advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 advanced ams222 monolithic complimentary output osci llator/clock generator systems rohs compliant features applications ? low-cost, oscillator/clock generator ? switch-mode power supplies ? simple user programming ? servers ? output frequency programmable from 10 khz to 6mhz ? printers ? 2.7 to 15v single-supply operation ? embedded microcontrollers ? output frequency tolerance <1% ? industrial controls ? complementary output signal ? automotive applications ? break before make output signal ? toys general description the ams222 is a low-cost, oscillator intended to be used as an external clock for low-frequency applications. the device consists of a resistor-programmed oscillator with complementary ou tput stage. an external resistor allows for output frequency range to be adjusted from 10khz to 6mhz. the complimentary output stage is very useful in paralleling, switching regulators for doubling the output current. ams222 is offered in sot-23 5-leads package. ordering information: pin connections max. package type operating offset 5 lead sot-23 temp. range 15mv AMS222AM1 -40 to +125 c typical application ams222 used to sync. ams4155 to >400khz 5l sot-23 (m1) top view
advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 ams222 absolute maximum ratings (note 1) voltage range on vcc -0.5v to +16v operating temperature range -40oc to +125oc storage temperature range -55oc to +125oc stresses beyond those listed under ?absolut e maximum ratings? may cause permanent dama ge to the device. these are stress rating s only, and functional operation of the device at these or any other c onditions beyond those indicated in the operational sections of t he specifications is not implied. exposure to absolute maximum rating conditions fo r extended periods may affe ct device reliability. dc electrical characteristics electrical characteristics at t a = -40oc to +125oc and v cc = +3.0c to 5.5v unless otherwise noted. parameter conditions ams222 min. typ. max. units supply current c l = 15pf, v cc = 3.3v, r set = 12.5 k ? c l = 15pf, v cc = 5.5v, r set = 12.5 k ? 1.0 1.0 1.2 1.5 ma high-level output voltage (out) i oh = -1.5ma v cc = 3.3v 2.5v v low-level output voltage (out) i oh = -1.5ma 0.4 v ac electrical characteristics electrical characteristics at t a = -40oc to +125oc and v cc = +3.0c to 5.5v unless otherwise noted. parameter conditions ams222 min. typ. max. units output frequency tolerance v cc = 3.3v, t a = +25oc -1.0 +1.0 % voltage frequency variation t a = +25oc, r set = 12.5 k ? v cc = 3.3v to 5.0 v (note 2) t a = +25oc, r set = 12.5 k ? vcc = 5.0v to 10v (notes 2) -0.25 -0.5 +0.25 +0.5 % temperature frequency variation v cc = 3.3v (note 3) -2.0 +2.0 % load capacitance (note 4) 30 pf output duty cycle 10khz to 1mhz, t a = +25oc (note 3) 1mhz to 2 mhz (note 4) 48 46 49.5 48 % output rise/fall time c l = 15pf, v cc = 3.3v 20 30 ns note 1: all voltage referenced to ground. note 2: this is the change observed in output frequency due to changes in voltage. note 3: parameter is guaranteed by design and is not production tested. note 4: output voltage swings can be impaired at high frequencies combined with high output loading.
advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 ams222 typical characteristics channel 2 rise and channel 1 fall time @ vc c = 3.3v, c1 = 15pf channel 1 rise and channel 2 fall time @ vcc= 3.3v, c1= 15pf break before make approximate 520mv @ vc c= 3.3v, c1= 15pf channel 1 and 2 waveform @ 500 khz , vcc= 3.3v, c1= 15pf channel 1 duty cycle @ vcc= 3.3v, c1= 15pf channel 2 duty cycl e @ vcc= 3.3v, c1= 15pf
advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 ams222 typical characteristics (continued) channel 1 and channel 2 waveform @ vcc = 5v, c1= 15pf vcc= 5.0v, c1 = 15pf channel 1 fall time channel 2 rise time vcc = 5.0v, c1= 15pf waveform @ 4m hz and vcc= 3.3v (vertical scale 500mv/div) channel 2 fall time channel 1 rise time
advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 ams222 typical characteristics (continued) 2.9 2.8 2.7 2.6 2.5 2.5 2.0 1.5 1.0 0.5 0 v cc = 3.3v output voltage high vs. output current output current (ma) 50.0 49.5 49.0 48.5 48.0 -40 -15 10 50 100 125 duty cycle vs.temperature temperature (oc) r= 12.5kw, v cc = 3.3v 1.0 0.5 0 -0.5 -1.0 2 4 6810 12 supply voltage (v) frequency error vs. supply voltage (from 3.3v) t a = +25oc 12.5kw 1.70 1.45 1.20 0.95 0.70 2.0 4.0 6.0 8.0 10.0 12.0 12.5kw c l =15pf, t a =+25oc supply current vs. supply voltage supply voltage (v) 0.4 0.3 0.2 0.1 0 00.5 1.0 1.5 2.0 2.5 v cc = 3.3v output voltage low vs. output current output current (ma) 1.50 1.30 1.10 0.90 0.70 0.50 -40 -15 10 50 100 125 c l =15pf, v cc =3.3v 12.5kw temperature (oc) supply current vs. temperature 2.0 1.5 1.25 1.0 0 510 15 20 25 30 35 40 t a = +25oc, r set = 40w 10v 5v 3.3v 2.7v supply current vs. output loading load capacitance (pf) 0.9 0.8 0.7 0.6 0.5 0.4 0.3 3.0 5.0 7.0 9.0 11.0 13.0 output frequencyvs. supply voltage t a = +25oc supply voltage (v) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 -40 -15 -10 50 100 125 v cc = 3.3v temperature (oc) output frequencyvs. temperature
advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 ams222 typical characteristics (continued) 1.0 0.5 0 -0.5 -1.0 -40 -15 -10 50 100 125 v cc = 3.3v temperature (oc) 12.5kw frequency error vs. temperature (from +25oc) 1 10 100 1000 1 2 3 4 5 6 f set resistor output frequency vs. r-f set typical application circuit ams222 used as clock signal to sy nchronize two switch ing regulators product description ams222 is a silicon clock generator with complementary output, programmable frequency using a single resistor from 10khz to 6mhz. the output b is 180o phase from output a, and the signals do not overlap does allow to drive cr itical circuits where break-befo re- make is very important. it operates from as low as 2.7v to high 15v consuming just 1.2ma of power. the output drive is capable to drive capacitive loads up to 50pf and resistive loads up to 3ma. the high stability of the output frequency and it?s immunit y to supply variation is due to internal temperature compensated volta ge reference. having a good power supply rejection ratio, the device works very well in electrically noisy environments. the only critical element is the fset resistor that should be placed as close as possible to the package to avoid parasitic capacitance and pcb traces cross-talk.
advanced monolithic systems, inc. www.advanced-monolithic.com phone (925) 443-0722 fax (925) 443-0723 ams222 package dimensions inches (millimeters) unless otherwise noted. 5 lead sot-23 plastic package (m1) 0.059-0.070 (1.50-1.75) 0.014-0.020 (0.350-0.50) 0.110-0.120 (2.794-3.048) 0.102-0.118 (2.60-3.00) 0.037 (0.95) typ 0.075 (1.90) typ 0.018-0.024 (0.457-0.610) 10 nom 0.0035-0.0080 (0.090-0.20) (sot-23-5 ) ams drw# 051001 0.036-0.051 (0.090-1.30) 0.003 (0.150) max 0.018-0.024 (0.457-0.610) 10 nom
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