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CXA3068N L-band Down Converter for Satellite Tuner Description The CXA3068N is a monolithic IC to down-convert the L-band (930 to 2150 MHz) signal for the satellite broadcasting receiver. It has a double-balanced mixer, local oscillator circuit and IF amplifier on chip. Features * Balance-type Colpitts oscillator circuit provides a stable and wide range oscillation. Oscillation frequency : 2.63 GHz * Small leak of the local oscillation signal due to the double-balanced mixer. * Oscillation frequency drift is small, caused by the change of impedance at the pre-stage of RF input. * * * * Local oscillator output circuit for PLL. Single 5 V power supply operation. Low current consumption. ICC=53 mA (typ.) 16-pin SSOP package contributes to reduction in set size. 16 pin SSOP (Plastic) Absolute Maximum Ratings (Ta=25 C) * Supply voltage VCC -0.3 to +5.5 V * Storage temperature Tstg -55 to +150 C * Allowable power dissipation PD 625 mW (When mounted on board) Operating Conditions * Supply voltage * Ambient temperature VCC Topr 4.75 to 5.3 V -20 to 75 C Applications * Satellite broadcasting tuners for BS, CS, DSS and DVB. (Frequency conversion to the second IF) Structure Bipolar silicon monolithic IC OSCOUT1 Block Diagram and Pin Configuration OSCB1 OSCB2 GND1 VCC1 NC NC GND1 10 16 15 14 13 12 11 9 OSC BUFF IF AMP MIX 1 IFOUT 2 VCC2 3 GND2 4 GND2 5 RFIN1 6 RFIN2 7 GND1 8 OSCOUT2 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-- E95Z07-TE CXA3068N Pin Description and Equivalent Circuit Pin No. Symbol Typical pin voltage (V) Equivalent circuit VCC2 Description 2 1 IF OUT 2.5 1 IF output. 2 3 4 VCC2 GND2 GND2 5.0 0 0 IF block power supply. IF block GND. IF block GND. 5 RF IN1 1.8 5 2k 2k 6 RF input. Normally, a decoupling capacitor is connected at Pin 5 to GND and Pin 6 is used for input. 6 RF IN2 1.8 7 GND1 0 VCC1 RF block GND. 16 8 OSC OUT2 3.5 9 40 40 Local oscillation output. 8 9 OSC OUT1 3.5 --2-- CXA3068N Pin No. 10 Symbol GND1 Typical pin voltage (V) 0 Equivalent circuit Description RF block GND. 11 OSC B2 2.4 14 11 12 NC -- Oscillator. 13 NC -- 2k 2k 14 OSC B1 2.4 15 16 GND1 VCC1 0 5.0 RF block GND. RF block power supply. --3-- CXA3068N Electrical Characteristics (Ta=25 C, VCC=5 V, refer to the Electrical Characteristics Measurement Circuit.) Input frequency: 950 to 2150 MHz No Item 1 Current consumption 2 Conversion gain 1 Measurement conditions No signal fin = 950 MHz, fIF = 480 MHz fin = 1450 MHz, fIF = 480 MHz fin = 2150 MHz, fIF = 480 MHz fin = 950 MHz, fIF = 480 MHz fin = 1450 MHz, fIF = 480 MHz fin = 2150 MHz, fIF = 480 MHz fOSC = 1430 to 1830 MHz fOSC = 1830 to 2230 MHz fOSC = 2230 to 2630 MHz fIF = 480 MHz fOSC = 1430 to 1830 MHz fOSC = 1830 to 2230 MHz fOSC = 2230 to 2630 MHz fOSC = 1430 to 1830 MHz fOSC = 1830 to 2230 MHz fOSC = 2230 to 2630 MHz Pin = -25 dBm fin = 950 MHz + 960 MHz IM3 fout = 470 MHz + 480 MHz S/I of 460 MHz and 480 MHz fOSC=1430 MHz, offset 10 kHz CN1 fOSC=1430 MHz, offset 100 kHz CN2 IFVSWR f = 480 MHz f = 950 MHz r C Symbol ICC CG1 CG2 CG3 NF1 NF2 NF3 POSC1 POSC2 POSC3 PO (sat) RFLK1 RFLK2 RFLK3 IFLK1 IFLK2 IFLK3 Min. Typ. Max. 31.0 53.0 75.0 16 19 23 18 21 25 19 22 26 16 19 14 16 14 16 -10 -6 -10 -6 -11 -7 5.5 8.5 11.0 -20 -20 -20 -20 -32 -32 Unit mA dB dB dB dB dB dB dBm dBm dBm dBm dBm dBm dBm dBm dBm dBm 3 Noise figure 1, 2 4 Local oscillation output 5 IF maximum output 6 RF pin local oscillation leakage IF pin local oscillation leakage Third-order intermodulation distortion 1, 3 7 8 45.0 dB Local oscillation phase noise 10 IF output VSWR 9 11 RF input impedance 74 95 1.2 140 5 dBc/Hz dBc/Hz pF 1) Measured value for untuned inputs. 2) Noise figure is uncorrected for image. 3) Measure S/I of the desired intermediate frequency (480 MHz) and distortion component (460 MHz) with a spectrum analyzer, assuming input level of the reception frequency to be -25 dBm (when IC input pin is converted for 50 ). --4-- Electrical Characteristics Measurement Circuit VC 1T379 1T379 20k 10k 10k 1n 1n +5V 16 15 14 13 12 11 10 47p 47p 9 OSCOUT2 OSCOUT1 NC VCC1 GND1 NC OSCB1 CXA3068N OSCB2 IF OUT 1 VCC2 2 GND2 3 GND2 4 RFIN1 5 RFIN2 6 7 GND1 GND1 1n 1n 100p 100p 1n CXA3068N IFout 6P --5-- RFin 8 LOout CXA3068N Description of Operation (Refer to the Electrical Characteristics Measurement Circuit.) 1) Oscillator circuit The oscillator circuit is formed with two Colpitts oscillators, and oscillation is provided at the differential input via an LC resonance circuit including a varicap diode. This is oscillated only by attaching an LC resonance circuit externally because feedback capacitance, etc. are built in for oscillation. 2) Mixer circuit This is a double-balance mixer having small leak of local oscillation signal. The RF signal is input to Pins 5 and 6. In normal use, the signal is input to one pin while the other pin is connected to GND via decoupling capacitor. 3) IF amplifier circuit The mixer output signal is amplified by the IF amplifier and output to Pin 1. The IF output is emitterfollower output and output impedance is approximately 50 (480 MHz). 4) PLL oscillation signal output circuit The output circuit is built in to drive the PLL for tuning. This is emitter-follower output and output impedance is approximately 50 . --6-- CXA3068N Current consumption vs. Supply voltage Conversion gain vs. Reception frequency (untuned input) 25 fIF = 480MHz Current consumption [mA] 60 20 55 Conversion gain 4.7 5.0 Supply voltage [V] 5.3 15 50 45 10 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 Reception frequency [GHz] Noise figure vs. Reception frequency (untuned input, in DSB) 24 fIF = 480MHz 20 Local oscillation output level vs. Local oscillation frequency +5 Local oscillation output level [dBm] 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 0 Noise figure [dB] 16 -5 12 -10 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 Reception frequency [GHz] Local oscillation frequency [GHz] --7-- CXA3068N IF pin local oscillation leak vs. Local oscillation frequency -20 RF pin oscillation frequency leak vs. Local oscillation frequency -20 -30 RF pin oscillation frequency leak [dBm] 1.6 1.8 2.0 2.2 2.4 2.6 2.8 IF pin local oscillation leak [dBm] -30 -40 -40 -50 -50 -60 -60 1.4 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 Local oscillation frequency [GHz] Local oscillation frequency [GHz] Input/output characteristics (untuned input) +10 0 -10 = Fundamental-frequency (480MHz) = Third-harmonics (470MHz) IF output level [dBm] -20 -30 -50 -40 -60 -70 -50 -40 -30 -20 -10 0 RF input level [dBm] (935MHz, 940MHz) --8-- CXA3068N Input Impedance 2150MHz j50 j25 j100 j150 j10 j250 0 50 -j10 -j250 -j150 5 1450MHz -j25 -j100 S11 6 7 8 -j50 950MHz --9-- CXA3068N Output Impedance (IF) j50 400MHz j25 480MHz j100 j150 j10 j250 0 50 -j10 -j250 -j150 1 -j25 -j100 S11 2 3 -j50 Output Impedance (local oscillation output) j50 j25 2630MHz j100 j150 j10 j250 0 50 -j10 -j250 11 -j150 10 9 6 -j25 -j100 7 8 -j50 S11 1430MHZ --10-- CXA3068N Package Outline Unit : mm 16PIN SSOP (PLASTIC) 5.0 0.1 + 0.2 1.25 - 0.1 0.1 16 9 A 4.4 0.1 1 + 0.1 0.22 - 0.05 8 0.65 0.12 + 0.05 0.15 - 0.02 0.1 0.1 0 to 10 DETAIL A NOTE: Dimension "" does not include mold protrusion. PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SSOP-16P-L01 SSOP016-P-0044 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.1g --11-- 0.5 0.2 6.4 0.2 |
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