Download: CXA3050M NICAM and SMATV RF MODULATOR/PLL

CXA3050M NICAM and SMATV RF MODULATOR/PLL

Description Fully synthesized I2C controlled UHF/VHF TV RF 24 pin SOP (Plastic) 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 125kHz steps Structure • Accepts NICAM 6.552MHz QPSK input signal Bipolar silicon monolithic IC • Accepts FM Stereo input signal • I2C control of: Applications a. Video RF Carrier Frequency • PAL and NTSC System VCR b. Sound Carrier Frequency • Satellite Receiver c. Modulation Depth (±2% Typ.) • Set Top Box d. FM Deviation (±8% Typ.) • SMATV e. P/S ratio (±1dB Typ.) f. Nicam output enable to sleep Recommended Operating Voltages (Ta = 25°C) g. Video RF carrier enable to sleep • Supply voltage VCC 5.0 ± 0.5 V • On chip Regulator 3.1V • Supply for VCO Varactor 30 ± 0.5 V • Operating Temperature –10 to +80 °C Block Diagram 24 23 22 21 20 19 18 17 16 15 14 13

NICAM

AMP MIXER

AMP

VIDEO VCO PLL

AMP MIXER TPSG

W/C-CLAMP

PLL

FM-OSC PLL I C-Interface REG OSC12345678910 11 12 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 – E96331A66-ST Video-in RF-OUT Vreg Analog GND Mod-adj NICAM-in Audio-in Analog VCC FM-Tank OSC VCC Audio-Loop OSC4 filter Digital GND OSC3 Xtal OSC2 Digital-VCC OSC1 SCL OSC GND SDA PDout NC EF, – 2 –

Multi-standard RF Modulator

Audio Loop Audio SMATV Analog Digital Digital Filter Tank Nicam in VCC Ground VCC Ground Audio in

NTSC NICAM

FM Mod P/S Switch Amp Mixer PLL control Audio in PAL Mixer RF Output62.5kHz B and RF Amp Adder Modulation A depth

B

Buffer Video in Video video Modulation × OSC2 clamp limiter depth C

D

divide8ALoop Loop filter Filter

B

SDA divide Phase divide 4MHz XTAL Memory M detector 25 OSC I2C Latch 4MHz

CCT SCL

B A 62.5kHz 250kHz B 4MHz Regulator V Reg

Fig. 1

, 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 4.5MHz (NTSC) or 5.5, 6.0, 6.5MHz (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 2.0V). 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 1dB steps between the range 10dB and 17dB (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 15.625kHz. The reference signal is derived from a 4MHz crystal oscillator feeding a –256 divider. The UHF oscillator covers the frequency range 471MHz to 855MHz in frequency steps of 125kHz. This is adequate for the UHF NTSC and PAL TV channels (471.25MHz (CH21) to 855.25MHz (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 6.522MHz Nicam signal subcarrier QPSK at 728K 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 –, I2C Interface Data Format Modulator Address1100100R/W ask over Data 1 PD ADJ1 ADJ0 S1 S0XXask mod Data 2 M12 M11 M10 M9 M8 M7 M6 M5 ask Data 3 M4 M3 M2 M1 M0 MD2 MD1 MD0 ask Data4XNIC FM2 FM1 FM0 PS2 PS1 PS0 ask Sound Carrier Course Adjust S1 S0 Sound Carrier TV System Frequency (Pre-emphasis) 0 0 4.5MHz NTSC015.5MHz PAL106.0MHz PAL116.5MHz PAL Sound Carrier Fine Adjust ADJ1 ADJ0 on chipdf Adjust capacitance00–f 6.4pF01Normal 3.2pF10+f 1.6pF11+f 0 PD RF Power on (RF Amp & OSC) 1 bit OVM Over Modulation Test 1 bit M12–MO Main divider control data 13 bits S1–S0 Sound carrier frequency selection 2 bits ADJ1–ADJ0 Sound carrier frequency adjust (0 to 6.4RF) 2 bits MD2–MD0 Modulation Depth 3 bits PS2–PS0 Picture/Sound control 3 bits FM FM deviation adjust 3 bits NIC Nicam Enable 1 bit M12 MO Main UHF PLL Divider MSB LSB 8191 to 2 Video Carrier frequency calculated from = 125 (M + 2) kHz – 4 –, Software Application Notes The minimum requirement to drive the CXA3050 and I2C bus drive is a 386/486 with 4M bytes hard disk space, 16MHz 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 Nominal Status Comments RF Output Power 1/0 Turns RF Amp, OSC on/off Delta Sound 1 Fine tune audio carrier Course adjust for 4.5MHz (0) Fsound 0 5.5MHz (1) 6.0MHz (2) 6.5MHz (3) Frequency mode Check listing on page 10 for2 to 8191 frequency to hex conversation Mod depth Ranges mod depth from4 72% to 86%, 80% (4) FM Deviation 4 Sensitivity adjustable P/S Ratio 4 Programmable in 8 steps of 1dB Nicam on/off 1/0 Nicam Mixer on Over Mod on/off 1/0 Increase Video modulation ratio – 5 –, Pin Description Pin Pin Voltage Reference Equivalent circuit Description No. Typical DC Vcc 1 Video-in 2.5V 1 Video input Vcc Chip voltage supply 2 Vreg 3.1V 2 regulator

MIXER FMOSC

3 External Adjust Mod 3 Mod-Adj 2.5V depth. 4 Audio-in 10mA Audio input Sound Carrier 5 FM-Tank 4.0V oscillator tank – 6 –, Pin Pin Voltage Reference Equivalent circuit Description No. Typical DC Vcc Sound Carrier FM tank Audio- 6 2.02V 6 loop filter. See page 2 Loop filter for set up note Vcc 4MHz input crystal 8 Xtal 1.5V frequency 10 I2C Clocking signal 10 SCL 5/0 V input 11 SDA 5/0 V I2C Data signal input 13 EF 0.7V Charge pump output – 7 –, Pin Pin Voltage Reference Equivalent circuit Description No. Typical DC 14 Phase detector 14 PDout 2.1V output 15 OSC GND 0V 20 VCO Ground 16 OSC1 2.5V UHF OSC 17 OSC2 1.7V 18 OSC3 1.7V 19 OSC4 2.5V 15 19 18 17 16 Oscillator supply 20 OSC VCC 5V Voltage 5V NICAM or FM 22 Nicam-in 2V carrier input

MIXER

24 RF output. 24 RF-OUT 3.4V Must be terminated with 75Ω. Application Circuit Notes 1. RF output pin 24 should be connected to a 75Ω load in oder to measure accurate input level. Also note pin 24 has 2.7kΩ 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 6.5MHz setting (set by I2C control) the voltage on pin 6 should read 2.02V. Set Fsound = 3 Delta Fsound = 1 – 8 –, Specifications Parameter New Specification Operating temperature range –10 to 80°C Modulation Index 77.5 to 90% Diff. Gain 80 to 87.5% modulation ±6.5% Diff. Gain 80 to 87.5% modulation ±6.5 degree Deviation range (audio) ±10kHz to ±100kHz NICAM input level 79dBµV NICAM input resistance 1kΩ Picture/sound ratio adj 1dB × 7steps Video modulation adj 2% × 7steps Audio FM sensitivity 8% × 7steps Picture/Sound ratio 1dB × 7steps Inter carrier accuracy ±1kHz Parameter Condition Min. Typ. Max. Unit Current consumption Analog 40 50 61.3 mA Full operation digital 20 25 30.6 mA VCC = 5.0V OSC 9.6 12 14.6 mA DC Supply operating range 4.5 5.0 7 Vdc Operating temperature range –10 75 °C Input level 79 dBµV Output level Conversion, Loss = 30dB –20 –22 –24 dBc Input resistance 1 KΩ Bit error rate 10e–9 10e–6 Eye-height degradation 10 % – 9 –, RF Characteristics Parameter Condition Min. Typ. Max. Unit Output impedance 75 Ω Output return loss –7 dB RF Output level 700MHz 75Ω termination 79 ±2.5 dBµV RF Frequency respone Using attached application ±1 dB Picture/Sound ratio 10 17 dBc VHF1 Frequency range 50 120 MHz VHF2 Frequency range 170 230 MHz UHF Frequency range 1 470 860 MHz UHF Frequency range 2 Using attached application 670 800 MHz RF Accuracy ±50 kHz Inter-carrier frequency range 4.5, 5.5, 6.0, 6.5 4.5 6.5 MHz Inter-carrier accuracy 4.5, 5.5, 6.0, 6.5 0 ±1 kHz RF Carrier phase noise 10kHz offset frequency –84.7 –80 dBc/Hz Sound carrier phase noise 10kHz offset frequency –84.7 –80 dBc/Hz Hum modulation –60 dB Chroma beat –78 –65 dBc C/N Ratio 1/2 Video band offset –63 –60 dB RF Harmonics –15 dBc Sub-carrier harmonics –60 dBc NICAM Beat –65 dBc Reference spurious frequency. 15.625kHz –60 –55 dBc Spurious output level –65 dBc – 10 –, Video Characteristics Parameter Condition Min. Typ. Max. Unit Input resistance 30 100 KΩ Input voltage 80% Modulation 0.55 Vp-p % Modulation Clipping 97 % I2C control index 7 steps 2 ±0.4 % Modulation flatness Band Limited (46CH to 60CH) ±1.4 % Modulation 0.55p-p input (mod Adja) 73 80 87 % Modulation stability by temperature mp (Ta = –10 to 80°C) ±3 % –mp (Ta = 25°C) Field time distortion 0 0.5 2 IRE Line time distortion 0 0.5 2 IRE S/N Weighted –60 dB K Factor With 2T pulse 2 % Video frequency response Per standard 0 ±0.5 dB Audio Characteristics Parameter Condition Min. Typ. Max. Unit Input voltage @50kHz, Deviation 0.1 Vp-p Input resistance 20 KΩ Deviation range ±10 ±100 kHz Audio distribution 4.5MHz 0 ±15 % System M 0.5 kHz/mV 4.5MHz ± 25kHz = 100% = 0dB System B/G 0.33 kHz/mV Deviation sensitivity 5.5MHz ± 50kHz = 100% = 0dB System I 0.404 kHz/mV 6MHz ± 50kHz = 100% = 0dB System D/K 0.404 kHz/mV 6.5MHz ± 50kHz = 100% = 0dB Audio SNR Quasi-Parallel, Detection –60 dB Harmonic distortion 50 to 100%, Deviation 1 % Frequency response 50 to 15kHz –1 +1 dB FM Hum and noise 25 to 75kHz, Deviation ±5 kHz – 11 –, – 12 –

Application Circuit 1

VCC VCC R9 GND GND RF OUT GND NICAM Analog OSC 20k C7 C25 1nF C11 R8 1nF R12 R6 20k C21 C2322pF 300 10 1nF 0.047µF C13 1T363 R10 L2 C19 R2 C6 330 25nH220pF 220pF C27 75 20pF C1 R1 22pF R16 C22 C24 Q1 C14 C16 C18 56k 22pF 2.7k 1nF 0.01µFC5 6pF 2pF 6pF 1nF R11 20k P1 24 23 22 21 20 19 18 17 16 15 14 13 R13 R15 200 2k C26 C28 1nF 1nF R1412345678910 11 12 +30V R3 C10R4 C17 100k 0.01µF22k L1 27pF C2 C4 C9 17µH 0.33µF 22µF 22pF R7 C3 C8 R5 C12 C15 330pF 180k 47µF 22nF 4MHz-Xtal22pF C20 0.1µF VIDEO AUDIO GND VCC SCL SDA 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 patent and other right due to same. VIDEO RFOUT VREG A-GND MOD-ADJ NICAM-IN AUDIO ANALOG-V TANK OSC-VCC ALF OSC4 D-GND VCO3 XTAL OSC2 D-VCC OSC1 SCL OSC-GND SDA PDOUT NC EF, – 13 –

Application Circuit 2 Dual-OSC

VCC VCC Analog OSC R9 C30 GND GND RF OUT GND NICAM L = 14nH 20k 220pF C7 C26 1nF 1T363 1nF R12 C22 C24 R6 R8 3001T363 1nF 0.047µF 10 20k L2 C16 R10 L3 R2 C6 14nH 5pF 20k 14nH C1 R1 22pF R16 C23 C25 Q1 C14 C17 C19 56k 22pF 2.7k C9 C13 C20 1nF 0.01µFC5 22pF 6pF 3pF 6pF220pF 220pF 1nF R11 20k P1 C29 24 23 22 21 20 19 18 17 16 15 14 13 20pF R13 R15 200 2k C27 C28 1nF 1nF R1412345678910 11 12 +30V R3 C11R4 C18 100k 0.01µF22k L1 27pF C2 C4 C10 17µH 0.33µF 22µF 22pF R7 C3 C8 R5 C12 C15 330pF 180k 47µF 22nF 4MHz-Xtal22pF C21 0.1µF VIDEO AUDIO GND VCC SCL SDA 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 patent and other right due to same. VIDEO RFOUT VREG A-GND MOD-ADJ NICAM-IN AUDIO ANALOG-V TANK OSC-VCC ALF OSC4 D-GND VCO3 XTAL OSC2 D-VCC OSC1 SCL OSC-GND SDA PDOUT NC EF, – 14 –

Application Circuit 3 VHF-Band

VCC VCC R10 C19 GND GND RF OUT GND NICAM Analog OSC 20k 1nF C7 C26 1nF R8 1nF R12 C11 20k C22 C24 R6 300 22pF 1nF 0.047µF C13 1T363 R9 L2 C20 R2 C6 330pF 510 1µH 330pF 75 Q1 C1 R1 22pF C23 C25C14 C16 C18 22pF 2.7k 1nF 0.01µFC5 120pF 47pF 120pF 1nF R11 20k 24 23 22 21 20 19 18 17 16 15 14 13 R16 56k P1 C29 20pF R13 R15 200 2k C27 1nF C2812345678910 11 12 1nF R3 C10R4 C17 100k 0.01µF22k L1 27pF R14 C2 C4 C9 17µH 200 0.33µF 22µF 22pF R7 C3 C8 R5 C12 C15 +30V 22pF 330pF 180k 47µF 22nF 4MHz-Xtal C21 0.1µF VIDEO AUDIO GND VCC SCL SDA 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 patent and other right due to same. VIDEO RFOUT VREG A-GND MOD-ADJ NICAM-IN AUDIO ANALOG-V TANK OSC-VCC ALF OSC4 D-GND VCO3 XTAL OSC2 D-VCC OSC1 SCL OSC-GND SDA PDOUT NC EF, Example of Representative Characteristics 80AAAAAAAAA 82AAAAAAAAA 79A A 81 A

A A A

78 80

A A A

77A A 79 A 76A A 78 A

A A AAAAAAAAA AA4AAA56456Vcc [V]AAAA AAAAVcAc [V] AAAA AAAAAAAAA 0.A6 AAAAAAAA

20A A : 4.5MAAA19 0.5

AAB: 5.5M18AAA

17A A 0.4A A

B

16AAAA

A A 0.A3 A AAAAAAAAA AAAAAAAAA

456456Vcc [V] Vcc [V] 3.3AAAAAAAAA 95AAAAAAAAA 3.2A A 90A A Video max. 3.1A A Video 0.55Vp-p85A A

AAAA

3.0 80

AAAA

2.9 75AAAA

AA4AAA5 AA6AA AA600 AA700AA80A0 AA900

Vcc [V] RF Frequency [MHz] – 15 – Regulatar out [V] P/S Ratio [dB] RF out [dBµV] Video modulation [%] FM Sencitivity [kHz/mw] Video modulation [%], 0.40AAAAAAAAAA69 AAAAAAAA

A Without video 0.35 AA68 A

Video 87.5% 0.30A AA67 A 0.25A AA66 A 0.20A AA65 A 0.15A AA64 A

AAAAAAAAAAAAAAAAAA

456456Vcc [V] Vcc [V] 3.0 0

AAAAAAAAAA AA

2.5

A AAA–1 AA

2.0

A AAA AA

1.5 –2

A AAA AA

1.0

A AAA–3 AA

0.5

A AAA AA

3A.5 A4 A4.5AA5 A5.5 A6A6.A5A456AA Vcc [V] Vcc [V] 1.0 1.0

AAAAAAAAAAAAAAAAAAA

0.5 0.5

A AAA A

0 0

A AAA A

–0.5 –0.5

A AAA A

–1.0 –1.0

A AAA A

–1.5 –1.5

A AAA A

–2.0 –2.0

A0 A5AA10 A15AA20 A2A5 A0AAAA100 AAA200AA

Video f response [MHz] Audio f response [kHz] – 16 – Video out [dB] DG [%] Audio dist [%] Audio out [dB] D.P [degree] Audio S/N [dB], 8A2 AAAAAAAA 8A1 A 8A0 A 7A9 A 7A8 A 7A7 A 7A6–40A–20A0A2A0 A40 A60 A80A100 Temperature [degree] Over mod test = OFF Video 0.8Vp-p 0 64µsec 0A AA Over mod test = ON

A Video 0.8Vp-p20 AA A AA

40A AA 60A AA

A AA A AA

100AAAAAAAAAAAA 0 64µsec – 17 – Video modulation [%] Video modulation [%] Video modulation [%],

Package Outline Unit: mm

24PIN SOP (PLASTIC) + 0.4 + 0.4 15.0 – 0.1 1.85 – 0.15 24 13 0.15 + 0.2 0.1 – 0.05 1 12 + 0.1 0.2 – 0.05 0.45 ± 0.1 1.27 ± 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 JEDEC CODE PACKAGE WEIGHT 0.3g – 18 – + 0.3 5.3 – 0.1 7.9 ± 0.4 6.9 0.5 ± 0.2]

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