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PDF LA1827M Data sheet ( Hoja de datos )
| Número de pieza | LA1827M | |
| Descripción | Single-Chip Tuner IC for Portable Radio/Cassette Recorders | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : EN5658A
LA1827M
Monolithic Linear IC
LA1827M
Single-Chip Tuner IC for Portable Radio
/Cassette Recorders
Overview
The LA1827M is a single-chip tuner IC for FM and
AM with built-in MPX-VCO which requires no
adjustment and no external parts.
Functions
• AM:
RF amplifier, mixer, oscillator, IF
amplifier, detector, AGC, tuning display
output
• FM-FE: RF amplifier, mixer, oscillator
• FM-IF: IF amplifier, quadrature detector, signal
strength meter, tuning display output
• MPX: PLL stereo decoder, stereo display
output, forced mono, internal VCO
Features
• Single-chip tuner with AM, FM-FE/FM-IF, MPX
circuitry
• Built-in adjustment-free MPX-VCO (no ceramic
oscillator required)
• FM-DET, adjustment-free (using ceramic discrimina-
tor)
• Reduced FM-FE oscillation level
• FM stereo indication and AM/FM tuning indication
pins provided.
Package Dimensions
unit:mm
3112-MFP24S
[LA1827M]
24 13
1 12
12.6 0.15
0.35 1.0 0.8
SANYO:MFP24S
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Indicator drive current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCCmax
ILED
Pd max
Topr
Tstg
Ta ≤ 70°C
Conditions
Ratings
7.0
20
250
–20 to +70
–40 to +125
Unit
V
mA
mW
°C
°C
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability such as life-support systems aircraft s
control systems or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed even momentarily rated values (such as maximum ratings operating condition ranges or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co., Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
71598RM(KI) No. 5658-1/12
1 page  
Ordering number : EN5658A
Continued from preceding page
Pin
number
Function
Quiescent
voltage (V)
AM FM
16 L output
17 R output
1.2 1.2
18 MPX input
1.2 1.2
FM detector
19 output and AM
detector output
0.4 1.2
20 FM-OSC
3.0 2.9
21 VCC2
3.0 2.9
22 FM-RF output
3.0 2.9
24 FM-RF input
0 0.8
23 GND2
00
LA1827M
Equivalent circuit
Remarks
ROUT = 7.5 kΩ
ROUT
16
17
A10849
RIN = 50 kΩ
18
RIN
A10850
ROUT(FM)
19
ROUT(AM)
A10851
21
20
Output impedance
AM: ROUT = 50 kΩ
FM: ROUT = 500 Ω
Capacitance between pin 19
and ground should be
optimzed for the best
separation characteristics.
Colpitts oscillator circuit
FM oscillator coil is connected
to pin 20.
R
21
A10852
4
A10853
FM-FE block VCC
Power is supplied from pin 4
(VCC1) via external resistor
(10 Ω).
FM RF coil is connected
between pins 22 and 21
(VCC2).
RIN = 1.8 kΩ
A10854
FM-FE brock ground
71598RM(KI) No. 5658-5/12
5 Page 
Ordering number : EN5658A
LA1827M
AM characteristics
4
3
2
1
0
0 20 40 60 80 100 120 140
ANT input - dB/m
80 AM VCC characteristics
0
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100 0
4
70 -10
60 -20 3
50 -30
40 -40 2
30
Maximum sensitivity
20 (input for 20 mV output)
-50
-60 1
10 -70
00 1 2 3 4 5 6 7 8-80
Power supply voltage, Vcc - V
80 AM Reception characteristics
0
0
70
60
50
40
30
Maximum sensitivity
(input for 20 mV output)
20
10
0
400
600 800 1000 1200 1400 1600 1800
Reception frequency, fr - kHz
AM beat output
20 40 60 80 100 120
ANT input - dB/m
AM VCC characteristics
140
20
15
10
5
0
12345678
Power supply voltage, Vcc - V
71598RM(KPIS) No. 5658-11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LA1827M.PDF ] | |
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