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參數(shù)資料
| 型號： | T4260 |
| 廠商： | Atmel Corp. |
| 英文描述： | AM/FM Front End IC |
| 中文描述： | 調幅/調頻前端IC |
| 文件頁數(shù)： | 16/31頁 |
| 文件大?。?/td> | 299K |
| 代理商： | T4260 |
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16
T4260
4528G–AUDR–12/03
If Bits 20 and 21 (HCDEL 1) or Bits 22 and 23 (HDCEL 2) are both set to 0, then the
high-current charge pump is deactivated. Otherwise, the delay time can be selected as
described in Table 13.
Table 13.
Delay Time of HCDEL Register
High-current Charge Pump
OFF
Delay time 5 ns
Delay time 10 ns
Delay time 15 ns
2-bit Shift
A divider 2-bit shift (Bit 32 = 0) allows faster frequeny changes by using a four times
higher step frequeny (e.g., f
PDF
= 50 kHz instead of f
PDF
= 12.5 kHz). If the PLL is locked
(after the frequency change), the normal step frequency (e.g., f
PDF
= 12.5 kHz) will be
active again.
If no 2-bit shift is used (Bit 32 = 1), the frequeny changes will be done with the normal
step frequency (12.5 kHz).
In 2-bit shift mode the N- and R-divider are shifted by two bits to the right (this corre-
sponds by a R- and N-divider division by 4). An important condition for this mode is that
the R-divider has to be a multiple of 4.
Table 14.
Manual and Lock Detect Shift Mode
SW1 (Pin 13)
The switching output SW1 (Pin 13) is controlled by Bit 46 as given in Table 15.
Table 15.
Switching Output
REMARK:
SW1 is an open-drain output.
Figure 5.
Internal Components at SW1
B21/B23
0
0
1
1
B20/B22
0
1
0
1
2-bit Shift
B32
0
1
Dividers 2-bit shift
No shift
SW1
High
Low
B46
0
1
SW1
相關PDF資料 |
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| T4260IL | AM/FM Front End IC |
| T4260ILQ | AM/FM Front End IC |
| T435-B | High Performance Triacs(高性能雙向可控硅) |
| T450 | DIL 14 PIN SINGLE OUTPUT |
| T400 | DIL 14 PIN SINGLE OUTPUT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| T4260_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
| T4260_09 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
| T4260IL | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
| T4260-IL | 功能描述:IC RECEIVER AM/FM FRONT 44-SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數(shù)據(jù)傳輸率 - 最大:- 調制或協(xié)議:- 應用:* 電流 - 接收:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| T4260ILQ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
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