LV25400W Sanyo Semicon Device, LV25400W Datasheet - Page 30

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

w w w . D a t a S h e e t . c o . k r
(37) (36) (35)
L L L L
IF AGC clamp variations
correction
IN3-2 D28-25
(narrow-out side)
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
L L L L
Keyed AGC switch
(34)
0
1
+5dB
-5dB
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
Wide+narrow
Narrow only
S-Meter Shift(TSOUT)
0 0 0 0 0
0 0 0 0 1
0 0 0 1 0
0 0 0 1 1
0 0 1 0 0
0 0 1 0 1
0 0 1 1 0
0 0 1 1 1
1 1 0 1 0
1 1 0 1 1
1 1 1 0 0
1 1 1 0 1
1 1 1 1 0
1 1 1 1 1
L L L
(33)
198µA(1.2V)
300µA(1.9V)
L L
AM RF AGC
amplifier threshold (gradual)
FM PIN diode forced on switch
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
0
1
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
L
LV25400W
(32)
Normal operation
Forced on
L
1.0
2.5
L
+V BE
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
+V BE
L L L L L L L L L L L L L L L
AM RF AGC
amplifier threshold (steep)
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
Sub Address Code
(31)
1.0
2.5
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
Keyed AGC
threshold
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
1
(30)
Address 69h, Subaddress [1]
0.14
2.2
FM/AM
N-AGC
Sensitivity
A
3
0 1 1 0 1 0 0 1
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
(29)
A
2
IN3-2 tuner setting 2
Address Code
A
1
A
0
0.14
2.5
FM/AM
W-AGC
Sensitivity
B
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
3
(28)
B
2
B
1
No.A0633-30/42
0.14
2.57
L
B
0
IN
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