LA1844

Manufacturer Part NumberLA1844
DescriptionSingle chip tuner IC
ManufacturerSanyo Semiconductor Corporation
LA1844 datasheet
 


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Specifications

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Specifications

Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
V CC max
Allowable power dissipation
Pd max
Operating temperature
Topr
Storage temperature
Tstg
Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended supply voltage
V CC
Operating supply voltage range
V CC op
Electrical Characteristics at Ta = 25°C
FM Mono Characteristics at f C = 10.7MHz, V CC = 5V
Parameter
Symbol
Current drain
I CCO-FM
Demodulator output
V OFM
Total harmonic distortion
THD FM mono
Signal-to-noise ratio
S/N FM
AM rejection ratio
AMR
3dB sensitivity
Vi-limit
SD sensitivity
LED Sens
IF counter buffer output
V IFBuff-FM
Mute attenuation
Mute-Att
FM Stereo Characteristics at f C = 10.7MHz, 100dBµ, V CC = 5V
Parameter
Symbol
Separation
Sep
Stereo on level
ST ON
Total harmonic distortion
THD-main
Adjacent channel rejection ratio 1
BR1
Adjacent channel rejection ratio 2
BR2
Carrier leak
CL
AM Characteristics at f C = 1000kHz, V CC = 5V
Parameter
Symbol
Current drain
I CCO-AM
Detector output
V OAM1
V OAM2
Signal-to-noise ratio
S/N AM1
S/N AM2
Total harmonic distortion
THD AM1
THD AM2
SD sensitivity
SD-Sens
Local oscillator buffer output
V OSC-AM
IF counter buffer output
V IFBuff-AM
LA1844,LA1844M
Conditions
Ta ≤ 45°C
Ta ≤ 80°C
Conditions
Conditions
With no input signal
100dBµ, 100% modulation, fm = 1kHz
100dBµ, 100% modulation, fm = 1kHz
100dBµ, 100% modulation, fm = 1kHz
100dBµ, AM 30% modulation, fm = 1kHz
100dBµ, 100% modulation,
fm = 1kHz output reference, -3dB input
0% modulation
100dBµ
100dBµ, 100% modulation, fm = 1kHz
Conditions
L+R = 90%, Pilot = 10%, fm = 1kHz
Pilot input
Pilot input
fs = 113kHz, Vs = 90%, pilot = 10% :
The left - right modulation, demodulated output
fs = 189kHz, Vs = 90%, pilot = 10% :
The left - right modulation, demodulated output
L+R = 90%, pilot = 10% reference,
pilot = 10% output
Conditions
With no input signal
23dBµ, 30% modulation, fm = 1kHz
80dBµ, 30% modulation, fm = 1kHz
23dBµ, 30% modulation, fm = 1kHz
80dBµ, 30% modulation, fm = 1kHz
80dBµ, 30% modulation, fm = 1kHz
107dBµ, 30% modulation, fm = 1kHz
0% modulation
With no input signal
23dBµ
Ratings
Unit
9
V
400
mW
260
mW
°C
-20 to +80
°C
-20 to +150
Ratings
Unit
5
V
4.3 to 8.0
V
Ratings
Unit
min
typ
max
18
28
38
mA
210
330
420
mVrms
0.35
1.5
%
73
80
dB
47
65
dB
32
40
dBµ
37
47
57
dBµ
200
275
400
mVrms
76
dB
Ratings
Unit
min
typ
max
30
42
dB
1.5
3.5
5.5
%
0.45
1.5
%
36
dB
41
dB
38
44
dB
Ratings
Unit
min
typ
max
11
22
33
mA
40
80
160
mVrms
90
160
230
mVrms
17
23
dB
48
54
dB
0.4
1.1
%
0.5
1.3
%
11
21
31
dBµ
100
140
200
mVrms
140
285
400
mVrms
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