Ordering number : EN*A1005A
Monolithic Linear IC
LA75676NVA
Overview
IF Signal Processing (VIF/SIF) IC
for use in TV/VCR Applications
The LA75676NVA is an NTSC INTER-CARRIER support VIF/SIF IF IC that adopts a semi-adjustment-free system.
The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the
adjustment steps in the manufacturing process. PLL detection is adopted in the FM detector. A 5-V power-supply voltage
is used to match that used in most multimedia systems. In addition, this IC also includes a buzz canceller to suppress
Nyquist buzz and provide high audio quality.
Functions
•
VIF Block :VIF Amplifier, Buzz Canceller, PLL Detector, IF AGC, RF AGC, AFT, Equalizer Amplifier, BNC
•
SIF Block :Limiter Amplifier, PLL FM detector
Features
•
Both AFT and SIF inductors built in, thus making adjustment of external inductance unnecessary.
•
Built-in buzz canceller for excellent audio performance.
•
VCC=5V, low power dissipation (250mW)
Specitications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta≤70°C *Mounted on a board
Conditions
Ratings
6
600
-20 to +70
-55 to +150
Unit
V
mW
°C
°C
Note*: Mounted on a specified board: 114.3mm×76.1mm×1.6mm, glass epoxy board.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. 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.
31208 TI IM / 30508 TI IM No.A1005-1/12
LA75676NVA
Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Operating voltage range
Symbol
VCC
VCC op
Conditions
Ratings
5
4.5 to 5.5
Unit
V
V
Electrical Characteristics
at Ta = 25°C, VCC = 5V, fp = 45.75MHz
Ratings
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
Sync. signal tip voltage
Video output level
Black noise threshold voltage
Black noise clamp voltage
Video S/N
C-S beat
Frequency characteristics
Differential gain
Differential phase
No-signal AFT voltage
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 tolerance frequency 1
VCO1 maximum variable range (U)
VCO1 maximum variable range (L)
VCO control sensitivity
SIF Block
Limiting sensitivity
FM detection output voltage
AM rejection ratio
Total harmonic distortion
FM detection output S/N
4.5MHz output level
Vli(lim)
VO(FM)
AMR
THD
S/N(FM)
Vsout
SIF IN 80dBμV
4.5MHz
±
15kHz
59
87
4.5MHz
±
25kHz
39
767
50
45
1000
60
0.5
64
94
101
1.0
51
1280
dBμV
mVrms
dB
%
dB
dBμV
I5
V14H
V14L
Vi
GR
Vi max
V4
V6tip
VO
VBTH
VBCL
S/N
IC-S
fc
DG
DP
V13
V13H
V13L
Sf
Ri
Ci
fpu
fpl
Δfa1
dfu
dfl
β
1.3
-150
1.0
45.75MHz
45.75MHz
1.3
2.0
4.0
0
19
6MHz
VIN=80dBμ
32
51
95
3.0
0.9
1.7
0.3
1.3
48
38
-3
34
VCC-0.5
42
VCC
0
38
56
100
3.3
1.2
2.0
0.5
1.6
52
43
-1.5
3.0
3
2.5
4.4
0.18
28
1.5
3
2.0
-2.0
0
1.5
-2.0
2.7
-1.5
5.4
-1.4
+150
6.5
5
3.0
5.0
1.0
36
3.6
1.5
2.3
0.7
1.9
0.5
44
52
mA
V
V
dBμV
dB
dBμV
V
V
Vp-p
V
V
dB
dB
dB
%
deg
V
V
V
mV/kHz
kΩ
pF
MHz
MHz
kHz
MHz
MHz
kHz/mV
Symbol
Conditions
min
typ
max
Unit
*: If the dynamic range of the FM detection output needs to be widened, connect a resistor and a capacitor in series between pin 23 and GND for level
adjustment.
*: The resistor between pin10 and GND must be 470Ω or more.
No.A1005-2/12
LA75676NVA
Package Dimensions
unit : mm (typ)
3287
6.5
24
13
4.4
6.4
1
0.5
(0.5)
0.22
12
0.15
SANYO : SSOP24(225mil)
Pin Assignment
0.1
(1.3)
1.5max
SIF INPUT
BIAS FILTER
SIF OUT
NC
VCC
VIDEO OUT
EQ FILTER
EQ INPUT
APC FILTER
1
2
3
4
5
6
0.5
24 FM DET OUT
23 FM FILTER
22 BPF OUT
21 RF AGC VR
20 GND
19 VIF INPUT
LA75676NVA
7
8
9
18 VIF INPUT
17 1st AGC FILTER
16 2nd AGC FILTER
15 2nd AGC FILTER
14 RF AGC OUT
13 AFT OUT
VIDEO DET OUT 10
VCO COIL 11
VCO COIL 12
Top view
No.A1005-3/12
LA75676NVA
Test Circuit
Input Impedance Measuring circuit (VIF, First SIF input impedance)
Impedance
analyzer
VIF IN
0.01μF
0.01μF
0.01μF
0.01μF
0.01μF
0.01μF
0.01μF
0.01μF
10kΩ
0.01μF
0.01μF
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
0.01μF
0.01μF
330Ω
100kΩ
LA75676NVA
100kΩ
100μF
+
VCC
ILA07172
AC Characteristics Test Circuit Diagrams
VIF IN
4.5MHz OUT
(E)
50kΩ-VR
51Ω
IF AGC
1000pF
100kΩ
0.01μF
(M)
0.01μF
0.01μF
0.01μF
0.01μF
7.5kΩ
1μF
GND
0.01μF
(M)
0.01μF
FM DET OUT
(D)
0.01μF
V
RF AGC
OUT
(F)
AFT
OUT
(B)
+
23
22
1.8kΩ
24
21
20
19
18
17
16
15
14
V
13
30kΩ
FM
DET
RF
AGC
IF
AGC
VIF
AMP
9dB
VIDEO
DET
AFT
HPF
LIM
AMP
EQ
AMP
1
0.01μF
VCO
2
3
100kΩ
4
+
5
0.01μF
6
100kΩ
7
1.5kΩ
8
+
150Ω
9
0.47μF
10
11
24pF
12
51Ω
1μF
+
2nd SIF IN
SIF OUT (C)
VIDEO
OUT
(A)
S1
560Ω
330Ω
100kΩ
VCC
GND
ILA07173
No.A1005-4/12
LA75676NVA
Application Circuit Diagrams
INPUT
4.5MHz
OUT
50kΩ-VR
1000pF
RF AGC
OUT
0.01μF
VCC
100kΩ
SAW (P)
0.047μF
(M)
0.1μF
(M)
1μF
0-10kΩ
(M)
0.01μF
1000pF
AF OUT
7.5kΩ
+
GND
330pF
AFT OUT
100kΩ
1.8kΩ
24
23
22
21
20
19
18
17
16
15
14
VCC
13
30kΩ
FM
DET
RF
AGC
IF
AGC
VIF
AMP
6dB
LIM
AMP
VIDEO
DET
AFT
HPF
EQ
AMP
1
+
BPF
4.5MHz
330Ω
2
1μF
VCO
3
4
1μF
5
+
0.01μF
6
7
8
+
15μH
9
0.47μF
10
560Ω
11
12
330Ω
2.2kΩ
VCC
GND
VIDEO OUT
ILA07174
No.A1005-5/12
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