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參數(shù)資料
| 型號： | TSH512CFT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, ROHS COMPLIANT, TQFP-44 |
| 文件頁數(shù)： | 13/31頁 |
| 文件大?。?/td> | 1350K |
| 代理商： | TSH512CFT |
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General description
TSH512
20/31
Doc ID 8120 Rev 7
Figure 27.
Electret condenser microphone source
The capacitor C in series with the microphone stops the DC coming from MIC-BIAS.
The resistor R provides the DC from MIC-BIAS to supply the ECM.
Thanks to the automatic level control (ALC), the great variations of amplitude will not over-
modulate the transmitter (refer to the Section 5.4: ALC section: automatic level control).
The self-adaptive VOX (voice operated transmit) offers automatic transmitting with a good
discrimination of the background noise (see Section 5.5: VOX description: voice operated
5.3
MIC-BIAS section: microphone bias voltage
The MIC-BIAS bias voltages are dedicated to the bias of electret condenser microphones.
These bias voltages on pin 10 for TX1 and pin 2 for TX2 exhibit a low voltage noise density
of 22 nV/
√Hz). This allows more than 55 dB S/N considering a bandwidth of 7 kHz
(Figure 27).
The MIC-BIAS voltage is related to VCC as follows (with I MIC-BIAS= 2.5 mA):
VMIC-BIAS = 0.844.Vcc-0.140 (volts)
Moreover, the supply rejection ratio is guaranteed to be better than 50 dB without any
decoupling capacitor. To address biasing of most of the microphones, the current drive
capability is 2.5 mA. The MIC-BIAS voltage depends linearly on the supply voltage VCC
(refer to Figure 11 on page 11).
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| TSH512CYFT | 功能描述:IC IR TRANSMITTER HIFI 44LQFP RoHS:是 類別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應(yīng)用:- 調(diào)制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| TSH60 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Wide-Band, Low-Power Operational Amplifiers with Standby |
| TSH60C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Wide-Band, Low-Power Operational Amplifiers with Standby |
| TSH60CD | 功能描述:運算放大器 - 運放 Lo Pwr Oper Amp Wide Band RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TSH60CDT | 功能描述:運算放大器 - 運放 Wide band low power operational RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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