參數(shù)資料
型號(hào): AK4527BVQ
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: HIGH PERFORMANCE MULTI-CHANNEL AUDIO CODEC
中文描述: 高性能多通道音頻解碼器
文件頁(yè)數(shù): 17/33頁(yè)
文件大?。?/td> 292K
代理商: AK4527BVQ
ASAHI KASEI
[AK4527B]
MS0056-E-00
2000/10
- 17 -
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Overflow Detection
The AK4527B has overflow detect function for analog input. Overflow detection is enabled when OVFE bit is set to “1”
at serial control mode. OVF pin goes to “H” if analog input of Lch or Rch overflows. OVF output for overflowed analog
input has the same group delay as ADC (GD=27.6/fs=626μs@fs=44.1kHz).
OVF is “L” for 522/fs(=11.8ms@fs=44.1kHz) after PDN = “
”, and then overflow detection is enabled.
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Zero detection
The AK4527B has two pins for zero detect flag outputs. Channel grouping can be selected by DZFM2-0 bits if P/S = “L”
and DZFE = “L” (table 8). DZF1 pin corresponds to the group 1 channels and DZF2 pin corresponds to the group 2
channels. However DZF2 pin becomes OVF pin if OVFE bit is set to “1”. Zero detection mode is set to mode 0 if DZFE=
“H” regardless of P/S pin. DZF1 is AND of all six channels and DZF2 is disabled (“L”) at mode 0. Table 9 shows the
relation of P/S, DZFE, OVFE and DZF.
When the input data of all channels in the group 1(group 2) are continuously zeros for 8192 LRCK cycles, DZF1(DZF2)
pin goes to “H”. DZF1(DZF2) pin immediately goes to “L” if input data of any channels in the group 1(group 2) is not
zero after going DZF1(DZF2) “H”.
DZFM
1
0
0
1
1
0
0
1
1
AOUT
L2
DZF1
DZF1
DZF1
DZF1
DZF2
DZF2
DZF2
Mode
2
0
0
0
0
1
1
1
1
0
0
1
0
1
0
1
0
1
L1
R1
R2
L3
R3
0
1
2
3
4
5
6
7
DZF1
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
DZF1
DZF1
DZF1
DZF1
DZF1
DZF2
DZF2
disable (DZF1=DZF2 = “L”)
DZF1
DZF1
DZF1
DZF2
DZF2
DZF2
DZF2
DZF1
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF1
DZF2
DZF2
DZF2
DZF2
DZF2
DZF2
Default
Table 8. Zero detect control
P/S pin
DZFE pin
“L”
“H”
“L”
OVFE bit
disable
disable
“0”
“1”
“0”
“1”
DZF mode
Mode 7
Mode 0
Selectable
Selectable
Mode 0
Mode 0
DZF1 pin
“L”
AND of 6ch
Selectable
Selectable
AND of 6ch
AND of 6ch
DZF2/OVF pin
“L”
“L”
Selectable
OVF output
“L”
OVF output
“H” (parallel mode)
“L” (serial mode)
“H”
Table 9. DZF1-2 pins outputs
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AK4528VFP-E2 功能描述:IC AUDIO CODEC 24BIT 28VSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率(位):18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比,標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動(dòng)態(tài)范圍,標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源,模擬:2.6 V ~ 3.3 V 電壓 - 電源,數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP(7x7) 包裝:帶卷 (TR)