AK5701VNP AKM Semiconductor Inc, AK5701VNP Datasheet - Page 37
AK5701VNP
Manufacturer Part Number
AK5701VNP
Description
IC ADC AUDIO STER 16BIT 24QFN
Manufacturer
AKM Semiconductor Inc
Type
ADCr
Datasheet
1.AK5701VNP.pdf
(64 pages)
Specifications of AK5701VNP
Resolution (bits)
16 b
Sampling Rate (per Second)
7.35k ~ 48k
Data Interface
I²S, Serial
Voltage Supply Source
Analog and Digital
Voltage - Supply
3V
Operating Temperature
-30°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-WFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
974-1039-2
AK5701VNP
AK5701VNP
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AK5701VNP-L
Manufacturer:
AKM Semiconductor Inc
Quantity:
1 874
Company:
Part Number:
AK5701VNP-L
Manufacturer:
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Quantity:
7 190
3. Example of ALC Operation
Table 28
The following registers should not be changed during the ALC operation. These bits should be changed after the ALC
operation is finished by ALC bit = “0” or PMADL=PMADR bits = “0”.
MS0404-E-02
Register Name
LMTH
ZELMN
ZTM1-0
WTM1-0
REF7-0
IVL7-0,
IVR7-0
LMAT1-0
RGAIN1-0
ALC
• LMTH, LMAT1-0, WTM1-0, ZTM1-0, RGAIN1-0, REF7-0, ZELMN
WR (LMAT1-0, RGAIN1-0, ZELMN, LMTH1-0; ALC= “1”)
shows the examples of the ALC setting for mic recording.
WR (ZTM1-0, WTM1-0)
Comment
Limiter detection Level
Limiter zero crossing detection
Zero crossing timeout period
Recovery waiting period
*WTM1-0 bits should be the same data
Maximum gain at recovery operation
Gain of IVOL
Limiter ATT step
Recovery GAIN step
ALC enable
as ZTM1-0 bits
Note : WR : Write
WR (IVL/R7-0)
ALC Operation
Manual Mode
WR (REF7-0)
Figure 39. Registers set-up sequence at ALC operation
Table 28. Example of the ALC setting
* The value of IVOL should be
the same or smaller than REF’s
- 37 -
Data
E1H
91H
01
00
00
00
00
0
1
fs=8kHz
Example:
−4.1dBFS
Operation
Enable
Enable
+30dB
1 step
1 step
16ms
16ms
0dB
Limiter = Zero crossing Enable
Recovery Cycle = 16ms@8kHz
Limiter and Recovery Step = 1
Maximum Gain = +30.0dB
Limiter Detection Level = −4.1dBFS
ALC bit = “1”
(3) Addr=1BH, Data=E1H
(1) Addr=18H&19H, Data=91H
(2) Addr=1AH, Data=00H
(4) Addr=1CH, Data=81H
Data
E1H
91H
01
10
10
00
00
0
1
fs=44.1kHz
−4.1dBFS
Operation
11.6ms
11.6ms
Enable
Enable
+30dB
1 step
1 step
0dB
[AK5701]
2007/08