Typ

Max

Unit

stereo mode

Ohm

Output Load

mono differential mode

Ohm

Pout

Maximum Output Power

RL= 8

Ω, mono differential mode

Gain

programmable nominal gain

-40.5

Gain Step-Size

1.5

Gain Step-Precision

0.5

PSRR

Power Supply Rejection Ratio 200Hz-20kHz, 720mVpp, no load

Short Current Protection Level

700

IOUT_pd

IOUT power down

BGND is forced high (>1V)

-20

Tpower_up

100

SNR

Signal to Noise Ratio

100

Mute Attenuation

100

BVDD = 5V, TA= 25oC unless otherwise mentioned

6.3.6

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

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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