- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98150 > T4258NFNG3 (ATMEL CORP) AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO44 PDF資料下載
參數(shù)資料
| 型號： | T4258NFNG3 |
| 廠商： | ATMEL CORP |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO44 |
| 封裝： | SSOP-44 |
| 文件頁數(shù)： | 36/38頁 |
| 文件大小： | 443K |
| 代理商： | T4258NFNG3 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁當前第36頁第37頁第38頁
7
T4258N
4566B–AUDR–02/04
Note:
The U4256 FMOSCIN (pin 19) input frequency is limited to 160 MHz.
FM RF-AGC
The FM RF-AGC circuit includes a wide-band level detector at the input pin 1 of the FM
mixer and an in-band level detector at the output of the FM IF amplifier (pin 30). The out-
puts of these level detectors are used to control the current into the pin diode (see
Figure 3) in order to limit the signal level at the FM mixer input and the following stages.
The maximum pin diode current is determined by R115 and the time constant of the
AGC control loop can be adjusted by changing the value of C111.
The AGC threshold level at the input of the FM mixer can be adjusted by bit 64 and
bit 65 according to Table 6. The in-band AGC threshold refers to the FM mixer input
(pin 1, pin 2) depends on the gain of the FM IF amplifier and can be adjusted by bit 89
to bit 91.
Figure 3. FM RF-AGC Bit 92
Table 5. Local Oscillator Prescaler (VCO/Buffer Divider)
Prescaler VCO
Prescaler Buffer
Bit 12
Bit 11
Bit 10
11
X
0
1.5
3
001
1.5
101
22
X
1
0
33
X
1
Table 6. FM-AGC Threshold
FM-AGC Threshold
Bit 65
Bit 64
100 dBV
0
97 dBV
0
1
94 dBV
1
0
91 dBV
1
AGC
B92
PIN Diode
VS
Pin 42
Pin 5
C111
R115
相關PDF資料 |
PDF描述 |
|---|---|
| T4258NFN | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO44 |
| T4260ILS | AUDIO TUNER, PDSO44 |
| T555200-PAE | SPECIALTY CONSUMER CIRCUIT, PXMA |
| T6B70BFNG | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| T6F18 | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| T425I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|400V V(DRM)|25A I(T)RMS|TO-220 |
| T425IFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:THYRISTOR MODULE|TRIAC |
| T425-L | 制造商:NORTH SAFETY PRODUCTS 功能描述:GLOVE SENSITASL POWDER L BX100 制造商:North Safety Products USA 功能描述:GLOVE, SENSITASL, POWDER, L, BX100 制造商:NORTH SAFETY PRODUCTS 功能描述:GLOVE, SENSITASL, POWDER, L, BX100; Safety Category:EN374-1:2003, EN420:2003; Glove Style:Full; Glove Size:L; Glove Colour:White; Glove Material:Latex; Colour:Natural; Design Category:Intermediate; Material:Latex Rubber; Size:L ;RoHS Compliant: NA |
| T425-M | 制造商:NORTH SAFETY PRODUCTS 功能描述:GLOVE SENSITASL POWDER M BX100 制造商:North Safety Products USA 功能描述:GLOVE, SENSITASL, POWDER, M, BX100 |
| T425PF-L | 制造商:NORTH SAFETY PRODUCTS 功能描述:GLOVE SENSITASK PF L BX100 制造商:North Safety Products USA 功能描述:GLOVE, SENSITASK, PF, L, BX100 制造商:NORTH SAFETY PRODUCTS 功能描述:GLOVE, SENSITASK, PF, L, BX100; Safety Category:EN374-1:2003, EN420:2003; Glove Style:Full; Glove Size:L; Glove Colour:White; Glove Material:Latex; Colour:Natural; Design Category:Intermediate; Material:Latex Rubber; Size:L ;RoHS Compliant: NA |
發(fā)布緊急采購，3分鐘左右您將得到回復。