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. 16 pin SSOP (Plastic) 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. • • • • 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) 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. Operating Conditions • Supply voltage VCC • Ambient temperature 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 VCC1 GND1 OSCB1 NC NC OSCB2 GND1 OSCOUT1 Block Diagram and Pin Configuration 16 15 14 13 12 11 10 9 OSC BUFF MIX VCC2 GND2 GND2 5 6 7 8 OSCOUT2 4 GND1 3 RFIN2 2 RFIN1 1 IFOUT IF AMP 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 1 IF OUT 2.5 2 VCC2 5.0 3 GND2 0 IF block GND. 4 GND2 0 IF block GND. 5 RF IN1 1.8 IF block power supply. 5 6 2k 6 RF IN2 1.8 7 GND1 0 2k OSC OUT2 16 3.5 9 40 40 8 9 OSC OUT1 RF input. Normally, a decoupling capacitor is connected at Pin 5 to GND and Pin 6 is used for input. RF block GND. VCC1 8 IF output. 3.5 —2— Local oscillation output. CXA3068N Pin No. Symbol Typical pin voltage (V) 10 GND1 0 11 OSC B2 2.4 Equivalent circuit RF block GND. 14 12 NC Description 11 — Oscillator. 13 NC — 14 OSC B1 2.4 15 GND1 0 16 VCC1 5.0 2k 2k 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 3 Noise figure ∗1, 2 4 Local oscillation output 5 IF maximum output 6 RF pin local oscillation leakage 7 IF pin local oscillation leakage 8 Third-order intermodulation distortion ∗1, 3 Local oscillation phase noise 10 IF output VSWR 9 11 RF input impedance Symbol ICC CG1 CG2 CG3 NF1 NF2 NF3 POSC1 POSC2 POSC3 PO (sat) RFLK1 RFLK2 RFLK3 IFLK1 IFLK2 IFLK3 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 rπ Cπ 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 45.0 dB 74 95 1.2 140 5 dBc/Hz dBc/Hz Ω 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 Ω). —4— 1n 10k IFout 1 2 4 3 CXA3068N 5 100p RFin 6 8 7 9 10 11 12 13 10k 1T379 VCC1 IF OUT GND1 VCC2 14 6P 15 1n OSCB1 GND2 NC 16 1n 1n 20k 47p NC GND2 OSCB2 RFIN1 +5V 1T379 100p GND1 RFIN2 OSCOUT2 GND1 —5— OSCOUT1 VC 47p Electrical Characteristics Measurement Circuit LOout CXA3068N 1n 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 Ω (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 Ω. —6— CXA3068N Current consumption vs. Supply voltage Conversion gain vs. Reception frequency (untuned input) 25 60 20 Conversion gain Current consumption [mA] fIF = 480MHz 55 50 15 10 45 4.7 5.0 5.3 0.8 1.0 Supply voltage [V] 1.2 1.4 1.6 1.8 2.0 2.2 Reception frequency [GHz] Noise figure vs. Reception frequency (untuned input, in DSB) Local oscillation output level vs. Local oscillation frequency 24 +5 Local oscillation output level [dBm] fIF = 480MHz Noise figure [dB] 20 16 12 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 0 –5 –10 1.4 Reception frequency [GHz] 1.6 1.8 2.0 2.2 2.4 Local oscillation frequency [GHz] —7— 2.6 2.8 CXA3068N RF pin oscillation frequency leak vs. Local oscillation frequency IF pin local oscillation leak vs. Local oscillation frequency RF pin oscillation frequency leak [dBm] –20 –30 –40 –50 –60 1.4 1.6 1.8 2.0 2.2 2.4 2.6 –30 –40 –50 –60 2.8 1.4 Local oscillation frequency [GHz] 1.6 1.8 2.0 2.2 2.4 2.6 2.8 Local oscillation frequency [GHz] Input/output characteristics (untuned input) = Fundamental-frequency (480MHz) +10 = Third-harmonics (470MHz) 0 –10 IF output level [dBm] IF pin local oscillation leak [dBm] –20 –20 –30 –50 –40 –60 –70 –50 –40 –30 –20 –10 RF input level [dBm] (935MHz, 940MHz) —8— 0 CXA3068N Input Impedance j50 2150MHz j25 j100 j150 j250 AA AA AA j10 0 50 –j250 –j10 –j150 5 1450MHz –j25 –j100 S11 –j50 950MHz —9— 6 7 8 CXA3068N Output Impedance (IF) 400MHz j50 j25 j100 480MHz j150 j250 j10 0 AA AA 50 –j250 –j10 –j150 1 –j25 2 3 –j100 S11 –j50 Output Impedance (local oscillation output) j50 j25 j100 2630MHz j150 j250 j10 0 AA AA 50 –j250 –j10 11 10 9 6 7 8 –j150 –j25 –j100 –j50 S11 1430MHZ —10— CXA3068N Package Outline Unit : mm 16PIN SSOP (PLASTIC) + 0.2 1.25 – 0.1 ∗5.0 ± 0.1 0.1 16 9 1 + 0.1 0.22 – 0.05 6.4 ± 0.2 ∗4.4 ± 0.1 A 8 + 0.05 0.15 – 0.02 0.65 ± 0.12 0.5 ± 0.2 0.1 ± 0.1 0° to 10° DETAIL A NOTE: Dimension “∗” does not include mold protrusion. PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE SSOP-16P-L01 LEAD TREATMENT SOLDER / PALLADIUM PLATING EIAJ CODE SSOP016-P-0044 LEAD MATERIAL COPPER / 42 ALLOY PACKAGE WEIGHT 0.1g JEDEC CODE —11—