LA1781M_09 Datasheet, PDF (2/48 Pages) Sanyo Semicon Device – For Car Radios Single-Chip Tuner IC

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