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參數(shù)資料
| 型號： | TA31275FN |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO24 |
| 封裝： | 0.300 INCH, 0.65 MM PITCH, PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 21/25頁 |
| 文件大?。?/td> | 561K |
| 代理商： | TA31275FN |
TA31275FN/ TA31275FNG
03-01-23
5
Functions
1.
Waveform Shaper Circuit (comparator)
The output data (pin 12) are inverted.
2.
RSSI Function
DC potential corresponding to the input level of IF IN (pin 6) is output to RSSI (pin 21). Output to RSSI
(pin 21) is converted to a voltage by the internal resistance. Thus, connecting external resistance R to pin
21 varies the gradient of the RSSI output as shown below. Note that due to the displacement of
temperature coefficients between external resistor R and the internal IC resistor IC resistor, the
temperature characteristic of the RSSI output may change. Also, the maximum RSSI value should be VCC
1 V or less, because AM doesn’t correct movement Filter AMP when voltage of RSSI high.
Figure 1
Figure 2
3.
VCC Pin and GND Pin
Use the same voltage supply for VCC Lo (2 pin) and VCC1 (5 pin) and VCC2 (11 pin) (or connect them).
Also, use the same voltage supply source for GND1 (17 pin) and GND2 (8 pin) (or connect them).
4.
Local Oscillator Circuit
The local oscillator circuit is external-input-only. The device incorporates no transistor for oscillation.
Input to pin 1 at a level from 95 to 105dB
V.
Adjust the values of constants C107 and C108 shown in the application circuit diagram so that the input
level will become approximately 100dB
V.
By switching the Lo switch (LOBS), the frequency set by the external circuit can be used as-is without
using the
×8 circuit.
Lo Switch (LOBS)
H
L
Local oscillation
status
×8 circuit in operation
×8 circuit halted/through pass
5.
RF Amp Current Adjustment
The RF amp current dissipation can be regulated by varying resistor R as shown in the figure below.
When R
= 1 k, the current dissipation is approximately 600 A.
Figure 3
14
R
RF DEC
IF input level
After R is
connected
30
k
21
R
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TA31275FN(EL) | 功能描述:射頻無線雜項 200MHz-450MHz Receiver RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| TA31275FNG | 功能描述:IC RF/IF DETECTOR 450MHZ 24-SSOP RoHS:是 類別:RF/IF 和 RFID >> RF 檢測器 系列:- 產(chǎn)品變化通告:Product Discontinuation 15/May/2006 標(biāo)準(zhǔn)包裝:3,000 系列:- 頻率:100MHz ~ 2GHz RF 型:手機，GSM，DCS，PCS 輸入范圍:- 精確度:- 電源電壓:2.7 V ~ 5.5 V 電流 - 電源:300µA 包裝:帶卷 (TR) 封裝/外殼:SC-74，SOT-457 其它名稱:NCS5000SNT1GOS |
| TA31275FNG(EL) | 功能描述:射頻無線雜項 200MHz-450MHz Receiver RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| TA31275FNG(O,EL) | 制造商:Toshiba America Electronic Components 功能描述:IC RECEIVER RFIC 450MHZ 24SSOP |
| TA-316-PT | 制造商:WELCON 功能描述: |
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