bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com 3-1/2 digit lcd/led display, a/d converter icl7106 / 7107 pin connection ordering information device package temp. icl7106p 40pdip 0 to 70 c ICL7107P 40pdip 0 to 70 c description the icl7106 and icl 7107 are high performance, low power 3-1/2 digit a/d converters. included are seven segment decoders, display drivers, a reference and a clock. the icl 7106 is designed to interf ace with a liquid crystal display (lcd and includes a multiplexed backplane drive; the icl 7107 will directly drive an instrument size light emitting diode (led) display. the icl7106 and icl 7107 bring together a combination of high accuracy, versatility and true ec onomy. true differential inputs and reference are useful in all systems, but give the designer advantage when measuring load cells, strain gauges, and other bridge type transducers. by providing the true economy of a single power supply operation, the icl7106 enables a high performance panel meter to be built with the addition of only 10 passive components and a display. features ? guaranteed zero reading for ov input on all scales ? true polarity at zero for precise null detection ? true differential input and reference, direct display drive ? low noise less than 15 vp-p ? on chip clock and reference ? low power dissipation, 10mw (typ.) ? no additional active circuits required ? available in small outline surface mount package, 44mqfp applications ? 7106 for lcd ? 7107 for led ? measuring bridge type transducers ? instrumentation ? digital thermometers 1 v+ 2 d1 3 c1 4 b1 5 a1 6 f1 7 g1 8 e1 9 d2 10 c2 11 b2 12 a2 13 f2 14 e2 15 d3 16 b3 17 f3 18 e3 19 ab4 20 pol osc1 40 bp 21 g3 22 a3 23 c3 24 g2 25 v- 26 in hi 31 in lo 30 a-z 29 buff 28 int 27 test 37 ref hi 36 ref lo 35 c ref + 34 c ref - 33 com 32 osc2 39 osc3 38 ( 100?s ) ( 100?s ) ( 10?s ) ( 1?s ) ( 1000 ) ( minus ) bay linear bay linear bay linear bay linear icl7106p for 7107, pin 21 is gnd (1 0 ? s) bay linear bay linear bay linear bay linear ins p ire the linear power ins p ire the linear power ins p ire the linear power ins p ire the linear power
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com icl7106 / 7107 absolute maximum rating thermal information parameter parameter input supply voltage thermal resistance, typical ja ( c/w) icl7106 , v+ to v - 15v pdip 50 icl7107, v+ to gnd 6v mqfp 75 icl7107, v - to gnd - 9v max. junction temperature 150 c analog input voltage (either input) (note 1) v+ to v - max. storage temperature range -65 c to 150 c reference input voltage (either input) v+ to v - max. lead temperature (soldering 10s) mqfp ? lead tips only 300 c clock input icl7106 test to v+ operating temperature range 0 c to 70 c icl7107 gnd to v+ electrical characteristics (t a = 25 c , f clock = 48khz unless otherwise specified, see note 2) parameter conditions min typ max unit system performance zero input reading v in = 0.0v, full scale = 200mv -000.0 000.0 000.0 digital reading ratiometric reading v in = v ref , v ref = 100mv 999/1000 rollover error -v in = +v in ? 200mv difference in reading for equal positive and negative inputs near full scale -1 +1 counts linearity full scale = 200mv or full scale = 2v maximum deviation from best straight line fit (note 3) -1 +1 counts common mode rejection ratio v cm = 1v, v in = 0v, full scale = 200mv (note 3) 50 v/v end power supply character v+ supply current v in = 0 (does not include led current for icl7107) 1.8 ma end power supply character v- supply current icl7107 only 1.8 ma common pin analog common voltage 25 k ? between common and positive supply ( with respect to + supply 2.4 3.2 v display driver icl7106 only pk-pk segment drive voltage pk-pk backplane drive voltage v+ = to v- = 9v 4 5 6 v display driver icl7107 only segment sinking current (except pin 19 and 20) v+ = 5v, segment voltage = 3v 5 8 ma pin 19 only 10 16 ma pin 20 only 4 7 ma notes: 1. input voltages may exceed the supply voltages provided the input current is limited to 100 a. 2. unless otherwise noted, specifications apply to both the icl7106 and icl7107 at t a = +25 c, f clock = 48khz. icl7107 is tested in the circuit of figure 1. icl7107 is tested in the circuit of figure 2. 3. not tested, guaranteed by design
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com icl7106/7107 typical applications and test circuits figure 1. icl7106 test circuit and typical application with lcd display components selected for 200mv full scale. figure 2. icl7107 test circuit and typical application with led display components selected for 200mv full scale.
bay linear, inc 2478 armstrong street, livermore, ca 94550 tel: (925) 989-7144, fax: (925) 940-9556 www.baylinear.com design information summary sheet !" oscillator frequency summary sheet f osc = 0.45/rc c osc > 50pf; r osc > 50k ? f osc (typ) = 48khz !" oscillator period t osc = rc/0.45 !" integration clock frequency f clock = f osc /4 !" integration period t int =1000 x (4/f osc ) !" 60/50hz rejection criterion t int /t 60hz or t int /t 60hz = integer !" optimum integration current i int = 4 a !" full scale analog inout voltage v infs (typ) = 200mv or 2v !" integration resistor r int = v infs i int !" integration capacitor c int = (t int )(i int ) v int !" integrator output voltage swing v int = (t int )(i int ) c int !" v int maximum swing (v- + 0.5v) < v int < (v+ = -0.5v), v int (typ) = 2v !" display count count = 1000 x v in v ref !" conversion cycle t cyc = t clock x 4000 t cyc = t osc x 16,000 when f osc = 48khz; t cyc = 333ms !" common mode input voltage (v- + 1v) < v in < (v+ = -0.5v) !" auto-zero capacitor 0.01 f < c az < 1 f !" reference capacitor 0.01 f < c ref < 1 f !" v com biased between vi and v- !" v com ? ? ? ? v+ - 2.8v regulation lost when v+ to v- < ? 6.8v if v com is externally pulled down to (v+ to v-) / 2, the v com circuit will turn off. !" icl7106 power supply: single 9v v+ - v- = 9v digital supply is generated internally v gnd ? v+ - 4.5v !" icl7106 display: lcd direct drive type with digital logic supply amplitude. !" icl7107 power supply: dual 5.0v v+ = +5v to gnd v- = -5v to gnd digital logic and led driver supply v+ to gnd !" icl7106 display: led non-multiplexed common anode advance information - these data sheets contain descriptions of products that are in development. the specifications are based on the engineering ca lculations, computer simulations and/ or initial prototype evaluation. preliminary information - these data sheets contain minimum and maximum specifications that are based on the initial device characterizations. these lim its are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges. the application circuit examples are only to explain the representative applications of the devices and are not intended to gua rantee any circuit design or permit any industrial property right to other rights to execute. bay linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. typical parameters can and do vary in different applications. customer?s technical experts must validate all operating parameters including ? typical? for each customer applic ation. life support and nuclear policy bay linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, sp ace equipment, submarine, or nuclear facility applications wit hout the specific written consent of bay linear president.
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