Ordering number : ENN6568
Monolithic Linear IC
LA1833N, 1833NM
System-on-Chip Tuner IC for Home Stereo Systems
Overview
The LA1833N/NM is an AM/FM IF and MPX system-on-
chip IC that supports electronic tuning for home stereo
systems. It is optimal for use in auto-seek systems that use
SD (station detect) and IF counting in parallel.
— FM total harmonic distortion detuning
characteristics and signal-to-noise ratio improved
over those of the LA1833
Package Dimensions
unit: mm
3112A-MFP24S
[LA1833N]
24
13
Functions
• AM: RF amplifier, mixer, oscillator, IF amplifier,
detector, AGC, SD, oscillator buffer, IF buffer, and
stereo IF output
• FM IF: IF amplifier, quadrature detector, S meter, SD,
S-curve detector, IF buffer
• MPX: PLL stereo decoder, stereo indicator, forced
mono, VCO stop, audio muting, adjacent channel
interference reduction function, pilot canceller
5.4
12.5
0.15
Features
• Improvements over the LA1832
— The MPX VCO circuit has been integrated on the
same IC (no ceramic element required)
— Built-in adjacent channel interference reduction
function (114 kHz, 190 kHz)
— Built-in pilot canceler function (19 kHz)
— AM and FM output levels can be set independently
— Improved FM reception characteristics (IF beating
improved)
• Other features
— Pin arrangement nearly identical to that of the
LA1832
— AM coil specifications can be the same as those used
for the LA1832.
— ST operating dynamic range improved over that of
the LA1833
0.35
1.0
SANYO: MFP24S (300 mil)
unit: mm
3067A-DIP24S
[LA1833NM]
21.0
24
13
7.62
6.4
0.1 1.5
(0.75)
0.63
1
12
1.7max
7.6
1
0.9
12
(0.71)
1.78
0.48
0.95
SANYO: DIP24S (300 mil)
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 Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
D1500RM (OT) No. 6568-1/10
0.51min
3.3 3.9max
(3.25)
0.25
LA1833N, 1833NM
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
V
CC
max
(LA1833N)
Allowable power dissipation
Pd max
(LA1833NM) (Ta
≤
45°C)
(LA1833NM) (Ta = 70°C)
Operating temperature
Storage temperature
Topr
Tstg
Conditions
Ratings
9
400
400
270
–20 to +70
–40 to +125
Unit
V
mW
mW
mW
°C
°C
Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
V
CC
V
CC
op
Conditions
Ratings
5
4 to 8
Unit
V
V
Electrical Characteristics
at V
CC
= 5 V, in the specified test circuit
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
[FM Mono Characteristics: fc = 10.7 MHz, fm = 1 kHz]
Current drain
Demodulator output
Channel balance
Total harmonic distortion (mono)
Signal-to-noise ratio
AM rejection ratio
Input limiting voltage
SD LED on sensitivity
IF counter buffer output
Muting attenuation
I
CCO
-FM
V
O
-FM
C.B-mono
THD-FM
S/N-FM
AMR
–3dBL. S
SD-On-FM
V
IFBuff
-FM 100 dBµ, the pin 10 output
Mute Att
100 dBµ, 100% mod. fm = 1 kHz
No input
100 dBµ, 100% mod. The pin 13 output
100 dBµ, 100% mod.
The ratio (pin 13 output)/(pin 14 output)
100 dBµ, 100% mod. The pin 13 output
100 dBµ, 100% mod. The pin 13 output
100 dBµ, AM = 30% mod. fm = 1 kHz
100 dBµ, 100% mod. The pin 13 output
Referenced to the output, when the input is down by –3 dB
32
200
70
45
18
210
–1.5
28
330
0
0.5
78
63
34
42
275
76
42
52
400
38
420
1.5
1.5
mA
mVrms
dB
%
dB
dB
dBµ
dBµ
mVrms
dB
[Stereo Characteristics: fc = 10.7 MHz, 100 dBµ, fm = 1 kHz, L + R = 90%, pilot = 10%]
Separation
Stereo on level
Total harmonic distortion (main)
Adjacent channel interference
rejection ratio
Adjacent channel interference
rejection ratio
Carrier leakage
Sep
ST-on
Left channel modulated,
the ratio (pin 13 output)/(pin 14 output)
The pilot modulation level such that V7 becomes
less than 0.7 V
28
1.5
42
3.5
0.7
36
41
38
44
5.5
1.5
dB
%
%
dB
dB
dB
THD-main L + R modulation, the pin 13 output
Brej-3rd
Brej-5th
CL
fs = 113 kHz, Vs = 90%, Pilot = 10%; the pin 13 output
with respect to an L – R modulated 1 kHz demodulator output
fs = 189 kHz, Vs = 90%, Pilot = 10%; the pin 13 output
with respect to an L – R modulated 1 kHz demodulator output
L + R = 90%, De-emph asis 50 µs, Pilot = 10%
[AM Characteristics: fc = 1000 kHz, fm = 1 kHz]
Current drain
Detector output
Detector output
Signal-to-noise ratio
I
CCO
-AM
No input
11
40
90
16
48
22
80
160
21
54
0.4
0.5
14
140
140
24
200
285
400
1.1
1.3
34
33
160
230
mA
mVrms
mVrms
dB
dB
%
%
dBµ
mVrms
mVrms
V
O
-AM (1) 23 dBµ, 30% modulation. The pin 13 output
V
O
-AM (2) 80 dBµ, 30% modulation. The pin 13 output
S/N-AM (1) 23 dBµ, 30% modulation. The pin 13 output
S/N-AM (2) 80 dBµ, 30% modulation. The pin 13 output
THD-AM (1) 80 dBµ, 30% modulation. The pin 13 output
THD-AM (2) 100 dBµ, 30% modulation. The pin 13 output
SD-On-AM
V
OSC
-AM No input, the pin 24 output
V
IFBuff
-AM 80 dBµ, no modulation, the pin 10 output
Total harmonic distortion
SD LED on sensitivity
Local oscillator buffer output
IF counter buffer output
No. 6568-2/10
LA1833N, 1833NM
Pin Descriptions
Pin No.
Pin
Voltage (V)
Functional description
Equivalent circuit
1
1
FM IF input
Vreg
The input impedance, r
i
, is 330
Ω
3
ILA00220
2
2
AM MIX output
V
CC
The mixer coil is connected between pins
2 and 9
ILA00221
3
3
REG
2.1
Vreg = 2.1 V
ILA00222
4
4
AM IF input
Vreg
The input impedance, ri, is 2 kΩ
ILA00223
5
GND
0
6
7
Tu-LED
6
7
ST-LED
Also functions as the
AM stereo IF output
V
CC
These are active-low open-collector
outputs.
Set up the current flowing in to these pins
to exceed 100 µA.
ILA00224
Recommended ceramic discriminators
8
FM-DET
V
CC
– 2.1
FCD1070MA11UK2L (TDK)
CDA10.7MG86N (Murata Mfg. Co., Ltd.)
8
ILA00225
9
V
CC
5.0
AM/FM IF counter
output
10
Also functions as a
control switch
Also functions as the
muting switch
0
V10
≤
0.5 V: Reception state (normal)
1.4 V
≤
V10
≤
2.2 V: Muting on state.
V10
≥
3.5 V: Muting on and IF counter on
(seek state).
ILA00226
10
Continued on next page.
No. 6568-3/10
LA1833N, 1833NM
Continued from preceding page.
Pin No.
Pin
Voltage (V)
Functional description
Equivalent circuit
11
Phase comparator
filter connection
11
Also functions as the
FM/AM switching
input
V
CC
– 1.0
The IC switches to AM mode if a current in
excess of 200 µA flows from this pin
ILA00227
Pilot detector filter
connection
12
Also functions as the
forced mono setting
Also functions as the
VCO stop control
V
CC
– 1.0
12
The IC switches to forced mono mode if a
current in excess of 50 µA flows from this
pin.
The VCO circuit is stopped if a current in
excess of 200 µA flows from this pin.
ILA00228
13
14
Left output
Right output
1.8
The output impedance, r
o
, is 3.3 kΩ
13
(
14
)
ILA00229
15
15
Pilot canceller output
Vreg
3
ILA00230
16
Decoder input
Vreg
Inverting input
RNF = 20 kΩ
16
RNF
ILA00231
17
17
PLL input
Vreg
The input impedance, r
i
, is 20 kΩ
ILA00232
18
The output impedance, r
o
, is 2.3 kΩ.
18
FM demodulator output
Vreg
The separation can be adjusted by
changing the value of the capacitor
connected between this pin and ground.
ILA00233
100V
0 (FM)
1.5 (AM)
19
AM detector output
The output impedance, r
o
, is 10 kΩ
19
ILA00234
Continued on next page.
No. 6568-4/10
LA1833N, 1833NM
Continued from preceding page.
Pin No.
Pin
Voltage (V)
Functional description
Equivalent circuit
S meter
20
Also functions as the
AM AGC
Internal load resistor R = 13.9 kΩ.
0.2 (FM)
0.9 (AM)
The SD response speed during seek
operations is set by the value of the
external capacitor connected to pin 20.
20
R
ILA00235
21
21
AM RF-IN
Vreg
Pin 21 and pin 22 (the AFC voltage) are
used at the same potential
ILA00236
22
AFC
Vreg
The FM SD bandwidth can be adjusted by
an external resistor connected between
pin 22 and pin 3 (the regulator voltage).
Note: A bandwidth of 180 kHz or higher is
appropriate for the FM SD bandwidth.
22
ILA00237
23
The oscillator coil is connected between
pin 23 and pin 9 (the V
CC
voltage).
23
OSC
V
CC
Note: The oscillator coil impedance
(secondary side) must be at least
5 kΩ.
ILA00238
Oscillator buffer
24
Also functions as the
FM SD adjustment
V
CC
– 1.4
The FM SD sensitivity can be adjusted
with an external resistor on pin 24.
R = 200
Ω
Note: The resistance of the pin 24 external
resistor must be at least 3.3 kΩ.
R
24
ILA00239
No. 6568-5/10
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