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Teilenummer | LA1061 |
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Beschreibung | Antenna Switching Controller | |
Hersteller | Sanyo Semicon Device | |
Logo | ||
Gesamt 8 Seiten Ordering number : EN3044A
Monolithic Linear IC
LA1061M
Antenna Switching Controller
Overview
The LA1061M is an antenna switching controller for
mobile radio equipment.
The LA1061M uses a number of inputs from the receiver
circuitry to select the main antenna or sub-antenna
according to signal strength and quality. Weak and strong
signals are detected with the S-meter DC voltage and F.E.
AGC voltage, respectively. Multi-path distortion is
detected from the AC component of the IF output, using
the same high-sensitivity counter circuit as in Sanyo's
earlier LA1060 device. An auxiliary circuit keeps the main
antenna selected for a fixed time period when reception
conditions outside a moving vehicle are changing rapidly.
The LA1061M is available in surface-mount 8-pin DIPs,
facilitating construction of compact equipment. It operates
from a single 7 to 12V power supply.
Package Dimensions
unit: mm
3111-MFP14S
[LA1061M]
SANYO: MFP14S
Features
• Uses Sanyo's proprietary AGC amplifier and detector, providing accurate detection of multi-path distortion.
• High-current Main and Sub-antenna switching outputs.
• Antenna switching frequency limiting circuit.
• On-board comparators for F.E AGC (strong signal) and S-meter DC (weak signal) detection.
• Surface-mount 14-pin MFP.
Specifications
Maximum Ratings at Ta=25°C
Parameter
Symbol
Maximum supply voltage
Allowable power dissipation
VCC max
Pd max
Operating temperature
Topr
Storage temperature
Tstg
Maximum flow-out current
Maximum apply voltage
I4
I5
I6
I9
I10
I12
V13
V14
Conditions
Pin 4
Pin 5
Pin 6
Pin 9
Pin 10
Pin 12
Pin 13
Pin 14
Ratings
14
182
–30 to +80
–40 to +125
1
10
10
2
5
2
VCC
VCC
Unit
V
mW
°C
°C
mA
mA
mA
mA
mA
mA
V
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
82997HA (KT)/9070TA/6019TA, TS No.3044-1/8
Continued from preceding page.
Pin No. Function
AGC
9
Voltage output
Mono-stable
10 multi-vibrator
3
D/A
11
converter
Mono-stable
12 multi-vibrator
2
Weak signal
13
comparator
Strong signal
14
comparator
LA1061M
External circuits
Unit (resistance : Ω, capacitance : F)
Notes
The LA1061M counts antenna
switches for the time interval
generated by multi-vibrator 2.
The internal D/A converter
outputs a current on pin 11,
which is converted to a voltage
by the resistor connected to
this pin. If this voltage exceeds
a certain value, that is, the
switching frequency is too
high , multi-vibrator 3 operates
to hold the antenna switching
outputs at Main for the time set
by multi-vibrator 3.
The threshold level is set at
approximately 2V.
The threshold level is set at
approximately 1V.
No.3044-6/8
6 Page | ||
Seiten | Gesamt 8 Seiten | |
PDF Download | [ LA1061 Schematic.PDF ] |
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