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參數資料
| 型號： | LA1845NM |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁數： | 3/10頁 |
| 文件大小： | 190K |
| 代理商： | LA1845NM |
Specifications
Maximum Ratings at Ta = 25°C
Operating Conditions at Ta = 25°C
Operating Characteristics at Ta = 25°C, VCC = 8 V, in the specified test circuit.
No. 5888-2/10
LA1845N, 1845NM
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
9
V
Pd max
Ta
≤ 45°C
400
mW
Allowable power dissipation
Pd max
Ta = 80°C (DIP)
400
mW
Pd max
Ta = 80°C (MFP)
260
mw
Operating temperature
Topr
–20 to +80
°C
Storage temperature
Tstg
–40 to +125
°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
8
V
Operating supply voltage range
VCCop
Ta = 80°C
4.3 to 8.5
V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[FM Mono Characteristics] fc = 10.7 MHz, Vi = 100 dB, fm = 1 kHz, Mod = 75 kHz
Current drain
ICCO-FM
With no input signal
20
30
40
mA
Demodulator output
VOFM
100 dB, 100% modulation, fm = 1 kHz
230
360
460
mVrms
Total harmonic distortion
THDFM
100 dB, 100% modulation, fm = 1 kHz
0.35
1.5
%
Signal-to-noise ratio
S/NFM
100 dB, 100% modulation, fm = 1 kHz
73
80
dB
AM rejection ratio
AMR
100 dB, AM 30% modulation, fm = 1 kHz
47
65
dB
3 dB sensitivity
100 dB, 100% modulation, fm = 1 kHz, -3 dB input
32
40
dB
SD sensitivity
0% modulation
38
47
56
dB
IF counter buffer output
VIFBuff-FM
100 dB, the pin 13 output
80
120
160
mVrms
Mute attenuation
Mute-Att
100 dB, 100% modulation, fm = 1 kHz
75
85
dB
[FM Stereo Characteristics] fc = 10.7 MHz, Vi = 100 dB, fm = 1 kHz, L + R = 90%, Pilot = 10%
Separation
SepL
Left channel modulated. The pin 16 output/the pin 17 output
30
42
dB
Stereo on level
STON
The pilot modulation such that V7 falls under 0.7 V
1.5
3.5
5.5
%
Total harmonic distortion
THD-main
Left + right modulation. The pin 16 output.
0.45
1.5
%
fs = 113 kHz, Vs = 90%, pilot = 10%
Adjacent channel rejection ratio 1
Brej-3rd
The left - right modulation, demodulated output
36
dB
fs = 189 kHz, Vs = 90%, pilot = 10%
Adjacent channel rejection ratio 2
Brej-5th
The left - right modulation, demodulated output
41
dB
Carrier leak
L + R = 90%, pilot = 10% reference, pilot = 10% output
38
44
dB
[AM Characteristics] fc = 1000 kHz, Vi = 80 dB, fm = 1 kHz, Mod = 30%
Current drain
ICCO-AM
With no input signal
13
27
39
mA
Detector output 1
VOAM1
23 dB, 30% modulation, fm = 1 kHz
40
80
160
mVrms
Detector output 2
VOAM2
80 dB, 30% modulation, fm = 1 kHz
90
160
230
mVrms
Signal-to-noise ratio 1
S/NAM1
23 dB, 30% modulation, fm = 1 kHz
17
23
dB
Signal-to-noise ratio 2
S/NAM2
80 dB, 30% modulation, fm = 1 kHz
46
52
dB
Total harmonic distortion 1
THDAM1
80 dB, 30% modulation, fm = 1 kHz
0.4
1.1
%
Total harmonic distortion 2
THDAM2
107 dB, 30% modulation, fm = 1 kHz
0.5
1.3
%
SD sensitivity
0% modulation
11
20
29
dB
Local oscillator buffer output
VOSC-AM
With no input signal
100
140
200
mVrms
IF counter buffer output
VIFBuff-AM
23 dB
140
285
400
mVrms
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