LA75503V [SANYO]
Adjustment Free VIF/SIF Signal Processing IC for PAL TV/VCR; 免费的调整VIF / SIF信号处理IC，适用于PAL TV / VCR
| 型号： | LA75503V |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Adjustment Free VIF/SIF Signal Processing IC for PAL TV/VCR |
| 文件： | 总15页 (文件大小：526K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENN6804
Monolithic Linear IC
LA75503V
Adjustment Free VIF/SIF Signal Processing IC
for PAL TV/VCR
Overview
Package Dimensions
The LA75503V is an adjustment free VIF/SIF signal
processing IC for PAL TV/VCR.
unit: mm
3191A-SSOP30 (275 mil)
It supports 38 MHz, 38.9 MHz, and 39.5 MHz as the IF
frequencies, as well as PAL sound multi-system (M/N,
B/G, I, D/K), and contains an on-chip sound carrier trap
and sound carrier BPF. To adjust the VCO circuit, AFT
circuit, and sound filter, 4-MHz external crystal or 4-MHz
external signal is needed.
[LA75503V]
Functions
• VIF amplifier
• VCO adjustment free PLL detection circuit
• Digital AFT circuit
• RF AGC
• Buzz canceller
SANYO: SSOP30 (275 mil)
• Equalizer amplifier
• 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.
• Internal sound carrier BPF and sound carrier trap enable
easy configuration of PAL sound multi-system at low
cost.
• Considerably reduces the number of required peripheral
parts.
• Use of digital AFT eliminates problem of AFT
tolerance.
• Package: SSOP30 (275 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. 6804-1/15
LA75503V
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Maximum supply voltage
V
CC max
V16
V18
I30
7
VCC
VCC
V
Circuit voltage
V
–1
mA
mA
mA
mA
mW
°C
I17
+0.5
Circuit current
I6
–10
I4
–3
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Tstg
Ta ≤ 70°C (*Mounted on a printed circuit board)
550
–20 to +70
–55 to +150
°C
Note: * Circuit board dimensions: 65 × 72 × 1.6 mm3, material: paper phenol.
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 = 38.9 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
52
3.3
1.0
1.7
48
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
B/G
P/S = 10 dB
Vin = 80 dBµ
26
32
38
10
10
Differential gain
3
Differential phase
DP
2
deg
V
Black noise threshold voltage
Black noise clamp voltage
VIF input resistance
VIF input capacitance
Maximum AFT voltage
Minimum AFT voltage
AFT tolerance 1
VBTH
VBCL
Ri
0.7
1.8
2.5
3
V
3.0
6
kΩ
PF
V
Ci
V13H
V13L
dfa1
dfa2
dfa3
Sf
4.3
0
4.7
0.2
±35
±35
±35
80
5.0
0.7
±70
±70
±70
V
f = 38.9 MHz
kHz
kHz
kHz
AFT tolerance 2
f = 38.0 MHz
AFT tolerance 3
f = 39.5 MHz
AFT detection sensitivity
AFT dead zone
RL = 100 kΩ//100 kΩ
40
120 mV/kHz
fda
30
60
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
fpu
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
4.0
fpl
dfu
dfl
β
8.0 kHz/mV
Continued on next page.
No. 6804-2/15
LA75503V
Continued from preceding page.
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
–30
max
N trap1 (4.75 MHz)
NT1
NT2
BT1
BT2
BT3
IT1
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
wrt 1 MHz
–35
–24
–32
–25
–32
–30
–20
–30
40
dB
dB
dB
dB
dB
dB
dB
dB
ns
ns
ns
ns
ns
ns
ns
ns
N trap2 (5.25 MHz)
–19
–27
–20
–27
–25
–15
–25
10
BG trap1 (5.75 MHz)
BG trap2 (6.1 MHz)
BG trap3 (5.85 MHz)
I trap1 (6.25 MHz)
I trap2 (6.8 MHz)
IT2
DK trap1 (6.75 MHz)
DT1
NGD1
Group delay 1 NTSC (3.0 MHz)
Group delay 1-1 NTSC (3.5 MHz)
Group delay 2 BG (4 MHz)
Group delay 2-1 BG (4.4 MHz)
Group delay 3 I (4 MHz)
Group delay 3-1 I (4.4 MHz)
Group delay 4 DK (4 MHz)
Group delay 4-1 DK (4.4 MHz)
[1st SIF Block]
70
NGD1-1 wrt 1 MHz
BGD2 wrt 1 MHz
BGD2-1 wrt 1 MHz
IGD3 wrt 1 MHz
IGD3-1 wrt 1 MHz
DGD4 wrt 1 MHz
DGD4-1 wrt 1 MHz
70
120
60
170
90
30
100
0
150
30
200
60
30
60
90
0
15
30
0
30
60
Conversion gain
Vg
So
fp = 5.5 MHz, Vi = 500µV
26
32
100
106
5.0
3
38
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
6
Cis
pF
Limiting sensitivity
Vi(lim)
Vo(FM)
AMR
46
560
50
52
700
60
58
dBµV
mVrms
dB
fp = 5.5 MHz, ∆F = ±30 kHz at 400 Hz
FM detector output voltage
AM rejection ratio
850
AM = 30% at 400 Hz
Total harmonic distortion
FM detector output S/N
BPF 3-dB bandwidth
THD
f = 5.5 MHz, ∆F = ±30 kHz
0.3
60
1.0
%
S/N(FM)
BW
55
dB
±100
–3
kHz
dB
PAL de-emphasis
Pdeem fm = 3 kHz
Ndeem fm = 2 kHz
GD
NTSC de-emphasis
–3
dB
PAL/NT audio voltage gain difference
[Others]
6
dB
4-MHz level (during external input)
SIF system SW threshold voltage
IF system SW threshold resistance
Split/inter SW
X4MIN
V10, V11
V12
Terminated
86
dBµ
V
1.4
0.5
270
kΩ
V
V16
No. 6804-3/15
LA75503V
System Switching
• SIF system switch
The SIF system is switched by setting pins A (pin 13) and B (pin 14) to GND or OPEN.
A
B
B/G
I
D/K
O
M/N
O
FM DET LEVEL
De-emphasis
75 µs
GND
GND
OPEN
OPEN
GND
OPEN
GND
OPEN
6 dB
0 dB
0 dB
0 dB
50 µs
O
50 µs
O
50 µs
Note: "O" indicates that the system is selected.
• IF system switch
38.9 MHz is selected as the IF frequency by leaving pin 15 (crystal oscillation) open. 38 MHz is selected by adding
220 kΩ between pin 15 and GND. This device can also select 39.5 MHz operation by adding a 220 kΩ resistor between
pin 15 and V
.
CC
• Split/inter carrier switch
Inter carrier is selected by setting the first SIF input (pin 20) to GND.
Sound Trap
The trapping point of the sound trap is set approximately 250 kHz above the SIF center frequency of each mode to
improve the video S/N. Therefore, design using split specifications is preferable.
Pin Assignment
1
2
3
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SIF INPUT
FM FILTER
NC
FM DET OUT
FM NOISE FILTER
RF AGC VR
SIF PLL FILTER
NC
4
5
6
1st SIF OUT
NC
VIDEO DET OUT
EQ FILTER
SIF AGC FILTER
APC FILTER
FLL FILTER
VCO COIL
FILTER CONTROL CAPACITOR
VIF INPUT
7
8
LA75503V
VIF INPUT
9
GND
10
11
12
13
14
15
VCC
1st SIF INPUT
NC
VCO COIL
SYSTEM SW [A]
SYSTEM SW [B]
REF OSC
IF AGC FILTER
RF AGC OUT
AFT OUT
Top view
No. 6804-4/15
LA75503V
Test Circuit
Input Impedance Measuring Circuit (VIF, First SIF input impedance)
Impedance analyzer
VIF INPUT
1st SIF INPUT
V
CC
+
100 µF
15 kΩ
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LA75503V
12
1
2
3
4
5
6
7
8
9
10 11
13 14 15
Top view
*: 0.01 µF in case of unspecified capacitor
No. 6804-5/15
LA75503V
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.
3
NC
Not connected
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.
Filter example
1st SIF OUT
4
Continued on next page.
No. 6804-6/15
LA75503V
Continued from preceding page.
Pin No.
5
Pin
NC
Pin Function
Internal Circuit
Not connected
Pin 6 is the video output pin.
The EQ amplifier can be thought of as shown
below.
6
7
VIDEO-OUT
EQ-OUT
Therefore, the peak gain of the EQ amplifier is
determined by Av = 1 + R/Z.
However, note that the LA75503V 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 8 is the SIF AGC filter pin.
SIF AGC FILTER
8
Use this pin with a capacitance between 0.01 µF
and 0.1 µF.
Pin 9 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
9
APC FILTER
FLL FILTER
output
10
Pin 10 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
10 is 3.6 V.
output
Continued on next page.
No. 6804-7/15
LA75503V
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
This is the VCO tank circuit for the PLL detector.
Use a tuning capacitance of 24 pF.
Use L and C specifications that are accurate to
±2%. Also, design the L and C values so that the
voltage of pin 10 is 3.6 V when PLL is locked while
using the IF center frequency.
11
12
VCO COIL
This is the system switch pin.
13
14
SYSTEM SW
The transistor turns ON when the pin voltage from
the circuit becomes approx. 1.4 V.
This pin can be used both as the crystal resonator
pin and IF switch.
The 38-MHz mode is selected by inserting 220 kΩ
between pin 15 and GND, the 38.9 MHz mode by
leaving the pin open, and the 39.5-MHz mode by
REF OSC
15
inserting 220 kΩ between pin 15 and VCC
.
4-MHz input is possible from this pin.
In the case of 4-MHz external input, input 86 dBµ
or more.
Continued on next page.
No. 6804-8/15
LA75503V
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Pin 16 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.
16
AFT OUT
waveform
Pin 17 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.
Comparator
17
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 18 is the IF AGC filter pin.
Normally, 0.01 µF to 0.02 µF polyester film
capacitor is used.
18
IF AGC FILTER
Determine the impedance based on H-SAG and
AGC speed.
19
NC
Not connected
Continued on next page.
No. 6804-9/15
LA75503V
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Pin 20 can be used both as the First SIF IN and
inter/split switch pins.
In the case of inter carrier, connect pin 20 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.
20
1st SIF INPUT
Connect the decoupling capacitor as close as
possible.
VCC
21
22
GND
Pins 23 and 24 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.
23
24
VIF INPUT
Continued on next page.
No. 6804-10/15
LA75503V
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
Internal filters (i.e. sound carrier BPF and sound
carrier trap) are tuned using the capacitor
connected to pin 25.
FILTER CONTROL
CAPACITOR
25
A value between 0.47 µF and 1 µF is considered
desirable taking video S/N, and AM and PM noise
into consideration.
26
NC
Not connected
Pin 27 is the SIF PLL filter pin.
Normally use the following values.
R: 3 kΩ
C1: 0.01 µF
C2: 1000 pF
SIF PLL FILTER
27
A large R value (6 kΩ or lower) results in high-pass
FM detection output noise. A smaller R value
results in low-pass noise.
Continued on next page.
No. 6804-11/15
LA75503V
Continued from preceding page.
Pin No.
Pin
Pin Function
Internal Circuit
output
Pin 28 is the RF AGC VR pin.
RF AGC VR
28
When this pin is connected to GND, no signal is
appeared on pin 6 and pin 30.
Pin 29 is the FM filter pin.
FM FILTER
29
Use a capacitance between 0.01 µF and 1 µF.
Pin 30 is the FM output pin.
The built-in differential amplifier determines and
switches the de-emphasis resistance value.
30
FM DET OUT
PAL: 5 k × 0.01µF
NT: 7.5 k × 0.01 µF
D
No. 6804-12/15
LA75503V
Sample Application Circuit
System Switch
A B
0 0
0 1
1 0
1 1
I
BG
GAIN
6 dB
0 dB
0 dB
0 dB
DK MN
1: OPEN
0: GND
No. 6804-13/15
LA75503V
Test Circuit
No. 6804-14/15
LA75503V
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. 6804-15/15
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