ak4560a AKM Semiconductor, Inc., ak4560a Datasheet - Page 30

• Manufacturer Part Number: ak4560a
• Description: 16bit Codec With Alc And Mic/hp/spk-amps
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n Shutter Signal Input
1. Recording
When ADMIX bit is “1”, input signal from SHT pin is attenuated to –4.5dB internally and is mixed to output signal from
ALC1 by a gain of 0dB. Input impedance of SHT pin is 42k (typ.).
When ADMIX bit is “0”, output signal of ALC1 is input to ADC by a gain of 0dB.
2. Playback
When BEEPS bit is “1”, input signal from SHT pin can be input to Speaker-Amp. This signal level can be adjusted by an
external resistor (R2). An internal resistor value (Rf) is 20k
level from Speaker-Amp becomes “20log
n BEEP Input
When BEEPH bit is “1”, input signal from BEEP pin can be input to Headphone-Amp. When BEEPS bit is “1”, input
signal from BEEP pin can be input to Speaker-Amp.
This signal level can be adjusted by an external resistor (R1). An internal resistor value (Rf) is 20k 30% . For example,
when R1 is 20k , the final output level from Headphone-Amp becomes
MS0028-E-00
“20log
10
(20k/20k) dB + 11.8dB (Headphone-Amp block) = +11.8dB”. (Refer to Figure 16)
BEEP
SHT
SHT pin
ALC1
Figure 16. Block Diagram of BEEP and SHT pin
10
Gain =-4.5dB
Figure 15. ADMIX Block Diagram
(20k/20k) dB + 5.6dB (Speaker-Amp) = +5.6dB”. (Refer to Figure 16)
R1
ADMIX bit
R2
- 30 -
Rf=20k
Gain=0dB
-
+
30% . For example, when R2 is 20k , the final output
-
+
to SPK or HP -Amp
to ADMIX
ADC
[AK4560A]
2000/05