- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373527 > T4260 (Atmel Corp.) AM/FM Front End IC PDF資料下載
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(diào)幅/調(diào)頻前端IC |
| 文件頁數(shù)： | 20/31頁 |
| 文件大?。?/td> | 299K |
| 代理商： | T4260 |
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頁當(dāng)前第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
20
T4260
4528G–AUDR–12/03
DAC1, 2 (Pins 1, 2)
For automatic tuner alignment, the DAC1 and DAC2 of the IC can be controlled by set-
ting gain and offset values. The principle of the operation is shown in Figure 7. The gain
is in the range of 0.67
×
V
Tune
to 2.09
×
V
Tune
. The offset range is +0.98 V to -0.98 V.
For alignment, DAC1 and DAC2 are connected to the varicaps of the preselection filter
and the IF filter. For alignment, offset and gain are set for having the best tuner tracking.
Figure 7.
Block Diagram of DAC1, 2
The gain of DAC1 and DAC2 has a range of approximately 0.67
×
V(VTUNE) to
2.09
×
V(TUNE). This range is divided into 255 steps. One step is approximately (2.09-
0.67)/255 = 0.00557
×
V(TUNE). The gain of DAC1 can be controlled by the Bits 38 to
45 (2
0
to 2
7
) and the gain of DAC2 can be controlled by the Bits 66 to Bit 73 (2
0
to 2
7
) as
given in Table 26.
Table 26.
Gain of DAC1, 2
Gain DAC1
Approximately
Gain DAC2
Approximately
0.6728
×
V(TUNE)
0.6783
×
V(TUNE)
0.6838
×
V(TUNE)
0.6894
×
V(TUNE)
...
0.9959
×
V(TUNE)
...
2.0821
×
V(TUNE)
2.0877
×
V(TUNE)
2.0932
×
V(TUNE)
Offset = 64 (intermediate position)
The offset of DAC1 and DAC2 has a range of approximately +0.98 V to -0.99 V. This
range is divided into 127 steps. One step is approximately 1.97 V/127 = 15.52 mV. The
offset of DAC1 can be controlled by the Bits 24 to Bit 30 (2
0
to 2
6
) and the offset gain of
DAC2 can be controlled by the Bits 52 to Bit 58 (2
0
to 2
6
) as given in Table 27.
B45
B44
B43
B42
B41
B40
B39
B38
Decimal
Gain
Decimal
Gain
0
1
2
3
...
58
...
253
254
255
B73
0
0
0
0
...
0
...
1
1
1
B72
0
0
0
0
...
0
...
1
1
1
B71
0
0
0
0
...
1
...
1
1
1
B70
0
0
0
0
...
1
...
1
1
1
B69
0
0
0
0
...
1
...
1
1
1
B68
0
0
0
0
...
0
...
1
1
1
B67
0
0
1
1
...
1
...
0
1
1
B66
0
1
0
1
...
0
...
1
0
1
VTUNE
Offset
Gain
DAC1, 2
+/-
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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(guān)代理商/技術(shù)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(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 09/Jan/2012 標(biāo)準(zhǔn)包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數(shù)據(jù)傳輸率 - 最大:- 調(diào)制或協(xié)議:- 應(yīng)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(yīng)商設(shè)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。