LA1137 Datasheet PDF - Sanyo Semicon Device
| Part Number | LA1137 | |
| Description | AM Tuners for Car Radios and Home Stereos | |
| Manufacturers | Sanyo Semicon Device | |
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Ordering number: EN 3507
Monolithic Linear IC
LA1136N, 1136NM, 1137N, 1137NM
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
6 dB
. 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
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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LA1136N, 1136NM, 1137N, 1137NM
LA1136N, LA1136NM Test Circuit
No. 3507-5/28
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LA1137 electronic component. |
| Information | Total 28 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LA1137.PDF Datasheet ] | |
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