53007 ms im / 92706 / 33005 tn pc no.8268-1/8 specifications of any and all sanyo semiconductor co.,l td. products described or contained herein stipulate the performance, characteristics, and functions of t he described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer ' s products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, av equipment, communication device, office equipment, industrial equi pment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation mach ine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly t hreaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside th e scope of our intended standar d applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use. LA7795T overview the LA7795T bipolar monolithic ic is an agc amplifier with driver amplifier for analog-to-digital converters. it is ideally suited for use with receiver systems that r eceive qpsk and/or qam data transmissions. functions ? if agc control ? if agc amplifier ? if step gain controlled amplifier ? driver amplifier applications ? digital catv ? cable modem receivers ? ip telephony receivers specitications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max pin 1 7.0 v circuit voltages v max pin 4, pin 5 v cc op v circuit current i 6 i 7 pin 6 sink current pin 7 sink current 2 2 ma allowable power dissipation pd max ta 85 c 190* mw operating temperature topr -20 to +85 c storage temperature tstg -55 to +150 c *mounted on pcb (paper phenol 20.0 10.0 0.8 t mm) ordering number : en8268a monolithic linear ic agc amplifier with step gain control
LA7795T no.8268-2/8 recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc pin 1 5.0 v operating supply voltage range v cc op pin 1 4.5 to 5. 5 v electrical characteristics ac characteristics at ta = 25 c, v cc = 5.0 v ratings parameter symbol pin no. conditions min typ max unit circuit current itotal 1 no signal *1 18 24 30 ma if input frequency range f(in) 2, 3 fc : -3 db *1 30 - 100 mhz v4 = 3.0 v, f = 45 mhz pin 5 : v cc *2 - 5 - db v4 = 3.0 v, f = 45 mhz pin 5 : gnd *2 - 5 - db noise figure nf 6, 7 v4 = 3.0 v, f = 45 mhz pin 5 : open *2 - 8 - db intermodulation im3 6/2, 3 7/2, 3 f1 = 44 mhz, f2 = 45 mhz input = 90 db /tone, output = 104 db/tone *1 50 - - dbc g (agc1) v4 = 3.0 v, f = 45 mhz pin 5 : v cc *1 57.5 60 62.5 db g (agc2) v4 = 3.0 v, f = 45 mhz pin 5 : gnd *1 47.5 50 52.5 db total amplifier gain g (agc3) 6/2, 3 7/2, 3 v4 = 3.0 v, f = 45 mhz pin 5 : open *1 33.5 36 38.5 db agc range 1 gr1 6/2, 3 7/2, 3 if output level < 1 db, f = 45 mhz *1 40 - - db if output level v o (if) 6, 7 output level, f = 45 mhz *1 - 1.0 - vp-p agc control max. voltage v4h 4 gain max. *1 2.5 - 3.3 v agc control min. voltage v4l 4 gain min. *1 0 - 0.5 v input impedance zin 2, 3 v4 = 0 v, f = 45 mhz *3 - 1 // 4.9 - k ? // pf note) *1 : measurement circuit 1, *2 : measurement circuit 2, *3 : measurement circuit 3 package dimensions unit : mm (typ) 3245b sanyo : msop8(150mil) 3.0 1.1max 3.0 0.5 4.9 12 8 0.25 0.65 (0.53) (0.85) 0.125 0.08
LA7795T no.8268-3/8 block diagram pin functions pin number pin name descriptions 1 v cc 2 3 if input 4 agc control 5 gain control switch 6 7 driver output 8 gnd 2 3 1k ? 1k ? bias v cc 4 1k ? 5 v cc 10k ? 80k ? 20 ? 20 ? v cc 7 6 5.0m a 5.0ma v cc if input1 if input2 a gc control gnd driver output1 driver output2 gain control switc h 1 4 3 2 8 5 6 7 agc
LA7795T no.8268-4/8 LA7795T gain measurement circuit 1 LA7795T noise figure measurement circuit 2 LA7795T input impedance measurement circuit 3 LA7795T intermodulation measurement circuit 4 sw 1000pf 1000pf 200 ? 200 ? 51 ? agc voltage v cc toko 617db-1010 b4f 1000pf 1000pf 1 4 3 2 8 5 6 7 agc v cc 1000pf 1000pf 1000pf sg spectrum analyzer agc sg sw 1000pf 1000pf 200 ? 200 ? 51 ? agc voltage v cc toko 617db-1010 b4f 1000pf 1000pf 1 4 3 2 8 5 6 7 agc v cc 1000pf 1000pf 1000pf noise figure analyzer (source) noise figure analyzer (sense) 1 4 3 2 8 5 6 7 agc agc voltage v cc 1000pf 1000pf 1000pf network analyzer 51 ? sw v cc 1000pf 200 ? 51 ? 200 ? 51 ? 1000pf 1000pf 1000pf sw 1000pf 1000pf 200 ? 200 ? 51 ? agc voltage v cc toko input 617db-1010 b4f 1000pf 1000pf 1 4 3 2 8 5 6 7 agc v cc 1000pf 1000pf 1000pf sg spectrum analyzer output agc sg
LA7795T no.8268-5/8 30 50 40 20 10 0 -10 -20 -30 -40 70 60 -0.5 4.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 g ain - vagc c haracteristic voltage gain - db va g c - v 50 60 30 40 20 10 0 70 10 20 30 40 50 60 70 80 90 100 gain - frequency characteristic voltage gain - db frequency - mhz 30 35 20 15 25 10 5 0 40 10 15 20 25 70 65 50 30 35 55 40 60 45 noise figure - g ain c haracteristic noise figure - db voltage gain - db -20 -10 -40 -50 -60 -30 -70 -80 -90 -100 2.4 2.7 1.8 1.5 1.2 2.1 0.9 0.6 0.3 0 03.0 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 intermodulation characteristic o u tp u t / ton e - d b m va g c - v input / tone - dbm -20 -10 -40 -50 -60 -30 -70 -80 -90 -100 2.4 2.7 1.8 1.5 1.2 2.1 0.9 0.6 0.3 0 03.0 -70 -15 intermodulation characteristic o u tp u t / ton e - d b m va g c - v input / tone - db m -20 -10 -40 -50 -60 -30 -70 -80 -90 -100 2.4 2.7 1.8 1.5 1.2 2.1 0.9 0.6 0.3 0 03.0 -70 -15 intermodulation characteristic output / tone - dbm v a g c - v input / tone - dbm pin5:gnd pin5:v cc pin5:open im3 v a g c va g c o u t p u t output v cc = 5.0 v frequency = 45 mhz circuit1 v cc = 5.0 v, vagc = 2.5 v circuit2 v cc = 5.0 v, pin5 : open frequency = 44 mhz, 45 mhz, circuit4 im3 v a g c output v cc = 5.0 v, pin5 : v cc frequency = 44 mhz, 45 mhz, circuit4 im3 v a g c va g c o u t p u t output v cc = 5.0 v, pin5 : gnd frequency = 44 mhz, 45 mhz, circuit4 v cc = 5.0 v frequency = 45 mhz circuit2 p i n 5 : g n d p i n 5 : v c c p i n 5 : o p e n pin5:v cc pin5:gnd pin5:open the vertical axis (output/t one) on this graph shows the values displayed by the spectrum analyzer for circuit 4. the actual output power for the corresponding pins is given by the following formula. {output power [dbm]}= {displayed value [dbm]}+10 ? log (250 ? /50 ? )
LA7795T no.8268-6/8 30 50 40 20 10 0 -10 -20 -30 -40 70 60 -0.5 4.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 g ain - vagc c haracteristic voltage gain - db va g c - v 30 50 40 20 10 0 -10 -20 -30 -40 70 60 -0.5 4.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 gain - vagc characteristic voltage gain - db va g c - v 30 50 40 20 10 0 -10 -20 -30 -40 70 60 -0.5 4. 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 g ain - vagc c haracteristic voltage gain - db va g c - v 35 25 20 15 30 10 5 0 40 10 15 25 20 30 40 35 45 55 50 60 70 65 15 25 20 30 40 35 45 55 50 60 65 15 25 20 30 40 35 45 55 50 60 65 noise figure - gain characteristic noise figure - db voltage gain - db 35 25 20 15 30 10 5 0 40 10 70 noise figure - gain characteristic noise figure - db vo l t a g e gain - db 35 25 20 15 30 10 5 0 40 10 70 noise figure - gain characteristic noise figure - db voltage gain - db 8 5 2 5 v cc = 5.0 v pin5 : open, frequency = 45 mhz circuit1 8 5 2 5 v cc = 5.0 v pin5 : v cc , frequency = 45 mhz circuit1 pin5 : open, circuit2 8 5 2 5 pin5 : v cc , circuit2 8 5 2 5 pin5 : gnd, circuit2 85 2 5 8 5 2 5 v cc = 5.0 v pin5 : gnd, frequency = 45 mhz circuit1 - 2 0 -2 0 - 2 0 - 2 0 -2 0 - 2 0
LA7795T no.8268-7/8 the vertical axis (output/t one) on this graph shows the values displayed by the spectrum analyzer for circuit 4. the actual out p ut power for the corresponding pins is given by the following formula. {output power [dbm]}= {displayed value [dbm]}+10 ? log (250 ? /50 ? ) 50 60 55 40 45 35 30 25 20 70 65 10 100 20 30 40 50 60 70 80 90 g ain - frequency c haracteristic voltage gain - db frequency - mhz 50 60 55 40 45 35 30 25 20 70 65 10 100 20 30 40 50 60 70 80 90 gain - frequency characteristic vo l t a g e g a i n - d b frequency - mhz 50 60 55 40 45 35 30 25 20 70 65 10 10 0 20 30 40 50 60 70 80 90 g ain - frequency c haracteristic voltage gain - db frequency - mhz -20 -10 -40 -50 -60 -30 -70 -80 -90 -100 0 -70 -65 -60 -55 -50 -45 -40 -35 -25 -20 -30 -65 -60 -55 -50 -45 -40 -35 -25 -20 -30 -65 -60 -55 -50 -45 -40 -35 -25 -20 -30 -15 intermodulation characteristic o utput / ton e - d b m input / tone - dbm -20 -10 -40 -50 -60 -30 -70 -80 -90 -100 0 -70 -15 intermodulation characteristic o utput / ton e - d b m input / tone - dbm -20 -10 -40 -50 -60 -30 -70 -80 -90 -100 0 -70 -15 intermodulation characteristic output / tone - dbm input / tone - dbm 25 85 v cc = 5.0 v pin5 : open vagc = 2.5 v circuit1 2 5 85 v cc = 5.0 v pin5 : v cc vagc = 2.5 v circuit1 2 5 8 5 2 5 8 5 2 5 85 v cc = 5.0 v pin5 : gnd vagc = 2.5 v circuit1 v cc = 5.0 v, pin5 : open frequency = 44 mhz, 45 mhz, circuit4 im3 output v cc = 5.0 v, pin5 : v cc frequency = 44 mhz, 45 mhz, circuit4 im3 output 2 5 8 5 2 5 8 5 25 8 5 2 5 8 5 v cc = 5.0 v, pin5 : gnd frequency = 44 mhz, 45 mhz, circuit4 im3 output -20 -20 -20 - 2 0 - 2 0 - 2 0 - 2 0 - 2 0 - 2 0
LA7795T no.8268-8/8 ps this catalog provides information as of may, 2 007. specifications and info rmation herein are subject to change without notice. sanyo semiconductor co.,ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qu ality high-reliability pr oducts, however, any and all semiconductor products fail or malfunction with some proba bility. it is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damag e to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. upon using the technical information or products descr ibed herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagrams and circuit par ameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor co .,ltd. products described or contained herein are controlled under any of applicable local export control l aws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd.
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