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參數(shù)資料
| 型號(hào)： | ATA5744N-TKSY |
| 廠商： | ATMEL CORP |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | SPECIALTY TELECOM CIRCUIT, PDSO20 |
| 封裝： | LEAD FREE, SSO-20 |
| 文件頁(yè)數(shù)： | 16/20頁(yè) |
| 文件大?。?/td> | 316K |
| 代理商： | ATA5744N-TKSY |
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5
4893A–RKE–11/05
ATA5744
Figure 3-2 shows a typical input matching network for f
RF = 315 MHz and fRF = 433.92 MHz
using a SAW. Figure 3-3 on page 6 illustrates the input matching to 50
without a SAW. The
input matching networks shown in Figure 3-3 on page 6 are the reference networks for the
parameters given in the electrical characteristics.
Figure 3-2.
Input Matching Network with SAW Filter
Table 3-1.
Calculation of LO and IF Frequency
Conditions
Local Oscillator Frequency
Intermediate Frequency
f
RF = 315 MHz, MODE = 0
f
LO = 314 MHz
f
IF = 1 MHz
f
RF = 433.92 MHz, MODE = 1
f
LO = 432.92 MHz
f
IF = 1 MHz
300 MHz < fRF < 365 MHz, MODE = 0
365 MHz < f
RF < 450 MHz, MODE = 1
f
LO
f
RF
1
314
----------
+
-------------------
=
f
IF
f
LO
314
----------
=
f
LO
f
RF
1
432.92
------------------
+
----------------------------
=
f
IF
f
LO
432.92
------------------
=
IN
IN_GND
OUT
OUT_GND
CASE_GND
B3555
ATA5744
C3
22p
L
25n
C16
100p
C17
8.2p
L3
TOKO LL2012
F27NJ
27n
C2
8.2p
L2
TOKO LL2012
F33NJ
33n
1
2
3, 4 7, 8
5
6
8
9
RF
IN
f
RF = 433.92 MHz
LNAGND
LNA_IN
IN
IN_GND
OUT
OUT_GND
CASE_GND
B3551
C3
47p
L
25n
C16
100p
C17
22p
L3
TOKO LL2012
F47NJ
47n
C2
10p
L2
TOKO LL2012
F82NJ
82n
1
2
3, 4 7, 8
5
6
8
9
f
RF = 315 MHz
LNAGND
LNA_IN
RF
IN
ATA5744
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