CXA1929M TV RF MODULATOR/PLL For the availability of this product, please contact the sales office. Description Fully synthesized I2C controlled UHF/VHF TV RF Modulator compatible with PAL and NTSC video formats. Features • Minimal adjustment of external components • For use on VHF and UHF TV Frequencies • Video RF carrier frequency programmable in 125 kHz steps • ATT Driver • I2C control of: a. Video RF Carrier Frequency b. 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 sleep g. 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 voltage VCC 5.0±0.5 V • Supply for VCO Varactor –30 to +0.5 °C • Operating Temperature –10 to +80 °C RF-OUT Analog GND MOD-adj Analog VCC OSC VCC OSC4 OSC3 OSC2 OSC1 OSC GND PDout EF Block Diagram 24 23 22 21 20 19 18 17 16 15 14 13 AMP VIDEO MIXER AMP PLL VCO TPSG W/C-CLAMP FM-OSC PLL I2C-Interface PLL REG ATT Driver Vreg NTSC Audio-in PAL Audio-in FM-Tank Audio-Loop filter 7 8 9 10 11 12 A-driver 6 SDA 5 SCL 4 Digital-VCC 3 Xtal 2 Digital GND 1 Video-in OSC Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E96514-TE —2— SCL SDA Video in Modulation depth Audio in PAL Audio in NTSC B I2C Video clamp TPSG OSC 4MHz Switch Multi-standard RF Modulator Memory Latch CCT video limiter 62.5kHz B Amp Audio Tank Driver out ATT Driver Modulation depth FM Mod PLL Audio Loop Filter V Reg Regulator P/S control divide M divide 8 Phase detector Buffer ×2 Mixer and Adder A 62.5kHz 250kHz B divide 25 RF Amp Analog VCC Ground 4MHz OSC Loop Filter OSC Digital VCC Digital Ground 4MHz XTAL B Loop filter D A C B A RF Output CXA1929M 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 modulation depth adjustment circuit. By means of three allocated I2C control bits it is possible to adjust the modulation depth from a nominal 74 % to 86% in 2.0 % steps. Modulation depth can also be controlled externally by addition of an external resistor on pin3. The video signal is then passed through to the mixer. In the mixer stage, both the video composite signal and FM sound carrier amplitude modulate the RF carrier from the UHF OSC, 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 the approximate 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, where upon the FM phase locked loop will lock the VCO onto the exact centre frequency. Minimum distortion of the FM 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 capacitance variations from one batch to another. This is achieved by fine adjustment of Delta fsound via I2C control. The design 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 controls the picture to sound power ratio (P/S). This signal is then fed into the RF amp. Hence at the RF output the P/S ratio can be programmed in 1 dB steps between the range 10 dB and 17 dB (see Electrical Characteristics). 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 VCO output passes through a prescaler (≈8) followed by an I2C controlled programmable divider (≈M), and then phase compared with that of a reference signal at 15.625 kHz. The reference signal is derived from a 4 MHz crystal oscillator feeding a –256 divider. The UHF oscillator covers the frequency range 471 MHz to 855 MHz in 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 adjustment to 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 is then buffered and feed into a separate mixer (controlled via VCO). This then feeds to the RF amp with the composite video and audio. The I2C control will switch the Nicam signal output off or on. —3— CXA1929M I2C Interface Data format Modulator Address Data 1 Data 2 Data 3 Data 4 1 RF M12 M4 — 1 ADJ1 M11 M3 OSC 0 ADJ0 M10 M2 FM2 0 S1 M9 M1 FM1 1 S0 M8 M0 FM0 0 TPSG M7 MD2 PS2 Sound Carrier Course Adjust S1 S0 0 0 1 1 0 1 0 1 Sound Carrier Frequency 4.5 MHz 5.5 MHz 6.0 MHz 6.5 MHz TV System (Pre-emphasis) NTSC PAL PAL PAL Sound Carrier Fine Adjust ADJ1 ADJ0 df Adjust 0 0 1 1 0 1 0 1 –f Normal +f +f on chip capacitance 6.4 pF 3.2 pF 1.6 pF 0 RF RF Power on (RF Amp & RF Mixer Driver) TPSG TEST Pattern Signal Generator ATT Local/distance external attenuator driver OSC Oscillator ON/OFF switch OVM Over Modulation Test M12–MO Main divider control data S1–S0 Sound carrier frequency selection ADJ1–ADJ0 Sound carrier frequency adjust (0 to 6.4 RF) MD2–MD0 Modulation Depth PS2–PS0 Picture/Sound control FM FM deviation adjust M12 MO Main UHF PLL Divider MSB LSB 8191 to 2 Video Carrier frequency calculated from = 125 (M+2) kHz —4— 1 bit 1 bit 1 bit 1 bit 1 bit 13 bits 2 bits 2 bits 3 bits 3 bits 3 bits 0 OVM M6 MD1 PS1 R/W ATT M5 MD0 PS0 ask ask ask ask ask CXA1929M Software Application Notes The minimum requirement to drive the CXA3050 and I2C bus drive is a 386/486 with 4 M bytes hard disk space, 16 MHz clock speed and running DOS5.00 or above. Insert the disc into the drive and type TESTS and at the prompt type iic. At this there should appear a single list of user friendly functional tests that can be changed by keyboard manipulation. As an aid the test list is written below. Note Page up increments the status, page down decrements the status. Function RF Output Power Delta Sound Fsound Frequency mode Mod depth Normal Status 1/0 1 0 2 to 8191 4 Comments Turns RF Amp on/off Fine tune audio carrier Course adjust for 4.5 MHz (0) 5.5 MHz (1) 6.0 MHz (2) 6.5 MHz (3) Check listing on page 10 for frequency to hex conversation Ranges mod depth from 72 % to (4) Sensitivity adjustable Programmable in 8 steps of 1 dB Increase Video modulation ratio Sets internal test pattern generator ON/OFF FM deviation P/S Ratio Over Mod 4 4 1/0 TPSG 1/0 OSC on. 1/0 Turns oscillator ON/OFF Attenuator Driver 1/0 Output logic ON/OFF —5— CXA1929M Pin Description Pin No. Reference Pin Voltage Typical DC Equivalent circuit Description VCC 1 Video-in 2.5 V Video input 1 VCC 2 Vreg 3.1 V 3 NTSC Audio-in 2.5 V PAL Audio-in 10 mA 4 2 Chip voltage supply regulator NTSC Audio input 3 PAL Audio input 4 5 5 FM-Tank 4.0 V Sound Carrier oscillator tank —6— CXA1929M Pin No. Reference Pin Voltage Typical DC Equivalent circuit Description VCC 6 AudioLoop filter 2.02 V Sound Carrier FM tank loop filter. See page 2 for set up note 6 VCC 8 Xtal 1.5 V 4 MHz input crystal frequency 8 10 SCL 5/0 V 11 SDA 5/0 V 13 EF 0.7 V 10 I2C Clocking signal input 11 I2C Data signal input 13 Charge pump output —7— CXA1929M Pin No. Reference Pin Voltage Typical DC 14 PDout 2.1 V 15 OSC GND 0V 16 OSC 1 2.5 V 17 OSC 2 1.7 V 18 OSC 3 1.7 V 19 OSC 4 2.5 V 20 OSC VCC 5.V Equivalent circuit Description 14 Phase detector output 20 UHF OSC 15 19 18 17 16 MIXER 22 Mod-Adj 2.5 V RF-OUT 3.4 V Oscillator supply Voltage 5 V FMOSC 22 24 24 VCO Ground External Adjust Mod depth. MIXER RF output. Must be terminated with 75 Ω. Application Circuit Notes 1. RF output pin 24 should be connected to a 75 Ω load in order to measure accurate input level. Also note pin 24 has 2.7 kΩ to 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 = 3 Delta Fsound = 1 —8— CXA1929M Specifications Parameter Operating temperature range Modulation index Diff. Gain 80 to 87.5 % modulation Diff. Gain 80 to 87.5 % modulation Deviation range (audio) Picture/sound ratio adj Video modulation adj Audio FM sensitivity Picture/Sound ratio Inter carrier accuracy Parameter Current consumption Full operation VCC = 5 V DC Supply operating range Operating temperature range New Specification –10 to 80 °C 77.5 to 90 % ±6.5 % ±6.5 degree ±10 kHz to ±100 kHz 1 dB × 7 steps 2.5 % × 7 steps 7 % × 7 steps 1 dB × 7 steps ±1 kHz Condition Analog digital OSC —9— Min. 29 31 6.0 4.5 –10 Typ. 36.6 38.6 7.5 5.0 Max. 44 47 9.0 7 80 Unit mA mA mA Vdc °C CXA1929M RF Characteristics Parameter Output impedance Output reture loss RF Output level RF Frequency respone Picture/Sound ratio VHF1 Frequency range VHF 2 Frequency range UHF Frequency range 1 UHF Frequency range 2 RF Accuracy Inter-carrier frequency range Inter-carrier accuracy RF Carrier phase noise Sound carrier phase noise Hum modulation Chroma beat C/N Ratio RF Harmonics Sub-carrier harmonics Reference spurious frequency. Spurious output level ATT driver ON ATT driver OFF Condition Min. Typ. 75 Max. 80.5 ±2.5 ±1 17.5 120 230 860 800 ±50 6.5 ±1 –80 –80 –60 –65 –60 –15 –58 –55 –65 4.2 0.1 –7 700 MHz 75 Ω termination Using attached application Using attached application 4.5, 5.5, 6.0, 6.5 4.5, 5.5, 6.0, 6.5 10 kHz offset frequency 10 kHz offset frequency 9.5 50 170 470 670 13.5 4.5 0 –84.7 –84.7 1/2 Video band offset –74 –63 15.625 kHz –65 –60 3.7 0 —10— 3.9 0.05 Unit Ω dB dBµV dB dBc MHz MHz MHz MHz kHz MHz kHz dBc/Hz dBc/Hz dB dBc dB dBc dBc dBc dBc V V CXA1929M Video Characteristics Parameter Input resistance Input voltage % Modulation Clipping I2C control index Modulation flatness Modulation Modulation stability by temperature Field time distortion Line time distortion S/N K Factor Video frequency response TPSG modulation Sync crush level Condition Min. 30 97 ±0.4 ±1 87 Unit kΩ Vp-p % % % % ±3 % 73 1 2 2 –60 2 ±0.5 81 5 IRE IRE dB % dB % % Typ. Max. 0 ±100 ±15 Unit Vp-p kΩ kHz % 0.354 0.407 0.468 kHz/mV 0.263 0.303 0.348 kHz/mV 0.334 0.384 0.441 kHz/mV 0.399 0.459 0.528 kHz/mV –60 1 +1 ±5 dB % dB kHz 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) 73 0 0 Weighted With 2T pulse Per standard TPSG ON 0 65 0 Typ. 100 0.46 93 2 80 0.5 0.5 –66 Max. Audio Characteristics Parameter Input Voltage Input resistance Deviation range Audio distribution Deviation sensitivity adj=(3) Audio SNR Harmonic distortion Frequency response FM Hum and noise Condition @50 kHz, Deviation 4.5 MHz System M 4.5 MHz ±25 kHz=100 %=0 dB System B/G 5.5 MHz ±50 kHz=100 %=0 dB System I 6 MHz ±50 kHz=100 %=0 dB System D/K 6.5 MHz ±50 kHz=100 %=0 dB Quasi-Parallel, Detection 50 to 100 %, Deviation 50 to 15 kHz 25 to 75 kHz, Deviation —11— Min. 0.1 20 ±10 –1 C3 22pF VIDEO-in 3 22k NTSC AUDIO C4 22µF R4 22k L1 17µH PAL AUDIO R5 180k C9 22pF C10 0.01µF FM TANK 5 C12 47µF R7 240 ALF 6 GND C15 22nF D-GND 7 XTAL VCC 9 D-VCC 4MHz-Xtal 8 SCL SCL C20 0.1µF 10 SDA 11 SDA 12 InF R12 300 C28 1nF C26 1nF +30V R14 200 R15 2k R16 56k GND R13 200 P1 C27 20pF Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party and other right due to same. C8 330pF 4 C17 27pF RFOUT 2 A-GND 1 13 14 15 16 17 MOD-ADJ Q1 18 R11 20k C24 0.01µF C22 1nF ANALOG-V C19 220pF 19 C18 6pF L2 25nH C21 1nF 20 C16 2pF R10 330 C25 1nF C23 0.047µF 21 C14 6pF 1T363 GND OSC-VCC 22 R3 100k C13 220pF C11 22pF R8 20k R9 20k OSC4 23 R6 10 VCC OSC VCO3 24 R1 2.7k C6 22pF VCC Analog C7 1nF OSC2 C2 0.33µF C1 22pF GND OSC1 VIDEO —12— VREG OSC-GND NTSC AUDIO-IN PDOUT PAL AUDIO-IN EF ATT driver OUT RF OUT Application Circuit 1 CXA1929M C3 22pF VIDEO 3 22k NTSC AUDIO C4 22µF 2 1 AUDIO PAL R5 180k C10 22pF C11 0.01µF 5 C12 47µF R7 240 L1 17µH 6 GND C15 22nF 7 C18 27pF 9 VCC 4MHz-Xtal 8 SCL C21 0.1µF SDA 11 12 In R12 300 GND R15 2k C28 1nF R13 200 C27 1nF +30V R14 200 C29 20pF P1 R16 56k Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party and other right due to same. C8 330pF 4 10 13 14 15 16 17 Q1 18 R4 22k C23 1nF R11 20k C25 0.01µF C22 1nF 19 C20 220pF C26 1nF C24 0.047µF 20 C19 6pF R10 20k GND 21 C13 220pF C17 3pF L3 14nH 1T363 C30 220pF 22 C9 22pF C14 6pF L2 14nH C16 5pF R9 20k 23 C6 22pF R6 10 R8 20k 1T363 L = 14nH 24 R1 2.7k C7 1nF VCC OSC RFOUT C2 0.33µF C1 22pF GND VCC Analog A-GND VIDEO MOD-ADJ VREG ANALOG-V NTSC AUDIO-IN OSC-VCC PAL AUDIO-IN OSC4 FM TANK VCO3 ALF OSC2 D-GND OSC1 XTAL OSC-GND D-VCC PDOUT SCL —13— SDA EF ATT driver OUT RF OUT Application Circuit 2 Dual-OSC CXA1929M C3 22pF C4 22µF VIDEO NTSC AUDIO 22k 3 AUDIO PAL R5 180k C9 22pF C10 0.01µF FM TANK 5 C12 47µF R7 240 ALF 6 GND C15 22nF D-GND 7 XTAL VCC 9 D-VCC 4MHz-Xtal 8 SCL SCL C21 0.1µF 10 SDA 11 SDA 12 InF R12 300 C27 1nF R13 200 P1 GND +30V R14 200 C28 1nF R15 2k C29 20pF R16 56k Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party and other right due to same. C8 330pF 4 C17 27pF RFOUT 2 A-GND 1 13 14 15 16 17 18 MOD-ADJ Q1 19 L1 17µH C23 1nF R11 20k C25 0.01µF C22 1nF ANALOG-V C20 330pF C26 1nF C24 0.047µF 20 C18 120pF L2 1µH GND 21 C16 47pF R9 510 C19 1nF OSC-VCC 22 R4 22k 1T363 C14 120pF R8 C11 20k 22pF C13 330pF R10 20k OSC4 23 R6 10 VCC OSC VCO3 24 R1 2.7k C6 22pF VCC Analog C7 1nF OSC2 C2 0.33µF C1 22pF GND OSC1 VIDEO —14— VREG OSC-GND AUDIO-IN NTSC PDOUT AUDIO-IN PAL EF ATT driver OUT RF OUT Application Circuit 3 VHF-Band CXA1929M CXA1929M AA AAAAAAAAA AA AAAAAAAAA A A AA AA A A AA AA A A AAAAAAAAAAAAA AAAAAAAAA A AAAAAAAAA A AAAAAAAAAA A AAAAAAAAA A A AA AA AA A A AA AA AA A A AAAAAAAAAAAAA AAAAAAAAAAA A A 82 82 81 81 Video modulation [%] RF out [dBµV] Example of Representative Characteristics 80 79 80 79 78 78 4 5 4 6 5 6 VCC [V] VCC [V] 0.6 20 P/S Ratio [dB] FM Sencitivity [kHz/mw] A : 4.5M 19 B : 5.5M A 18 17 B 16 15 0.5 0.4 0.3 14 4 5 6 4 6 VCC [V] AA AAAAAAAAA AA AA AA AA AA AAAAAAAAAAA AA AAAAAAAAA A A AA A A AA A A AAAAAAAAAA A 3.3 95 3.2 90 3.1 3.0 2.9 4 5 VCC [V] Video modulation [%] Regulatar out [V] VCC [V] 5 Video max. Video 0.55Vp-p 85 80 75 6 —15— 600 700 800 RF Frequency [MHz] 900 CXA1929M AA AAAAAAAAA AAAAAAAAAAAA A A A AA AAAA AA AA AAAA AA AAAAAAAAAAAAAAAAAAAAAA AAAAAAAAA AA AAAAAAAAAA AA A AA AA AA A AA AA A AA AA AA A AA AA A AA AAAAAAAAAAA AA A AA AAA AA AAAAAAAAAA A AAAAAAAAAA AA A AA AAAA A AA A AA AAAA A AA A AAAAAAAAAAAAAAA A AAAAAAAAAAA AA 69 0.40 Without video 0.35 68 Audio S/N [dB] Audio dist [%] Video 87.5% 0.30 0.25 0.20 67 66 65 64 0.15 4 5 4 6 5 VCC [V] VCC [V] 3.0 6 0 2.5 –1 D.P [degree] DG [%] 2.0 1.5 1.0 –2 –3 0.5 0 3.5 4 4.5 5 5.5 6 6.5 4 0 –0.5 –1.0 –1.5 –2.0 1.0 0.5 Audio out [dB] Video out [dB] 0.5 6 VCC [V] VCC [V] 1.0 5 0 –0.5 –1.0 –1.5 –2.0 0 5 10 15 20 25 0 100 Audio f response [kHz] Video f response [MHz] —16— 200 CXA1929M AA AAAAAAAAA AA AA AA AA AA AAAAAAAAAAA 82 Video modulation [%] 81 80 79 78 77 76 –40 –20 0 20 40 60 80 100 Temperature [degree] 0 Over mod test = OFF Video 0.8Vp-p Video modulation [%] 20 40 60 80 100 64µsec 0 0 AA AA AA AA AA AA AA AA AA AAAAAAAAAAAA AA A AA Over mod test = ON Video 0.8Vp-p Video modulation [%] 20 40 60 80 100 64µsec 0 —17— CXA1929M Unit : mm 24PIN SOP (PLASTIC) + 0.4 15.0 – 0.1 24 + 0.4 1.85 – 0.15 13 6.9 + 0.2 0.1 – 0.05 12 0.45 ± 0.1 1.27 + 0.1 0.2 – 0.05 0.5 ± 0.2 1 7.9 ± 0.4 0.15 + 0.3 5.3 – 0.1 Package Outline ± 0.12 M PACKAGE STRUCTURE MOLDING COMPOUND EPOXY/PHENOL RESIN SONY CODE SOP-24P-L01 LEAD TREATMENT SOLDER PLATING EIAJ CODE ∗SOP024-P-0300-A LEAD MATERIAL COPPER ALLOY / 42ALLOY PACKAGE WEIGHT 0.3g JEDEC CODE —18—