specifications of any and all sanyo semiconductor co.,l td. products described or contained herein stipulate the performance, characteristics, and functions of the 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 el ectronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment 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, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m 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 the scope of our intended standard 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. 31208 ms b8-8106 no.a1144-1/4 LA7791T overview the LA7791T is variable gain controlled amplifier with up stream driver. it is ideally suited for use with qam/qspk transmitter system. functions ? differential input amplifier ? attenuator amplifier ? driver amplifier with differential output ? power save function (power save control pin) ? shut down function (shut down control pin) ? serial bus interface specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max pin 2,19 6.0 v maximum voltages1 vin max pin 8,9,10,12,18 v cc v maximum voltages2 vout max pin 15,16 8.0 v allowable power dissipation pdmax ta<=+75 c 830 mw operating temperature range topr -20 to +75 c storage temperature range tstg -55 to +150 c monolithic linear ic for catv/cable modem variable gain controlled amplifier orderin g numbe r : ena1144
LA7791T no.a1144-2/4 recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc pin 2,19 5.0 v operating supply voltage range v cc op pin 2,19 4.75 to 5.25 v electrical characteristics at ta = 25 c, v cc = 5v, vin = 29dbmv diff., f = 20mhz , rin = 75 ? , rout = 75 ? , unless otherwise noted. ratings parameter symbol pin no. conditions min typ max unit quiescent current 1 i cco -1 2,15,16,19 0 to 15db attenuation 180 ma quiescent current 2 i cco -2 2,15,16,19 16 to 63db attenuation 90 ma quiescent current 3 i cco -ps 2,15,16,19 power save mode (txen:v18=0v) 6.6 ma quiescent current 4 i cco -swsd 2,15,16,19 software shut down mode (d7=0) 3.4 ma quiescent current 5 i cco -sd 2,15,16,19 shut down mode (sd:v12=0v) 1.2 ma input characteristics input impedance zin 5,6 1.6 2 2.4 k ? overall characteristics gain flatness rfrq 5,6,15,16 vout=60dbmv diff, f=5 to 42mhz, ref at 20mhz 0.5 db gain flatness rfrq 5,6,15,16 vout=60dbmv diff, f=5 to 65mhz, ref at 20mhz 1.5 2.0 db gain control range gcont 5,6,15,16 f=20mhz, differential output 63 db maximum gain gmax 5,6,15,16 f=20mhz , differential output 31.2 33.7 36.2 db minimum gain gmin 5,6,15,16 f=20mhz , differential output -29.3 db gain step gstep 5,6,15, 16 f=20mhz, differential output 0.7 1 1.3 db im2 im2 5,6,15,16 40mhz and 40.2mhz 54dbmv/tone diff. 50 65 dbc im3 im3 5,6,15,16 40mhz and 40.2mhz 54dbmv/tone diff. 46 62 dbc output characteristics output signal level vo 5,6,15,16 differential output 63 dbmv output noise level vn 5,6,15,16 differential output 187 300 nv hz switching transients voltage vtran 5,6, 15,16 differential output 5 100 mv power save characteristics (low active: low---power save mode) power save attenuation att-ps 5,6,15,16, 18 vin=29dbmv, 5 to 70mhz, vin/vout 59 85 db setting time tset 15,16,18 txen(18pin) on/off 2 us power save on voltage vps-on 15,16,18 low, txen off 0.8 v power save off voltage vps-off 15,16,18 high, txen on 2.0 v cc v shut down characteristics (low active: low---shut down mode) shut down on voltage vshut-on 12,15,16 low, sd(12pin) on 0.8 v shut down off voltage vshut-off 12, 15,16 high, sd(12pin) off 2.0 v cc v
LA7791T no.a1144-3/4 6.4 0.65 4.4 (0.33) (1.0) 6.5 0.5 0.15 1 10 20 11 0.22 0.08 1.2max side view bottom view exposed die-pad top view sanyo : tssop20j(225mil) serial timing characteristics ratings parameter symbol pin no. conditions min typ max unit ce to cl rise setup time t sens 8,10 100 ns ce to cl rise hold time t senh 8,10 100 ns di to cl setup time t sdas 9,10 100 ns di to cl hold time t sdah 9,10 100 ns di pulse width high t datah 9 200 ns di pulse width low t datal 9 300 ns cl pulse width high t sckh 10 200 ns cl pulse width low t sckl 10 300 ns ce cl di ab c def g d7 d6 d5 d4 d3 d2 d1 d0 msb lsb a) t sens e) t sckh b) t sdatah /t sdatal f) t sckl c) t sdas g) t senh d) t sdah package dimensions unit : mm (typ) 3279
LA7791T ps no.a1144-4/4 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, 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-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probabi lity. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed 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 f or 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 diagr ams and circuit parameters) 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 equi pment, 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 c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned 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 in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. block diagram and application circuit example 1 2 3 4 5 6 7 8 9 10 sirial data interface 20 19 18 17 16 15 14 13 12 11 shut down control input drive attenuator 75 ? signal output v cc (5v) 0.1 f 6800pf txen v cc (5v) 0.1 f 0.1 f sd toko 458pt-1087 4:1 impedance ratio ce di cl sirial data in p ut signal input 1000pf 1000pf v cc (5v) gnd1 gnd2 this catalog provides information as of march, 2008. specifications and information herein are subject to change without notice.
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