AK4695 Datasheet, PDF (66/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
■ Beep Input
When BEEPS bit is set to “1” during PMBP bit= “1”, the input signal from the BEEPIN pin is output to Speaker-Amp or
Line-Amp B. BPGN2-0 bits set the BEEP gain (Table 69) and the total gain is determined according to SPKG1-0 bits
setting (Table 76). When PMVCM bit = “1” and PMBP bit = “0”, the AK4695 is in power-save mode and the BEEPPIN
pin output becomes VCOM voltage. In this case, the input impedance is 50kΩ (typ). The rise-up time to the 99% VCOM
voltage is typ. 25ms@+2dB ~ 36ms@+16dB when input capacitance is 0.1μF.
BPGN2 bit
0
0
0
0
1
1
1
1
BPGN1 bit BPGN0 bit BEEP Gain
0
0
2dB
0
1
4dB
1
0
6dB
1
1
8dB
0
0
10dB
0
1
12dB
1
0
14dB
1
1
16dB
Table 69. BEEP Output Gain Setting
(default)
SPK-Amp Output (BTL)
SPKG1-0
bits
Total Gain
(BEEP Gain = 2dB)
Output Level
(BEEPIN Inptu=1.34Vpp,
AVDD=SVDD=2.8V)
00
7.6dB
3.21Vpp
(default)
01
9.6dB
4.05Vpp (Note 50)
10
11.6dB
5.09Vpp (Note 50)
11
16.6dB
9.06Vpp (Note 50)
Note 50. The output level is calculated on the assumption that the signal is not clipped. However, in the actual case, the
SPK-Amp output is clipped when a 1.34Vpp signal is input to the BEEPIN pin. The input signal level of the
BEEPIN pin should be lowered to avoid this clipping.
Table 70. BEEPIN pin → SPP/SPN pins Gain
BEEPIN pin
0.1μF
PMBP bit
50kΩ(typ)
Beep-Amp
BEEPS bit
50kΩ(typ)
VCOM
Power-save Mode
Figure 42. Block Diagram of BEEPIN pin
SPP/SPN pin
(LOUTB/ROUTB pin)
MS1463-E-01
- 66 -
2014/12