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參數(shù)資料
| 型號： | LV25450PNW |
| 元件分類： | 調諧器 |
| 英文描述： | AUDIO TUNER, PQFP64 |
| 封裝： | 10 X 10 MM, SQFP-64 |
| 文件頁數(shù)： | 29/40頁 |
| 文件大?。?/td> | 1251K |
| 代理商： | LV25450PNW |
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LV25450PNW
No.A1668-35/40
Continued from preceding page.
No.
Control block/data
Description
Related data
(27)
IF AGC amplifier circuit off
switching
NARROW_OFF
Switches off the IF AGC amplifier circuit.
1 bit
IF AGC amplifier
0
1
ON (normal operation)
OFF
(28)
AM/FM wide AGC setting
W_AGC0 to W_AGC3
Sets the AM/FM wide AGC sensitivity.
4 bit
AM/FM
(29)
AM/FM narrow AGC setting
N_AGC0 to N_AGC3
Sets the AM/FM narrow AGC sensitivity.
4 bit
AM/FM
(30)
AM RF AGC amplifier
threshold (steep) and
Keyed AGC setting data
KEY_AGC0 to KEY_AGC3
Sets the AM RF AGC amplifier circuit threshold (steep) and the FM Keyed AGC
sensitivity.
4 bit
AM-RF-AGC
FM-Keyed
Amp threshold (steep)
AGC threshold
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
1.0V
↓
2.5V
0.14V
↓
2.2V
AM/FM
(31)
AM RF AGC amplifier
threshold (gradual) and All
Pass Filter setting data
APF_ADJ0 to APF_ADJ3
Data used to set the AM RF AGC amplifier threshold (gradual) and the All Pass Filter.
4 bit
AM-RF-AGC
FM-Keyed AGC threshold
phase shift
Amp threshold
the software
trimming
(gradual)
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
1.0+VBE
↓
2.5V+VBE
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0
0 0 1 0
1 1 0 1
0 0 1 1
1 0 1 1
0 1 1 1
1 1 1 1
0
1
2
3
4
11
12
13
14
15
Small
↓
Large
AM/FM
(32)
S-meter shifter control
S_METER0 to S_METER4
Controls the FM S-meter shifter circuit output value.
5 bit
(33)
Analog (narrow) IF AGC
clamp variations correction
ADJ_N0 to ADJ_N2
Corrects the sample-to-sample variations in the IF AGC clamp circuit.
Amount of correction : ±2 dB
3 bit
(34)
FM PIN diode forced on
state bit
FMFETOFF
Forcibly sets the FM PIN diode to the on state.
1 bit
Continued on next page.
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