NJRC NJM2542 Vif/ sif demodulator Datasheet

NJM2542
VIF/SIF Demodulator
„ DESCRIPTION
The NJM2542 is a VIF/SIF demodulator especially designed for TV
and VCR based on the NTSC system.
FM-PLL(Phase Locked Loop) detector reduces the number of pins
„ PACKAGE OUTLINE
and external parts, for efficient use of set space.
NJM2542V
„ FEATURES
• Operating Voltage 5V
• Alignment-free Automatic Frequency Tuning
• Alignment-free FM-PLL Demodulator
• Intercarrier type
• Bipolar Technology
• Package Outline: SSOP20
EQ
AFTOUT
RFAGC
ADJ
IFIN2
IFIN1
GND
RFAGC
OUT
AGCFLT1
AFNFB
AFOUT
„ BLOCK DIAGRAM
20
19
18
17
16
15
14
13
12
11
AGC
AFAMP
IFAMP
AFT
FMDET
SVCO
APC
DET
EQAMP
LIM
1
2
3
4
5
6
7
8
9
10
EQOUT
APCFLT
EQIN
V+
VCOL1
VCOL2
VREF
VDETOUT
AGCFLT2
LIMIN
VCO
-1-
NJM2542
„ ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Supply Voltage
Vcc
Power Dissipation
PD
Operating Temperature Range
Topr
Storage Temperature Range
Tstg
Ratings
6
*600
-20 to +80
-40 to +150
(TA=25°C)
Unit
V
mW
°C
°C
* Test IC soldered on PC board
„ RECOMMENDED OPERATING VOLTAGE RANGE
Parameter
Condition
Operating Voltage
Symbol
Vcc
Min.
4.75
Typ.
5.0
(TA=25°C)
Max.
Unit
5.25
V
„ ELECTRICAL CHARACTERISTICS
Standard Test Conditions:
(TA =25°C,Vcc=5V,IF=45.75MHz/90dBuV,IF IN has 1:1Transformer instead of SAW filter.)
Parameter
Condition
Symbol
Min.
Typ.
AFT-Defeat
Supply Current
Icc
51
IFGR-MAX(AGCFLT=GND)
VIF Section (45.75MHz/90dBuV)
No IF Signal
Video Output Level (DC)
VDC
3.6
FGR-MAX(AGCFLT=GND)
Video Output Level
Video : 100% White,87.5% Mod
Vo
1.5
1.9
Video Bandwidth
-3dB Point
fvc
7
Video S/N
VIDEO:100% White,87.5%Mod Video S/N
50
56
Intermodulation
P/C/S=1/-10/-10dB
IM
34
40
Differential Gain
DG
±2
Differential Phase
DP
±2
Input Signal Voltage Sensitivity -3dB Point
VINMIN
44
Maximum Input signal Voltage
VS Ratio (>24%,<34%)
VINMAX
101
105
IF Gain Control Range
VINMAX-VINMIN
GR
49
61
RF AGC Maximum Voltage
IFGR-MAX(AGCFLT=GND)
VRAH
4.3
4.9
RF AGC Minimum Voltage
IFGR-MIN(AGCFLT= V+)
VRAL
0
0.03
Picture Carrier Capture Range 1
CL-U
1.3
Picture Carrier Capture Range 2
CL-L
3.5
AFT Sensivity
Sf
20
30
AFT Maximum Voltage
VAFH
4.2
4.9
AFT minimum Voltage
VAFL
0
0.05
Sync Level
VOSYNC
1.35
AFTOUT=2.5V
VCO Frequency Range
FVCOWB
±250
Center=45.65MHz
SIF Section(SIF=4.5MHz/90dBuV)
Audio Output DC Voltage
LIMIN=4.5MHz CW
VDCA
1.8
2.2
Audio Output
LIMIN=4.5MHz FM±25kHz dev
VAFO
390
540
Total Harmonic Distortion
LIMIN=4.5MHz FM±25kHz dev
THDAF
0.2
Input Limiting Voltage Sensivity
LIM
38
AM Rejection Ratio
FM±25kHzDEV :AM30%
AMR
50
56
Audio S/N
De-Emphasis: ON
AF S/N
56
-2-
Max.
Unit
-
mA
-
V
2.3
50
±7
±7
52
5.0
0.5
5.0
0.5
-
Vp-p
MHz
dB
dB
%
deg
dBuV
dBuV
dB
V
V
MHz
MHz
mV/kHz
V
V
V
-
kHz
2.6
770
1.0
-
V
mVrms
%
dBuV
dB
dB
NJM2542
„ PINNING
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Symbol
EQOUT
APCFLT
EQIN
V+
VCOL1
VCOL2
VREF
VDETOUT
AGCFLT2
LIMIN
AFOUT
AFNFB
AGCFLT1
RFAGCOUT
GND
IFIN1
IFIN2
RFAGCADJ
AFTOUT
EQ
Description
Equalizer AMP Output
APC Filter (PLL loop Filter)
Equalizer AMP Input
Power Supply
VCO Coil 1
VCO Coil 2
Reference Voltage for Audio
Video Demodulator Output
AGC Filter 2
Limiter (sound intercarrier) Input
Audio Output
Audio High Pass Filter
AGC Filter 1
RF AGC Output
GND
IF Differential Input 1
IF Differential Input 2
RF AGC Adjustment
AFT Output
Equalizer
-3-
NJM2542
„ TEST CIRCUIT
V+
AFT-OUT
IF-IN
V+
RFAGC-OUT
Audio-OUT
100k
100k
50kVR
Saw
Filter
100k
10n
100k
10n 10n
10n
0.22u
+
10n
1u
2.4k
33n
EQ
19
20
18
17
16
15
14
13
12
AGC
11
AFAMP
IFAMP
AFT
SVCO
APC
FMDET
DET
EQAMP
LIM
VCO
1
2
3
47
Video OUT
5
6
7
8
9
10
LIM-IN
VDET
-OUT
27CH
10n
0.22u
4
V+
EQ
-IN
EQ
-OUT
+
10n
10n
10n
39CH
10n
100u
VCO COIL
470
12u
1k
200
360
T4.5C
SFE4.5C
-4-
NJM2542
„ TYPICAL CHARACTERISTICS
Standard Test Conditions:
(TA=25°C,Vcc=5V,IF=45.75MHz/90dBuV, IF IN has 1:1Transformer instead of SAW filter.)
VIDEO DG/DP
VIDEO S/N
10
60
DG
DP
8
DG[%] / DP[deg]
VIDEO S/N [dB]
50
40
30
6
4
2
0
20
-60
-50
-40
-30
-20
-10
0
-60
10
-50
-40
IF Level [dBm ]
-20
-10
0
10
AUDIO S/N / BUZZ
VIDEO Chrom a/920K_Beat
60
50
50
40
AUDIO S/N / BUZZ [dB]
Chroma/920K_Beat [dB]
-30
IF Level [dBm ]
30
20
10
40
S/N
BUZZ(SMPTE)
30
20
10
0
0
-60
-50
-40
-30
-20
-10
0
10
-70
-60
-50
-40
IF Level [dBm ]
-30
-20
-10
0
P/S [dB]
THD
AF Level
3
600
2
THD [%]
AF Level [mVrms]
500
400
300
1
200
0
100
-80
-60
-40
SIF [dBm ]
-20
0
2
3
4
5
6
7
SIF [MHz]
-5-
MEMO
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
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