Ordering number : EN5734
Monolithic Linear IC
LA75691
IF Signal-Processing IC for PAL/NTSC Multichannel
Audio TV and VCR Systems
Overview
The LA75691 is a PAL/NTSC multichannel audio
VIF/SIF signal-processing IC that makes the minimum
number of adjustments possible. The system is designed
so that VCO adjustment makes AFT adjustment
unnecessary, thus simplifying the adjustment steps in end-
product manufacturing. PLL detection is adopted in the
FM detector, allowing the LA75691 to support
multichannel detection for the audio signal. In addition, it
also incorporates a buzz canceller that suppresses Nyquist
buzz for improved audio quality.
Package Dimensions
unit: mm
3067-DIP24S
[LA75691]
Functions
[VIF Block]
• PLL detector with minimum number of adjustments
• AFT
• Equalizer amplifier
• RF AGC
[First SIF BLOCK]
• First SIF detector
• HPF
[SIF Block]
• PLL-based FM detector
[Muting Block]
• AV muting
SANYO: DIP24S
Features
• Excellent buzz and buzz/beating characteristics provided
by a PLL detection technique that includes a buzz
canceller.
• The second IF AGC filter is built in.
• No coils are used in the AFT and SIF circuits, making
them adjustment free.
Allowable power dissipation, Pd max — W
Ambient temperature, Ta — °C
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
90898RM (OT) No. 5734-1/13
LA75691
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Circuit voltage
Symbol
V
CC
max
V13, V17
I6
Circuit current
I10
I24
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Tstg
Ta
≤
68°C
Conditions
Ratings
13.2
V
CC
–3
–10
–2
720
–20 to +70
–55 to +150
Unit
V
V
mA
mA
mA
mW
°C
°C
Note: When mounted on a 65
×
72
×
1.6 mm laminated paper phenolic resin printed circuit board.
Operating Conditions
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
V
CC
V
CC
op
Conditions
Ratings
9
8.5 to 12.5
Unit
V
V
Operating Characteristics
at Ta = 25°C, V
CC
= 9 V, f
P
= 38.9 MHz
Parameter
[VIF Block]
Circuit current
Maximum RF AGC voltage
Minimum RF AGC voltage
Input sensitivity
AGC range
Maximum allowable input
No-signal video output voltage
Synchronizing signal tip voltage
Video output level
Black noise threshold voltage
Black noise clamp voltage
Video signal-to-noise ratio
C-S beating
Frequency characteristics
Differential gain
Differential phase
Maximum AFT voltage
Minimum AFT voltage
AFT detection sensitivity
VIF input resistance
VIF input capacitance
APC pull-in range (U)
APC pull-in range (L)
AFT frequency tolerances 1
VCO1 maximum variability range (U)
VCO1 maximum variability range (L)
VCO control sensitivity
5.5 MHZ output level
[SIF Block]
Limiting voltage
FM detector output voltage
AM rejection ratio
Total harmonic distortion
SIF signal-to-noise ratio
Vi (lim)
V
O
(FM)
AMR
THD
S/N (FM)
57
5.5 MHz ± 30 kHz
5.5 MHz ± 30 kHz
AM = 30 %
43
720
50
48
900
60
0.3
62
0.8
53
1100
dBµV
mVrms
dB
%
dB
I
5
V
14H
V
14L
V
IN
G
R
V
IN
max
V
6
V
6
tip
V
O
V
BTH
V
BCL
S/N
IC-S
f
C
DG
DP
V
13H
V
13L
Sf
Ri
Ci
f
PU
f
PL
dfa 1
dfu
dfl
B
S
O
P/S = 14 dB
1.4
92
–300
1.0
38.9 MHz
38.9 MHz
0.8
8.5
0
22.4
6 MHz
S1 = Off
24
62
92
3.5
1.15
1.7
0.5
2.5
48
38
–3.0
35.5
7.5
42.0
8.1
0
30
68
97
3.8
1.45
2.0
0.8
2.8
50
43
–1.5
3.0
3
8.7
0.18
28.0
1.5
3
1.3
–1.5
0
1.3
–1.5
2.8
95
–1.0
5.6
98
–0.8
+300
6.5
5
9.0
0.5
33.6
4.2
1.74
2.3
1.1
3.1
0.5
36
48.5
V
V
V
dBµV
dB
dBµV
V
V
Vp-p
V
V
dB
dB
dB
%
deg
V
V
mV/kHz
kΩ
pF
MHz
MHz
kHz
MHz
MHz
kHz/mV
mVrms
Symbol
Conditions
Ratings
min
typ
max
Unit
No. 5734-2/13
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