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LA1136N Fiches technique(PDF) 1 Page - Sanyo Semicon Device

No de pièce LA1136N
Description  AM Tuners for Car Radios and Home Stereos
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA1136N Fiches technique(HTML) 1 Page - Sanyo Semicon Device

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AM Tuners for Car Radios and Home Stereos
Overview
The LA1136N/NM and LA1137N/NM are high-performance
AM electronic tuner ICs offering sophisticated functions. They
are especially suited for use in car radio and home stereo
(antenna: loop) applications.
Functions
.
MIX
.
OSC (with ALC)
.
IF amplifier
.
Detector
.
AGC (normal)
.
RF wide-band AGC
.
Auto search stop signal (Signal meter output)
.
Local oscillation buffer output
.
IF band switching circuit (for LA1136N only)
.
IF count buffer
.
Stop detector output (can be set independently)
.
Tweet prevention circuit
.
AGC (RF, IF) time constant switching circuit
.
IF AGC circuit
.
Pin-diode driver
.
AM stereo decoder IF output (for LA1136N only)
.
Circuit preventing incorrect seek operation
Features
.
Excellent cross modulation characteristic: Meets the
requirements for preventing not only adjacent-channel
interference but also interference caused by all channels
within broadcast band.
.
Narrow-band signal meter output: Usable as auto search stop
signal. Has linearity up to 100 dBµ.
.
Local oscillation buffer output: Facilitates designing of
electronic tuner system, frequency display, etc.
.
OSC (with ALC): Improves tracking error because
oscillation output is stabilized at a low level (350 mVrms:
LA1137N) for varactor diode.
.
MIX: Double-balanced differential MIX meeting the
requirements for preventing spurious interference, IF
interference.
.
Good characteristic at high input: 130 dBµ input
fm = 400 Hz 80%mod THD = 0.5% typ.
.
High S/N: Good S/N at medium input (55 dB typ).
.
Usable sensitivity: (S/N = 20 dB input): 25 dBµ
(when using 2SK715 )
.
VCC variation compensation: Less variation in gain,
distortion: 8 to 12 V
AM stereo capability (LA1136N only)
.
IF band switching circuit on chip; controlled by
microcontroller
.
Oscillating circuit for AM stereo; SUB S/N improved to
6dB
.
IF output for AM stereo decoder
.
Improved tweet characteristics: 10 dB increase, controlled by
microcontroller
.
Improved cross modulation characteristics, especially
sensitivity suppression characteristics: 15 dB improvement,
wide-band AGC operation even for SW band interference
.
Improved low-frequency modulation distortion
.
Improved temperature characteristics: S-meter, SD sensitivity
.
Faster RF AGC response: RF: 1/3; IF: 1/8 (compared to
predecessors)
.
Improved capability for driving external RF AGC transistors:
IB max = 200 µA
.
Measures to prevent incorrect seek operation
.
IF count buffer on chip; controlled by microcontroller
.
Time constant switching circuit on chip for RF and IF
AGC
.
IF AGC clear circuit on chip
.
Measures that prevent stopping one station too soon
Ordering number: EN 3507
Monolithic Linear IC
LA1136N, 1136NM, 1137N, 1137NM
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA(II)/4281TS(US) No.3507-1/28


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