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PDF LA1193M Data sheet ( Hoja de datos )
| Número de pieza | LA1193M | |
| Descripción | High-Performance FM Front End for Car Radios | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : EN4715A
Monolithic Linear IC
LA1193M, 1193V
High-Performance FM Front End for Car Radios
Overview
The LA1193M and LA1193V are front-end ICs developed
for use in car radios. It incorporates an extremely wide
dynamic range mixer and a new AGC system consisting
of a dual-system wide-band AGC and a new keyed AGC
to provide excellent interference suppression
characteristics.
Functions
• Double-balance mixer
• Pin diode drive output
• Differential IF amplifier
• Dual-system wide-band AGC circuit
• Local buffer output
• 3D-AGC system
• FET gate drive AGC output
• IF amplifier gain control pin
Features
• Improved interference characteristics
— Expanded mixer input dynamic range
Mixer input usable sensitivity: 15 dBµ
Mixer input I.M. QS:
90 dBµ
(The dynamic range has been increased by 6 dB
over the earlier LA1175M.)
— Development of a new wide-band AGC circuit
Improved interference characteristics for both near-
channel interference and far-channel interference
Improved interference characteristics for the TV band
— Development of a 3D-AGC system
The adjacent channel two-signal interference
characteristics can be effectively improved without
degrading the strong-field three-signal interference
characteristics during keyed AGC operation.
• Improved temperature characteristics
— Conversion gain
— AGC sensitivity
— Antenna damping drive output current
Package Dimensions
unit: mm
3036B-MFP20
[LA1193M]
unit: mm
3179A-SSOP20
[LA1193V]
• Improved stability design
— AGC circuit local oscillator isolation
Measures were taken to prevent the deterioration of
AMR, noise level, THD and other characteristics
during AGC operation.
— AGC circuit incorrect operation measures
The LA1193M provides methods to prevent
incorrect operation due to local oscillator injection
and loss of DC balance.
SANYO: SSOP20
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
31097HA (OT)/61094TH(OT) A8-9997 No. 4715-1/21
1 page  
LA1193M, 1193V
Continued from preceding page.
US band antenna coil SA-140 or SA-231
US band oscillator coil SA-278
Mixer coil (for both bands) SA-266
Pin Functions
Pin No.
Function
1 OSC BUFF
2 OSC Tr. base
3 OSC GND
4 OSC Tr. emitter
5 OSC VCC
Equivalent circuit
Note
Colpitts oscillator
Continued on next page.
No. 4715-5/21
5 Page 
LA1193M, 1193V
4. Mixer
The mixer circuit used in this IC is a balanced input/balanced output double balance mixer circuit.
• Input Format
Emitter input
Input impedance: 25 Ω
Optimization of the component geometry, emitter
current and bias allow this circuit to achieve the
following performance.
Mixer input usable sensitivity: 15 dBµ
Mixer input IMQS*: 90.5 dBµ
Note: * Mixer input IMQS is defined as follows:
Figure 4 Mixer Circuit
(Improved by 6.0 dBµ over previous products.)
fr = 98.8 MHz, no input
fu1 = 98.8 MHz, 1 kHz, 30% modulation
fu2 = 99.6 MHz, no modulation
5. IF Amplifier
IMQS is the interference 1 and 2 input levels such that when an
interference signal with the same level is input to the mixer and
distortion occurs at the mixer, the generated IM output has a S/N
ratio of 30 dB.
This IF amplifier is a single stage differential amplifier.
Specifications
Input impedance: 330 Ω
Output impedance: 330 Ω
Gain:
25 dB
Gain adjustment can be provided using either of
the methods shown.
IF Gain adj
Temperature Characteristics
The LA1193M/V uses Vref temperature characteristics correction to hold the gain temperature characteristics to the
low level of about 1 dB over the range –30 to +80°C.
No. 4715-11/21
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet LA1193M.PDF ] | |
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