LA1787NM
No.A0229-2/6
Specifications
Maximum Ratings at Ta = 25
°C
Parameter
Symbol
Conditions
Ratings
Unit
VCC1 max
Pins 6, 40, and 61
9.0
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
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
VCC
Pins 6, 7, 40, 45, 54, 59, 60, and 61
8.0
V
Recommended supply voltage
VCCST IND
Pins 26
5
V
Operating supply voltage range
VCC op
7.5 to 9.0
V
Operating Characteristics at Ta = 25°C, VCC = 8.0V, in the specified test circuit, FM IF input
* : Note that these tests are made using an IC socket, models IC-51-0644-824 and KS8277 (Yamaichi Electronics Co., Ltd.).
Switch settings
Ratings
Parameter
Symbol
Conditions
123456789
10
min
typ
max
Unit
FM Characteristics - FM IF Input
Quiescent
current
ICCO-FM
No input, I40+I45+I54+I59+I60+I61
ON
B OFF B
ON OFF OFF ON
60
94
110
mA
Demodulated
output
VO-FM
10.7MHz, 100dB
, 1kHz,
100% modulation, the pin 15 output
ON
B OFF B
ON OFF OFF ON
205
310
415 mVrms
Pin 31
demodulated
output
VO-FM31
10.7MHz, 100dB
, 1kHz,
100% modulation, the pin 31 output
ON
B OFF B
ON OFF OFF ON
190
295
380 mVrms
Channel
balance
CB
10.7MHz, 100dB
, 1kHz,
Pins 15, 16 ratio
ON
B OFF B
ON OFF OFF ON
-1
0
+1
dB
Total harmonic
distortion
THD-FMmono 10.7MHz, 100dB
, 1kHz,
100% modulation, pin 15
ON
B OFF B
ON OFF OFF ON
0.3
1
%
Signal-to-noise
ratio (IF)
S/N-FM IF
10.7MHz, 100dB
, 1kHz,
100% modulation, pin 15
ON
B OFF B
ON OFF OFF ON
75
82
dB
AM rejection
ratio (IF)
AMR IF
10.7MHz, 100dB
, 1kHz, fm = 1kHz,
pin 15 when 30% AM
ON
B OFF B
ON OFF OFF ON
55
68
dB
Muting
attenuation (1)
Att-1
10.7MHz, 100dB
, 1kHz,
The pin 15 attenuation when V33 is
changed from 0 to 2V
ON
B OFF B
ON OFF OFF ON
5
10
15
dB
Muting
attenuation (2)
Att-2
10.7MHz, 100dB
, 1kHz,
The pin 15 attenuation when V33 is
changed from 0 to 2V *
1
ON
B OFF B
ON ON OFF ON
15
20
25
dB
Muting
attenuation (3)
Att-3
10.7MHz, 100dB
, 1kHz,
The pin 15 attenuation when V33 is
changed from 0 to 2V *
2
ON
B OFF B
ON ON OFF ON
28
33
38
dB
Separation
10.7MHz, 100dB
, L+R = 90%,
pilot = 10%, the pin 15 output ratio
ON
B OFF B
ON OFF OFF ON
30
40
dB
Stereo on level
ST-ON
The pilot modulation such that V26 is
less than 0.5V
ON
B OFF B
ON OFF OFF ON
2.1
4.1
6.1
%
Stereo off level
ST-OFF
The pilot modulation such that V26 is
less than 3.5V
ON
B OFF B
ON OFF OFF ON
1.3
3.2
%
Main distortion
THD-Main L
10.7MHz, 100dB
, L+R = 90%,
pilot = 10%, pin 15
ON
B OFF B
ON OFF OFF ON
0.3
1.2
%
Pilot
cancellation
PCAN
10.7MHz, 100dB
, pilot = 10%,
Pin 15 signal
The pilot level leakage, DIN audio
ON
B OFF B
ON OFF OFF OFF
/ON
20
30
dB
SNC output
attenuation
AttSNC
10.7MHz, 100dB
, L-R = 90%,
pilot = 10%, V28 = 3V
→0.6V, pin 15
ON
B OFF B
ON OFF OFF ON
1
5
9
dB
Continued on next page.