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参数资料
| 型号： | LA1862M |
| 元件分类： | 接收器 |
| 英文描述： | FM, AUDIO DEMODULATOR, PDSO36 |
| 封装： | MFP-36 |
| 文件页数： | 12/27页 |
| 文件大小： | 810K |
| 代理商： | LA1862M |
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Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
8.5
V
Operating supply voltage range
VCC op
7.5 to 10
V
Operating Characteristics at Ta = 25°C, VCC = 8.5 V, f = 10.7 MHz, unless otherwise noted SW-1
is off.
Parameter
Symbol
Conditions
min
typ
max
Unit
Quiescent current
ICCO
No input signal
45
70
mA
Current drain
ICC-100
VIN = 100 dBμ
47
72
mA
Demodulator output voltage
VO
VIN = 100 dBμ,f=1 kHz,
100% modulation, pin 15 output
225
350
495
mVrms
Total harmonic distortion
THD 1
Mono, VIN = 100 dBμ,f=1 kHz,
100% modulation, pin 15 output
0.3
1.2
%
THD 2
Stereo (L + R),
VIN = 100 dBμ,f=1 kHz,
100% modulation, pin 15 output
0.3
1.2
%
Signal-to-noise ratio
S/N
VIN = 100 dBμ,f=1 kHz,
100% modulation
64
71
dB
Input limiting voltage
VIN lim
VIN = 100 dBμ reference, 3 dB audio output
attenuation, IF input level, soft muting ON
32
41
50
dBμ
Muting attenuation (1)
Mute Att
V5 = 5 V, VIN = 100 dBμ,f=1 kHz,
100% modulation
21
25
29
dB
Muting attenuation (2)
Mute Att
V5 = 2 V, VIN = 100 dBμ,f=1 kHz,
100% modulation
510
15
dB
Muting bandwidth
BW Mute
VIN = 100 dBμ, V5 = 2 V
135
200
305
kHz
AM rejection ratio
AMR
VIN = 100 dBμ, 400 Hz, 100% modulated FM
carrier. 1 kHz, 30% modulated AM interference
signal
47
60
dB
Muting drive output voltage
V5-0
No input signal
3.5
4.7
V
V5-100
VIN = 100 dBμ
00.3
S-meter output voltage
V1-0
No input signal
0.1
0.5
V
V1-50
VIN =50dBμ
1.1
1.9
2.7
V
V1-100
VIN = 100 dBμ
5.4
6.4
7.4
IF COUNT output sensitivity
IF input level at IF COUNT ON. SW-1 is ON.
44
53
62
dBμ
IF buffer output voltage
VIF-ON
VIN = 100 dBμ. SW-1 is ON.
200
300
480
mVrms
Input impedance
Zin
f = 1 kHz
20
k
Ω
Output noise voltage
VNO
Pin26connectedtoground
27
μV
Gate time
tgate
VIN = 100 mVp-p, 1 μs pulsewidth, f = 1 kHz
13
23
35
μs
Noise sensitivity
SN
VIN =1 μs pulsewidth, f = 1 kHz
35
mVp-o
Channel separation
Sep
f = 1 kHz, 90% L+R signal modulation. 10% pilot
signal modulation, IHF bandpass filter.
36
50
dB
Stereo indicator threshold level
Pilot signal level when the LED turns ON.
1.0
2.5
5.0
%
Stereo indicator hysteresis
hy
LED ON level - LED OFF level
3.2
6.5
dB
Capture range
C.R
CR =
| (f – 456)/456 x 100 |±1.2
%
SCA rejection ratio
SCA rej
90% L + R signal modulation. 10% pilot signal
modulation. 67 kHz, 10% modulated SCA signal
75
dB
SNC output attenuation
AttSNC
V14 = 0.6 V, 90% L – R signal modulation. 10%
pilot signal modulation
–12.0
–7.5
–3.0
dB
SNC output voltage
VOsub
V14 = 0.1 V, 90% L – R signal modulation. 10%
pilot signal modulation
5mV
High-out control attenuation
AttHCC1
V13 = 0.6 V, 90% L + R signal modulation. 10%
pilot signal modulation
–15
–5
0
dB
AttHCC2
V = 1.1 V, 90% L + R signal modulation. 10% pilot
signal modulation
–2.0
0
dB
Ripple rejection
Rr
f = 50 Hz, V = 100 mVrms
27
dB
Channel balance
CB
| Pin 15 output – pin 16 output |
01.5
dB
Pilot signal attenuation
Left channel adjusted and measured
DIN audio filter. See Note.
15
22
dB
Stereo indicator LED current
Minimum stereo drive current
1.0
mA
Pin 25 saturation voltage
IL =10mA
1.0
V
Note: When a filter is not specified, connect an IHF bandpass filter to the MPX outputs.
LA1862M
No. 4092- 2/27
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