LV25400W Sanyo Semicon Device, LV25400W Datasheet - Page 36

• Manufacturer Part Number: LV25400W
• Description: DSP Tuner Front End
• Manufacturer: Sanyo Semicon Device

www.DataSheet.co.kr
Continued from preceding page.
Programmable Divider Structure
(29)
(30)
(31)
(32)
(33)
(34)
(35)
(36)
(37)
No.
DVS
1
0
AM/FM narrow AGC setting
D33-4 to D33-7
Keyed AGC setting
D32-8 to D32-11
AM RF AGC amplifier
threshold (steep) setting
D32-12 to D32-15
AM RF AGC amplifier
threshold (gradual) setting
D32-16 to D32-19
S-meter shifter control
D32-20 to D32-24
Analog (narrow) IF AGC
clamp variations correction
D32-25 to D32-28
FM PIN diode forced on
state bit
FMFETOFF
Keyed AGC connection
circuit selection
W_KEYED
D31-31
D32-31
FMIN
DVS
Control block/data
Set divisor (N)
272 to 65535
-
* : Since the IC is closed internally, the input sensitivity is not specified.
• Sets the AM/FM narrow AGC sensitivity.
4 bit
• Controls the FM keyed AGC sensitivity.
4 bit
• Sets the AM RF AGC amplifier circuit threshold (steep).
4 bit
• Sets the AM RF AGC amplifier circuit threshold (gradual).
4 bit
• Controls the FM S-meter shifter circuit output value.
5 bit
• Corrects the sample-to-sample variations in the IF AGC clamp circuit.
• Forcibly sets the FM PIN diode to the on state.
1 bit
• Modifies the keyed AGC connection circuit.
1 bit
• Sub-code address
Each 1 bit
Input frequency range (f (MHz))
Amount of correction : ±5 dB
4 bit
Swallow
Counter
120 ≤ f ≤ 270
4 bits
Keyed AGC switch
-
0
1
LV25400W
Wide + narroww
Narrow only
Description
IC internal FMIN pin
Programmable
Selected
Stopped
Divider
12 bits
fvco = ferf × N
ferf
fvco/N
PD
φE
Related data
No.A0633-36/42
Datasheet pdf - http://www.DataSheet4U.net/