cxa3038n Sony Electronics, cxa3038n Datasheet
cxa3038n
Related parts for cxa3038n
cxa3038n Summary of contents
Page 1
... IQ Detection IC for Digital Satellite Broadcast Tuner Description The CXA3038N for IQ-detection of DSS, DVB, and other digital satellite broadcast QPSK modulation signals in the 480 MHz band. It consists of an AGC amplifier circuit, oscillator circuit, phase shifter circuit, and phase comparison circuit. In addition, the chip has a PLL circuit for frequency control and built-in control data ...
Page 2
... Ref OSC Buffer Divider 1/80, 1/200 DC AMP DC AMP Charge Pump Phase Divider DET 10bit+4bit Compa- rator LPF QMIX Buffer LPF IMIX Buffer AGC AMP —2— CXA3038N Prescaler OSC 1/32 Phase Shifter ...
Page 3
... Switching pin for reference divider 10k frequency-division ratio. 90k This is set to 80 frequency 3 divisions when open or connected to V when connected to GND output output circuit GND. GND. RF circuit (AGCAmp, MIXER) GND. 11 20k AGCAmp gain adjustment. 8 20k 7 —3— CXA3038N Description . CC ; 200 frequency divisions CC ...
Page 4
... V circuit. This is set to open when activating the built-in PLL. 11 700 700 16 OSC pins These pins connect the varicap 3p diode and coil resonance circuit. 17 OSC circuit and phase shifter circuit GND. —4— CXA3038N Description . CC for 32 frequency division CC ...
Page 5
... Voltage output for varicap diode 18 making up the VCO 100 Phase comparison output. 19 This pin connects the loop filter. 20 PLL circuit GND. PLL circuit V 21 REFOSC output PLL lock/unlock monitor. 23 200k 20 21 60k 20p 20p 24 Crystal connection. 20 —5— CXA3038N Description . CC ...
Page 6
... RF=–50 dBm, Iout=10 MHz, 1Vp-p, 10 kHz offset RF=–50 dBm, Iout=10 MHz, 1Vp-p, 50 kHz S/I AGC=4 V, f=479.5 MHz AGC=4 V, f=479.5 MHz AGC=0 V, f=479.5 MHz AGC=4 V, f=479.5 MHz AGC=0 V, f=479.5 MHz f=479.5 MHz f=479.5 MHz, AGC=4 V (Full gain) —6— CXA3038N Min. Typ. Max. Unit 3.5 5 ...
Page 7
... V 1 0.279 V –f =f 0.199 V 2 –1 –f =f 0.120 V 2 –2 –f =f 0.042 V 2 –3 – –4 —7— CXA3038N Min. Typ. Max. Unit –50 µA 50 µA 0 2.8 3.2 4 0.01 0.2 V 4.000 MHz 230 280 400 mVp-p 14.9844 MHz 300 ...
Page 8
... CXA3038N ...
Page 9
... CXA3038N ...
Page 10
... The signal is converted to a base band signal by the I and Q mixer circuits, and the high-frequency component is removed by the low-pass filter. This signal is then amplified by the output amplifier circuit and output to Pin signal. In the same way, the I signal is output to Pin 4. • The output is low impedance. (See the Electrical Characteristics Measurement Circuit.) —10— CXA3038N ...
Page 11
... V or less ) CC Frequency dividing value VCO oscillation frequency [MHz] 9594 9593 9592 9591 9590 9589 9588 9587 9586 Frequency dividing value Reference frequency of the reference divider 80 200 —11— CXA3038N 479.70 479.65 479.60 479.55 479.50 479.45 479.40 479.35 479.30 50 kHz 50 kHz ...
Page 12
... In the loop filter example for the Electrical Characteristics Measurement Circuit, the lockup time is approximately 25 ms. 24 Capacitance of DC components eliminated Crystal oscillator 4MHz or 10MHz 200µA 22 Usage as PLL reference frequency for the tuner block 500 50µA 1k 20k DGND . CC —12— CXA3038N 10k 19 100 18 100 ...
Page 13
... These circuits use high-frequency processes, and the electrostatic strength is weak. Therefore, please be careful of surges and other excessive input. • The IQ error may vary depending on the connection locations of the GND pattern and V capacitors, oscillation amplitude of the oscillator circuit, and other factors —13— CXA3038N -GND bypass CC ...
Page 14
... IQ output frequency vs. Amplitude error RF input level=–40dBm, QOUT=1Vp-p 2 1.5 1 0.5 0 –0.5 –1 –1.5 – output frequency [MHz] Noise figure characteristics RF input level=–40dBm, QOUT=10MHz 5.8 0 0.5 1 1.5 2 AGC voltage [V] —14— CXA3038N –25 –20 –15 – 2.5 3 3.5 4 4.5 5 ...
Page 15
... Offset frequency [kHz] Third-order intermodulation distortion characteristics 20 10 Fundamental 0 –10 –20 –30 Third-order intermodulation distortion component –40 –50 –60 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 RF input level [dBm] 1000 —15— CXA3038N OSC=479.5MHz RF1=498.5MHz RF2=490.5MHz AGC=4V 0 ...
Page 16
... This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). 24PIN SSOP(PLASTIC) 7.8 ± 0 0.13 M 0.65 0.1 ± 0.1 0° to 10° DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT SSOP-24P-L01 LEAD MATERIAL SSOP024-P-0056 PACKAGE MASS —16— CXA3038N + 0.2 1.25 – 0.1 0 0.05 0.15 – 0.02 EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g ...