參數(shù)資料
型號: MAX9856ETL+T
廠商: Maxim Integrated Products
文件頁數(shù): 22/46頁
文件大?。?/td> 0K
描述: IC AUDIO CODEC 40TQFN-EP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
類型: 音頻編解碼器
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:
S/N 比,標(biāo)準(zhǔn) ADC / DAC (db): 77 / 91
動態(tài)范圍,標(biāo)準(zhǔn) ADC / DAC (db): 85 / 91
電壓 - 電源,模擬: 1.71 V ~ 3.6 V
電壓 - 電源,數(shù)字: 1.71 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 40-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 40-TQFN-EP(5x5)
包裝: 帶卷 (TR)
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
______________________________________________________________________________________
29
BITS
FUNCTION
AGCATK
AGC Attack Time. The attack time is the time it takes to reduce the gain after the input signal has
exceeded the threshold level. The gain attenuation during attack is exponential and the attack time is
defined as one-time constant rather than the time it takes to reach the final gain:
00—3ms
01—12ms
10—50ms (recommended)
11—200ms
AGCHLD
AGC Hold Time. Hold time is the delay before the AGC release begins. The hold time counter starts
whenever the signal drops below the AGC threshold and is reset by any signal that exceeds the
threshold:
00—AGC disabled
01—50ms
10—100ms (recommended)
11—400ms
AGCSRC
AGC and Noise Gate Signal Source. Selects the audio signal that the AGC and noise gate circuitry
monitors:
0—Left-channel ADC output
1—Left-channel + right channel ADC output (results in 3dB lower threshold for coherent signals)
AGC Threshold. Sets the signal level at which the AGC begins gain reduction. The signal is monitored
after the ADC output gain has been applied.
AGC THRESHOLD LEVELS
AGCSTH
LEVEL (dB)
0000
-3
0001
-4
0010
-5
0011
-6
0100
-7
0101
-8
0110
-9
0111
-10
1000
-11
1001
-12
1010
-13
1011
-14
1100
-15
1101
-16
1110
-17
AGCSTH
1111
-18
AGC Register Bit Description (continued)
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