CXA1929MTV RF MODULATOR/PLL
For the availability of this product, please contact the sales office.Description
Fully synthesized I2C controlled UHF/VHF TV RFModulator compatible with PAL and NTSC videoformats.
Features
•Minimal adjustment of external components•For use on VHF and UHF TV Frequencies
•Video RF carrier frequency programmable in 125kHz steps•ATT Driver•I2C control of:
a. Video RF Carrier Frequencyb. Sound Carrier Frequency
c. Modulation Depth (±2.5 % Typ.)d. FM Deviation (±7 % Typ.)e. P/S ratio (±1 dB Typ.)
f. Nicam output enable to sleepg. Video RF carrier enable to sleep•On chip Regulator 3.1 V
24 pin SOP (Plastic)
Applications
•PAL and NTSC System VCR•Satellite Receiver•Set Top Box
Structure
Bipolar silicon monolithic IC
Recommended Operating Voltages(Ta=25 °C)•Supply voltageVCC5.0±0.5V•Supply for VCO Varactor–30 to +0.5°C•Operating Temperature–10 to +80°C
Block Diagram
Analog GNDAnalog VCCRF-OUTMOD-adjOSC VCCOSC GNDOSC2OSC3OSC1PDout14PLLOSC424AMP232221201918171615VIDEOMIXERAMPTPSGVCOW/C-CLAMPFM-OSCREGPLLPLLI2C-InterfaceATTDriverOSC1Video-in2Vreg3NTSCAudio-in4PALAudio-in5FM-Tank6Audio-Loopfilter7Digital GND8Xtal9Digital-VCC1011Sony reserves the right to change products and specifications without prior notice. This information does not convey any license byany implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating theoperation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
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A-driverSDASCLEF1312E96514-TE
Multi-standard RF ModulatorAudioLoopFilterAudioTankAnalogVCCGroundDigitalGroundDigitalVCC元器件交易网www.cecb2b.com
Audio inNTSCAmp62.5kHzBRF AmpABvideolimiterModulationdepthBuffer× 2OSCCDALoopFilterLoop filterBdivideMPhasedetectordivide254MHzOSCXTAL4MHzBATTDriverRegulatorA62.5kHz250kHzMixerandAdderFM ModPLLP/ScontrolRF OutputSwitchAudio inPALModulationdepthVideo inVideoclamp—2—
divide8MemoryLatchCCTDriveroutV RegTPSGOSCSDAI2CSCLB4MHzCXA1929M
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CXA1929M
Functional Description of RF Modulator System
A block diagram of the RF modulator is shown in Fig. 1.
The composite video signal passes through an amplitude limiting circuit and a digitally controlled modulationdepth adjustment circuit. By means of three allocated I2C control bits it is possible to adjust the modulationdepth from a nominal 74 % to 86% in 2.0 % steps. Modulation depth can also be controlled externally byaddition of an external resistor on pin3. The video signal is then passed through to the mixer. In the mixerstage, both the video composite signal and FM sound carrier amplitude modulate the RF carrier from the UHFOSC, and the issuing signal is fed to the output via an RF amplifier.
The audio signals enter the chip via pin4. The FM Voltage Controlled Oscillator is band-switched to theapproximate centre frequencies of the four sound carrier frequencies 4.5 MHz (NTSC) or 5.5, 6.0, 6.5 MHz(PAL). The required correct audio carrier frequency is fine tuned by the adjustment of fsound via I2C, whereupon the FM phase locked loop will lock the VCO onto the exact centre frequency. Minimum distortion of theFM signal occurs when the centre frequency of the oscillator coincides with a mid-rail control voltage (to 2.0 V).Hence fine adjustment capacitors are also integrated on the chip, which tag into account any capacitancevariations from one batch to another. This is achieved by fine adjustment of Delta fsound via I2C control. Thedesign of the FM modulator eliminates the need for an external varactor.
The amplitude of the FM signal is varied via I2C by a digitally controlled logarithmic gain stage, which controlsthe picture to sound power ratio (P/S). This signal is then fed into the RF amp. Hence at the RF output theP/S ratio can be programmed in 1 dB steps between the range 10 dB and 17 dB (see ElectricalCharacteristics). Audio sensitivity can be programmed in 8 % steps between the range –32 % and +24 %.The UHF is phase locked to the reference frequency by means of the UHF phase locked loop. The VCOoutput passes through a prescaler (≈8) followed by an I2C controlled programmable divider (≈M), and thenphase compared with that of a reference signal at 15.625 kHz. The reference signal is derived from a 4 MHzcrystal oscillator feeding a –256 divider. The UHF oscillator covers the frequency range 471 MHz to 855 MHzin frequency steps of 125 kHz. This is adequate for the UHF NTSC and PAL TV channels (471.25MHz (CH21)to 855.25 MHz (CH69)). By adjustment of the external components around the oscillator and some adjustmentto output matching the RF modulator can also achieve range of frequencies in the VHF range.
The Nicam input (pin 22) accepts the 6.522 MHz Nicam signal subcarrier QPSK at 728 K bits/s data. This isthen buffered and feed into a separate mixer (controlled via VCO). This then feeds to the RF amp with thecomposite video and audio. The I2C control will switch the Nicam signal output off or on.
—3—
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I2C Interface Data formatModulator Address
11001Data 1RFADJ1ADJ0S1S0Data 2M12M11M10M9M8Data 3M4M3M2M1M0Data 4
—
OSC
FM2
FM1
FM0
Sound Carrier Course Adjust
S1S0Sound CarrierTV SystemFrequency(Pre-emphasis)
004.5 MHzNTSC015.5 MHzPAL106.0 MHzPAL1
1
6.5 MHz
PAL
Sound Carrier Fine AdjustADJ1ADJ0df Adjuston chipcapacitance00–f6.4 pF01Normal3.2 pF10+f1.6 pF1
1
+f
0
RFRF Power on (RF Amp & RF Mixer Driver)TPSGTEST Pattern Signal GeneratorATTLocal/distance external attenuator driverOSCOscillator ON/OFF switchOVMOver Modulation TestM12–MOMain divider control dataS1–S0Sound carrier frequency selectionADJ1–ADJ0Sound carrier frequency adjust (0 to 6.4 RF)MD2–MD0Modulation DepthPS2–PS0Picture/Sound controlFMFM deviation adjustM12MOMain UHF PLL DividerMSBLSB8191 to 2
Video Carrier frequency calculated from = 125 (M+2) kHz
—4—
CXA1929M
00R/WaskTPSGOVMATTaskM7M6M5askMD2MD1MD0askPS2
PS1
PS0
ask
1 bit1 bit1 bit1 bit1 bit13 bits2 bits2 bits3 bits3 bits3 bits
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CXA1929M
Software Application Notes
The minimum requirement to drive the CXA3050 and I2C bus drive is a 386/486 with 4 M bytes hard diskspace, 16 MHz clock speed and running DOS5.00 or above. Insert the disc into the drive and type TESTS andat the prompt type iic. At this there should appear a single list of user friendly functional tests that can bechanged by keyboard manipulation. As an aid the test list is written below. Note Page up increments thestatus, page down decrements the status.
FunctionRF Output PowerDelta SoundNormal Status
1/01
Fsound0
Frequency modeMod depthFM deviationP/S RatioOver ModTPSGOSC on.Attenuator Driver
2 to 8191
4441/01/01/01/0
Comments
Turns RF Amp on/offFine tune audio carrierCourse adjust for4.5 MHz (0)5.5 MHz (1)6.0 MHz (2)6.5 MHz (3)
Check listing on page 10 forfrequency to hex conversationRanges mod depth from72 % to (4)
Sensitivity adjustable
Programmable in 8 steps of 1 dBIncrease Video modulation ratioSets internal test patterngenerator ON/OFFTurns oscillator ON/OFFOutput logic ON/OFF
—5—
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CXA1929M
Pin DescriptionPinNo.ReferencePin VoltageTypical DCEquivalent circuitVCCDescription1Video-in2.5 V1Video inputVCC2Vreg3.1 V2Chip voltage supply regulator3NTSCAudio-in2.5 V3NTSC Audio input4PALAudio-in10 mA4PAL Audio input55FM-Tank4.0 VSound Carrier oscillator tank—6—
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CXA1929M
PinNo.ReferencePin VoltageTypical DCEquivalent circuitDescriptionVCC6Audio-Loop filter2.02 V6Sound Carrier FM tank loopfilter. See page 2 for set upnoteVCC8Xtal1.5 V84 MHz input crystal frequency10SCL5/0 V10I2C Clocking signal input11SDA5/0 V11I2C Data signal input13EF0.7 V13Charge pump output—7—
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CXA1929M
PinNo.ReferencePin VoltageTypical DCEquivalent circuitDescription1414PDout2.1 VPhase detector output151617181920OSC GNDOSC 1OSC 2OSC 3OSC 4OSC VCC0 V2.5 V1.7 V1.7 V2.5 V5.V1918171620VCO GroundUHF OSC15Oscillator supply Voltage 5 VMIXERFMOSC22Mod-Adj2.5 V22External Adjust Mod depth.24MIXER24RF-OUT3.4 VRF output.Must be terminated with 75 Ω.Application Circuit Notes1.RF output pin 24 should be connected to a 75 Ωload in order to measure accurate input level. Also note
pin 24 has 2.7 kΩto GND.
The output is measured using a spectrum analyzer.
2.After turning the device on, tune the variable inductor FM Tank so at the 6.5 MHz setting (set by I2C
control) the voltage on pin 6 should read 2.02 V
Set Fsound = 3Delta Fsound = 1
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CXA1929M
Specifications
Parameter
Operating temperature rangeModulation index
Diff. Gain 80 to 87.5 % modulationDiff. Gain 80 to 87.5 % modulationDeviation range (audio)Picture/sound ratio adjVideo modulation adjAudio FM sensitivityPicture/Sound ratioInter carrier accuracy
New Specification–10 to 80 °C77.5 to 90 %±6.5 %±6.5 degree±10 kHz to ±100 kHz1 dB ×7 steps2.5 % ×7 steps7 % ×7 steps1 dB ×7 steps
±1 kHz
Parameter
Current consumptionFull operationVCC= 5 V
DC Supply operating rangeOperating temperature range
Condition
AnalogdigitalOSC
Min.29316.04.5–10
Typ.36.638.67.55.0
Max.44479.0780UnitmAmAmAVdc°C
—9—
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CXA1929M
RF Characteristics
Parameter
Output impedanceOutput reture lossRF Output level
RF Frequency responePicture/Sound ratioVHF1 Frequency rangeVHF 2 Frequency rangeUHF Frequency range 1UHF Frequency range 2RF Accuracy
Inter-carrier frequency rangeInter-carrier accuracyRF Carrier phase noiseSound carrier phase noiseHum modulationChroma beatC/N Ratio
RF Harmonics
Sub-carrier harmonics
Reference spurious frequency.Spurious output levelATT driver ONATT driver OFF
Condition
Min.–7
700 MHz 75 ΩterminationUsing attached application
9.5501704706704.50
–84.7–84.7–74–63–65–60
3.70
3.90.0580.513.5
±2.5±117.5120230860800±506.5±1–80–80–60–65–60–15–58–55–654.20.1
Typ.75
Max.
UnitΩdBdBµVdBdBcMHzMHzMHzMHzkHzMHzkHzdBc/HzdBc/HzdBdBcdBdBcdBcdBcdBcVV
Using attached application4.5, 5.5, 6.0, 6.54.5, 5.5, 6.0, 6.5
10 kHz offset frequency10 kHz offset frequency
1/2 Video band offset
15.625 kHz
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CXA1929M
Video CharacteristicsParameter
Input resistanceInput voltage
% Modulation ClippingI2C control indexModulation flatnessModulation
Modulation stability by temperatureField time distortionLine time distortionS/N
K Factor
Video frequency responseTPSG modulationSync crush level
Condition
80 % Modulation
7 steps
Band Limited (46 CH to 60 CH)0.46 p-p input (mod Adja)mp (Ta = –10 to 80 °C)–mp (Ta = 25 °C)
Min.30
Typ.1000.4693280
Max.
UnitkΩVp-p%%%%%IREIREdB%dB%%
73
97±0.4±187±3
00
WeightedWith 2T pulsePer standardTPSG ON
0.50.5–66
0650
731
22–602±0.5815
Audio CharacteristicsParameter
Input VoltageInput resistanceDeviation rangeAudio distribution
Condition
@50 kHz, Deviation
Min.0.120±10
Typ.
Max.
UnitVp-pkΩkHz%kHz/mVkHz/mVkHz/mVkHz/mVdB%dBkHz
Deviation sensitivity
adj=(3)
Audio SNR
Harmonic distortionFrequency responseFM Hum and noise
4.5 MHzSystem M
4.5 MHz ±25 kHz=100 %=0 dBSystem B/G
5.5 MHz ±50 kHz=100 %=0 dBSystem I
6 MHz ±50 kHz=100 %=0 dBSystem D/K
6.5 MHz ±50 kHz=100 %=0 dBQuasi-Parallel, Detection50 to 100 %, Deviation50 to 15 kHz
25 to 75 kHz, Deviation
0
0.3540.2630.3340.399
0.4070.3030.3840.459
±100±150.4680.3480.4410.528–601+1±5
–1
—11—
Application Circuit 1RF OUTC1122pFC211nFC19220pFC221nFR1120k212019181716151413C240.01µFQ1C2720pFC13220pFC146pFC162pFC186pF1T363R10330L225nHR820kC251nFC230.047µFR12300R1656kGNDVCCAnalogC71nFR920kGNDGNDR610C622pF元器件交易网www.cecb2b.com
VCCOSCC122pFR12.7kP1242322EFOSC4OSC2RFOUTA-GNDVCO3OSC1MOD-ADJOSC-VCCANALOG-VOSC-GNDPDOUTR13200C261nFR152kC281nFVREGNTSCAUDIO-INPALAUDIO-INFMTANKALFXTALSCLVIDEOD-GNDD-VCCSDA1C100.01µFC922pFR7240C1247µFC1522nF4MHz-XtalR5180kL117µHC1727pF234567891011ATT driverOUT—12—
C200.1µFPALAUDIOGNDVCCSCLR1420012+30VR3100kR422kC20.33µFC422µF22kC322pFC8330pFInFVIDEO-inSDANTSCAUDIOCXA1929M
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility forany problems arising out of the use of these circuits or for any infringement of third party and other right due to same.Application Circuit 2Dual-OSCVCCAnalogGNDR12300GNDL = 14nH1T363R6101T363L214nHC146pFC20220pFR1120k15141316C173pFC196pFC231nFC250.01µFQ1C165pFL314nHR1020kR820kC221nFC261nFC240.047µFR1656kR920kC30220pFVCCOSCRF OUTGND元器件交易网www.cecb2b.com
C71nFC122pFC922pFC13220pF1918172120R12.7kC622pFP1242322C2920pFR13200R152kOSC4OSC2RFOUTA-GNDVCO3OSC1MOD-ADJOSC-VCCANALOG-VOSC-GNDPDOUTEFC271nFC281nFVREGNTSCAUDIO-INPALAUDIO-INFMTANKALFXTALSCLVIDEOD-GNDD-VCCSDAATT driverOUT—13—
4C110.01µFC1022pFR7240C1247µFC1522nF4MHz-XtalC210.1µFR5180kL117µHC1827pFR1420012356789101112+30VR422kC20.33µFC422µFInC322pF22kC8330pFVIDEOAUDIOPALGNDVCCSCLSDACXA1929M
NTSCAUDIOApplication circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility forany problems arising out of the use of these circuits or for any infringement of third party and other right due to same.Application Circuit 3VHF-BandRF OUTC221nFC20330pFC231nFR1120k212019181716151413C250.01µFQ1C261nFC240.047µFR12300GNDVCCAnalogC71nFVCCOSCR1020kC191nFGNDGNDR6101T363C1647pFC18120pFR9510L21µHR82C110k22pFC13330pFC14120pF元器件交易网www.cecb2b.com
C122pFR12.7kC622pF242322OSC4OSC2RFOUTA-GNDVCO3OSC1PDOUTEFR1656kMOD-ADJOSC-VCCOSC-GNDANALOG-VP1R13200C271nFC2920pFR152kVREGAUDIO-INNTSCAUDIO-INPALFMTANKALFXTALSCLVIDEOD-GNDD-VCCSDA1C100.01µFC922pFR7240C1247µFC1522nF4MHz-XtalR5180kL117µHC1727pF234567891011ATT driverOUT12—14—
C210.1µFAUDIOPALGNDVCCSCLC281nFR422kC20.33µFC422µFR14200C322pF22kC8330pFInF+30VVIDEOSDACXA1929M
NTSCAUDIOApplication circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility forany problems arising out of the use of these circuits or for any infringement of third party and other right due to same.元器件交易网www.cecb2b.com
CXA1929M
Example of Representative Characteristics
8281
80
79
78
4
5
6
VCC [V]
82
81
80
79
78
4
5
6
VCC [V]
2019
1817161514
A : 4.5MB : 5.5MAB4
5
6
VCC [V]
Video modulation [%]FM Sencitivity [kHz/mw]RF out [dBµV]0.60.5
0.4
0.34
5
6
VCC [V]
P/S Ratio [dB]3.33.2
3.1
3.0
2.9
45VCC [V]
695Video modulation [%]90858075Video max.Video 0.55Vp-p600700800900RF Frequency [MHz]
Regulatar out [V]—15—
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CXA1929M
0.400.35
Audio S/N [dB]Audio dist [%]0.300.250.200.15
696867666564
Without video Video 87.5%4
5
6
4
VCC [V]
5
VCC [V]
6
3.02.52.0
1.51.00.5
03.5
0–1
–2
–3
44.555.566.5
45VCC [V]
6
VCC [V]
1.00.5
Video out [dB]Audio out [dB]0–0.5–1.0–1.5–2.0
1.00.50–0.5–1.0–1.5–2.00
5
10
15
20
25
0100200Video f response [MHz]
Audio f response [kHz]
—16—
D.P [degree]DG [%]元器件交易网www.cecb2b.com
CXA1929M
8281
8079787776
–40
–20
0
20
40
60
80
100
Temperature [degree]
Video modulation [%]0
Over mod test = OFFVideo 0.8Vp-p20
Video modulation [%]40
60
80
100
0
64µsec0
20
40
60
80
100
Over mod test = ONVideo 0.8Vp-p0
64µsec
Video modulation [%]—17—
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CXA1929M
Package Outline Unit : mm
24PIN SOP (PLASTIC)
+ 0.415.0 – 0.1
24
13
+ 0.41.85 – 0.150.15+ 0.35.3 – 0.17.9 ± 0.4+ 0.20.1 – 0.050.45 ± 0.11.27
+ 0.10.2 – 0.05± 0.12MPACKAGE STRUCTURE
MOLDING COMPOUND
SONY CODEEIAJ CODEJEDEC CODE
SOP-24P-L01∗SOP024-P-0300-A
LEAD TREATMENTLEAD MATERIALPACKAGE WEIGHT
EPOXY/PHENOL RESINSOLDER PLATING
COPPER ALLOY / 42ALLOY
0.3g
—18—
0.5 ± 0.21126.9
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