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LA1867NM Datenblatt(PDF) 3 Page - Sanyo Semicon Device

Teilenummer LA1867NM
Bauteilbeschribung  Car Radio Single-Chip Tuner System
Download  32 Pages
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Hersteller  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA1867NM Datenblatt(HTML) 3 Page - Sanyo Semicon Device

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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
No. 4619-3/32
LA1867NM
Parameter
Symbol
Conditions
Rating
Unit
min
typ
max
[FM BLOCK]
VSMFM-1
No input, pin 32 DC output,
0.0
0.1
0.3
V
non-mod, SW-2 open
VSMFM-2
50 dBµ, pin 32 DC output,
1.0
2.1
3.3
V
Signal meter output
non-mod, SW-2 open
VSMFM-3
70 dBµ, pin 32 DC output,
2.3
3.5
5.3
V
non-mod, SW-2 open
VSMFM-4
100 dBµ, pin 32 DC output,
4.7
6.0
6.7
V
non-mod, SW-2 open
Muting bandwidth
BW-Mute
100 dBµ, The bandwidth when V23 = 2 V,
110
190
290
kHz
non-mod
Muting drive output
VMute-100
100 dBµ, pin 23 DC output, non-mod
0.00
0.03
0.20
V
[N.C BLOCK]
Noise Canceller Input (pin 20), PG1
f = 1 kHz, 1 µs, with a 100 mV p-o pulse
tGATE1
input, the time for V40 to become 1 V
35
55
75
µs
or higher
Gate time
f = 1 kHz, 1 µs, with a 100 mV p-o pulse
tGATE2
input, with the MRC pin 15 input = 1 kHz,
10
25
40
µs
30 mV rms
With a 1 kHz signal such that the noise
Noise sensitivity
SN
canceller operation is on, the 1 µs pulse
50
75
mVp-o
input level, measure pin 20.
[Multipath suppression circuit]
MRC Input (AC1)
MRC output
VMRC
V18 = 2 V, 1 kHz, 5 mV rms, the pin
1.75
1.85
1.95
V
12 voltage when there is a pin 15 input
MRC operating level
MRC-ON
V18 = 2 V, the pin 15 input level such
15
30
mVrms
that V12 becomes 1.75 V


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