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參數資料
型號: TPS65920BZCH
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數: 76/115頁
文件大小: 1232K
代理商: TPS65920BZCH
Device
ONBOARD
MICBIAS.GND
MIC.MAIN.P
MICBIAS1.OUT
RMM.BP
CMM.B
MIC.MAIN.M
47pF
Closeto
Device
Closeto
Device
037-006
CMM.P
CMM.PM
CMM.M
R
/2
MM.GM
CMM.GM
CMM.GP
R
/2
MM.GM
SWCS037G
– MAY 2008 – REVISED APRIL 2011
Figure 6-7. Analog Microphone Differential
NOTE
For other component values, see Table 14-1.
NOTE
To improve the rejection, ensure that MICBIAS_GND is as clean as possible. This ground
must be shared with AGND of the TPS65920 or TPS65930 device and must not share with
AVSS4, which is the ground used by RX class AB output stages.
In differential mode, adding a low-pass filter (made by RSB and CB) is highly recommended if
coupling between RX output stages and the microphone is too high (and not enough
attenuation by the echo cancellation algorithm). The coupling can come from:
The internal TPS65920/TPS65930 coupling between MICBIAS.OUT voltage and RX
output stages
Coupling noise between MICBIAS.GND and AVSS4
In pseudodifferential mode, the dynamic resistance of the microphone improves the rejection
versus MICBIAS.OUT:
PSRR = 20*log((RB + RDyn_mic)/RB).
6.2.1.2
Silicon Microphone Module Characteristics
Based on silicon micro-electrical-mechanical system (MEMS) technology, the new microphone achieves
the same acoustic and electrical properties as conventional microphones, but is more rugged and exhibits
higher heat resistance. These properties offer designers of a wide range of products greater flexibility and
new opportunities to integrate microphones.
Copyright
2008–2011, Texas Instruments Incorporated
Audio/Voice Module (TPS65930 Device Only)
63
focus.ti.com: TPS65930/TPS65920
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相關代理商/技術參數
參數描述
TPS65920BZCH 制造商:Texas Instruments 功能描述:Power Supply IC
TPS65920BZCHR 功能描述:開關變換器、穩壓器與控制器 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS65921B1ZQZ 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65921B1ZQZR 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65921BZQZ 功能描述:PMIC 解決方案 Int Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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