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參數(shù)資料
| 型號： | LA1781M |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封裝： | 14 X 14 MM, QIP-64 |
| 文件頁數(shù)： | 12/48頁 |
| 文件大?。?/td> | 508K |
| 代理商： | LA1781M |
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LA1781M
No.6038-2/48
Specifications
Maximum Ratings at Ta = 25
°C
Parameter
Symbol
Conditions
Ratings
Unit
VCC1 max
Pins 6, 40, and 61
9
V
Maximum supply voltage
VCC2 max
Pins 7, 45, 54, 59, and 60
12
V
Allowable power dissipation
Pd max
Ta
≤ 55°C
950
mW
Operating temperature
Topr
-40 to +85
°C
Storage temperature
Tstg
-40 to +150
°C
Operating Conditions at Ta = 25
°C
Parameter
Symbol
Conditions
Ratings
Unit
VCC
Pins 6, 7, 40, 45, 54, 59, 60, and 61
8
V
Recommended supply voltage
VCCST IND
Pin 26
5V
Operating supply voltage range
VCC op
7.5 to 9.0
V
Electrical Characteristics at Ta = 25°C, VCC = 8V, in the specified test circuit for the FM IF input
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
FM characteristics At the FM IF input
Current drain
ICCO-FM
No input, I40 + I45 + I54 + I59 + I60 + I61
60
94
110
mA
Demodulation output
VO-FM
10.7MHz, 100dB
μ, 1kHz, 100%mod, The pin 15 output
205
310
415
mVrms
Pin 31 demodulation output
VO-FM31
10.7MHz, 100dB
μ, 1kHz, 100%mod, The pin 31 output
190
295
380
mVrms
Channel balance
CB
The ratio between pins 15 and 16 at 10.7MHz, 100dB
μ, 1kHz
-1
0
+1
dB
Total harmonic distortion
THD-FM mono
10.7MHz, 100dB
μ, 1kHz, 100% mod, pin 15
0.3
1.0
%
Signal-to-noise ratio : IF
S/N-FM IF
10.7MHz, 100dB
μ, 1kHz, 100% mod, pin 15
75
82
dB
AM suppression ratio: IF
AMR IF
10.7MHz, 100dB
μ, 1kHz, fm = 1kHz, 30% AM, pin 15
55
68
dB
Att-1
10.7MHz, 100 dB
μ, 1kHz. The pin 15
attenuation when V33 goes from 0 to 2V
5
10
15
dB
Att-2
10.7MHz, 100 dB
μ, 1kHz. The pin 15
attenuation when V33 goes from 0 to 2V*
1
15
20
25
dB
Muting attenuation
Att-3
10.7MHz, 100 dB
μ, 1kHz. The pin 15
attenuation when V33 goes from 0 to 2V*
2
28
33
38
dB
Separation
Sep
10.7MHz, 100dB
μ, L + R = 90%, pilot = 10%. The pin 15 output
ratio
30
40
dB
Stereo on level
ST-ON
The pilot modulation such that V26
< 0.5V
2.1
4.1
6.5
%
Stereo off level
ST-OFF
The pilot modulation such that V26
> 3.5V
1.2
3.1
%
Main total harmonic distortion
THD-Main L
10.7MHz, 100dB
μ, L + R = 90%, pilot = 10%. The pin 15 signal
0.3
1.2
%
Pilot cancellation
PCAN
10.7MHz, 100dB
μ, pilot = 10%.
The pin 15 signal/the pilot level leakage. DIN audio
20
30
dB
SNC output attenuation
AttSNC
10.7MHz, 100dB
μ, L - R = 90%, pilot = 10%.
V28 = 3V
→ 0.6V, pin 15
1
5
9
dB
AttHCC-1
10.7MHz, 100dB
μ, 10kHz, L + R = 90%, pilot = 10%.
V29 = 3V
→ 0.6V, pin 15
0.5
4.5
8.5
dB
HCC output attenuation
AttHCC-2
10.7MHz, 100dB
μ, 10kHz, L + R = 90%, pilot = 10%.
V29 = 3V
→ 0.1V, pin 15
6
10
14
dB
Input limiting voltage
VIN-LIM
100dB
μ, 10.7MHz, 30% modulation. The IF input such that the
input reference output goes down by 3dB
33
40
47
dB
μ
Muting sensitivity
VIN-MUTE
The IF input level (unmodulated) when V33 = 2V
27
35
43
dB
μ
SD-sen1 FM
The IF input level (unmodulated) (over 100mV rms)
such that the IF counter buffer output goes on
54
62
70
dB
μ
SD sensitivity
SD-sen2 FM
54
62
70
dB
μ
IF counter buffer output
VIFBUFF-FM
10.7MHz, 100dB
μ, unmodulated. The pin 23 output
130
200
270
mVrms
VSMFM-1
No input. The pin 24 DC output, unmodulated
0.0
0.1
0.3
V
VSMFM-2
50dB
μ. The pin 24 DC output, unmodulated
0.4
1.0
1.5
V
VSMFM-3
70dB
μ. The pin 24 DC output, unmodulated
2.0
2.7
3.5
V
Signal meter output
VSMFM-4
100dB
μ. The pin 24 DC output, unmodulated
4.7
5.5
6.2
V
Muting bandwidth
BW-MUTE
100dB
μ. The bandwidth when V33 = 2V, unmodulated
150
220
290
kHz
Mute drive output
VMUTE-100
100dB
μ, 0dBμ. The pin 33 DC output, unmodulated
0.00
0.03
0.20
V
Continued on next page.
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