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M51348AVP
VIF/SIF for Low Supply Voltage
REJ03F0062-0100Z Rev.1.0 Sep.19.2003
Description
The M51348 is a low supply voltage, low power semiconductor IC for compact TV sets which includes Video Intermediate Frequency (VIF), Sound Intermediate Frequency (SIF), and Synchronous Separation (Sync. Sep.) functions. An IF amplifier. Video detector (with simultaneous sound detector), IF AGC, RF AGC (forward type), AFT, SIF limiter amplifier, FM detector electronic volume, and synchronous separation function are provided. The package is of the 24-pin mini-flat type. The M513848AFP has better DG and DP but less VIF input sensitivity than the M51348FP.
Features
· This IC can be used with very low supply voltage and low power and it comes in a mini-flat package to suit the compact TV or compact TV tuner. Minimum operating power voltage 3V Consuming current 16mA (when used with 4.5V supply voltage) · Current automatically decreases to ensure power saving when a strong signal is received, when the electronic volume control is at its lowest. · There are separate GND pins for the VIF/Sync. Sep. circuit and for the SIF circuit so that cross-interference is reduced. · It is possible to adjust the video detector output amplitude by controlling the 24-pin voltage externally. · The AGC works fast because of the 2-stage AGC filter. AGC has high stability against outside noise due to the AGC noise canceller. · Emitter input circuit is used in Sync. Sep. Output is taken from the Sync. Positive polarity.
Application
Portable B/W, color TV
Recommend Operating Condition
Supply voltage range Rated supply voltage 3.0V to 6.0V 4.5V
Rev.1.0, Sep.19.2003, page 1 of 9
M51348AVP
Block diagram &Pin configuration
Audio OUTPUT 13
Buffer
12 SIF GND
Electronic VR 14 FM(VR) det
11 DC F/B
FM Detector IN 15
Limiter
10 SIF INPUT
Limiter OUTPUT 16 Video Amp.
9
SIF Vcc
AFT OUTPUT 17
AFT
8
VIF GND
Video OUTPUT 18 2nd Amp. Video det. 1st Amp.
7
IF INPUT
LLD COIL 19
6
IF INPUT
LLD COIL 20
5
VIF Vcc
AFT COIL 21 Sync. Sep. RF AGC (Forward)
4
RF AGC Delay
Sync sep INPUT 22
3
RF AGC OUTPUT
Sync OUTPUT 23 IF AGC det.
2
AGC Filter II
IF AGC Adjust 24
1
AGC Filter I
.
Rev.1.0, Sep.19.2003, page 2 of 9
M51348AVP
Absolute maximum ratings
(Ta=25°C,unless otherwise noted.)
Parameter Supply Voltage(1) Supply Voltage(2) Power Dissipation Operating Temperature Storage Temperature Symbol Vcc(5) Vcc(9) Pd Topr Tstg Ratings 7.5 7.5 360 - 20 to +75 - 40 to +125 Unit V V mW °C °C Note
Temperature Characteristics 500
400
Power Dissipation(mw)
300
200
100
0 0 25 50 75 100 125
Ambient Temperature Ta(oC)
Rev.1.0, Sep.19.2003, page 3 of 9
M51348AVP
Electrical Characteristics
AC Characteristic (VIF) (Ta = 25°C, unless otherwise noted.)
No 1 2 3 Parameter Circuit current Video detector output Input sensitivity symbol IVIF Vodet Vinmin Test point 5 18 18 Limits Input SG1 90dBµ SG1 Variable SG1 Variable SG2 Test conditions Input current with 4.5V in 5. Output amplitude. Input level when output amplitude reaches 3dB less than Vo det. Input level when output amplitude reaches 3dB more than Vo det. BW is defined as f1- f2 whenoutput amplitude reaches - 3dB less than when f1f2=1MHz. Output DC voltage with 4.5V in 4. Output DC voltage with 2V in 4. Refer to note1 Output DC voltage with 0V in 21. Output DC voltage with 0V in 2. Output amplitude. Must be operated. Output amplitude with 6.0V or 3.0V in 5. min 10 0.7 Typ. 15 0.9 45 max 20 1.1 55 Unit mA Vp- p dBµ
4
Maximum allowable input Video frequency characteristic
Vinmax
18
100
111
dBµ
5
BW
18
6
7
MHz
6 7 8 9
RF AGC maximum voltage RF AGC minimum voltage AFT detector sensitivity DC voltage at AFT mute ON AFT center voltage Sync.Sep.output voltage Operating voltage Video detector output at high or low voltage
V3H V3L µ VM17
3 3 17 17
SG4 90dBµ SG4 90dBµ SG5 90dBµ SG5 90dBµ SG1 90dBµ SG1 90dBµ SG1 90dBµ
3.2 30 2
3.7 0 50 2.25
0.2 2.5
Vo- p Vo- p mV /KHz V
10 11 12 13
VAC Vsync VVIF VoHdet
17 23 5 18
0.5 3.5 3 0.95
1.4 3.8 1.25
2.5 4.1 6 1.55
V Vp-p V Vp-p
Rev.1.0, Sep.19.2003, page 4 of 9
M51348AVP AC Characteristic (SIF)
No 1 2 3 Parameter Circuit current Detector output· voltage Input limiting sensitivity AM rejection ratio symbol ISIF VoAF Vimin Test point 9 13 13 Limits Input SG6 90dBµ SG6 Variable SG7 90dBµ Test conditions Input current with 4.5V in 9. Output amplitude. Input level when input amplitude reaches - 3dB below VoAF . Where VAM denotes output amplitude, min 2.2 200 Typ. 3.2 240 32 max 4.2 280 49 Unit mA
mVrms
dBµ
4
AMR
13
40
53
dB
AMR=20log Vo AF (mVrms) VAM (mVrms)
5 6 Bandwidth Electronic volume control characteristic Distortion Operating voltage Detector output voltage at high or low voltage BW(s) VR1 VR2 THD VSIF VoHAF VoLAF 13 9 13 13 13 SG8 90dBµ SG6 90dBµ SG9 90dBµ SG6 90dBµ SG6 90dBµ Refer to note2. Ratio of output amplitude and VoAF when 14 is changed from 4.0V to 1.0v. Measured by distortion meter. Must be operated. Output amplitude with 6.0V or 3.0V in 9 100 3.0 3 380 53 130 3.9 -53 0.4 430 64 4.8 -45 1.0 6 480 75 % V
mVrms
kHz dB
7 8 9
Rev.1.0, Sep.19.2003, page 5 of 9
180K 390K 390K 17 0.01u 820p 470 21 430 3.3K LLD 23 18 120 27p 14 4.7K 13 0.01u CDA 4.5MC20
Test Circuit
M51348AVP
4.7u 0.01u 20K
Rev.1.0, Sep.19.2003, page 6 of 9
23 22 21 20 19 18 17 16 15 14 13
24
M51348AVP
2 2 3 4
0.01u 0.01u 10K 33u 2.2u 33u 0.01u 0.01u 50 0.01u 50 0.01u 2.2u
1
3
4
5
6
7
8
9
10
11
12
3.3K
0.01u
5
1:1
9
0.33u
VIF IN
SIF IN
M51348AVP Precaution concerning electical charactristics 1) Voltage Supplied (pins 5 and 9)is 4.5V unless otherwise noted in the conditions column. 2) VIF input amplitude (Vin)is the amplitude of VFI IN in the circuit below.Feed SG1 90dBµ signal into the circuit below,and measure the DC voltage V2 at 2.Set the circuit for AC voltage measurement and adjust the input amplitude,monitoring DC voltage at 2 ,until it reaches the level of V2.90dBµ is defined as the input amplitude at that time.
6
0.01µF VIF IN 50
7
0.01µF
8
3) lnput signals are shown below. SG1 fo=58.75MHz SG2 f1=58.75MHz f2=53 ±5MHz SG3 fo=58.75MHz
fm=20KHz Vi=90dBµ Vi=70dBµ Linearity 10step signal (87.5%Video modulation)
77.8%AM CW CW
SG4 SG5 SG6 SG7 SG8 SG9
fo=58.75MHz fo=58.75 ±5MHz fo=4.5MHz fo=4.5MHz fo=4.5MH· ±200KH· fo=4.5MH· FM 25KHz dev AM 30% FM 7.5KHz dev FM 7.5KHz dev
CW CW(SWEEP) fm=400Hz fm=400Hz fm=400Hz fm=400Hz
4) Adjustment of LLD coil 1. Feed SG5 Vi=90dBµ into VIF IN. 2. AFT coil must be shifted to detuned condition. 3. Feed outside voltage to 2 and check tank response at 18 as shown in the figure below. 4. Adjust LLD coil so that peak comes at 58.75MHz.
58.75MHz
DC level with no signal
V18
0.6Vp-p
f
Rev.1.0, Sep.19.2003, page 7 of 9
M51348AVP 5) Adjustment of AFT coil 1. Feed SG5 Vi=90dBµ in VIF IN. 2. Measure the voltage at pin 17 and adjust AFT coil as shown in the figure below.
58.75MHz
V17
2.25V
f
Note1
AFT detector sensitivity "µ"
58.75MHz 3V V17 2.25V 1.5V f
Where fA denotes a frequency at A and fB at B.
µ=
Note2 Bandwidth "BW(s)"
1500mV fB(kHz)-fA(kHz)
First,define Vo(DET)FM as the output amplitude when the signal fo=4.5MHz,fm=400Hz and fdev=±7.5KHz is given to SIF IN. Decrease and increase the frequency to until the output amplitude reaches - 3dB than Vo(DET)FM.These are defined as fo L and fo H respectively.Bandwidth is defined as BW(s) = foH- foL
Rev.1.0, Sep.19.2003, page 8 of 9
M51348AVP
24P2E-A
JEDEC Code - e b2
13
MMP
Weight(g) 0.12 Lead Material Alloy 42
Plastic 24pin 275mil SSOP
EIAJ Package Code SSOP24-P-275-0.65
24
Package Dimensions
HE
E
L1
L
Rev.1.0, Sep.19.2003, page 9 of 9
e1
F
Recommended Mount Pad Symbol
1 12
A
G
D
A2 e y x
M
A1
b
A A1 A2 b c D E e HE L L1 z Z1 x y c Detail F b2 e1 I2
z Detail G
Z1
Dimension in Millimeters Min Nom Max - 1.45 - 0.2 0.1 0 - 1.15 - 0.32 0.22 0.17 0.2 0.15 0.13 7.9 7.8 7.7 5.7 5.6 5.5 - - 0.65 7.8 7.6 7.4 0.7 0.5 0.3 1.0 - - 0.325 - - - - 0.475 - - 0.13 - - 0.1 - 0° 10° - - 0.35 - - 7.0 - - 1.0
I2
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