LA75505M [ETC]
;
ETC 
Ordering number : ENN*6930
Monolithic Linear IC
LA75505M
Adjustment Free VIF/SIF Signal Processing IC
for TV/VCR
Preliminary
Overview
Package Dimensions
The LA75505M is a VIF/SIF signal processing IC for
NTSC TV/VCR. It supports the 45.75 MHz and 58.75
MHz as the IF frequencies. On-chip sound carrier trap and
sound carrier BPF circuits make it ideal for compact and
light-weight tuner applications. To adjust the VCO circuit,
AFT circuit, and sound filter, 4-MHz external crystal or 4-
MHz external signal is needed.
unit: mm
3112-MFP24S
[LA75505M]
24
13
Functions
• VIF amplifier
• VCO adjustment free PLL detection circuit
• Digital AFT circuit
1
12
0.15
12.6
• RF AGC
• Buzz canceller
0.35
1.0 0.8
• Equalizer amplifier
SANYO: MFP24S (300 mil)
• Internal sound carrier BPF
• Internal sound carrier trap
• PLL-FM detector
• Reference oscillation circuit
Features
• Internal VCO adjustment free circuit eliminating need
for VCO coil adjustments.
• Considerably reduces the number of required peripheral
parts by providing on-chip sound carrier BPF and sound
carrier trap circuits.
• Use of digital AFT eliminates problem of AFT
tolerance.
• Package: MFP24S (300 mil)
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 Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
41301RM (OT) No. 6930-1/13
LA75505M
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
Conditions
Ratings
Unit
V
V
CC max
Pd max
Topr
7
Ta ≤ 70°C (*Mounted on a printed circuit board)
470
–20 to +70
–55 to +150
mW
°C
Tstg
°C
Note: * Circuit board dimensions: 114.3 × 76.1 × 1.6 mm3, material: glass epoxy
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Operating voltage range
Symbol
VCC
Conditions
Ratings
5
Unit
V
V
CC op
4.5 to 5.5
V
Electrical Characteristics at Ta = 25°C, V = 5.0 V, fp = 45.75 MHz
CC
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
[VIF Block ]
Circuit current
I17
V14H
V14L
Vi
64.0
73.6
mA
V
Maximum RF AGC voltage
Minimum RF AGC voltage
Input sensitivity
Collector load 30 kΩ VC2 = 9 V
8.5
9
0.3
39
—
0.7
45
V
33
58
dBµV
dB
dBµV
V
AGC range
GR
Maximum allowable input
No-signal video output voltage
Synchronizing signal tip voltage
Video output level
Vimax
V4
92
97
3.6
1.3
2.0
50
3.3
1.0
1.7
46
3.9
1.6
2.3
V4tip
VO
V
Vpp
dB
dB
%
Video signal-to-noise ratio
C-S beating
S/N
IC-S
DG
P/S = 10 dB
Vin = 80 dBµ
26
32
38
10
Differential gain
3
Differential phase
DP
2
10
deg
kΩ
PF
V
VIF input resistance
Ri
2.5
3
3.0
6
VIF input capacitance
Maximum AFT voltage
Minimum AFT voltage
AFT tolerance 1
Ci
V13H
V13L
dfa1
dfa2
Sf
4.3
0
4.7
0.2
±35
±45
80
5.0
0.7
±45
±70
V
f = 45.75 MHz
kHz
kHz
AFT tolerance 2
f = 58.75 MHz
AFT detection sensitivity
AFT dead zone
RL = 100 kΩ//100 kΩ
40
120 mV/kHz
fda
60
100
kHz
MHz
MHz
MHz
MHz
APC pull-in range (U)
APC pull-in range (L)
VCO maximum frequency range (U)
VCO maximum frequency range (L)
VCO control sensitivity
N trap1 (4.75 MHz)
fpu
1.0
1.0
1.5
1.5
2.0
–30
–19
10
1.5
1.5
2.0
2.0
4.0
–35
–24
40
fpl
dfu
dfl
β
8.0 kHz/mV
NT1
NT2
NGD1
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
dB
dB
N trap2 (5.25 MHz)
Group delay 1 NTSC (3.0 MHz)
Group delay 1-1 NTSC (3.5 MHz)
70
ns
ns
NGD1-1 wrt 1 MHz
70
120
170
Continued on next page.
No. 6930-2/13
LA75505M
Continued from preceding page.
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
[1st SIF Block]
Conversion gain
Vg
So
fp = 4.5 MHz, Vi = 500µV
26
32
100
106
5.0
3
dB
mVrms
dBµV
kΩ
SIF carrier output level
First SIF maximum input
First SIF input resistance
First SIF input capacitance
[SIF Block]
Vi = 10 mV
So ±2 dB
Simax
Ris
6.0
Cis
6
pF
Limiting sensitivity
Vi(lim)
Vo(FM)
AMR
61
dBµV
mVrms
dB
fp = 4.5 MHz, ∆F = ±25 kHz at 400 Hz
FM detector output voltage
AM rejection ratio
480
50
600
60
750
AM = 30% at 400 Hz
Total harmonic distortion
FM detector output S/N
BPF 3-dB bandwidth
NTSC de-emphasis
THD
f = 4.5 MHz, ∆F = ±25 kHz
0.5
1.0
%
S/N(FM)
BW
55
60
dB
±100
–3
kHz
dB
Ndeem fm = 2 kHz
[Others]
4-MHz level (during external input)
IF system SW threshold resistance
Split/inter SW
X4MIN
V12
Terminated
86
dBµ
kΩ
V
270
V16
0.5
No. 6930-3/13
LA75505M
System Switching
• IF system switch
45.75 MHz is selected as the IF frequency by leaving pin 12 (crystal oscillation) open. 58.75 MHz is selected by
adding 220 kΩ between pin 12 and GND.
• Split/inter carrier switch
Inter carrier is selected by setting the first SIF input (pin 16) to GND.
Pin Assignment
1
2
3
24
23
22
21
20
19
18
17
16
15
14
13
SIF INPUT
FM FILTER
1st SIF OUT
VIDEO DET OUT
EQ OUT
FM DET OUT
RF AGC VR
SIF PLL FILTER
FILTER CONTROL CAPACITOR
VIF INPUT
4
5
6
APC FILTER
FLL FILTER
VCO COIL
VIF INPUT
LA75505M
7
8
GND
VCC
9
VCO COIL
1st SIF INPUT
IF AGC FILTER
RF AGC OUT
AFT OUT
10
11
12
SIF AGC FILTER
NC
REF OSC
Top view
No. 6930-4/13
LA75505M
Test Circuit
Input Impedance Measuring Circuit (VIF, First SIF input impedance)
Impedance analyzer
VIF INPUT
1st SIF INPUT
V
CC
+
24 23 22 21 20 19 18 17 16 15 14 13
LA75505M
1
2
3
4
5
6
7
8
10 11 12
9
Top view
No. 6930-5/13
LA75505M
Pin Functions
Pin No.
Pin
Pin Function
Internal Circuit
Inputs the SIF signal from the first SIF output.
1
SIF INPUT
Set the input level to 90 dBµV or lower because of
the dynamic range of the internal filter.
This is the FM feedback filter pin. It is composed of
a C and R filters.
1 µF is normally used as the capacitance.
If the capacitance is a low value, the audio output
level is small at low frequencies.
2
FM FILTER
Moreover, the audio output level can be made
smaller by increasing the resistance connected in
series.
Use a resistance of 3 kΩ or higher.
This is the first SIF output.
In case of inter carrier, the chroma carrier is bigger
than split carrier applications, so that it is
recommended to connect a filter externally.
1st SIF OUT
3
Filter example
Continued on next page.
No. 6930-6/13
LA75505M
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Pin 4 is the video output pin.
The EQ amplifier can be thought of as shown
below.
4
5
VIDEO-OUT
EQ-OUT
Therefore, the peak gain of the EQ amplifier is
determined by Av = 1 + R/Z.
However, note that the LA75505M being an IC with
VCC = 5 V, setting too large an amplitude causes
distortion in the VCC side. Use so that the white
level is 4 V or less.
Pin 6 is the PLL detector APC filter pin.
Normally the following are used:
R = 330 Ω
C1 = 0.47 µ to 1 µF
C2 = 100 pF
C1 = 1 µF is effective for the overmodulation
characteristics.
When the PLL is locked, the signal passes via the
path marked A in the figure, and when PLL is
unlocked and in weak signal, the signal passes via
the path marked B in the figure. The PLL loop gain
can thus be switched in this manner.
Time
constant switch
6
7
APC FILTER
FLL FILTER
output
Pin 7 is a VCO automatic control FLL filter pin.
Since it operates always on a small current, using a
larger capacitance results in a slower response.
Normally, a capacitance between 0.47 µF and 1 µF
is used.
Moreover, the control range for this pin is between
about 3 V to 4.7 V. Since this range is determined
when adjusting the VCO tank circuit, set the design
center of L and C of VCO so that the voltage of pin
7 is 3.6 V.
output
This is the VCO tank circuit for the PLL detector.
Use a tuning capacitance of 24 pF.
For the L and C specifications, use IF45.75 MHz
specifications within ±1.5%, and 58.75 MHz
specifications within ±1%. Also, design the L and C
values so that the voltage of pin 7 is 3.6 V when
PLL is locked while using the IF center frequency.
8
9
VCO COIL
Continued on next page.
No. 6930-7/13
LA75505M
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Pin 10 is the SIF AGC filter pin. Use a capacitance
of 0.01 µF to 0.1 µF.
SIF AGC FILTER
10
10
11
NC
Not connected
This pin can be used both as the crystal resonator
pin and IF switch.
The 58.75-MHz mode is selected by inserting 220
kΩ between pin 12 and GND, the 45.75 MHz mode
by leaving the pin open.
REF OSC
12
4-MHz input is possible from this pin.
In the case of 4-MHz external input, input 86 dBµ
or more.
Pin 13 is the AFT output pin.
Use external resistors of 47 kΩ and a filter
capacitance 0.1 µF.
The AFT circuit generates the AFT voltage by
comparing the signal obtained by dividing the
4-MHz reference frequency with the signal obtained
by dividing VCO.
Since it uses a digital phase comparator, a dead
zone exists in the AFT center.
13
AFT OUT
waveform
Continued on next page.
No. 6930-8/13
LA75505M
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Pin 14 is the RF AGC output.
RF AGC max is determined by R1 and R2.
RF AGC min is determined by R3 and R4.
Capacitor C1 prevents oscillation and capacitor C2
is the RF AGC filter.
14
RF AGC OUT
Normally 30 kΩ is used for R1, but if the tuner's F/E
transistor is GaAS, the gate's impedance is lower,
so use approx. 10 kΩ.
Pin 15 is the IF AGC filter pin.
Normally, 0.01 µF to 0.02 µF polyester film
capacitor is used.
15
IF AGC FILTER
Determine the impedance based on H-SAG and
AGC speed.
Pin 16 can be used both as the First SIF IN and
inter/split switch pins.
In the case of inter carrier, connect pin 16 to GND.
When a sound saw filter is added, the matching
loss can be decreased by inserting L to neutralize
the IC input capacitance and saw filter output
capacitance.
16
1st SIF INPUT
Continued on next page.
No. 6930-9/13
LA75505M
Continued from preceding page.
Pin No.
17
Pin
Pin Function
Internal Circuit
Connect the decoupling capacitor as close as
possible.
VCC
18
GND
Pins 19 and 20 are VIF input pins.
To reduce the loss of signal through a saw filter,
input registors are set to 2 kΩ.
VIF amplifier has three capacitive coupling
amplifiers, direct connection from a saw filter is
available.
19
20
VIF INPUT
Internal filters (i.e. sound carrier BPF and sound
carrier trap) are tuned using the capacitor
connected to pin 21.
FILTER CONTROL
CAPACITOR
21
A value between 0.47 µF and 1 µF is considered
desirable taking video S/N, and AM and PM noise
into consideration.
Continued on next page.
No. 6930-10/13
LA75505M
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Pin 22 is the SIF PLL filter pin.
Normally use the following values.
R: 3 kΩ
C1: 0.01 µF
C2: 1000 pF
SIF PLL FILTER
22
When R is too large, the PLL may become
unlocked, so use a resistance value within 6 kΩ. A
smaller R value results in low-pass noise.
Pin 23 is the RF AGC VR pin.
23
RF AGC VR
When this pin is connected to GND, no signal is
appeared on pin 4 and pin 24.
Pin 24 is the FM output pin.
Time constance of de-emphasis is determined by
external C, R.
24
FM DET OUT
Please chose C, R to make time constance 75 µs.
No. 6930-11/13
LA75505M
Sample Application Circuit
IF INPUT
0.01µ
VCC(5V)
VCC(9V)
SAW(S)
30k
0.01µ
0.01µ
AGC OUT
RF
0.01µ
0.1µ
100µ
3k
AUDIO
OUT
1µ
0.02µ
15
0.01µ
SAW(P)
7.5k
47k
47k
13
1000p
23
AFT OUT
24
22
21
20
19
18
17
16
14
FM
DET
1st
AMP
VIF
S
PLL
FM
DET
AMP
AFT
AMP
IF
AGC
AGC
FIL
CONT
VIDEO
DET
APC
DET
1stSIF
DET
Unit
Capacitance: F
Resistance: Ω
LIM
AMP
AMP
SW
BPF
EQ
AMP
LPF
VCO
TRAP
FLL
BPF
1
2
3
4
5
6
7
8
9
10
11
12
IF SW
1µ
220k
OPEN:45.75MHz
GND :58.75MHz
3k
1µ
330
2k
0.01µ
VCO COIL
1µ
4MHz
X’tal
VIDEO OUT
CARRIER OUT
39p
No. 6930-12/13
LA75505M
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of April, 2001. Specifications and information herein are subject to
change without notice.
PS No. 6930-13/13
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