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| CXA3250N All Band TV Tuner IC with On-chip PLL Description The CXA3250N is a monolithic TV tuner IC which integrates local oscillator and mixer circuits for VHF band, local oscillator and mixer circuits for UHF band, an IF amplifier and a tuning PLL onto a single chip, enabling further miniaturization of the tuner. Features * Low power consumption (5 V, 69 mA typ.) * Superior cross modulation * Balanced UHF oscillator (4 pins) with excellent oscillation stability * Supports both I2C and 3-wire bus modes * Automatic identification of 18, 19 or 27-bit control (during 3-wire bus mode) * On-chip A/D converter (during I2C bus mode) * On-chip high voltage drive transistor for charge pump * Reference frequency selectable from 31.25, 50 or 62.5 kHz (when using a 4 MHz crystal) * Low-phase noise synthesizer * On-chip 4-output band switch (supports output voltages from 5 to 9 V) Applications * TV tuners * VCR tuners * CATV tuners Structure Bipolar silicon monolithic IC 30 pin SSOP (Plastic) Absolute Maximum Ratings (Ta=25 C) * Supply voltage VCC1, VCC2 -0.3 to +5.5 V VCC3 -0.3 to +10.0 V * Storage temperature Tstg -55 to +150 C * Allowable power dissipation 580 mW PD (when mounted on a printed circuit board) Operating Conditions * Supply voltage VCC1, VCC2 4.75 to 5.30 VCC3 4.75 to 9.45 * Operating temperature Topr -25 to +75 V V C This IC has the pins whose electrostatic discharge strength is weak as the operating frequency is high and the high-frequency process is used for this IC. Take care of handling the IC. 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-- E98X34-TE CXA3250N Block Diagram and Pin Configuration 30 VCC3 CL 1 DA 2 ADSW 3 /CE BS3 4 BS1 5 BS2 6 BS4 7 VSW Mode Select V.REG Bias Programmable Divider 14/15bit Band SW Driver Phase Detector Charge Pump 28 CPO 27 VT LOCK 26 /ADC BUS Interface Shift Register Divider 1/64, 80, 128 REF OSC ADC 29 REFOSC LOCK Det 25 IFOUT VCC1 8 24 GND2 IF AMP Buffer 23 VCC2 MIXout1 9 MIXout2 10 GND1 11 22 UOSCB2 UHF OSC 21 UOSCE2 20 UOSCE1 19 UOSCB1 Buffer BYP/MS 12 VHFin 13 VHF MIX 18 VOSC2 Buffer UHFin1 14 UHFin2 15 VHF UHF MIX VHF OSC 17 GND 16 VOSC1 --2-- CXA3250N Pin Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Symbol CL DA CE/ADSW BS3 BS1 BS2 BS4 VCC1 MIXOUT1 MIXOU2 GND1 BYP/MS VHFIN UHFIN1 UHFIN2 VOSC1 GND VOSC2 UOSCB1 UOSCE1 UOSCE2 UOSCB2 VCC2 GND2 IFOUT LOCK/ADC VT CPO REFOSC VCC3 Description CLOCK/SCL (I2C bus) DATA/SDA (I2C bus) Enable/address selection (I2C bus) Band switch output 3 Band switch output 1 Band switch output 2 Band switch output 4 Analog circuit VCC MIX output MIX output Analog circuit GND VHF input GND and control bus switching VHF input UHF input UHF input VHF oscillator (base input) GND VHF oscillator (collector output) UHF oscillator (base pin) UHF oscillator (emitter pin) UHF oscillator (emitter pin) UHF oscillator (base pin) PLL circuit VCC PLL circuit GND IF output LOCK signal output/ADC input (I2C bus) VC drive voltage output (open collector) Charge pump output (loop filter connection) Crystal connection Band switch power supply --3-- CXA3250N Pin Description and Equivalent Circuit Pin No. Symbol Pin voltage [V] 23 Equivalent circuit Description 1 CL -- 1 5.1k 5p Clock input. 23 2 DA -- 2 5.1k Data input. 5p 20 23 150k 3 ADSW/CE 1.25 (when open) 3 50k 5p I2C bus setting : Address selection. Bits 1 and 2 of the address byte are controlled. 3-wire bus setting : Enable input. 30 4 BS3 4 7 7 BS4 ON : 4.8 OFF : 0.0 30 Band switch outputs. The pin corresponding to the selected band goes High. 5 BS1 5 6 12k 6 BS2 25k 8 VCC1 -- -- --4-- Analog circuit power supply. CXA3250N Pin No. Symbol Pin voltage [V] 9 Equivalent circuit Description 10 9 MIXOUT1 -- 10 MIXOUT2 -- Mixer output. These pins output the signal with open collector, and they must be connected to the power supply via the load. 11 GND1 -- 3.8 during VHF reception 3.8 during UHF reception 2.4 during VHF reception 2.6 during UHF reception 2.3 during UHF reception 2.6 during VHF reception 2.3 during UHF reception 2.6 during VHF reception 2.1 during VHF reception 2.3 during UHF reception 4.2 during VHF reception 5.0 during UHF reception -- -- Analog circuit GND. 8 13 3k 23 15p 3k 76k 24k 12 BYP/MS Pin 12 : VHF input grounding and control bus switching. Pin 13 : VHF input. Input format is the unbalanced input. 13 VHFin 12 8 14 15 3k 3k 14 UHFin1 15 UHFin2 UHF inputs. Input the signal to Pins 14 and 15 symmetrically or ground either of Pin 14 or 15 with the capacitor and input the signal to the rest. 8 400 50 16 3k 3k 18 16 VOSC1 External resonance circuit connection for VHF oscillator. 18 VOSC2 17 GND -- GND for separating the analog and PLL systems. --5-- CXA3250N Pin No. Symbol 19 UOSCB1 20 UOSCE1 21 UOSCE2 22 UOSCB2 23 24 VCC2 GND2 Pin voltage [V] 2.1 during UHF reception 2.3 during VHF reception 1.4 during UHF reception 1.8 during VHF reception 1.4 during UHF reception 1.8 during VHF reception 2.1 during UHF reception 2.3 during VHF reception -- -- Equivalent circuit Description 8 22 21 20 19 3k 3k External resonance circuit connection for UHF oscillator. -- -- 8 PLL circuit power supply. PLL circuit GND. 25 IFOUT 2.8 15 25 IF output. 23 26 LOCK/ADC -- 250 26 500k I2C bus setting : 5-level A/D converter input. 3-wire bus setting : Lock detection. Low when locked, High when unlocked. --6-- CXA3250N Pin No. Symbol Pin voltage [V] Equivalent circuit Description Varicap drive voltage output. This pin outputs the signal with open collector, and this must be connected to the tuning power supply via the load. 27 VT -- 23 28 27 70 28 CPO 2.0 Charge pump output. Connects the loop filter. 60k 30p 29 30p 29 REFOSC 4.3 Crystal connection for reference oscillator. 30 VCC3 -- -- Power supply for external supply. --7-- CXA3250N Electrical Characteristics Circuit Current Item Circuit current A Symbol AICCV AICCU Circuit current D DICC Measurement conditions VCC1 current, band switch output open during VHF operation VCC1 current, band switch output open during UHF operation VCC2 current Min. 37 39 10 Typ. 50 53 16 (VCC=5 V, Ta=25 C) Max. 67 71 22 Unit mA mA mA OSC/MIX/IF Amplifier Block Symbol CG1 CG2 CG3 CG4 Noise figure 1, 2 NF1 NF2 NF3 NF4 1, 3 1 % cross CM1 modulation CM2 CM3 CM4 Maximum output Pomax power Switch ON drift 4 fsw1 fsw2 fsw3 fsw4 Item Conversion gain Measurement conditions VHF operation fRF=55 MHz VHF operation fRF=360 MHz UHF operation fRF=360 MHz UHF operation fRF=800 MHz VHF operation fRF=55 MHz VHF operation fRF=360 MHz UHF operation fRF=360 MHz UHF operation fRF=800 MHz VHF operation fD=55 MHz, fUD=12 MHz VHF operation fD=360 MHz, fUD=12 MHz UHF operation fD=360 MHz, fUD=12 MHz UHF operation fD=800 MHz, fUD=12 MHz 50 load saturation output VHF operation fOSC=100 MHz f from 3 s to 3 min after switch ON VHF operation fOSC=405 MHz f from 3 s to 3 min after switch ON UHF operation fOSC=405 MHz f from 3 s to 3 min after switch ON UHF operation fOSC=845 MHz f from 3 s to 3 min after switch ON Min. 19 21 23 24 Typ. 22 24 26 27 12 12 10 10 101 101 96 95 +10 300 600 350 350 Max. 25 27 29 30 15 15 13 13 Unit dB dB dB dB dB dB dB dB dB dB dB dB dBm kHz kHz kHz kHz 97 97 92 91 +7 --8-- CXA3250N Item Supply voltage drift Symbol 4 fst1 fst2 fst3 fst4 Oscillator phase noise Reference leak Lock-up time C/N V C/N U REFL LUT 1 LUT 2 Measurement conditions VHF operation fOSC=100 MHz f when VCC 5 V changes 5 % VHF operation fOSC=405 MHz f when VCC 5 V changes 5 % UHF operation fOSC=405 MHz f when VCC 5 V changes 5 % UHF operation fOSC=845 MHz f when VCC 5 V changes 5 % 10 kHz offset 10 kHz offset Phase comparison frequency of 62.5 kHz, CP : 1 VHF operation fOSC=95 MHz fOSC=395 MHz CP : 1 UHF operation fOSC=413 MHz fOSC=847 MHz CP : 1 Min. Typ. Max. 200 250 150 150 Unit kHz kHz kHz kHz dBc/Hz dB 82 78 55 34 36 70 ms 70 1 Value measured with untuned input. 2 NF meter direct-reading value (DSB measurement). 3 Value with a desired reception signal input level of -30 dBm, an interference signal of 100 kHz/30 % AM, and an interference signal level where S/I=46 dB measured with a spectrum analyzer. 4 Value when the PLL is not operating. --9-- CXA3250N PLL Block Item CL, DA and CE pins "H" level input voltage "L" level input voltage "H" level input current "L" level input current CPO (charge pump) Output current 1 Leak current 1 Output current 2 Leak current 2 VT (VC voltage output) Maximum output voltage Minimum output voltage LOCK "H" output voltage "L" output voltage REFOSC Oscillation frequency range Input capacitance Negative resistance Band SW Output current Saturation voltage Leak current Bus timing (I2C bus) SCL clock frequency Start waiting time Start hold time "L" hold time "H" hold time Start setup time Data hold time Data setup time Rise time Fall time Stop setup time Bus timing (3-wire bus) Data setup time Data hold time Enable waiting time Enable setup time Enable hold time Symbol VIH VIL IIH IIL ICPO1 LeakCP1 ICPO2 LeakCP2 VTH VTL VLOCKH VLOCKL FXTOSC CXTOSC RNEG IBS VSAT LeakBS fSCL tWSTA tHSTA tLOW tHIGH tSSTA tHDAT tSDAT tR tF tSSTO tSD tHD tWE tSE tHE --10-- When locked When unlocked VCC-0.5 0 3 22 Crystal source impedance When ON When ON Source current=20 mA When OFF 0 1300 600 1300 600 600 0 600 VIH=VCC VIL=GND Byte4/bit6=0 Byte4/bit6=0 Byte4/bit6=1 Byte4/bit6=1 35 140 Measurement conditions Min. 3 GND 0 -2 50 200 Typ. Max. VCC 1.5 -0.1 -4 75 30 300 100 33 0.8 VCC 0.5 12 26 -0.7 -25 240 3 400 Unit V V A A A nA A nA V V V V MHz pF k mA mV A kHz ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns 0.5 24 -1.4 120 0.5 900 300 300 600 300 600 300 300 600 CXA3250N Electrical Characteristics Measurement Circuit (I2C bus control) +30V 22k 8200p 1.2k 6.8k 0.047 100p +5V 2.2 1n 2.6 2.5t ADC in IF OUT 33p 47k 47k 3.2 5.5t 3.2 2.5t 1n 47k 51 BVL 1n 47k 51 BVH 0.75p 1T363 0.5p 0.5p 7p 1T363 150p 47k 1T363 XTAL 4MHz 100p 30 VCC3 29 REFOSC 28 CPO 27 VT 26 LOCK/ADC 1n 47k 47k 56p 6p 2p 21 UOSCE2 20 UOSCE1 56p 6p 19 UOSCB1 18 VOSC2 1p 1n 1T362 20 16p 47k 25 IFOUT 24 GND2 23 VCC2 22 UOSCB2 17 GND UHF in1 14 1n 1n 16 VOSC1 15 UHF in2 1n UHF IN CXA3250N CE/ADSW MIX out1 MIX out2 BYP/MS 12 1 2 3 4 5 6 7 VCC1 BS3 BS1 BS2 BS4 DA CL 8 9 2k 4.5t 10 11 13 4.5t SCL SDA ADSW 56p 56p FMT BVL BVH BU 100 1n VHF IN 2.2 +5V 1n --11-- VHF in GND1 CXA3250N Electrical Characteristics Measurement Circuit (3-wire bus control) +30V 22k 8200p 1.2k 6.8k 0.047 100p +5V 2.2 1n 2.6 2.5t ADC in IF OUT 33p 47k 47k 3.2 5.5t 3.2 2.5t 1n 47k 51 BVL 1n 47k 51 BVH 0.75p 1T363 0.5p 0.5p 7p 1T363 150p 47k 1T363 XTAL 4MHz 100p 30 VCC3 29 REFOSC 28 CPO 27 VT 26 LOCK/ADC 1n 47k 47k 56p 6p 2p 21 UOSCE2 20 UOSCE1 56p 6p 19 UOSCB1 18 VOSC2 1p 1n 1T362 20 16p 47k 25 IFOUT 24 GND2 23 VCC2 22 UOSCB2 17 GND UHF in1 14 1n 1n 16 VOSC1 15 UHF in2 1n UHF IN CXA3250N CE/ADSW MIX out1 MIX out2 BYP/MS 12 1n 1 2 3 4 5 6 7 8 9 2k 4.5t 10 11 13 4.5t SCL SDA ENABLE 56p 56p FMT BVL BVH BU 100 1n VHF IN 2.2 +5V 1n --12-- VHF in GND1 VCC1 BS3 BS1 BS2 BS4 DA CL CXA3250N Application Circuit (I2C bus control) +30V 2.2 100p 8200p 22k 10k 51 10n 3.2 5.5t 10k 1n 10 1T363 2 1.5t 3.2 2.5t 1n 47k 1.2k 2.2n 2.2n 6.8k 0.047 10k 2P IF OUT 1.2 1n 47k 1.2k 0.75p 0.5p 15p 100p 10k 1T363 XTAL 4MHz 2.2n 100p 30 VCC3 29 REFOSC 28 CPO 27 VT 26 LOCK/ADC 10k 10P 1p 1n 16p 3p 21 UOSCE2 20 UOSCE1 1n 6p 19 UOSCB1 18 VOSC2 17 GND 1n 1T362 20 16p 16 VOSC1 10k 25 IFOUT 24 GND2 23 VCC2 CXA3250N 22 UOSCB2 MIX out1 CE/ADSW MIX out2 BYP/MS UHF in1 14 1n 1 220 220 2 3 4 5 6 7 8 9 2k 10 11 12 13 15 UHF in2 2P UHF 450nH 3k 100 28p 6.8H 1n 56p 56p 1n 2.2 SCL SDA ADSW FMT BVL BVH BU +5V VHF 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. --13-- VHF in 100P GND1 VCC1 BS3 BS1 BS2 BS4 DA CL CXA3250N Application Circuit (3-wire bus control) +30V 2.2 100p 8200p 22k 10k 51 10n 3.2 5.5t 10k 1n 10 1T363 2 1.5t 3.2 2.5t 1n 47k 1.2k 2.2n 2.2n 6.8k 0.047 10k 2P IF OUT 1.2 1n 47k 1.2k 0.75p 0.5p 15p 100p 10k 1T363 XTAL 4MHz 2.2n 100p 30 VCC3 29 REFOSC 28 CPO 27 VT 26 LOCK/ADC 10k 10P 1p 1n 16p 3p 21 UOSCE2 20 UOSCE1 1n 6p 19 UOSCB1 18 VOSC2 17 GND 1n 1T362 20 16p 16 VOSC1 10k 25 IFOUT 24 GND2 23 VCC2 CXA3250N 22 UOSCB2 MIX out1 CE/ADSW MIX out2 BYP/MS UHF in1 14 1n 1 220 220 2 3 4 5 6 7 VCC1 BS3 BS1 BS2 BS4 DA CL 8 9 2k 10 11 12 13 15 UHF in2 2P UHF 1n 450nH 3k 100 28p 6.8H 1n 56p 56p 1n 2.2 SCL SDA ENABLE FMT BVL BVH BU +5V VHF 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. --14-- VHF in 100P GND1 CXA3250N Description of Functions The CXA3250N is a ground wave broadcast tuner IC which converts frequencies to IF in order to tune and detect only the desired reception frequency of VHF, CATV and UHF band signals. In addition to the mixer, local oscillation and IF amplifier circuits required for frequency conversion to IF, this IC also integrates a PLL circuit for local oscillation frequency control onto a single chip. The functions of the various circuits are described below. 1. Mixer circuit This circuit outputs the frequency difference between the signal input to VHFIN or UHFIN and the local oscillation signal. 2. Local oscillation circuit A VCO is formed by externally connecting an LC resonance circuit composed of a varicap diode and inductance. 3. IF amplifier circuit This circuit amplifies the mixer IF output, and consists of an amplifier stage and low impedance output stage. 4. PLL circuit This PLL circuit fixes the local oscillation frequency to the desired frequency. It consists of a programmable divider, reference divider, phase comparator, charge pump and reference oscillator. The control format supports both the I2C bus and 3-wire bus formats. During I2C bus control, the frequency steps of 31.25, 50 or 62.5 kHz can be selected by the data-based reference divider frequency division setting value. During 3-wire bus control, these frequency steps can be selected by the combination of the communication word length (18 or 19 bits) and the voltage applied to the BYP/MS pin. 5. Band switch circuit The CXA3250N has four sets of built-in PNP transistors for switching between the VL, VH and UHF bands and for switching the FM trap, etc. These PNP transistors can be controlled by the bus data. The emitters for these PNP transistors are connected to an independent power supply pin (VCC3) from the oscillator, mixer and PLL circuits, and support either 5 V or 9 V as the RF amplifier power supply. --15-- CXA3250N Description of Analog Block Operation (See the Electrical Characteristics Measurement Circuit.) VHF oscillator circuit * This circuit is a differential amplifier type oscillator circuit. Pin 18 is the output and Pin 16 is the input. Oscillation is performed by connecting an LC resonance circuit including a varicap to Pin 18 via coupled capacitance, inputting to Pin 16 with feedback capacitance, and applying positive feedback. * The amplifier between Pins 16 and 18 has an extremely high gain. Therefore, care should be taken to avoid creating parasitic capacitance, resistance or other feedback loops as this may produce abnormal oscillation. VHF mixer circuit * The mixer circuit employs a double balanced mixer with little local oscillation signal leakage. The input format is base input type, with Pin 12 grounded via a capacitor and the RF signal input to Pin 13. (Pin 12 can also be used to switch the PLL mode according to the applied DC voltage value.) * The RF signal is fed from the oscillator, converted to IF frequency and output from Pins 9 and 10. UHF oscillator circuit * This oscillator circuit is designed so that two collector ground type Colpitts oscillators perform differential oscillation operation via an LC resonance circuit including a varicap. * Resonance capacitance is connected between Pins 19 and 20, Pins 20 and 21, and Pins 21 and 22, and an LC resonance circuit including a varicap is connected between Pins 19 and 22. UHF mixer circuit * This circuit employs a double balanced mixer like the VHF mixer circuit. The input format is base input type, with Pins 14 and 15 as the RF input pins. The input method can be selected from balanced input consisting of differential input to Pins 14 and 15 or unbalanced input consisting of grounding Pin 14 via a capacitor and input to Pin 15. * Pins 9 and 10 are the mixer outputs. IF amplifier circuit * The signals frequency converted by the mixer are output from Pins 9 and 10, and at the same time are AC coupled inside the IC and input to the IF amplifier. * Single-tuned filters are connected to Pins 9 and 10 in order to improve the interference characteristics of the IF amplifier. * The signal amplified by the IF amplifier is output from Pin 25. The output impedance is approximately 75 . --16-- CXA3250N Description of PLL Block This IC supports both I2C bus and 3-wire bus control. The I2C bus conforms to the standard I2C bus format, and bidirectional bus control is possible consisting of a write mode in which various data are received and a read mode in which various data are sent. The 3-wire bus is equipped with an 18- or 19-bit auto identify function, and the frequency step can be switched according to the voltage applied to the BYP/MS pin. The PLL of this IC does not have a fixed frequency division circuit and performs high-speed phase comparison, providing low reference leak and quick lock-up time characteristics. During power-on (VCC2), the power-on reset circuit operates to initialize the frequency data to all "0" and the band data to all "OFF". Power-on reset is performed when Vcc2=2.5 V at room temperature (Ta=25 C). Pin Function Table Symbol CL DA ADSW/CE LOCK/ADC I2C bus SCL input SDA I/O Address selection ADC input 3-wire bus CLOCK input DATA input ENABLE input LOCK output 1.) PLL Mode Setting Method The selected control bus is set according to the BYP/MS pin (Pin 12) voltage. BYP/MS pin GND OPEN VCC Control bus I2C bus 3-wire bus 3-wire bus During 3-wire bus control, the transferred bit length (18, 19 or 27 bits) is automatically identified. During 18- or 19-bit transfer, the frequency steps in the table below are set according to the combination of the BYP/MS pin voltage and the bit length. This IC does not have a fixed frequency division circuit, so the phase comparison frequency becomes the frequency step. BYP/MS pin voltage OPEN OPEN OPEN or VCC VCC VCC Reference divider 64 128 Selectable from 64, 80 or 128 80 80 Phase comparison frequency 62.5 kHz 31.25 kHz 62.5 kHz/ 50.0 kHz/ 31.25 kHz 50.0 kHz 50.0 kHz Frequency step 62.5 kHz 31.25 kHz 62.5 kHz/ 50.0 kHz/ 31.25 kHz 50.0 kHz 50.0 kHz Transfer bit length 18 19 27 18 19 Phase comparison frequency and frequency step are for when the crystal oscillation=4 MHz. --17-- CXA3250N 2.) Programming The VCO lock frequency is obtained according to the following formula. fosc=fref x (32 M + S) fosc : local oscillator frequency fref : phase comparison frequency M : main divider frequency division ratio S : swallow counter frequency division ratio The variable frequency division ranges of M and S are as follows, and are set as binary. S < M 1023 (S < M 511 during 18-bit transfer) 0 S 31 3.) I2C Bus Control This IC conforms to the standard I2C bus format, and bidirectional bus control is possible consisting of a write mode in which various data are received and a read mode in which various data are sent. Write and read modes are recognized according to the setting of the final bit (R/W bit) of the address byte. Write mode is set when the R/W bit is "0" and read mode is set when the R/W bit is "1". --18-- CXA3250N 3-1) Address settings Up to four addresses can be selected by the hardware bit settings, so that multiple PLL can exist within one system. The responding address can be set according to the ADSW/CE pin voltage. Address 1 1 0 0 0 MA1 MA0 R/W Hardware bits CE pin voltage 0 to 0.1 VCC OPEN or 0.2 VCC to 0.3 VCC 0.4 VCC to 0.6 VCC 0.9 VCC to VCC MA1 0 0 1 1 MA0 0 1 0 1 3-2) Write mode Write mode is used to receive various data. In this mode, byte 1 contains the address data, bytes 2 and 3 contain the frequency data, byte 4 contains the control data, and byte 5 contains the band switch data. These data are latch transferred in the manner of byte 1, byte 2 + byte 3, and byte 4 + byte 5. When the correct address is received and acknowledged, the data is recognized as frequency data if the first bit of the next byte is "0", and as control data and band switch data if this bit is "1". Also, when data transmission is stopped part-way, the previously programmed data is valid. Therefore, once the control and band switch data have been programmed, 3-byte commands consisting of the address and frequency data are possible. Further, even if the I 2C bus stop conditions are not met, data can be input by sending the start conditions and the new address. --19-- CXA3250N The control format is as shown in the table below. Write-mode : Slave Receiver MSB bit7 1 0 M2 1 X bit6 1 M9 M1 CP X bit5 0 M8 M0 0 X bit4 0 M7 S4 CD X bit3 0 M6 S3 X BS4 bit2 MA1 M5 S2 R1 BS3 bit1 MA0 M4 S1 R0 BS2 LSB bit0 0 M3 S0 OS BS1 MODE Address byte Divider byte 1 Divider byte 2 Control byte Band SW byte X : Don't care A A A A A A : MA0, MA1 : M0 to : S0 to : CD : OS : CP : BS1 to BS4 : R0, R1 : Acknowledge bit address setting main divider frequency division ratio setting swallow counter frequency division ratio setting charge pump OFF (when "1") varicap output OFF (when "1") charge pump current switching (200 A when "1", 50 A when "0") band switch control (output PNP transistor ON when "1") reference divider frequency division ratio setting. See the Reference Divider Frequency Division Ratio Table. Reference Divider Frequency Division Ratio Table R1 0 1 X X : Don't care R0 1 1 0 Reference divider 128 64 80 --20-- CXA3250N 3-3) Read mode In read mode, the phase comparator locked/unlocked status and 5-level A/D converter input pin voltage status are transmitted and output to the master. The read data format is as shown in the table below. Read mode : Slave Transmitter bit7 1 X bit6 1 FL bit5 0 1 bit4 0 1 bit3 0 1 bit2 MA1 A2 bit1 MA0 A1 bit0 0 A0 A A MODE Address byte Status byte A MA0, MA1 FL A0 to A1 : : : : Acknowledge bit address setting lock detection signal (1: locked, 0: unlocked) A/D converter (See the table below.) 5-level A/D Converter Output Table Voltage applied to LOCK/ADC pin 0.6 VCC2 to VCC2 0.45 VCC2 to 0.6 VCC2 0.3 VCC2 to 0.45 VCC2 0.15 VCC2 to 0.3 VCC2 0 to 0.15 VCC2 A1 1 0 0 0 0 A1 0 1 1 0 0 A0 0 1 0 1 0 --21-- CXA3250N 4.) 3-Wire Bus Control The following transfer bit length formats are automatically identified during 3-wire bus control. 18 bits : Band data (4 bits) + frequency data (14 bits) 19 bits : Band data (4 bits) + frequency data (15 bits) 27 bits : Band data (4 bits) + frequency data (15 bits) + test data (8 bits) 4-1) 18-bit data transfer Data is loaded at the rising edge of the clock signal while the enable signal is high, and is latched at the falling edge of the enable signal. The clocks during the enable period are counted, and when 18 bits have been loaded, the programmable divider "M9" data is set to "0" and the reference divider frequency division ratio is automatically set to "1/80" when the BYP/MS pin voltage is VCC or to "1/64" when the BYP/MS pin is DC open. 18-bit data format Invalid data Band switch data BS4 BS3 BS2 BS1 M8 DATA 1 CLOCK 4 5 18 M7 M6 M5 M4 Frequency data M3 M2 M1 M0 S4 S3 S2 S1 S0 Invalid data ENABLE Time Latch 4-2) 19-bit data transfer Data is loaded at the rising edge of the clock signal while the enable signal is high, and is latched at the falling edge of the enable signal. The clocks during the enable period are counted, and when 19 bits have been loaded, the reference divider frequency division ratio is automatically set to "1/80" when the BYP/MS pin voltage is VCC or to "1/128" when the BYP/MS pin is DC open. 19-bit data format Invalid data Band switch data BS4 BS3 BS2 BS1 M9 DATA 1 CLOCK 4 5 19 M8 M7 M6 M5 M4 Frequency data M3 M2 M1 M0 S4 S3 S2 S1 S0 Invalid data ENABLE Time Latch --22-- CXA3250N 4-3) 27-bit data transfer The 3-wire bus also automatically supports the 27-bit format in which various control data are transferred in addition to the band and frequency data. Data is loaded at the rising edge of the clock signal while the enable signal is high, and is latched at the falling edge of the enable signal. The clocks during the enable period are counted, and 27 bits of data as counted from the rising edge of the enable signal are loaded as valid data. 27-bit data format Invalid data Band switch data BS4 BS3 BS2 BS1 M9 DATA 1 CLOCK 4 5 19 20 27 M8 Frequency data S3 S2 S1 S0 X CP Test data CD X R1 R0 X Invalid data ENABLE Time Latch M0 to : S0 to : CD : OS : CP : BS1 to BS4 : R0, R1 : main divider frequency division ratio setting swallow counter frequency division ratio setting charge pump OFF (when "1") varicap output OFF (when "1") charge pump current switching (200 A when "1", 50 A when "0") band switch control (output PNP transistor ON when "1") Reference divider frequency division ratio setting. Reference Divider Frequency Division Ratio Table R1 0 1 X X : Don't care R0 1 1 0 Reference divider 128 64 80 --23-- CXA3250N I2C Bus Timing Chart tWSTA SDA tR tF tSSTO tSSTA SCL tHSTA START tLOW tHIGH tSDAT tHDAT STOP CLOCK DATACHANGE tSSTA=Start setup time tWSTA=Start waiting time tHSTA=Start hold time tLOW=LOW clock pulse width tHIGH=HIGH clock pulse width tSDAT=Data setup time tHDAT=Data hold time tSSTO=Stop setup time tR =Rise time tF =Fall time 3-Wire Bus Timing Chart tSD tHD DATA 3V 1.5V CLOCK 3V 1.5V ENABLE 3V 1.5V tWE tSE tHE tSD=Data setup time tHD=Data hold time tSE=Enable setup time tHE=Enable hold time tWE=Enable waiting time --24-- CXA3250N Example of Representative Characteristics Circuit current vs. Supply voltage 1 60 58 56 54 52 50 48 46 44 42 40 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 10 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 UHF DICC-Circuit current [mA] AICC-Circuit current [mA] 20 Circuit current vs. Supply voltage 2 VHF 15 VCC1-Supply voltage [V] Band SW output voltage vs. Output current (BS1, BS2, BS3, BS4) 9.2 9.0 8.8 8.6 5.0 4.8 4.6 4.4 0 5 10 15 20 25 Output current [mA] I/O characteristics (Untuned input) 20 VCC2-Supply voltage [V] Band SW output voltage vs. Output current 9.2 9.0 8.8 8.6 5.0 4.8 4.6 4.4 0 1 2 3 4 5 6 Output current [mA] VCC3=5V VCC3=9V VCC3=9V Output voltage [V] 10 20 Output voltage [V] VCC3=5V 0 IF output level [dBm] -20 fRF=100MHz (VHF) fRF=450MHz (UHF) fIF is both f=45MHz -40 -60 -60 -50 -40 -30 -20 -10 0 RF level [dBm] --25-- CXA3250N Conversion gain vs. Reception frequency (Untuned input) 40 fIF=45MHz CG-Conversion gain [dB] Noise figure vs. Reception frequency (Untuned input, in DSB) 20 fIF=45MHz UHF VHF (Low) NF-Noise figure [dB] 30 15 VHF (Low) VHF (High) UHF 10 20 VHF (High) 10 5 0 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] Next adjacent cross modulation vs. Reception frequency (Untuned input) 120 CM-Cross modulation [dB] 100 80 60 40 20 0 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] fIF=45MHz fUD=fD+12MHz fUD=fD-12MHz (100kHz, 30%AM) 0 0 100 200 300 400 500 600 700 800 900 Reception frequency [MHz] Oscillation frequency power supply fluctuation (PLL off) 400 300 200 VHF (Low) VHF (High) +B drift [kHz] 100 UHF 0 -100 -200 -300 -400 0 100 200 300 400 500 600 700 800 900 Oscillation frequency [MHz] VCC+5% VCC-5% (VCC=5V) PCS beat characteristics +20 +10 0 fIF -10 IF output level [dBm] -20 -30 -40 -50 -60 -70 -80 -30 -20 -10 0 +10 +20 SG output level [dBm] (fP level) fLocal=129MHz fP=83.25MHz fC=86.83MHz (fP-12dB) fS=87.75MHz (fP-1.7dB) fIF=45.75MHz fBeat=fIF920kHz fBeat --26-- CXA3250N Tuning Response Time 1 VHF (Low) 95MHz VHF (High) 395MHz CP=1 T=34msec 5.0V/div offset 10.0V -40,0000ms 10,0000ms 10,0ms/div 60,0000ms real time CP=0 T=68msec 5.0V/div offset 10.0V -130,000ms 20,0000ms 30,0ms/div 170,000ms real time --27-- CXA3250N Tuning Response Time 2 UHF 413MHz UHF 847MHz CP=1 T=36msec 5.0V/div offset 10.0V -40,0000ms 10,0000ms 10,0ms/div 60,0000ms real time CP=0 T=87msec 5.0V/div offset 10.0V -70,0000ms 30,0000ms 20,0ms/div 130,000ms real time --28-- CXA3250N Tuning Response Time 3 VHF (High) 395MHz VHF (Low) 95MHz CP=1 T=22msec 5.0V/div offset 10.0V -40,0000ms 10,0000ms 10,0ms/div 60,0000ms real time CP=0 T=34msec 5.0V/div offset 10.0V -100,000ms 0,00000s 20,0ms/div 100,000ms real time --29-- CXA3250N Tuning Response Time 4 UHF 847MHz UHF 413MHz CP=1 T=20msec 5.0V/div offset 10.0V -90,0000ms 10,0000ms 20,0ms/div 110,000ms real time CP=0 T=50msec 5.0V/div offset 10.0V -100,000ms 0,00000s 20,0ms/div 100,000ms real time --30-- CXA3250N IF output spectrum 10dB/div VHF (Low) fRF=55MHz fL.0=100MHz RF input level : -40dBm CENTER 45.0MHz #RES BW 1.0kHz #VBW 10Hz SPAN 100.0kHz SWP 30.0 sec IF output spectrum 10dB/div VHF (High) fRF=350MHz fL.0=395MHz RF input level : -40dBm CENTER 45.0MHz RES BW 1.0kHz #VBW 10Hz SPAN 100.0kHz SWP 30.0 sec --31-- CXA3250N IF output spectrum 10dB/div UHF fRF=800MHz fL.0=845MHz RF input level : -40dBm CENTER 45.0 270MHz #RES BW 1.0kHz #VBW 10Hz SPAN 100.0kHz SWP 30.0 sec --32-- CXA3250N VHF Input Impedance j50 j25 j100 BYP/MS 0 50 12 50MHz 1000p 13 VHFin S11 15 UHFin2 S11 350MHz -j100 -j25 -j50 UHF Input Impedance j50 j25 j100 0 50 14 350MHz -j25 -j100 800MHz -j50 --33-- UHFin1 CXA3250N IF Output Impedance j50 j25 j100 45MHz 38MHz 0 50 -j25 -j100 -j50 --34-- CXA3250N Package Outline Unit : mm 30PIN SSOP (PLASTIC) + 0.2 1.25 - 0.1 9.7 0.1 0.10 30 16 5.6 0.1 A 1 + 0.1 0.22 - 0.05 0.13 M 15 0.65 + 0.05 0.15 - 0.02 0.1 0.1 0 to 10 NOTE: Dimension "" does not include mold protrusion. DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SSOP-30P-L01 SSOP030-P-0056 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). --35-- 0.5 0.2 7.6 0.2 |
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