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? e97650a84-te sony reserves the right to change products and specifications without prior notice. this information does not convey any licens e by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustr ating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. absolute maximum ratings (ta=25 ?) supply voltage v cc ?.3 to 5.5 v storage temperature tstg ?5 to +150 ? operating conditions supply voltage v cc 4.75 to 5.30 v operating temperature topr ?5 to +75 ? description the CXA3038N is an ic 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. it realizes high- accuracy oscillator frequencies through use of a low- cost lc resonance circuit. features built-in pll for controlling oscillator frequency. oscillator frequency based at 479.5 mhz is adjustable in ? steps of 50 khz using the voltage of the control pin. reference osc allows switching to 4 mhz or 10 mhz. built-in output buffer for reference osc. low-impedance iq output. agc gain variation 35 db. applications digital satellite broadcast tuner structure bipolar silicon monolithic ic iq detection ic for digital satellite broadcast tuner 24 pin ssop (plastic) CXA3038N
2 CXA3038N block diagram and pin configuration r e f o s c b u f f e r c h a r g e p u m p o s c p r e s c a l e r 1 / 3 2 d i v i d e r 1 / 8 0 , 1 / 2 0 0 p h a s e d e t d i v i d e r 1 0 b i t + 4 b i t p h a s e s h i f t e r c o m p a - r a t o r b u f f e r l p f d c a m p b u f f e r l p f d c a m p a g c a m p 7 9 1 0 8 2 1 3 4 5 6 1 1 1 2 1 6 1 5 1 4 1 3 2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 x t a l l o c k r e f o u t d v c c d g n d l p f v c o s c g n d o s c 1 o s c 2 p s v c c l o o u t i q v c c q o u t x c o n t i o u t i q g n d g n d r f g n d a g c r f i n 2 r f i n 1 r f v c c n s e t i m i x q m i x
3 CXA3038N pin description pin symbol typical pin equivalent circuit description no. voltage 1 2 3 4 5 6 7 8 iqv cc qout xcont iout iqgnd gnd rfgnd agc 5 v 2.7 v open or 5 v when using 4 mhz crystal ; 0 v when using 10 mhz crystal. 2.7 v 0 v 0 v 0 v 0 to 4 v 1 2 5 2 0 9 0 k 2 1 3 2 0 1 0 k 1 4 5 2 0 2 0 k 2 0 k 1 1 8 7 iq output circuit v cc . q output. switching pin for reference divider frequency-division ratio. this is set to 80 frequency divisions when open or connected to v cc ; 200 frequency divisions when connected to gnd. i output. iq output circuit gnd. gnd. rf circuit (agcamp, mixer) gnd. agcamp gain adjustment.
4 CXA3038N pin symbol typical pin equivalent circuit description no. voltage 9 10 11 12 13 14 15 16 17 rfin2 rfin1 rfv cc nset loout psv cc osc2 osc1 oscgnd 2.1 v 2.1 v 5 v 1.6 v 4 v 5 v 3.7 v 3.7 v 0 v 5 k 9 1 0 7 2 . 2 v 5 k 2 1 1 2 2 0 1 4 1 3 2 0 8 k 1 1 1 7 1 6 1 5 7 0 0 7 0 0 3 p 3 p rf signal inputs. rf circuit (agcamp, mixer, osc) v cc . osc frequency fine-adjustment. the oscillator frequency based at 479.5 mhz is adjustable in 4 steps of 50 khz by applying a voltage of 0 to 5 v. output for osc frequency signal divided into 32 frequency divisions. v cc for 32 frequency division circuit. this is set to open when activating the built-in pll. osc pins. these pins connect the varicap diode and coil resonance circuit. osc circuit and phase shifter circuit gnd.
5 CXA3038N pin symbol typical pin equivalent circuit description no. voltage 18 19 20 21 22 23 24 vc lpf dgnd dv cc refout lock xtal 0.3 v to 5 v 1.8 v to 3.7 v 0 v 5 v 4.1 v 0.01 v when unlocked; 3.2 v when locked 4.4 v 1 0 0 2 1 1 8 2 0 1 0 k 1 0 0 2 1 1 9 2 0 2 1 2 2 2 0 2 1 2 3 2 0 2 0 0 k 2 1 2 0 2 4 6 0 k 2 0 p 2 0 p voltage output for varicap diode making up the vco. phase comparison output. this pin connects the loop filter. pll circuit gnd. pll circuit v cc . refosc output. pll lock/unlock monitor. crystal connection.
6 CXA3038N electrical characteristics circuit current (ta=25 c, v cc =5 v, see the electrical characteristics measurement circuit.) item symbol measurement conditions min. typ. max. unit circuit current a circuit current d circuit current l i cca i ccd i ccps analog circuit current at no signal. total current of iqv cc and rfv cc . pll circuit current. dv cc current. 32-frequency division circuit current at no signal. psv cc current. 41 60 80 ma 2 3.5 5.5 ma 1.1 1.6 2.4 ma ac characteristics (ta=25 c, v cc =5 v, see the electrical characteristics measurement circuit.) item symbol measurement conditions min. typ. max. unit input sensitivity gain control range conversion gain iq phase error iq amplitude error phase frequency error amplitude frequency error cut-off frequency maximum q output maximum i output noise figure third-order intermodulation distortion local oscillation phase noise pll reference leak rf pin local oscillation leak qout pin local oscillation leak iout pin local oscillation leak refout pin local oscillation leak rf input admittance v in g agc cg bp bv ? fbp ? fbv f c v qmax v imax nf im3 cn ref lk rf lk q lk1 q lk2 i lk1 i lk2 reflk r c iout=10 mhz, 1 vp-p iout=10 mhz, 1 vp-p, agc=4 v-0 v rf=?0 dbm, iout=10 mhz, agc=4 v (full gain) rf=?0 dbm, iout=10 mhz, 1 vp-p rf=?0 dbm, iout=10 mhz, 1 vp-p rf=?0 dbm, iout=0 mhz?5 mhz, 1 vp-p rf=?0 dbm, iout=0 mhz?5 mhz, 1 vp-p rf=?0 dbm, iout=from 1 vp-p to 3 db down rf=?0 dbm, qout=10 mhz, agc=4 v (full gain) rf=?0 dbm, iout=10 mhz, agc=4 v (full gain) iout=10 mhz, agc=4 v (full gain), dsb rf1=489.5 mhz, rf2=490.5 mhz, iout=1 vp-p rf=?0 dbm, iout=10 mhz, 1vp-p, 10 khz offset rf=?0 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) ?0 dbm 32.5 35 db 52 54 57 db 4 deg 0.5 db 0.5 deg 0.1 db 25 mhz 2.5 3 3.5 vp-p 2.5 3 3.5 vp-p 9 db 32 db ?8 dbc/hz ?1 db ?1 dbm ?4 dbm ?0 ?4 dbm ?0 ?4 dbm 1.25 k 1.4 pf measured value for untuned inputs. noise figure is the direct reading value from the nf meter.
7 CXA3038N pll block (ta=25 c, v cc =5 v, see the electrical characteristics measurement circuit.) item symbol measurement conditions min. typ. max. unit lpf (charge pump) h output current l output current vc output voltage range lock h output voltage l output voltage refout output frequency output amplitude loout (32 frequency divisions) output frequency output amplitude osc control 479.7 mhz control voltage 479.65 mhz control voltage 479.6 mhz control voltage 479.55 mhz control voltage 479.5 mhz control voltage 479.45 mhz control voltage 479.4 mhz control voltage 479.35 mhz control voltage 479.3 mhz control voltage i lpfh i lpfl v vch v lh v ll f ref v ref f lo v lo f+4 f+3 f+2 f+1 f0 f? f? f? f? xcont=open, pll lock xtal=4 mhz, xcont=open, pll lock xtal=4 mhz, xcont=gnd, pll unlock xtal=4 mhz xtal=4 mhz osc=479.5 mhz during pll lock osc=479.5 mhz during pll lock nset=0 v, f 0 v ? 0 =f ? 4 nset=0.4 v, f 0.4 v ? 0 =f ? 3 nset=0.8 v, f 0.8 v ? 0 =f ? 2 nset=1.2 v, f 1.2 v ? 0 =f ? 1 nset=1.6 v nset=2.0 v, f 2.0 v ? 0 =f ? ? nset=2.4 v, f 2.4 v ? 0 =f ? ? nset=2.6 v, f 2.6 v ? 0 =f ? ? nset=3.2 v, f 3.2 v ? 0 =f ? ? ?0 a 50 a 0.3 v cc v 2.8 3.2 4.2 v 0 0.01 0.2 v 4.000 mhz 230 280 400 mvp-p 14.9844 mhz 300 380 500 mvp-p 0.597 v cc v cc v 0.517 v cc 0.590 v cc v 0.438 v cc 0.515 v cc v 0.358 v cc 0.436 v cc v 0.279 v cc 0.356 v cc v 0.199 v cc 0.277 v cc v 0.120 v cc 0.197 v cc v 0.042 v cc 0.118 v cc v 0 0.04 v cc v
8 CXA3038N electrical characteristics measurement circuit x t a l l o c k r e f o u t d v c c d g n d l p f v c o s c g n d o s c 1 o s c 2 p s v c c l o o u t i q v c c q o u t x c o n t i o u t i q g n d g n d r f g n d a g c r f i n 2 r f i n 1 r f v c c n s e t 1 0 n 4 m h z 2 p r e f o u t 1 0 n 1 n 6 8 0 n 1 3 k 1 5 0 n 5 1 k 5 p 1 n l 8 0 n h 1 t 3 6 2 1 n 5 1 k d v c c ( + 5 v ) p s v c c ( + 5 v ) v c 1 n 1 0 n l o o u t x t a l 2 3 2 2 2 1 1 9 1 8 1 7 1 6 1 5 1 4 1 3 2 4 2 0 c x a 3 0 3 8 n q o u t i o u t 1 n 1 n 1 n 1 n 1 0 0 k 1 n 1 n l o c k a g c 7 9 1 0 8 2 1 3 4 5 6 1 1 1 2 x t a l 4 m h z 1 0 m h z x c o n t 5 v / o p e n g n d v c c ( + 5 v ) 1 n 1 0 r f i n 0 . 5 3 . 0 2 . 5 l : i n d u c t a n c e c o n s t a n t w i r e d i a m e t e r w i n d i n g d i a m e t e r n u m b e r o f t u r n s
9 CXA3038N application circuit x t a l l o c k r e f o u t d v c c d g n d l p f v c o s c g n d o s c 1 o s c 2 p s v c c l o o u t i q v c c q o u t x c o n t i o u t i q g n d g n d r f g n d a g c r f i n 2 r f i n 1 r f v c c n s e t 1 0 n 4 m h z 2 p r e f o u t 1 0 n 1 n 6 8 0 n 1 3 k 1 5 0 n 5 1 k 5 p 1 n l 8 0 n h 1 t 3 6 2 1 n 5 1 k x t a l c x a 3 0 3 8 n q o u t i o u t v c c ( + 5 v ) 1 n 1 0 r f i n l ; 0 . 5 / 3 . 0 / 2 . 5 t r e f e r e n c e c l o c k f o r t u n e r s t a g e p l l . 2 3 2 2 2 1 1 9 1 8 1 7 1 6 1 5 1 4 1 3 2 4 2 0 1 n a g c 1 n 1 n 1 n 6 8 k 3 3 k 1 n 4 7 9 . 5 m h z f r o m t u n e r s t a g e 7 9 1 0 8 2 1 3 4 5 6 1 1 1 2 application circuits shown are typical examples illustrating the operation of the devices. sony cannot assume responsibility fo r any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same .
10 CXA3038N description of operation (see the electrical characteristics measurement circuit.) oscillator circuit this is a differential amplification-type oscillator circuit, and it is oscillated by connecting an lc parallel resonance circuit via a coupling capacitance between pin 15 and pin 16. a varicap diode is used as a capacitor for the lc parallel resonance circuit to configure the vco. set the l value so that the osc oscillation frequency is approximately 480 mhz when a voltage of 2.5 v is applied to the varicap diode. the oscillator signal is injected into the phase shifter circuit. phase shifter circuit this is a phase shifter having cr configuration. this circuit produces two local signals having a 90 phase difference at 479.5 mhz and injects these signals to the iq mixer circuit. agc amplifier circuit an if signal (480 mhz band) from the tuner stage is input to pins 9 and 10. this if signal which is input to pins 9 and 10 is amplified by the agc amplifier and injected into the iq mixer circuit. the gain can be adjusted by applying the agc voltage to pin 8. the applied agc voltage ranges from 0 to 4 v, with the minimum gain at 0 v and the maximum gain at 4 v. iq mixer circuit this is a double-balance mixer-type circuit consisting of two mixer circuits. the if signal amplified by the agc amplifier is converted into a base band signal by the local signal. low-pass filter circuit this is a low-pass filter with a cr configuration. the cut-off frequency is set at 25 mhz (? db point). output amplifier circuit 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 2 as a q signal. in the same way, the i signal is output to pin 4. the output is low impedance.
11 CXA3038N pll circuit (when pin 21 is connected to v cc ) a pll is formed by connecting the anode of the lc parallel resonance circuit varicap diode to the pin 18 output via a high resistance of approximately 10 k and connecting a loop filter between pin 18 and pin 19. the pll circuit consists of a main divider, reference divider, phase comparator, charge pump, and reference oscillator. the frequency dividing data is included in the main divider, making external data settings unnecessary. the reference frequency has been designed at 50 khz. fine adjustment of the vco frequency can be performed by changing the frequency dividing value of the main divider through an applied voltage to pin 12. this allows adjustment in 4 steps at 50 khz intervals based at 479.5 mhz as shown in the table below. the reference divider has two types of frequency dividing data, 80 and 200. either 4 mhz or 10 mhz can be selected for the crystal oscillator. when using the 4 mhz crystal oscillator, opening pin 3 will select a frequency dividing value of 80 for the reference divider, and the reference frequency will become 50 khz. in the same way, when using the 10 mhz crystal oscillator, connecting pin 3 to gnd will select a frequency dividing value of 200 for the reference divider, and the reference frequency will become 50 khz. this is summarized in the table below. pin 12 voltage [v] 0.597 v cc or more 0.517v cc to 0.595v cc 0.438v cc to 0.515v cc 0.358v cc to 0.436v cc 0.279v cc to 0.356v cc 0.199v cc to 0.277v cc 0.120v cc to 0.197v cc 0.042v cc to 0.118v cc 0 to 0.04v cc frequency dividing value 9594 9593 9592 9591 9590 9589 9588 9587 9586 vco oscillation frequency [mhz] 479.70 479.65 479.60 479.55 479.50 479.45 479.40 479.35 479.30 crystal oscillator 4 mhz 10 mhz pin 3 voltage open 0.8 v or less frequency dividing value of the reference divider 80 200 reference frequency 50 khz 50 khz
12 CXA3038N reference oscillator circuit this is oscillated by connecting a crystal oscillator (4 mhz or 10 mhz) between pin 24 and gnd. the input capacitance of pin 24 is approximately 14 pf. therefore, a crystal with a load capacitance of 12 pf is recommended. when connecting a crystal with a large load capacitance of 16 pf or so, connect a low capacitance between pin 24 and gnd as shown in the figure below, and adjust the frequency. the reference oscillator signal is sent to the reference buffer circuit and output from pin 22 by the emitter follower. the reference oscillator signal becomes the pll comparison frequency in the ic. the output amplitude is approximately 300 mvp-p. charge pump circuit the output current of the charge pump has been designed at 50 a. the pin 18 output voltage ranges from approximately 0.3 v to v cc . in the loop filter example for the electrical characteristics measurement circuit, the lockup time is approximately 25 ms. 2 4 c r y s t a l o s c i l l a t o r 4 m h z o r 1 0 m h z c a p a c i t a n c e o f d c c o m p o n e n t s e l i m i n a t e d r e f e r e n c e f r e q u e n c y f i n e - a d j u s t m e n t c a p a c i t a n c e 2 4 2 2 2 0 0 a u s a g e a s p l l r e f e r e n c e f r e q u e n c y f o r t h e t u n e r b l o c k 1 k 1 k 1 k 2 0 k 5 0 0 1 9 1 0 0 1 8 1 0 0 5 0 a d v c c d g n d 1 0 k f r o m p h a s e d i v i d e r f r o m m a i n d i v i d e r
13 CXA3038N 32 frequency division circuit (when pin 14 is connected to v cc ) an oscillation signal is sent from the oscillator circuit to the 32 frequency division circuit via a coupling capacitance. the 32 frequency division signal is output from pin 13 by the counter. the output is approximately 400 mvp-p ecl output. notes on operation 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 cc -gnd bypass capacitors, oscillation amplitude of the oscillator circuit, and other factors.
14 CXA3038N n f [ d b ] r f i n p u t l e v e l v s . p h a s e d i f f e r e n c e i q o u t p u t f r e q u e n c y = 1 m h z , q o u t = 1 v p - p p h a s e d i f f e r e n c e [ d e g ] r f i n p u t l e v e l [ d b m ] r f i n p u t l e v e l v s . a m p l i t u d e e r r o r i q o u t p u t f r e q u e n c y = 1 m h z , q o u t = 1 v p - p a m p l i t u d e e r r o r [ d b ] r f i n p u t l e v e l [ d b m ] i q o u t p u t f r e q u e n c y v s . p h a s e d i f f e r e n c e r f i n p u t l e v e l = 4 0 d b m , q o u t = 1 v p - p p h a s e d i f f e r e n c e [ d e g ] i q o u t p u t f r e q u e n c y [ m h z ] i q o u t p u t f r e q u e n c y v s . a m p l i t u d e e r r o r r f i n p u t l e v e l = 4 0 d b m , q o u t = 1 v p - p a m p l i t u d e e r r o r [ d b ] i q o u t p u t f r e q u e n c y [ m h z ] s u p p l y v o l t a g e v s . c u r r e n t c o n s u m p t i o n d u r i n g p l l o p e r a t i o n c u r r e n t c o n s u m p t i o n [ m a ] s u p p l y v o l t a g e [ v ] n o i s e f i g u r e c h a r a c t e r i s t i c s r f i n p u t l e v e l = 4 0 d b m , q o u t = 1 0 m h z a g c v o l t a g e [ v ] 9 5 9 4 9 3 9 2 9 1 9 0 8 9 8 8 8 7 8 6 8 5 6 0 5 5 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 2 1 . 5 1 0 . 5 0 0 . 5 1 1 . 5 2 6 0 5 5 5 0 4 5 4 0 3 5 3 0 2 0 1 5 1 0 9 5 9 4 9 3 9 2 9 1 9 0 8 9 8 8 8 7 8 6 8 5 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 1 . 5 1 0 . 5 0 0 . 5 1 1 . 5 2 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 9 0 8 0 7 0 6 0 5 0 3 0 4 0 4 . 2 4 . 4 4 . 6 4 . 8 5 5 . 2 5 . 4 5 . 6 5 . 8 3 5 3 0 2 5 2 0 1 5 1 0 5 0 0 0 . 5 1 1 . 5 2 2 . 5 3 3 . 5 4 4 . 5 5 2 5
15 CXA3038N 6 0 5 5 5 0 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 1 2 3 4 2 0 0 6 0 1 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 2 0 c / n [ d b c / h z ] 0 . 1 1 1 0 1 0 0 1 0 0 0 5 4 5 5 0 4 0 3 0 2 0 1 0 1 0 a a a a a a a a a a a a o s c = 4 7 9 . 5 m h z r f 1 = 4 9 8 . 5 m h z r f 2 = 4 9 0 . 5 m h z a g c = 4 v 1 1 0 a g c v o l t a g e v s . g a i n r f i n p u t l e v e l = 4 0 d b m , i q o u t p u t f r e q u e n c y = 1 m h z g a i n [ d b ] a g c v o l t a g e [ v ] t h i r d - o r d e r i n t e r m o d u l a t i o n d i s t o r t i o n c h a r a c t e r i s t i c s q o u t o u t p u t l e v e l [ d b m ] r f i n p u t l e v e l [ d b m ] f u n d a m e n t a l t h i r d - o r d e r i n t e r m o d u l a t i o n d i s t o r t i o n c o m p o n e n t p h a s e n o i s e c h a r a c t e r i s t i c s r f i n p u t l e v e l = 4 0 d b m , q o u t = 1 m h z , 1 v p - p o f f s e t f r e q u e n c y [ k h z ]
s o n y c o d e e i a j c o d e j e d e c c o d e s s o p - 2 4 p - l 0 1 s s o p 0 2 4 - p - 0 0 5 6 p a c k a g e m a t e r i a l l e a d t r e a t m e n t l e a d m a t e r i a l p a c k a g e m a s s e p o x y r e s i n s o l d e r / p a l l a d i u m 4 2 / c o p p e r a l l o y p a c k a g e s t r u c t u r e p l a t i n g 0 . 1 g 2 4 p i n s s o p ( p l a s t i c ) * 5 . 6 0 . 1 2 4 * 7 . 8 0 . 1 1 3 0 . 6 5 1 2 1 0 . 2 2 0 . 0 5 + 0 . 1 0 . 1 5 0 . 0 2 + 0 . 0 5 7 . 6 0 . 2 0 . 1 1 . 2 5 0 . 1 + 0 . 2 a 0 . 1 0 . 1 0 t o 1 0 0 . 5 0 . 2 d e t a i l a n o t e : d i m e n s i o n s * d o e s n o t i n c l u d e m o l d p r o t r u s i o n . 0 . 1 3 m package outline unit : mm CXA3038N 16 n o t e : p a l l a d i u m p l a t i n g t h i s p r o d u c t u s e s s - p d p p f ( s o n y s p e c . - p a l l a d i u m p r e - p l a t e d l e a d f r a m e ) .

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