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LV25400W_0712 Datasheet(PDF) 36 Page - Sanyo Semicon Device

Part No. LV25400W_0712
Description  For Automotive Applications DSP Tuner Front End
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LV25400W_0712 Datasheet(HTML) 36 Page - Sanyo Semicon Device

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LV25400W
No.A0633-36/42
Continued from preceding page.
No.
Control block/data
Description
Related data
(29)
AM/FM narrow AGC setting
D33-4 to D33-7
• Sets the AM/FM narrow AGC sensitivity.
4 bit
(30)
Keyed AGC setting
D32-8 to D32-11
• Controls the FM keyed AGC sensitivity.
4 bit
(31)
AM RF AGC amplifier
threshold (steep) setting
D32-12 to D32-15
• Sets the AM RF AGC amplifier circuit threshold (steep).
4 bit
(32)
AM RF AGC amplifier
threshold (gradual) setting
D32-16 to D32-19
• Sets the AM RF AGC amplifier circuit threshold (gradual).
4 bit
(33)
S-meter shifter control
D32-20 to D32-24
• Controls the FM S-meter shifter circuit output value.
5 bit
(34)
Analog (narrow) IF AGC
clamp variations correction
D32-25 to D32-28
• Corrects the sample-to-sample variations in the IF AGC clamp circuit.
Amount of correction : ±5 dB
4 bit
(35)
FM PIN diode forced on
state bit
FMFETOFF
• Forcibly sets the FM PIN diode to the on state.
1 bit
(36)
Keyed AGC connection
circuit selection
W_KEYED
• Modifies the keyed AGC connection circuit.
1 bit
Keyed AGC switch
0
1
Wide + narroww
Narrow only
(37)
D31-31
D32-31
• Sub-code address
Each 1 bit
Programmable Divider Structure
DVS
Set divisor (N)
Input frequency range (f (MHz))
IC internal FMIN pin
1
272 to 65535
120
≤ f ≤ 270
Selected
0
-
-
Stopped
* : Since the IC is closed internally, the input sensitivity is not specified.
4 bits
12 bits
Programmable
Divider
Swallow
Counter
φE
fvco/N
PD
ferf
fvco = ferf
× N
FMIN
DVS


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