AM/FM-IF/MPX Tuner System for
Radio-Cassette Recorders, Music Centers
Overview
The LA1806 is a characteristics-improved version of the
LA1811, with the same pin assignment and package as those of
the LA1811. Improvements are made on the following points:
.
Separation (35 dB
48 dB) and its dependence on
free-running frequency (Refer to the separate catalog of the
LA1805.)
.
FM main distortion (0.8%
0.45%)
.
AM detection output (approximately 5 dB increased)
The constants on five external parts are changed as LA1811
Functions
.
FM-IF: IF amplifier quadrature detector, soft muting, tuning
indicator
.
MPX:
PLL stereo decoder, stereo indicator, forced
monaural, VCO stop
.
AM:
RF amplifier, MIX, OSC (with ALC), IF amplifier,
detector, AGC, tuning indicator
Features
.
FM/AM/MPX functions contained on a single chip
.
Minimum number of external parts required
.
On-chip FM muting function
.
High sensitivity
.
Less carrier leak of MPX
Package Dimensions
unit : mm
3067-DIP24S
[LA1806]
SANYO : DIP24S
Specifications
Maximum Ratings at
Ta = 25C, See specified Test Circuit
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
Pins 3, 7, 8, 11, 20, 21
9
V
Maximum supply current
I
CC
max
Pins 3 + 20 + 21
50
mA
Flow-in current
(Indicator drive current)
I
LED
Pins 7, 8
20
mA
Flow-out current
I
23
Pin 23
0.1
mA
Allowable power dissipation
Pd max
Ta
%
70C
500
mW
Operating temperature
Topr
20 to +70
C
Storage temperature
Tstg
40 to +125
C
Ordering number: EN3210A
Monolithic Linear IC
LA1806
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13097HA(II)/N149TA,TS No.3210-1/4
Opearating Conditions
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
4.5
V
Operating voltage range
V
CC
op
3.0 to 8.0
V
* The FM output level forms an N curve (LA1805) and an S curve (LA1806).
LA1805: N curve (for US band)
LA1806: S curve (for Japanese band). Since an output load resistor is connected to pins 9, 10 externally, your desired output
level can be set by varrying the output resistance.
Operating Characteristics
at Ta = 25C, V
CC
= 4.5 V, See specified Test Circuit.
Parameter
Symbol
Conditions
min
typ
max
Unit
FM characteristics (Mono): f
c
= 10.7 MHz, f
m
= 1 kHz
Quiescent current
I
CCO
No input
13
20
mA
3 dB sensitivity
3dBL.S.
Referenced to V
IN
= 100 dB, 100%, down 3 dB
28
35
dB
Demodulation output
V
0
V
IN
= 100 dB, 100% mod.
154
226
308
mV
Channel balance
C.B.
V
IN
= 100 dB, 100% mod.
0
0
1.5
dB
Total harmonic distortion
THD
V
IN
= 100 dB, 100% mod.
0.45
1.2
%
Signal to noise ratio
S/N
V
IN
= 100 dB, 100% mod.
70
80
dB
LED ON sensitivity
V
LED
I
L
= 1 mA
23
33
43
dB
FM Characteristics (Stereo) : f
c
= 10.7 MHz, f
m
= 1 kHz, L + R = 90%, pilot = 10%, V
IN
= 100 dB
Separation
Sep
32
48
dB
Stereo distortion
THD (MAIN)
0.45
1.2
%
LED ON level
V
LED
-on
2.4
3.9
5.4
%
LED OFF level
V
LED
-off
2.7
%
AM Characteristics: f
c
= 1000 kHz, f
m
= 1 kHz
Quiescent current
I
CCO
No input
9.5
14.5
mA
Detection output
V
O
1
V
IN
= 23 dB, 30% mod.
29
54
97
mV
V
O
2
V
IN
= 80 dB, 30% mod.
78
126
193
mV
Signal to noise ratio
S/N1
V
IN
= 23 dB, 30% mod.
17
21
dB
S/N2
V
IN
= 80 dB, 30% mod.
50
55
dB
Total harmonic distortion
THD1
V
IN
= 80 dB, 30% mod.
0.45
1.2
%
THD2
V
IN
= 100 dB, 30% mod.
0.6
1.5
%
LED ON sensitivity
V
LED
I
L
= 1 mA
Note : Be fully careful of dielectric breakdown.
16
24
32
dB
Note : For further details, refer to the separate catalog of the LA1805.
LA1806
No.3210-2/4
Equivalent Circuit Block Diagram
5
:Not required for the LA1805
Unit (resistance:
)
LA1806
No.3210-3/4
Test Circuit
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of January, 1997. Specifications and information herein are subject to change without notice.
x
Polystyrene film capacitor
Note: The constants of parts
*
1 to
*
5 are changed from those
of the LA1811.
5
:Not required for the LA1805
Unit (resistance:
,capacitance: F)
LA1806
No.3210-4/4
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