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參數(shù)資料
| 型號： | T4260ILS |
| 廠商： | ATMEL CORP |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | AUDIO TUNER, PDSO44 |
| 封裝： | SSO-44 |
| 文件頁數(shù)： | 5/30頁 |
| 文件大小： | 299K |
| 代理商： | T4260ILS |
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13
T4260
4528I–AUDR–08/04
Bus Control
IF-AGC
The IF-AGC controls the level of the IF signal that is passed to the external ceramic filter
and the IF input (AM pin 35 or FM pin 36 and pin 34). In AM mode the time constant can
be selected by the external capacitors at pin 32 (IFAGCA1) and pin 10 (IFAGCA2) and
in FM mode by an external capacitor at pin 31 (IFAGCFM). In AM mode, the double pole
(by the capacitors at pin 32 and pin 10) allows a better harmonic distortion by a lower
time constant.
The IF-AGC threshold can be controlled by setting bits 0 to 2 as given in Table 2.
The IF-AGC ON/OFF can be controlled by bit 16 as given in Table 3.
PD Test
A special test mode for PD is implemented for final production test only. This mode is
activated by setting bit 3 = 1. This mode is not intended to be used by customer
application. For normal operation bit 3 has to be set to 0.
N1/N2
The N2/N1 bit controls the active N-divider. Only one of the two N-Divider can be active.
The N1-Divider is activated by setting bit 5 = 0, the N2-Divider by setting bit 5 = 1.
Table 2. IF-AGC Threshold
IF-AGC
B2
B1
B0
109 dBV
0
111 dBV
0
1
113 dBV
0
1
0
115 dBV
0
1
117 dBV
1
0
118 dBV
1
0
1
119 dBV
1
0
121 dBV
1
Table 3. IF-AGC
IF-AGC ON/OFF
B16
IF-AGC ON
0
IF-AGC OFF
1
Table 4. PD-Test Mode
PD TE/PD
B3
Pin 17 = AMLF output (standard)
0
Pin 17 = PD Test mode
1
Table 5. N-Divider
N2/N1
B5
N1-divider active
0
N2-divider active
1
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| T4260-ILSH | 功能描述:射頻無線雜項 COM.RADIO-AM/FM FE DIG.CONCEPT 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 |
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