參數(shù)資料
型號(hào): TDA8295HN/C2
廠商: NXP SEMICONDUCTORS
元件分類: 接收器
英文描述: AM/FM, AUDIO/VIDEO DEMODULATOR, PQCC40
封裝: 6 X 6 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT618-1, HVQFN-40
文件頁(yè)數(shù): 36/83頁(yè)
文件大?。?/td> 3440K
代理商: TDA8295HN/C2
TDA8295_C2_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 27 November 2009
41 of 83
NXP Semiconductors
TDA8295
Digital global standard low IF demodulator for analog TV and FM radio
[1]
Depending on actual frequency of crystal or clock signal it might happen in rare cases that AFC read value
is corrupted. For channel search algorithm it is recommended to read three times the AFC register and
discard the obviously false value.
[1]
See Section 12 for nominal IF frequencies.
Fig 11. Typical AFC readout versus frequency deviation of picture carrier
Table 43.
Calculation of frequency deviation from AFC value
Deviation from nominal
IF frequency[1]
AFC[7] AFC[6] AFC[5] AFC[4] AFC[3] AFC[2] AFC[1] AFC[0]
fIF = fnom 1674.3 kHz
0
1
fIF = fnom 1661.1 kHz
0
1
0
:
fIF = fnom 830.6 kHz
0
1
fIF = fnom 817.4 kHz
0
1
0
:
fIF = fnom 13.2 kHz
0
1
fIF = fnom
0
fIF = fnom + 13.2 kHz
1
:
fIF = fnom + 830.6 kHz
1
0
1
fIF = fnom + 843.8 kHz
1
0
:
fIF = fnom + 1674.3 kHz
1
0
1
fIF = fnom + 1687.5 kHz
1
0
fIF fnom at input (kHz)
1000
600
200
600
001aal143
100
300
500
700
1100
900
AFC × 6750
512
(kHz)
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