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 3.0V to 6.0V Rated supply voltage 4.5V Rev.1.0, Sep.19.2003, page 1 of 9 M51348AVP Block diagram &Pin configuration Audio OUTPUT 13 12 SIF GND Buffer Electronic VR 14 FM Detector IN 15 11 DC F/B FM(VR) det Limiter Limiter OUTPUT 16 AFT OUTPUT 17 Video Amp. AFT Video OUTPUT 18 2nd Amp. LLD COIL 19 LLD COIL 20 1st Amp. Video det. AFT COIL 21 Sync sep INPUT 22 RF AGC (Forward) Sync. Sep. Sync OUTPUT 23 IF AGC Adjust 24 . Rev.1.0, Sep.19.2003, page 2 of 9 IF AGC det. 10 SIF INPUT 9 SIF Vcc 8 VIF GND 7 IF INPUT 6 IF INPUT 5 VIF Vcc 4 RF AGC Delay 3 RF AGC OUTPUT 2 AGC Filter II 1 AGC Filter I M51348AVP Absolute maximum ratings (Ta=25°C,unless otherwise noted.) Parameter Symbol Ratings Unit Supply Voltage(1) Vcc(5) 7.5 V Supply Voltage(2) Power Dissipation Vcc(9) Pd 7.5 360 V mW Operating Temperature Storage Temperature Topr Tstg - 20 to +75 - 40 to +125 °C °C Note Temperature Characteristics 500 Power Dissipation(mw) 400 300 200 100 0 0 25 50 Ambient Temperature Ta(oC) Rev.1.0, Sep.19.2003, page 3 of 9 75 100 125 M51348AVP Electrical Characteristics AC Characteristic (VIF) (Ta = 25°C, unless otherwise noted.) Test point Limits No Parameter symbol Input Test conditions min Typ. max Unit 1 2 Circuit current Video detector output Input sensitivity IVIF Vodet 5 18 SG1 90dBµ Input current with 4.5V in 5. Output amplitude. 10 0.7 15 0.9 20 1.1 mA Vp- p Vinmin 18 SG1 Variable Input level when output amplitude reaches 3dB less than Vo det. Input level when output amplitude reaches 3dB more than Vo det. 45 55 dBµ 100 111 dBµ BW is defined as f1- f2 whenoutput amplitude reaches - 3dB less than when f1f2=1MHz. Output DC voltage with 4.5V in 4. 6 7 MHz 3.2 3.7 Vo- p 3 4 Maximum allowable input Vinmax 18 SG1 Variable 5 Video frequency characteristic BW 18 SG2 6 RF AGC maximum voltage V3H 3 SG4 90dBµ 7 RF AGC minimum voltage AFT detector sensitivity DC voltage at AFT mute ON V3L 3 0 0.2 Vo- p 17 Output DC voltage with 2V in 4. Refer to note1 µ SG4 90dBµ SG5 90dBµ 30 50 mV /KHz VM17 17 SG5 90dBµ Output DC voltage with 0V in 21. 2 2.25 2.5 V AFT center voltage Sync.Sep.output voltage VAC 17 0.5 1.4 2.5 V Vsync 23 SG1 90dBµ Output DC voltage with 0V in 2. Output amplitude. 3.5 3.8 4.1 Vp-p 12 Operating voltage VVIF 5 Must be operated. 3 6 V 13 Video detector output at high or low voltage VoHdet 18 SG1 90dBµ SG1 90dBµ Output amplitude with 6.0V or 3.0V in 5. 0.95 1.25 1.55 Vp-p 8 9 10 11 Rev.1.0, Sep.19.2003, page 4 of 9 M51348AVP AC Characteristic (SIF) No Parameter symbol 1 Circuit current ISIF 2 Detector output• voltage VoAF 3 Input limiting sensitivity Vimin 4 AM rejection ratio AMR Test point Limits Input Test conditions min Typ. max Unit 9 Input current with 4.5V in 9. 2.2 3.2 4.2 mA 13 SG6 90dBµ Output amplitude. 200 240 280 mVrms 13 SG6 Variable 32 49 dBµ 13 SG7 90dBµ Input level when input amplitude reaches - 3dB below VoAF . Where VAM denotes output amplitude, 40 53 dB AMR=20log Vo AF (mVrms) VAM (mVrms) 5 Bandwidth BW(s) 13 6 Electronic volume control characteristic VR1 13 7 Distortion THD 13 8 Operating voltage VSIF 9 9 Detector output voltage at high or low voltage VoHAF 13 VR2 VoLAF Rev.1.0, Sep.19.2003, page 5 of 9 SG8 90dBµ SG6 90dBµ Refer to note2. 100 130 kHz Ratio of output amplitude and VoAF when 14 is changed from 4.0V to 1.0v. 3.0 3.9 4.8 dB -53 -45 SG9 90dBµ SG6 90dBµ Measured by distortion meter. Must be operated. 0.4 1.0 % 3 6 V SG6 90dBµ Output amplitude with 6.0V or 3.0V in 9 380 430 480 mVrms 53 64 75 Rev.1.0, Sep.19.2003, page 6 of 9 0.33u 0.01u 2 1 3.3K 23 24 23 3 22 820p 0.01u 2.2u 2 20K 33u 10K 3 470 4 4 21 0.01u 21 0.01u 5 20 4.7u 180K 19 18 18 5 6 1:1 VIF IN 0.01u 7 50 8 17 M51348AVP LLD 3.3K 0.01u 390K 33u 9 17 390K 9 16 27p 11 14 14 2.2u SIF IN 50 0.01u 10 15 0.01u 120 430 CDA 4.5MC20 0.01u 12 13 4.7K 13 0.01u M51348AVP Test Circuit 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 7 8 0.01µF VIF IN 0.01µF 50Ω 3) lnput signals are shown below. SG1 fo=58.75MHz fm=20KHz 77.8%AM SG2 f1=58.75MHz Vi=90dBµ CW f2=53 ±5MHz Vi=70dBµ CW fo=58.75MHz Linearity 10step signal SG3 (87.5%Video modulation) SG4 fo=58.75MHz CW SG5 fo=58.75 ±5MHz CW(SWEEP) SG6 fo=4.5MHz FM 25KHz dev fm=400Hz SG7 fo=4.5MHz AM 30% fm=400Hz SG8 fo=4.5MH• ±200KH• FM 7.5KHz dev fm=400Hz SG9 fo=4.5MH• FM 7.5KHz dev 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= 1500mV fB(kHz)-fA(kHz) Note2 Bandwidth "BW(s)" 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 HE G Z1 e 1 24 z y Detail G D JEDEC Code − MMP b 12 13 x Weight(g) 0.12 M Detail F A2 A Lead Material Alloy 42 L1 EIAJ Package Code SSOP24-P-275-0.65 E Rev.1.0, Sep.19.2003, page 9 of 9 A1 F c L b2 e1 b2 e1 I2 A A1 A2 b c D E e HE L L1 z Z1 x y Symbol 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 Recommended Mount Pad e Plastic 24pin 275mil SSOP I2 24P2E-A M51348AVP Package Dimensions Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Keep safety first in your circuit designs! 1. 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