參數(shù)資料
型號： MAX9856ETL+
廠商： Maxim Integrated Products
文件頁數(shù)： 20/46頁
文件大小： 0K
描述： IC CODEC AUDIO LP 40TQFN-EP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 50
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： 是
S/N 比，標準 ADC / DAC (db)： 77 / 91
動態(tài)范圍，標準 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： 管件
產(chǎn)品目錄頁面： 1392 (CN2011-ZH PDF)
MAX9856
Low-Power Audio CODEC with
DirectDrive Headphone Amplifiers
______________________________________________________________________________________
27
REGISTER
FUNCTION
ADC Noise Gate Threshold. The MAX9856 features a noise gate that reduces the audible noise at
low signal levels. The noise gate attenuates the output at a rate of 1dB for each 2dB the signal is
below the threshold. ANTH specifies the noise gate threshold level relative to the final ADC output
signal level.
The noise gate can be used in conjunction with AGC or on its own. When AGC is enabled, the noise
gate reduces the output level only when the AGC has set the gain to the maximum setting. Choose a
threshold between -28dB and -48dB when used in conjunction with the AGC. When the AGC is
enabled, the effective noise gate thresholds are increased by 20dB due to the microphone PGA
being set to maximum gain by the AGC.
ADC NOISE GATE THRESHOLD LEVELS
VALUE
THRESHOLD (dB)
0x0 to 0x5
Disabled
0x6
-64
0x7
-60
0x8
-56
0x9
-52
0xA
-48
0xB
-44
0xC
-40
0xD
-36
0xE
-32
ANTH
0xF
-28
ADC Interface Register Bit Description (continued)
Digital Filters
The MAX9856 digital audio interface includes digital
first-order highpass filters (Table 8) for both the DAC
input and the ADC output. The corner frequency for
each filter is selectable from 5Hz to 4kHz. The DAC fil-
ter (DACHP) can be used to reduce the low-frequency
energy sent to speakers incapable of reproducing low
frequencies. The ADC filter (ADCHP) can reduce low-
frequency noise such as wind noise from being con-
verted. The cutoff frequency depends on sample rate
and is shown in Table 9.
REG
B7
B6
B5
B4
B3
B2
B1
B0
0x0B
0
ADCHP
0
DACHP
Table 8. Digital Highpass Filters
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參數(shù)描述
MAX9856ETL/V+ 功能描述:接口—CODEC Low-Power Audio Codec With Directdrive. Headphone Amplifiers RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX9856ETL/V+T 功能描述:接口—CODEC Low-Power Audio Codec With Directdrive. Headphone Amplifiers RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX9856ETL+ 功能描述:接口—CODEC Stereo Audio CODEC w/DirectDrive Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX9856ETL+T 功能描述:接口—CODEC Stereo Audio CODEC w/DirectDrive Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX9856EVKIT+ 功能描述:音頻 IC 開發(fā)工具 Evaluation Kit for the MAX9856 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
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