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features ? rf/lo frequency range: 30-250 mhz ? on chip vco ? low distortion agc amplifier: -9 dbm iip 3 @ min gain ? on chip video amp: 3.0 vp-p (v cc = 5 v) ? small 20 pin ssop package ? available on tape and reel 250 mhz qam if downconverter upc2798gr description nec's upc2798gr is a silicon mmic downconverter manu- factured with the nesat?iii silicon bipolar process. this product consists of an input agc amplifier, mixer, local oscil- lator, and video amplifier. it is housed in a small 20 pin ssop package. the device is designed for use as an if downconverter for digital catv settops and cable modems utilizing qam modulation. nec's stringent quality assurance and test procedures ensure the highest reliability and performance. california eastern laboratories part number upc2798gr package outline s20 symbols parameters and conditions units min typ max total block (v cc1 = 5 v, v cc2 = 5 v, r l = 1 k ? ) i cc circuit current (no input signal) ma 24.0 35.5 45.0 cg max1 maximum conversion gain, v agc = 4.0 v, pins g1a - g1b shorted db 68.0 74.0 76.0 cg max2 maximum conversion gain, v agc = 4.0 v, pins g1a - g1b open db 58.0 cg min1 minimum conversion gain, v agc = 1.0 v, pins g1a - g1b shorted db 32.0 39.0 43.0 cg min2 minimum conversion gain, v agc = 1.0 v, pins g1a - g1b open db 22.0 iip 3 input intercept point, v agc = 1.0 v, pins g1a - g1b shorted dbm -14.0 iip 3 input intercept point, v agc = 1.0 v, pins g1a - g1b open dbm -8.0 total block (v cc1 = 5 v, v cc2 = 9 v, r l = 1 k ? ) i cc circuit current (no input signal) ma 32.0 47.0 60.0 cg max1 maximum conversion gain, v agc = 4.0 v, pins g1a - g1b shorted db 72.0 78.5 81.0 cg max2 maximum conversion gain, v agc = 4.0 v, pins g1a - g1b open db 59.0 cg min1 minimum conversion gain, v agc = 1.0 v, pins g1a - g1b shorted db 43.5 cg min2 minimum conversion gain, v agc = 1.0 v, pins g1a - g1b open db 22.5 iip 3 input intercept point, v agc = 1.0 v, pins g1a - g1b open dbm -7.5 i cc circuit current (no input signal) ma 15.0 23.0 28.0 f rf rf input frequency range mhz 30 250 f osc osc frequency range mhz 30 250 f if if output frequency range mhz dc 150 cg max maximum conversion gain, v agc = 4.0 v db 25 cg min minimum conversion gain, v agc = 1.0 v db -7 gcr agc dynamic range, v agc = 1.0 to 4.0 v db 26 32 nf noise figure, ssb, v agc = 4.0 v (max gain) db 9 v agc (h) agc voltage high, at max gain v 4.0 v agc (l) agc voltage low, at min gain v 1.0 agc iip 3 agc input intercept point, at min gain dbm -9 electrical characteristics (t a = 25 c, rf = 45 mhz, l o = 55 mhz, p lo = -10 dbm, unless otherwise specified) agc amplifier and mixer block (v cc1 = 5 v)
symbol parameter units min typ max v cc1 supply voltage 1 v 4.5 5.0 5.5 v cc2 supply voltage 2 v 4.5 5.0 10.0 t a1 operating temp. range 1 * c -40 +25 +85 t a2 operating temp. range 2 ** c -40 +25 +75 symbols parameters units ratings v cc1 supply voltage 1 (mixer block) v 6.0 v cc2 supply voltage 2 (video amp block) v 6.0 p d power dissipation, t a = 85 ? c 2 mw 430 t op operating temperature c -40 to +85 t stg storage temperature c -55 to +150 absolute maximum ratings 1 (t a = 25 c) recommended operating conditions notes: * @ v cc1 = v cc2 = 4.5 to 5.5 v ** @ v cc1 = 4.5 to 5.5 v, v cc2 = 4.5 to 10.0 v notes: 1. operation in excess of any one of these parameters may result in permanent damage. 2. mounted on a 50 x 50 x 1.6 mm epoxy glass pwb. symbols parameters units ratings v cc1 supply voltage 1 (mixer block) v 6.0 v cc2 supply voltage 2 (video amp block) v 11.0 p d power dissipation, t a = 75 ? c 2 mw 500 t op operating temperature c -40 to +75 t stg storage temperature c -55 to +150 part number upc2798gr package outline s20 symbols parameters and conditions units min typ max video amp block (v cc2 = 5 v, differential, r l = 1 k ? ) i cc circuit current (no input signal) ma 9.0 12.5 17.0 v out output voltage vp-p 3.0 g1 differential gain 1, pins g1a and g1b shorted, v out = 3.0 vp-p v/v 200 g2 differential gain 2, pins g1a and g1b open, v out = 3.0 vp-p v/v 26 video amp block (v cc2 = 9 v, differential, r l = 1 k ? ) i cc circuit current (no input signal) ma 17.0 24.0 32.0 v out output voltage vp-p 3.0 g1 differential gain 1, pins g1a and g1b shorted v/v 385 g2 differential gain 2, pins g1a and g1b open v/v 28.5 video amp block (v cc2 = 5 v, single ended, r l = 50 ? ) a vs1 single-ended gain, pins g1a - g1b shorted db 40.0 a vs2 single-ended gain, pins g1a - g1b open db 22.5 iip 3 input intercept point, pins g1a - g1b open, f1 = 9 mhz, f2 = 11 mhz dbm -11.5 video amp block (v cc2 = 9 v, single ended, r l = 50 ? ) a vs1 single-ended gain, pins g1a - g1b shorted db 45.0 a vs2 single-ended gain, pins g1a - g1b open db 23.5 iip 3 input intercept point, pins g1a - g1b open, f1 = 9 mhz, f2 = 11 mhz dbm -5.0 video amp block (v cc2 = 5 or 9 v, common, r l = 1 k ? ) bw g1 bandwidth 1, g1 mhz 50 bw g2 bandwidth 2, g2 mhz 50 r in 1 input resistance 1, g1 k ? 3.5 r in 2 input resistance 2, g2 k ? 9.7 c in input capacitance, c in pf 1.6 cmrr common mode rejection ratio, v cm = 1.0 v p-p , ? = 100 khz db 80 psrr power supply rejection ratio db 70 r rise time ns 2.6 d propagation delay time ns 4.4 upc2798gr electrical characteristics (t a = 25 c, rf = 45 mhz, l o = 55 mhz, p lo = -10 dbm, unless otherwise specified)
upc2798gr typical characteristics (by measurement circuit 1: agc amp and mixer block) circuit current vs. supply voltage conversion gain vs. input frequency conversion gain vs. if frequency noise figure vs. agc voltage conversion gain vs. agc voltage third order intermodulation level and output power vs. input power supply voltage, v cc (v) input frequency, f rf (mhz) if frequency, f if (mhz) agc voltage, v agc (v) agc voltage, v agc (v) input power, p in (dbm) circuit current, i cc (ma) conversion gain, cg (db) conversion gain, cg (db) noise figure, nf (db) conversion gain, cg (db) output power, p out (dbm) 50 2 4 68 10 12 10 20 30 40 0 0 video amp mixer +agc+vco no input signal t a = 25?c v agc = 0 v total p rf = 60 dbm f osc = f rf +5 mh z, p osc = -10 dbm v cc = 5 v, t a = 25?c 20 10 0 30 -10 -20 0 200 250 300 -30 150 50 100 v agc = 4.0 v v agc = 2.6 v v agc = 0.0 v 20 10 0 -10 -20 -30 0 30 60 90 120 150 180 30 f rf = 45 mh z , p rf = -60 dbm f osc = 50~200 mh z , p osc = -10 dbm v cc = 5 v, t a = 25?c v agc = 4.0 v v agc = 2.6 v v agc = 0.0 v 20 10 0 0 1 23 4 5 30 v cc = 5 v f rf = 100 mh z f osc = 120 mh z p osc = -10 dbm t a = 25?c dsb 0 30 20 10 0 -10 1 2 3 4 5 v cc = 5 v f rf = 45 mh z p rf = -60 dbm f osc = 50 mh z p osc = -10 dbm t a = 25?c -20 -30 -40 -50 -60 -70 -80 -90 -60 -50 -40 -30 -20 -10 0 -10 v cc = 5 v v agc = 0 v f rf1 = 44 mh z f rf2 = 46 mh z f osc = 55 mh z p osc = -10 dbm t a = 25?c p out im 3
standard characteristics (by measurement circuit 2: video amp, r l = 1 k ? , t a = 25 ? c) differential gain vs. input frequency differential gain vs. input frequency output power vs. input power (video amp) output power vs. input power (video amp) differential gain vs. resistance input frequency, f in (mhz) input frequency, f in (mhz) input power, p in (dbm) input power, p in (dbm) resistance ( ? ) differential gain (v/v) differential gain (v/v) output power, pout (dbm) output power, pout (dbm) differential gain (v/v) upc2798gr 100 0 100 200 300 400 0 20 40 60 80 g1a-g1b : short p out = 1.5 v p-p const. v cc = 9 v v cc = 5 v 10 0 0 40 30 20 20 40 60 80 100 g1a-g1b : open p out = 1.5 v p-p const. v cc = 9 v v cc = 5 v 0 -10 -20 0 -10 -20 -30 -40 -30 fin = 10 mh z g1a-g1b : short v cc = 9 v v cc = 5 v -50 0 -10 -20 -30 -40 -40 -30 -20 -10 0 10 fin = 10 mh z g1a-g1b : open v cc = 9 v v cc = 5 v 500 400 300 200 100 100 246 2000 56 0 30 43 open short fin = 10 mh z v cc = 9 v v cc = 5 v
upc2798gr 0 10 20 30 40 50 0.1 1 10 100 v cc2 = 5 v g1a-g1b: short 0 10 20 30 40 50 0.1 1 10 100 v cc2 = 5 v g1a-g1b: open 20 0 -20 -40 -60 -80 -50 -40 -30 -20 -10 p out im 3 v cc2 = 5 v f 1 = 9 mhz f 2 = 11 mhz g1a?1b: open 20 0 -20 -40 -60 -80 -50 -40 -30 -20 -10 p out im 3 v cc2 = 9 v f 1 = 9 mhz f 2 = 11 mhz g1a?1b: open 0 10 20 30 40 50 0.1 1 10 100 v cc2 = 9 v g1a-g1b: short 0 10 20 30 40 50 0.1 1 10 100 v cc2 = 9 v g1a-g1b: open gain vs. input frequency gain vs. input frequency standard characteristics (by measurement circuit 3: video amp, r l = 50 ? , t a = 25 ? c) gain vs. input frequency gain vs. input frequency third order intermodulation level and output power vs. input power third order intermodulation level and output power vs. input power single-ended gain, a vs (db) single-ended gain, a vs (db) single-ended gain, a vs (db) single-ended gain, a vs (db) input frequency, f in (mhz) input frequency, f in (mhz) input frequency, f in (mhz) input frequency, f in (mhz) input power, p in (dbm) output power, p out (dbm) output power, p out (dbm) input power, p in (dbm)
upc2798gr typical characteristics (by measurement circuit 4: total block, f rf = 45 mhz, p rf = -60 dbm, posc = -10 dbm) conversion gain vs. if frequency conversion gain, cg (db) if frequency, f if (mhz) conversion gain vs. if frequency conversion gain vs. if frequency conversion gain vs. if frequency if frequency, f if (mhz) if frequency, f if (mhz) if frequency, f if (mhz) conversion gain, cg (db) conversion gain, cg (db) conversion gain, cg (db) 80 60 40 20 0 0 40 80 120 160 v cc1 = 5 v, v cc2 = 5 v g1a - g1b : short 1 k ? load, t a = 25?c v agc = 4 v v agc = 3 v v agc = 1 v 80 60 40 20 0 0 40 80 120 160 v cc1 = 5 v, v cc2 = 9 v g1a - g1b : short 1 k ? load, t a = 25?c v agc = 4 v v agc = 3 v v agc = 1 v 80 60 40 20 0 0 40 80 120 160 v cc1 = 5 v, v cc2 = 5 v g1a - g1b : open 1 k ? load, t a = 25?c v agc = 3 v v agc = 4 v 80 60 40 20 0 0 40 80 120 160 v cc1 = 5 v, v cc2 = 9 v g1a - g1b : open 1 k ? load, t a = 25?c v agc = 4 v v agc = 3 v
upc2798gr typical characteristics (by measurement circuit 4: total block, p rf = -60 dbm, f osc = f rf + 10 mhz, p osc = -10 dbm) conversion gain vs. input frequency conversion gain, cg (db) input frequency, f rf (mhz) conversion gain vs. input frequency conversion gain vs. input frequency conversion gain vs. input frequency input frequency, f rf (mhz) input frequency, f rf (mhz) input frequency, f rf (mhz) conversion gain, cg (db) conversion gain, cg (db) conversion gain, cg (db) 0 80 60 40 20 0 50 100 150 200 250 v cc1 = 5 v v cc2 = 5 v 1 k ? load g1a-g1b : short t a = 25?c v agc = 4 v v agc = 3 v v agc = 1 v 0 80 60 40 20 0 50 100 150 200 250 v cc1 = 5 v v cc2 = 9 v 1 k ? load g1a-g1b : short t a = 25?c v agc = 4 v v agc = 3 v v agc = 1 v 0 80 60 40 20 0 50 100 150 200 250 v cc1 = 5 v, v cc2 = 5 v g1a-g1b : open 1 k ? load, t a = 25?c v agc = 4 v v agc = 3 v v agc = 1 v 0 80 60 40 20 0 50 100 150 200 250 v cc1 = 5 v, v cc2 = 9 v g1a-g1b : open 1 k ? load, t a = 25?c v agc = 4 v v agc = 3 v v agc = 1 v
upc2798gr v cc1 = 5 v v cc2 = 5 v f 1 = 44 mhz f 2 = 46 mhz f osc = 55 mhz p osc = -10 dbm g1a?g1b: short p out im 3 0 -20 -40 -60 -80 -50 -40 -30 -20 -10 0 v cc1 = 5 v v cc2 = 9 v f 1 = 44 mhz f 2 = 46 mhz f osc = 55 mhz p osc = -10 dbm g1a?1b: open im 3 p out 0 -20 -40 -60 -80 -50 -40 -30 -20 -10 0 0 -20 -40 -60 -80 -50 -40 -30 -20 -10 0 v cc1 = 5 v v cc2 = 5 v f 1 = 44 mhz f 2 = 46 mhz f osc = 55 mhz p osc = -10 dbm g1a?1b: short p out im 3 third order intermodulation level and output power vs. input power third order intermodulation level and output power vs. input power third order intermodulation level and output power vs. input power input power, p in (dbm) input power, p in (dbm) input power, p in (dbm) output power, p out (dbm) output power, p out (dbm) output power, p out (dbm) standard characteristics (by measurement circuit 4: total block)
standard characteristics (by application circuit example : mixer block) upc2798gr conversion gain vs. input frequency noise figure vs. agc voltage conversion gain vs. agc voltage third order intermodulation level and output power vs. input power oscillator frequency vs. tuning voltage input frequency, f rf (mhz) agc voltage, v agc (v) agc voltage, v agc (v) input power, p in (dbm) tuning voltage, v tu (v) conversion gain, cg (db) noise figure, nf (db) conversion gain, cg (db) output power, p out (dbm) oscillator frequency, f osc (mhz) 30 25 20 30 40 50 60 f rf = 50 mhz f if = 10 mhz p rf = -50 dbm v agc = 4 v v cc = 5.5 v v cc = 5.0 v v cc = 4.5 v 30 20 10 0 012345 f rf = 50 mh z f if = 10 mh z v cc = 4.5 v v cc = 5.0 v v cc = 5.5 v dsb -10 0 20 10 30 12 3 45 0 f rf = 50 mh z f if = 10 mh z p rf = -50 dbm v cc = 4.5 v v cc = 5.0 v v cc = 5.5 v -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -60 -50 -40 -30 -20 -10 0 10 v cc = 5 v f rf1 = 45 mh z f rf2 = 46 mh z f osc = 55 mh z v agc = 0 v p out im 3 20 70 60 50 40 30 0 5 10 15 v cc = 5 v
upc2798gr pin pin pin voltage function and explanation equivalent circuit no. name typ. (v) 1 agc in1 1.5 rf input pins. pins 1 and 2 are each base inputs to a differential amplifier. in the case of a single-ended input, bypass the unused pin to ground through a capacitor. 2 agc in2 1.5 3v agc 0~5 gain control pin of the mixer input amplifier. v agc up = gain up. it is recommended to use a 100k ? voltage divider at this pin. 4v cc 1 5.0 supply voltage pin for the downconverter block. this pin should be connected with a bypass capacitor (e.g., 1000 pf) to minimize ground impedance. 5 osc out 4.0 output pin for the internal oscillator. this pin may be connected to the input of a pll synthesizer. 6 gnd 0.0 ground pin. this pin must be connected to system ground. form ground pattern as wide as possible to minimize ground impedance. 7 osc b2 2.4 input pins for the internal oscillator. the internal oscillator consists of a balanced amplifier. 8 osc c1 4.6 9 osc c2 4.6 10 osc b1 2.4 pin functions 1 2 4 reg agc control agc control 4 3 reg 4 5 9 10 7 84 reg reg
upc2798gr pin pin pin voltage function and explanation equivalent circuit no. name typ. (v) ( ) is value at v cc = 9v 11 out2 2.5 output pins for the video amplifier. with r l = 1k ? , (4.7) the differential output voltage is 3 vp-p. out1 and ina are in phase. out2 and inb are in phase. in the case of a single-ended output, bypass the unused pin to ground through a capacitor. 12 out1 2.5 (4.7) 13 v cc 2 5~9 supply voltage pin for the video amplifier block. this pin should be connected with a bypass capacitor (e.g., 1000 pf) to minimize ground impedance. 14 inb 2.5 input pins for the video amplifier. these pins have (4.1) high impedance. in the case of a single-ended input, bypass the unused pin to ground through a capacitor. 15 ina 2.5 (4.1) 16 g1b 1.7 gain control pins for the video amplifier. the gain (3.3) may be adjusted by varying the value of the resistor between pins 16 and 17. maximum gain = short; minimum gain = open. 17 g1a 1.7 (3.3) 18 mix out1 3.7 output pins for the downconverter. these are emitter follower outputs which feature low impedance. in the case of a single-ended output, bypass the unused pin to ground through a capacitor. 19 mix out2 3.7 20 gnd 0.0 ground pin. this pin must be connected to system ground. form ground pattern as wide as possible to minimize ground impedance. pin functions 11 12 13 17 15 13 14 16 reg 18 19 4 reg
upc2798gr measurement circuit 1 measurement circuit 2 agc & mixer block video amp block r l = 1k ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10nf 10nf 10nf mix out 50 ? agc in osc out v agc v cc 1 osc in 10nf 10nf 10nf 10nf 220nf 220nf 1nf 100k 100k 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10nf vcc 2 10nf 10nf 10nf 1nf 220nf 50 ? 50 ? 50 ? 1k ? 950 ? spectrum analyzer signal generator
upc2798gr measurement circuit 3 total block 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10nf vcc 2 10nf 10nf 10nf 1nf 220nf 50 ? 50 ? 50 ? 50 ? 950 ? spectrum analyzer signal generator measurement circuit 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10nf 10nf 10nf 10nf 10nf 1nf 220nf vcc2 5pf 1k 1k agc in osc out v agc v cc 1 osc in 10nf 10nf 10nf 10nf 220nf 220nf 1nf 100k 100k 50 ? spectrum analyzer 1k ? 950 ? video amp block r l = 50 ?
4-248 outline dimensions (units in mm) package outline ssop 20 all dimensions are typical unless specified otherwise. part number quantity UPC2798GR-E1-A 2500/reel ordering information upc2798gr internal block diagram notes: embossed tape, 12 mm wide. life support applications these nec products are not intended for use in life support devices, appliances, or systems where the malfunction of these prod ucts can reasonably be expected to result in personal injury. the customers of cel using or selling these products for use in such applications do so at their own risk and agree to fully indemnify cel for all damages resulting from such improper use or sale. exclusive north american agent for rf, microwave & optoelectronic semiconductors california eastern laboratories ?headquarters ?4590 patrick henry drive ?santa clara, ca 95054-1817 ?(408) 988-3500 ?telex 34-6393 ?fax (408) 988-0279 24-hour fax-on-demand: 800-390-3232 (u.s. and canada only) ?internet: http://www.cel.com 6/99 data subject to change without notice 20 11 1 10 7.00 max 6.4 0.2 4.4 0.1 1.0 0.1 0.5 0.2 0.15 1.8 max 1.5 0.1 0.22 0.65 0.575 max n +0.10 - 0.05 +0.10 - 0.05 nec c2798g xxxxx xxxxx = lot/date code 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 agc in1 agc in2 v agc v cc1 osc out gnd osc b2 osc c2 osc c2 osc b1 mix out 1 g 1 a gnd mix out 2 g 1 b v amp in1 v amp in2 v cc2 out 1 out 2 application circuit example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 10nf 10nf 10nf 10nf 10nf 1nf 220nf vcc2 5pf 1k 1k out 1 out 2 agc in osc out v agc v cc 1 10nf 1000pf 1000pf c v : isv209 vtu 10k 10k 1.2 h 10pf 10pf 20pf cv 10nf 220nf 220nf 1nf 100k 100k
4-249 4590 patrick henry drive santa clara, ca 95054-1817 telephone: (408) 919-2500 facsimile: ( 408 ) 988-0279 subject: compliance with eu directives cel certifies, to its knowledge, that semiconductor and laser products detailed below are compliant with the requirements of european union (eu) directive 2002/95/ec restriction on use of hazardous substances in electrical and electronic equipment (rohs) and the requirements of eu directive 2003/11/ec restriction on penta and octa bde. cel pb-free products have the same base part number with a suffix added. the suffix ? indicates that the device is pb-free. the ?z suffix is used to designate devices containing pb which are exempted from the requirement of rohs directive (*). in all cases the devices have pb-free terminals. all devices with these suffixes meet the requirements of the rohs directive. this status is based on cel? understanding of the eu directives and knowledge of the materials that go into its products as of the date of disclosure of this information. restricted substance per rohs concentration limit per rohs (values are not yet fixed) concentration contained in cel devices -a -az lead (pb) < 1000 ppm not detected (*) mercury < 1000 ppm not detected cadmium < 100 ppm not detected hexavalent chromium < 1000 ppm not detected pbb < 1000 ppm not detected pbde < 1000 ppm not detected if you should have any additional questions regarding our devices and compliance to environmental standards, please do not hesitate to contact your local representative. important information and disclaimer: information provided by cel on its website or in other communications concerting the substan ce content of its products represents knowledge and belief as of the date that it is provided. cel bases its knowledge and belief on information provided by third parties and makes no representation or warranty as to the accuracy of such information. efforts are underway t o better integrate information from third parties. cel has taken and continues to take reasonable steps to provide representative and ac curate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. cel and ce l suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall cel? liability arising out of such information exceed the total purchase price of the cel part(s) at issue s old by cel to customer on an annual basis. see cel terms and conditions for additional clarification of warranties and liability.

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