LA1867NM Ver la hoja de datos (PDF) - SANYO -> Panasonic
Número de pieza
componentes Descripción
Fabricante
LA1867NM Datasheet PDF : 32 Pages
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Continued from preceding page.
LA1867NM
Parameter
Symbol
Conditions
min
[FM BLOCK]
VSMFM-1 No input, pin 32 DC output,
0.0
non-mod, SW-2 open
VSMFM-2 50 dBµ, pin 32 DC output,
1.0
non-mod, SW-2 open
Signal meter output
VSMFM-3 70 dBµ, pin 32 DC output,
2.3
non-mod, SW-2 open
VSMFM-4 100 dBµ, pin 32 DC output,
4.7
non-mod, SW-2 open
Muting bandwidth
BW-Mute
100 dBµ, The bandwidth when V23 = 2 V,
non-mod
110
Muting drive output
VMute-100 100 dBµ, pin 23 DC output, non-mod
0.00
[N.C BLOCK]
Noise Canceller Input (pin 20), PG1
Gate time
f = 1 kHz, 1 µs, with a 100 mV p-o pulse
tGATE1 input, the time for V40 to become 1 V
35
or higher
f = 1 kHz, 1 µs, with a 100 mV p-o pulse
tGATE2 input, with the MRC pin 15 input = 1 kHz,
10
30 mV rms
Noise sensitivity
With a 1 kHz signal such that the noise
SN
canceller operation is on, the 1 µs pulse
input level, measure pin 20.
[Multipath suppression circuit]
MRC Input (AC1)
MRC output
VMRC
V18 = 2 V, 1 kHz, 5 mV rms, the pin
12 voltage when there is a pin 15 input
1.75
MRC operating level
MRC-ON V18 = 2 V, the pin 15 input level such
that V12 becomes 1.75 V
Block Functions
1. FM-IF
• IF-limiter amplifier
• S-meter outputs (three systems)
• Quadrature detector
• AF preamplifier
• AFC output
• Muting circuit (band mute, weak input mute, soft mute)
• Control pins (SD, muting attenuation, soft mute on level)
• SD output
• IF counter buffer output
• S-meter output shifter
2. Noise canceller
• Built-in high-pass filter
• Built-in low-pass filter delay circuit
• Noise AGC
• Pilot signal compensation circuit
• Noise reduction setting pin
• Noise canceller off in AM mode function
• High-pass filter “fc” control pin
Rating
typ
0.1
2.1
3.5
6.0
190
0.03
55
25
50
1.85
15
Unit
max
0.3
V
3.3
V
5.3
V
6.7
V
290
kHz
0.20
V
75
µs
40
µs
75
mVp-o
1.95
V
30
mVrms
No. 4619-3/32
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