this document is for maintenance purposes only and is not recommended for new designs
admittance (mmho) SL1610c SL1610c conductance susceptance 7 6 5 4 3 2 1 0 -1 0.1 1.0 10 100 frequency (mhz) sl1612c sl1612c SL1610 & sl1612 rf/if amplifier the SL1610c and sl1612c are rf voltage amplifier with agc facilities. the voltage gain is 10, 20 and 50 times respectively and the upper frequency response varies from 15mhz to 120mhz according to type . dp8 fig.1 pin connections (top view) 6 input bias 48 5 input 7 agc 2 vcc 3 output fig.2 block diagram ds3846 - 1.0 nc vcc output input earth 8 7 6 5 0v agc input bias input 1 2 3 4 SL1610 sl1612 fig.3 input admittance with o/c output (g 11 ) features wide agc range: 50db easy interfacing integral power supply rf decoupling applications rf amplifiers if amplifiers quick reference data supply voltage: 6v voltage gain: 20db to 34db absolute maximum ratings supply voltage: 12v storage temperature: -55 c to \+\150 c operating temperature range: -30 c to +85 c chip operating temperature: +150 c thermal resistance chip-to-ambient 111 c/w chip-to-case 71 c/w ordering information SL1610/1/2 c dp
SL1610 & sl1612 impedance ( ) 80 60 40 20 0 -20 -40 -60 -80 0.1 1.0 10 100 frequency (mhz) 100 -100 resistance reactance SL1610c SL1610c sl1210c sl1210c electrical characteristics the characteristics are guaranteed over the following test conditions (unless otherwise stated): supply voltage vcc: 6v ambient temperature: +25 c test frequency: SL1610c 30mhz sl1612c 1.75mhz circuit SL1610c sl1612c SL1610c sl1612c SL1610c sl1612c SL1610c sl1612c characteristics supply current voltage gain cut-off frequency (-3db) max. output signal (max. agc) max.input signal (max. agc) agc range agc current 17 31 40 60 15 3.3 20 34 120 15 1.0 250 50 70 0.15 24 6 24 38 0.6 ma ma db db mhz mhz v rms mv rms db db ma units min. typ. max. conditions no signal, pin 3 open circuit r s = 50 w t amb = 150 w rl = 150 w (SL1610c/1611c) rl = 1.2k w (sl1612c) current into pin 7 at 5.1v value application notes input circuit the SL1610c and sl1612c are normally used with pins 5 and 6 connected together and with the input connected via a capacitor as shown in fig.2. the input impedance is negative between 30mhz and 100mhz (SL1610c only) and is shown in fig.3. the source and inductive is should be shunted by a 1k w resistor to prevent oscillation. an alternative circuit with improved noise figure is shown in fig.4. agc when pin 7 is open circuit or connected to a voltage less than 2v the voltage gain is normal. as the agc voltage is increased there is a reduction in gain as shown in fig.6. this reduction varies with temperature. fig.5 typical output impedance with s/c input (g22) output circuit the output stage is an emitter follower and has a negative output impedance at certain frequencies as shown in fig.5. to prevent oscillation when the load is capacitive a 47 w resistor should be conncted in series with the output. fig.4 alternative input circuit 4 8 3 5 6
SL1610 & sl1612 typical applications the circuit of fig.7 is a general purpose rf preamplifier. the voltage gain (from pin 5 to pin 3) is shown in fig.8. fig.9 is the if section of a simple ssb transceiver. at 9mhz it has a gain of 100db. fig.8 typical voltage gain (rs = 50 w ) fig.6 agc characteristics (typical) fig.7 rf preamplifier 0.01 6 5 2 3 8 7 4 0.01 ri 47 output +6v input 0.1 fig.9 if amplifier using sl1612 0 -10 -20 -30 -40 -50 -60 -70 0 1.0 2.0 3.0 4.0 5.0 agc signal (v) relative gain (db) SL1610c sl1612c sl1612c 40 30 20 0.1 1.0 10 100 10 frequency (mhz) voltage gain (db) SL1610c sl1612c
SL1610 & sl1612 headquarters operations gec plessey semiconductors cheney manor, swindon, wiltshire sn2 2qw, united kingdom. tel: (0793) 518000 fax: (0793) 518411 gec plessey semiconductors p.o. box 660017 1500 green hills road, scotts valley, california 95067-0017, united states of america. tel: (408) 438 2900 fax: (408) 438 5576 this publication is issued to provide information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. no warranty or guarantee express or implied is made regard ing the capability, performance or suitability of any product or service. the company reserves the right to alter without prior knowledge the specification, design or price of any product or service. information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. it is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. these products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. all products and materials are sold and services provided subject to the company's conditions of sale, w hich are available on request. customer service centres ? france & benelux les ulis cedex tel: (1) 64 46 23 45 fax : (1) 64 46 06 07 ? germany munich tel: (089) 3609 06-0 fax : (089) 3609 06-55 ? italy milan tel: (02) 66040867 fax: (02) 66040993 ? japan tokyo tel: (03) 5276-5501 fax: (03) 5276-5510 ? north america scotts valley, usa tel (408) 438 2900 fax: (408) 438 7023. ? south east asia singapore tel: (65) 3827708 fax: (65) 3828872 ? sweden stockholm tel: 46 8 702 97 70 fax: 46 8 640 47 36 ? taiwan, roc taipei tel: 886 2 5461260. fax: 886 2 7190260 ? uk, eire, denmark, finland & norway swindon tel: (0793) 518510 fax : (0793) 518582 these are supported by agents and distributors in major countries world-wide. ? gec plessey semiconductors 1994 publication no. ds3846 issue no. 1.0 june 1994 technical documentation - not for resale. printed in united kingdom.
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