LA1781M_09 Datasheet, PDF (4/48 Pages) Sanyo Semicon Device – For Car Radios Single-Chip Tuner IC

Package Dimensions
unit : mm (typ)
3159A
48
49
17.2
14.0
33
32
64
1
0.8
(1.0)
17
16
0.35
LA1781M
Pd max -- Ta
1000
950
900 Mounted on a specified board :
40 × 80 × 1.3mm³
800
glass epoxy board
700
Independent IC
600
500
400
300
200
100
0
0.15
--40
--20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
SANYO : QIP64E(14X14)
Function List
1. FM Front End (Equivalent to the Sanyo LA1193)
(1) Double input type double balanced mixer
(2) Pin diode drive AGC output
(3) MOSFET second gate drive AGC output
(4) Keyed AGC adjustment pin
(5) Differential IF amplifier
(6) Wide band AGC sensitivity setting pin, and narrow
band AGC sensitivity setting pin
(7) Local oscillator
2. FM IF
(1) IF limiter amplifier
(2) S-meter output (also used for AM) 6-stage pickup
(3) Multipath detection pin (shared FM signal meter)
(4) Quadrature detection
(5) AF preamplifier
(6) AGC output
(7) Band muting
(8) Weak input muting
(9) Soft muting adjustment pin
(10) Muting attenuation adjustment pin
(11) IF counter buffer output (also used for AM)
(12) SD (IF counter buffer on level) adjustment pin
(13) SD output (active high) (also used for AM)
3. Noise Canceller
(1) High-pass filter (first order)
(2) Delay circuit based low-pass filter (fourth order)
(3) Noise AGC
(4) Pilot signal compensation circuit
(5) Noise sensitivity setting pin
(6) Function for disabling the noise canceller in AM
mode
4. Multiplex Functions
(1) Adjustment-free VCO circuit
(2) Level follower type pilot canceller circuit
(3) HCC (high cut control)
(4) Automatic stereo/mono switching
(5) VCO oscillation stop function (AM mode)
(6) Forced monaural
(7) SNC (stereo noise controller)
(8) Stereo display pin
(9) Anti-birdie filter
5. AM
(1) Double balanced mixer (1st, 2nd)
(2) IF amplifier
(3) Detection
(4) RF AGC (narrow/wide)
(5) Pin diode drive pin
(6) IF AGC
(7) Signal meter output (also used for FM)
(8) Local oscillator circuits (first and second)
(9) Local oscillator buffer output
(10) IF counter buffer output (also used by the FM IF)
(11) SD (IF counter buffer on level) adjustment pin
(12) SD output (active high) (also used for AM)
(13) Wide AGC
(14) Detection output frequency characteristics
adjustment pin (low cut, high deemphasis)
(15) AM stereo buffer
6. MRC (multipath noise rejection circuit)
7. AM/FM switching output (linked to the FM VCC)
No.6038-4/48