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零件编号 | LA1193M | ||
描述 | High-Performance FM Front End for Car Radios | ||
制造商 | Sanyo Semicon Device | ||
LOGO | |||
1 Page
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. Oscillator Circuit
LA1193M, 1193V
Steps were taken to prevent AMR degradation during earlier product type
AGC operation, since the local oscillator block in this IC has independent
Vd (pin 5) and ground (pin 3) connections.
This is a Colpitts oscillator and has the same structure as that used in
earlier circuits. The oscillation level and intensity are changed by
capacitors C2-4, C4 and CP.
2. Local Oscillator Buffer Output
This buffer is an emitter follower circuit.
If desired, the buffer efficiency can be increased by inserting a resistor
between pin 1 and ground to pass more current through the buffer
transistor. However, this current must be limited so that Pdmax for the
package is not exceeded.
3. Interference Characteristics
The LA1193M incorporates a newly developed 3D-AGC (triple dimension) circuit. This circuit allows three-signal
interference characteristics (inter-modulation characteristics) and two-signal sensitivity suppression characteristics to
be provided at the same time, a combination of characteristics previously thought difficult to achieve.
• Inter-Modulation Characteristics
The LA1193M prevents inter-modulation distortion by applying two wide-band AGC circuits.
Figure 1
No. 4715-8/21
VAGC – VCL20
LA1193M, 1193V
VAGC20 – VCL20
Pin 20 voltage, VCL20 – V
AGC ON level– Ta
Pin 20 voltage, VCL – V
AGC ON level – Ta
Ambient temperature, Ta – °C
AGC ON level – Ta
Ambient temperature, Ta – °C
VAGC – f
Ambient temperature, Ta – °C
Unit (Resistance: Ω, Capacitance: F)
AGC input frequency – MHz
No. 4715-16/21
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页数 | 21 页 | ||
下载 | [ LA1193M.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
LA1193M | High-Performance FM Front End for Car Radios | Sanyo Semicon Device |
LA1193V | High-Performance FM Front End for Car Radios | Sanyo Semicon Device |
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