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參數(shù)資料
| 型號： | TA32305FNG |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO30 |
| 封裝： | 0.300 INCH, 0.65 MM PITCH, LEAD FREE, PLASTIC, SSOP-30 |
| 文件頁數(shù)： | 23/26頁 |
| 文件大?。?/td> | 605K |
| 代理商： | TA32305FNG |
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TA32305FN/FNG
2003-12-04
6
Functions
1. Waveform Shaper Circuit (comparator)
The output data (pin 30) are inverted.
2. RSSI Function
DC potential corresponding to the input level of IF IN (pin 8) is output to RSSI (pin 23). Output to
RSSI (pin 23) 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 0.8 V or less.
Figure 1
Figure 2
3. S Curve Characteristics
Changing external capacitance C27 varies the gradient of the S curve characteristics as shown below.
In case of widening the detection range, heightening IF frequency or lowering demodulation output,
make the gradient of the S curve characteristics gentle less than typical (120pF).
When using this IC by about 2.2V (low supply), set the constant of C27 100pF or add attenuator to AF
OUT (24 pin).
Figure 3
4. VCC Pin and GND Pin
Use the same voltage supply for VCC1 (2 pin) and VCC2 (7 pin) and VCC3 (12 pin) (or connect them).
Also, use the same voltage supply source for GND1 (21 pin) and GND2 (9 pin) (or connect them).
5. 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 92 to 105dB
V.
Adjust the values of constants C shown in the application circuit diagram so that the input level will
become approximately 100dB
V.
6. U/L switch pin
It is possible to switch Mixer output frequency to upper local or lower local comparing RF input
frequency.
IF input level
After R is
connected
24
k
23
R
IF frequency
After C is
lessened
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TA32305FNG(EL) | 功能描述:射頻無線雜項(xiàng) 200MHz-450MHz Transceiver 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 |
| TA327401 | 制造商:WACHENDORFF 功能描述:RATE METER 4 DIGITS 24-230VA 制造商:WACHENDORFF 功能描述:RATE METER, 4 DIGITS, 24-230VAC/DC |
| TA32910Q | 制造商:DYNEX 制造商全稱:Dynex Semiconductor 功能描述:Asymmetric Thyristor |
| TA32912Q | 制造商:DYNEX 制造商全稱:Dynex Semiconductor 功能描述:Asymmetric Thyristor |
| TA32914Q | 制造商:DYNEX 制造商全稱:Dynex Semiconductor 功能描述:Asymmetric Thyristor |
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