Ordering number : EN6854A
LA1823
LA1823M
Overview
Monolithic Linear ICs
Single-Chip Tuner ICs
for Use in Radio Cassette Recorder
The LA1823 and the LA1823M are single-chip tuner ICs that incorporate FM/AM and MPX circuits and support
electronic tuning. The built-in MPX-VCO allows these ICs to be adjustment-free and to require no external components.
Features
•
AM, FM frontend/IF and MPX integrated in a single-chip.
•
Built-in MPX VCO circuit
•
Electronic tuning (AM oscillator output, AM/FM IF output)
•
Adjustment-free FM detection (uses a ceramic discriminator)
•
Packages : DIP24S (300mil) [LA1823]
MFP24S (300mil) [LA1823M]
Functions
AM
FM-RF
FM-IF
MPX
: RF amplifier, mixer, oscillator, oscillator buffer, IF amplifier, detector, AGC, IF count buffer output.
: RF amplifier, mixer, and oscillator.
: IF amplifier, quadrature detector, S-meter, and IF counter buffer output.
: PLL stereo decoder, stereo indicator, forced monaural, VCO on chip, Audio mute.
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Indicator drive current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
ILED
Pd max
Topr
Tstg
Pin 8
Ta
≤
70°C
Conditions
Ratings
7.0
20
300
-20 to +70
-40 to +125
Unit
V
mA
mW
°C
°C
Any and all SANYO Semiconductor 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 Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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 Semiconductor
products described or contained herein.
N1506 MS PC B8-8120, B8-5863 No.6854-1/12
LA1823, LA1823M
Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Operation supply voltage range
Symbol
VCC
VCC op
Conditions
Ratings
4.5
1.8 to 6.0
Unit
V
V
Operating Characteristics
at Ta
=
25°C, VCC = 4.5V, in the specified test circuit
Ratings
Parameter
Quiescent supply current
FM-mode quiescent current
AM-mode quiescent current
ICC (FM)
ICC (AM)
10.0
6.5
15.0
9.2
20.0
14.5
mA
mA
Symbol
Conditions
min
typ
max
Unit
FM front-end characteristics at fc = 98MHz, VIN = 60dBμV EMF, fm = 1kHz, 22.5kHz dev
Local oscillator voltage
Input limiting voltage
VOSC
3dB L.S.
No. input, fosc = 108.7MHz,
the pin 20 output
Referenced to 22.5kHz dev, a 3dB down input
12
dBμV EMF
100
mVrms
FM IF characteristics (monaural) at fc = 10.7MHz, VIN = 100dBμV, fm = 1kHz, 75kHz dev
Demodulation output
Signal-to-noise ratio
Total harmonic distortion
(monaural)
Input limiting voltage
IF count buffer on level
IF count buffer output
3dB L.S.
IF buff on
VIF buff
Referenced to 75kHz dev, a 3dB down input
No modulation
No modulation, the pin 7 output
31
35
120
38
45
180
45
55
240
dBμV
dBμV
mVrms
VO
S/N
THD
The pin 16 output
The pin 16 output
The pin 16 output
125
63
165
72
0.5
1.5
210
mVrms
dB
%
FM IF characteristics (stereo) at fc = 10.7MHz, VIN = 100dBμV, fm = 1kHz, 75kHz dev, L+R = 90%, PILOT = 10%
Separation
Stereo on level
Total harmonic distortion (stereo)
SEP
ST-ON
THD
Left channel modulated, the pin 16 and pin 17
outputs
The pilot modulation such that the pin 8 voltage
becomes lower than 0.5V
Main modulation, the pin 16 output
0.5
1.7
%
2.4
3.5
7.2
%
25
40
dB
AM characteristics at fc = 1000kHz, fm = 1kHz, mod = 30%
Detector output
VO1
VO2
Signal-to-noise ratio
S/N1
S/N2
Total harmonic distortion
OSC buffer output
IF count buffer on level
IF count buffer output
THD
VOSC buff
IF buff on
VIF buff
VIN = 23dBμV, the pin 16 output
VIN = 80dBμV, the pin 16 output
VIN = 23dBμV, the pin 16 output
VIN = 80dBμV, the pin 16 output
VIN = 80dBμV, the pin 16 output
No input, the pin 8 output
No modulation
VIN = 80dBμV, no modulation, the pin 7 output
80
15
110
14
50
15
47
26
75
20
54
0.5
100
25
180
1.5
160
32
220
50
120
mVrms
mVrms
dB
dB
%
mVrms
dBμV
mVrms
No.6854-2/12
Talking
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