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参数资料
| 型号： | LA1781M |
| 元件分类： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封装： | 14 X 14 MM, QIP-64 |
| 文件页数： | 13/48页 |
| 文件大小： | 508K |
| 代理商： | LA1781M |
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LA1781M
No.6038-20/48
Test Conditions
Switch states
Parameter
Symbol
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW10
Current drain
ICCO-FM
ON
b
OFF
b
-
ON
OFF
ON
-
Demodulation output
VO-FM
ON
b
OFF
b
-
ON
OFF
ON
-
Pin 31 demodulation output
VO-FM31
ON
b
OFF
b
-
ON
OFF
ON
-
Channel balance
CB
ON
b
OFF
b
-
ON
OFF
ON
-
Total harmonic distortion (FM)
THD-FM mono
ON
b
OFF
b
-
ON
OFF
ON
-
Signal-to-noise ratio : IF
S/N-FM IF
ON
b
OFF
b
-
ON
OFF
ON
-
AM suppression ratio : IF
AMR IF
ON
b
OFF
b
-
ON
OFF
ON
-
Att-1
ON
b
OFF
b
-
ON
OFF
ON
-
Att-2
ON
b
OFF
b
-
ON
OFF
ON
-
Muting attenuation
Att-3
ON
b
OFF
b
-
ON
OFF
ON
-
Separation
ON
b
OFF
b
-
ON
OFF
ON
-
Stereo on level
ST-ON
ON
b
OFF
b
-
ON
OFF
ON
-
Stereo off level
ST-OFF
ON
b
OFF
b
-
ON
OFF
ON
-
Main total harmonic distortion
THD-Main L
ON
b
OFF
b
-
ON
OFF
ON
-
Pilot cancellation
PCAN
ON
b
OFF
b
-
ON
OFF
OFF/ON
-
SNC output attenuation
AttSNC
ON
b
OFF
b
-
ON
OFF
ON
-
HCC output attenuation 1
AttHCC-1
ON
b
OFF
b
-
ON
OFF
ON
-
HCC output attenuation 2
AttHCC-2
ON
b
OFF
b
-
ON
OFF
ON
-
Input limiting voltage
VIN-LIM
ON
b
OFF
b
-
ON
OFF
ON
Muting sensitivity
VIN-MUTE
ON
b
OFF
b
-
ON
OFF
ON
-
SD sensitivity 1
SD-sen1 FM
ON
b
OFF
b
OFF
ON
-
SD sensitivity 2
SD-sen2 FM
ON
b
OFF
b
ON
OFF
ON
-
IF counter buffer output
VIFBUFF-FM
ON
b
OFF
b
OFF
ON
-
VSM FM-1
ON
b
OFF
b
-
ON
OFF
ON
-
VSM FM-2
ON
b
OFF
b
-
ON
OFF
ON
-
VSM FM-3
ON
b
OFF
b
-
ON
OFF
ON
-
Signal meter output (FM)
VSM FM-4
ON
b
OFF
b
-
ON
OFF
ON
-
Muting bandwidth
BW-MUTE
ON
b
OFF
b
-
ON
OFF
ON
-
Mute drive output
VMUTE-100
ON
b
OFF
b
-
ON
OFF
ON
-
N-AGC on input
VNAGC
ON
a
ON
b
-
ON
OFF
-
W-AGC on input
VWAGC
ON
a
ON
b
-
ON
OFF
-
Conversion gain
A.V
ON
a
ON
b
-
ON
OFF
-
Oscillator buffer output
VOSCBUFF-FM
ON
a
ON
b
-
ON
OFF
-
Gate time 1
τGATE1
ON
-
OFF
a
-
ON
OFF
-
Noise sensitivity
SN
ON
-
OFF
a
-
ON
OFF
-
NC effect
SN-NC
ON/OFF
-
OFF
a
-
ON
OFF
-
MRC output
VMRC
ON
-
OFF
b
-
ON
OFF
-
MRC operating level
MRC-ON
ON
-
OFF
b
-
ON
OFF
-
Practical sensitivity
S/N-30
OFF
-
OFF
b
ON
-
Detection output
VO-AM
OFF
-
OFF
b
ON
-
Pin 31 detection output
VO-AM31
OFF
-
OFF
b
ON
-
AGC F.O.M.
VAGC-FOM
OFF
-
OFF
b
ON
-
Signal-to-noise ratio
S/N-AM
OFF
-
OFF
b
ON
-
Total harmonic distortion (AM)
THD-AM
OFF
-
OFF
b
ON
-
VSM AM-1
OFF
-
OFF
b
ON
-
Signal meter output (AM)
VSM AM-2
OFF
-
OFF
b
ON
-
Oscillator buffer output
VOSCBUFF-AM1
OFF
-
OFF
b
ON
-
W-AGCsen1
OFF
-
OFF
b
ON
-
Wide band AGC sensitivity
W-AGCsen2
OFF
-
OFF
b
ON
-
SD-sen1 AM
OFF
-
OFF
b
OFF
-
SD sensitivity
SD-sen2 AM
OFF
-
OFF
b
OFF
-
IF buffer output
VIFBUFF-AM
OFF
-
OFF
b
OFF
-
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