LA1824
No.6855-1/10
Overview
The LA1824 is a single-chip tuner IC that incorporates
FM/AM and MPX circuits.
The built-in MPX-VCO allows this IC to be adjustment free
and to require no external components.
Features
FM, AM and MPX integrated in a single-chip.
Adjustment free MPX-VCO
: No ceramic resonator used.
FM front-end : Local OSC voltage reduced.
FM stereo and FM/AM tuning indicator
output provided.
Package : DIP-24S.
Functions
FM
: RF amplifier, mixer, oscillator, IF amplifier,
detector, signal meter, tuning indicator.
AM
: RF amplifier, mixer, oscillator (with ALC),
IF amplifier, detector, AGC, tuning indicator.
MPX : PLL stereo decoder, stereo indicator, VCO on chip, forced monaural.
Specifications
Maximum Ratings
at Ta = 25
C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
7.0
V
Indicator drive current
ILED
Pin 8, 9
20
mA
Allowable power dissipation
Pd max
Ta
70
C
300
mW
Operation temperature
Topg
--20 to +70
C
Ambient temperature
Tstg
--40 to +125
C
Recommended Operating Conditions
at Ta = 25
C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
4.5
V
Operation supply voltage range
VCC op
2.5 to 6.0
V
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Ordering number : ENN*6855
LA1824
Single Chip Tuner IC for Use
in Radio/Cassette Products with Manual Tuning
[LA1824]
11201 RM (IM)
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.
Monolithic Linear IC
Preliminary
Package Dimensions
unit : mm
3067A
0.48
(3.25)
3.3
3.9max
0.51min
21.0
(0.71)
1.78
0.25
7.62
6.4
1
12
24
13
0.95
0.9
SANYO : DIP-24S(300mil)
LA1824
No.6855-2/10
Operating Characteristics
at Ta = 25
C, VCC = 4.5 V, in the specified test using
the IC179-2 socket (Yamaichi Electric Co.,Ltd.)
FM front-end characteristics
at fc = 98 MHz, fm = 1 kHz, 22.5 kHz dev
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Local oscillator voltage
VOSC
No input, fosc = 108.7 MHz, the pin 20 output
15
30
60
mVrms
with FET buffer gain = --10 dB
Input limiting voltage
3 dB L.S.
Referenced to VIN = 60 dB
V EMF,
--
13
-- dB
V EMF
22.5 kHz dev, a 3 dB down input
Quieting sensitivity
Q.S.
30 dB quieting sensitivity
--
12
-- dB
V EMF
FM IF characteristics (monaural)
at fc = 10.7 MHz, fm = 1 kHz, 75 kHz dev
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Quiescent current
ICC(FM)
No input
7.0
13.7
20
mA
Demodulation output
VO
VIN = 100 dB
V, the pin 16 output
130
190
260
mVrms
Signal-to-noise ratio
S/N
VIN = 100 dB
V, the pin 16 output
62
70
--
dB
Total harmonic distortion (mono)
THD
VIN = 100 dB
V, the pin 16 output
--
0.4
1.2
%
Input limiting voltage
3 dB L.S.
Referenced to VIN = 100 dB
V,
21
32
42
dB
V
75 kHz dev, a 3 dB down input
Station detector sensitivity
SD-ON
No mod, an input level great enough to turn
--
33
--
dB
V
on the station detector
FM IF characteristics (stereo)
at fc = 10.7 MHz, fm = 1 kHz, L + R = 90 %, Pilot = 10 %
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Separation
SEP
VIN = 100 dB
V, L modulation, the pin
25
40
--
dB
16 output/the pin 17 output
Stereo on level
ST-ON
VIN = 100 dB
V, the pilot modulation
1.5
3.5
6.3
%
search that V8 < 0.5 V
Total harmonic distortion (main)
THD
VIN = 100 dB
V, Main modulation, the pin
--
0.5
1.2
%
16 output
AM characteristics
at fc = 1000 kHz, fm = 1 kHz, 30 % modulation
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Quiescent current
ICC(AM)
No input
5.0
8.5
15
mA
Detector output
VO(1)
VIN = 23 dB
V, the pin 16 output
18
40
70
mVrms
VO(2)
VIN = 80 dB
V, the pin 16 output
50
85
130
mVrms
Signal-to-noise ratio
S/N(1)
VIN = 23 dB
V, the pin 16 output
15
20
--
dB
S/N(2)
VIN = 80 dB
V, the pin 16 output
47
53
--
dB
Total harmonic distortion
THD(1)
VIN = 80 dB
V, the pin 16 output
--
0.5
1.3
%
THD(2)
VIN = 107 dB
V, the pin 16 output
--
0.5
1.5
%
Station detector sensitivity
SD-ON
No mod, an input level great enough to turn
--
26
--
dB
V
on the station detector
LA1824
No.6855-3/10
ILA00376
+
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
18
16
15
14
13
AM
RF
AM
MIX
AM
OSC
FM
MIX
ST
LED
TUN
LED
FM
IF
AM-IF
S-METER
DET
PHASE
COMP
V
CC
2
GND2
B.
P
.
F
REG
V
CC
1
GND1
AG
C
V-
A
G
C
450kHz
TRIG
ST SW
VCO
FF
FF
FF
PILO
T
DET
FM
RF
+
V
CC
+
+
10.7MHz
FM ST
AM / FM
TUN
AM Ant
FM Ant
R-OUT
AM
FM
20
FM
OSC
19
17
DECODER
L-OUT
+
MN
ST
DET
+
Block Diagram
LA1824
No.6855-4/10
Sample Application Circuit Diagram
ILA00377
+
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
18
16
15
14
13
1000pF
18pF
8pF
4.7
F
LA1824
1800pF
6800pF
6800pF
3.3k
2.2k
0.47
F
0.1
F
3.3
F
47000pF
47000pF
10
10
B.
P
.
F
22
F
FM RF
FM OSC
+
V
CC
=4.5V
450kHz
AM-IFT
100
FM-IFT
+
+
+
+
10.7MHz
0.047
F
22pF
8pF
390pF
0.047
F
10
F
AM-OSC
100
F
1k
1k
FM ST
AM / FM
SD
AM antenna
FM antenna
R-OUT
AM
FM
20
19
17
L-OUT
+
MN
ST
FM-DET
LA1824
No.6855-5/10
Coil specifications
(bottom view)
FM-BPF : SA-309 (Sumida) 88 MHz to 108 MHz
FM-RF
: SA-149 (Sumida) 3.6 mm diameter, air core, 0.6 mm wire, 4.5 T
FM-OSC : SA-151 (Sumida) 3.6 mm diameter, air core, 0.6 mm wire, 3.5 T
FM-MIX : SA-165 (Sumida)
: A119ACS-19458X (Toko)
4-6
2 T
3-1
10 T
3-1
12 T
4-6
2 T
0.12UEW
0.1-2UEW
fo = 10.7 MHz
fo = 10.7 MHz
Qo
50
Qo
60
100 pF internal
100 pF internal
FM-DET : SA-1134 (Sumida)
: A119ACS-19459Z (Toko)
1-3
12 T
1-3
11 T
0.10UEW
0.1-2UEW
fo = 10.7 MHz
fo = 10.7 MHz
Qo
70
Qo
70
82 pF internal
82 pF internal
AM-OSC : SA-181 (Sumida)
: L7BRS-3132AQ (Toko)
6-4
37 T
3-1
64 T
3-1
74 T
6-4
32 T
0.06UEW
0.06-2UEW
fo = 796 kHz
fo = 796 kHz
Qo
80
Qo
65
L = 140
H
L = 140
H
AM-MIX : SA-1136 (Sumida)
: PCFAZ-082 (Toko)
3-2
122 T
1-2
47 T
4-6
9 T
2-3
100 T
2-1
62 T
4-6
12 T
0.06UEW
fo = 450 kHz
fo = 450 kHz, Qo
65
180 pF internal
180 pF internal
With AM-IF filter
FM-IF filter : SFE10.7MS2 (Murata)
AM-IF filter : SFU450B (Murata)
Poly-varicon : FT-2217 (Toko)
MW Bar-antenna : C8E-A0105 (Toko)
1-2
67 T
3-4
9 T
fo = 796 kHz
Qu = 180 min
L = 260
H
2
ILA00378
3
1
S
S
4
6
CF
VCC
pin5
GND
2
ILA00382
3
1
S
S
4
6
CF
VCC
pin5
GND
2
ILA00379
3
1
S
4
6
VCC
pin13
2
ILA00379
3
1
S
4
6
VCC
pin13
2
ILA00380
3
1
S
S
4
6
pin3
PVC
GND
VCC
2
ILA00380
3
1
S
S
4
6
pin3
PVC
GND
VCC
2
ILA00381
3
1
S
S
4
6
CF
VCC
pin7
GND
ACFA-450L08
GND
2
ILA00383
3
1
S
S
4
6
VCC
pin7
2
ILA00384
3
1
S
S
4
pin1
GND
PVC
pin2
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