View TS302_4996266.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ts3002 page 1 ? 2012 touchstone semiconductor, inc. all rights reserved. features ? ultra low supply current: 1a at 25khz ? sup ply voltage operation: 0.9v to 1.8 v ? programmable frequency range: o 5.2khz fout 90khz (boost = gnd) o 5.2khz fout 290khz (boost = vdd) ? fout period drift : 0.044 %/ c ? pwmout duty cycle range: 1 2 % to 90% ? single resistor and capacitor set output frequency ? outpu t driver resistance: 1 6 0? applications portable and battery - powered equipment low - parts - count nanopower oscillator compact nanopower replacement for crystal and ceramic oscillators nanopower pulse - width modulation control nanopower pulse - position modulation control nanopower clock generation nanopower sequential timing description the ts3002 is the industrys first and onl y single - supply cmos oscillator fully specified to operate at 1v while consuming a 1a supply current at an output frequency of 25khz. this oscillator is compact, easy - to - use, and versatile. optimized for ultra - long life, battery - powered applications, the ts3002 is touchstones first oscillator in the nanowatt analog? high - performance analog integrated circuits portfolio. t he ts3002 can operate from sing l e - supply voltages from 0.9v to 1.8 v. requiring only a resistor and a capacitor t o set the output frequency, the ts3002 represent s a 66% reduction in pcb area and a factor - of - 10 reduction in power consumption over other cmos - based integrated circuit oscil lators. when compared against industry - standard 555 - time r - based products, the ts3002 offer s up to 93% reduction in pcb area and four orders of magnitude lower power consumption. the ts3002 is fully specified over the - 40c to +85c temperature range and i s available in a low - profile, 8 - pin 2x2mm tdfn package with an exposed back - side paddle . a 1v/1a easy - to - use silicon oscillator/timer typical application circuit supply current - a percent of units - % 0% supply current distribution 0.97 5% 10% 15% 20% 25% 30% 35% 0.99 1.01 1.03 t he touchstone semicondu c tor logo is a registered trademark of touchstone semiconductor, incorporated.
ts3002 page 2 ts3002ds r1p0 rtfds absolute maximum ratings v dd to gnd ................................ ................................ .. - 0.3v to +2 v v cntrl to gnd ................................ .............................. - 0.3v to +2v rset to gnd ................................ .............................. - 0.3v to +2v cset to gnd ................................ .............................. - 0.3v to +2v f out , pwmout to gnd ................................ ............ - 0.3v to +2 v short circuit duration fout, pwmout to gnd or v dd ................................ ................................ ................ continuous continuous power dissipation (t a = +70c) 8 - pin tdfn ( derate at 23.8 mw/c above +70c) ....... 1951 mw operating temperature range ................................ - 40c to +85c storage temperature range ................................ . - 65c to +150c lead temperature (s oldering, 10s) ................................ ..... +300c electrical and thermal s tresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifica tions is not implied. exposure to any absolute maximum rating conditions for extended periods may affect device reliability and lifetime . package/ordering information order number part marking carrier quantity ts300 2 itd822t p aah tape & reel ----- ts300 2 itd822t tape & reel 3000 lead - free program: touchstone semico nductor supplies only lead - free packaging. consult touchstone semiconductor for products specified with wider operating temperature ranges.
ts3002 ts3002ds r1p0 page 3 rtfds electrical character istics v dd = 1 v, v cntrl = v dd , v boost = 0v, r set = 4.32m? c set = 7.9pf, r load(fout) = open circuit, c load(fout) = 0pf, c load(pwm) = 0pf unless otherwise noted. v alues are at t a = 25c unless otherwise noted. see note 1. parameter symbol conditions min typ max units supply voltage v dd 0.9 1 1.8 v supply current i dd 1 1.5 a - 40c t a 85c 2.8 v cntrl = 0.15 x v dd 2.1 3.7 - 40c t a 85c 5.4 v boost = v dd 2.16 3.2 - 40c t a 85c 4.8 v boost = v dd, v cntrl = 0.15 x v dd 3.6 5.3 - 40c t a 85c 7.3 fout period t fout 37 40.6 44 s - 40c t a 85c 34.7 45.6 v boost = v dd 36 39.5 43 - 40c t a 85c 33 48 fout period line regulation t fout /v 1v v dd 1.8 v 1.3 %/v v boost = v dd - 1.6 fout period temperature coefficient t fout /t 0.04 4 %/c v boost = v dd 0.08 6 pwmout duty cycle dc(pwmout) v cntrl = 0.03 x v dd 4.5 8.9 13 % v cntrl = 0.15 x v dd 44 49.3 54 v cntrl = 0.27 x v dd 83 90.5 97 v cntrl = 0.03 x v dd v boost = v dd 4.5 8.5 12.5 v cntrl = 0.15 x v dd 47 50.4 54 v cntrl = 0.27 x v dd 86 91.2 96 fout, pwmout rise time t rise see note 2, c l = 15pf 8.6 ns fout, pwmout fall time t fall see note 2, c l = 15pf 7.9 ns fout jitter see note 3 0.08 % rset pin voltage v(rset) 0.3 v cntrl output current i cntrl 25 45 na - 40c t a 85c 80 pwmout enable v pwm_en ( v dd - v cntrl ), 0.9v < v dd < 1.8v 375 mv pwmout disable v pwm_dis ( v dd - v cntrl ), 0.9v < v dd < 1.8v 131 mv boost enable v ih ( v dd C v boost ), 0.9v < v dd < 1.8v 77 mv boost disable v il 0.9v < v dd < 1.8v 77 mv boost input current i boost 10 na high level output voltage, fout and pwmout v dd - v oh i oh = 1ma 160 mv low - level output voltage, fout and pwmout v ol i ol = 1ma 140 mv note 1: all devices are 100% production tested at t a = +25c and are guaranteed by characterization for t a = t min to t max , as specified. note 2: output rise and fall times are measured between the 10% and 90% of the v dd power - supply voltage levels. the specification is based on lab bench characterization and is not tested in production. note 3 : timing jitter is the ratio of the peak - to - peak variat ion of the period to the mean of the period. the specification is based on lab bench characterization and is not tested in production.
ts3002 page 4 ts3002ds r1p0 rtfds typical performance characteristics v dd = 1 v, v cntrl = v dd , v boost = 0v, r set = 4.32m? c set = 7.9pf, r load(fout) = open circuit, c load(fout) = 5pf, unless otherwise noted. v alues are at t a = 25c unless otherwise noted. period - s supply current - a 40 80 1.5 0.5 supply current vs fout period 0 120 2 2.5 1 160 200 period - s supply current - a 4.3 1.5 8.5 supply current vs fout period 5.7 7.1 2.9 c load - pf supply current - a 10 20 2.4 2 3 supply current vs c load(fout) 0 30 2.6 2.8 2.2 40 3.2 supply voltage - volt period - s 1.05 1.2 40.6 40.4 41.2 fout period vs supply voltage 0.9 1.35 40.8 41 1.5 40 80 0 120 160 200 c load - pf supply current - a 10 20 1.2 0.8 1.8 supply current vs c load(fout) 0 30 1.4 1.6 1 40 2 1.65 1.8 supply voltage - volt period - s 1.05 1.2 39 38.8 39.6 fout period vs supply voltage 0.9 1.35 39.2 39.4 1.5 1.65 1.8 39.8 40 boost = v dd boost = v dd boost = v dd boost = gnd boost = gnd boost = gnd
ts3002 ts3002ds r1p0 page 5 rtfds typical performance characteristics v dd = 1 v, v cntrl = v dd , v boost = 0v, r set = 4.32m? c set = 7.9pf, r load(fout) = open circuit, c load(fout) = 5pf, unless otherwise noted. v alues are at t a = 25c unless otherwise noted. temperature - oc period - s - 15 10 40.5 39.5 42 fout period vs temperature - 40 35 41 41.5 40 60 85 supply voltage - volt start - up time - ms 1.2 1.24 1.1 1.66 start - up time vs supply voltage 0.9 1.38 1.52 1.5 temperature - oc supply current - a 1.08 0.8 supply current vs temperature 1.22 1.36 0.94 1.5 1.8 42.5 43 temperature - oc period - s - 15 10 39 38 fout period vs temperature - 40 35 39.5 40 38.5 60 85 40.5 41 41.5 - 15 10 - 40 35 60 85 temperature - oc supply current - a 2.24 1.6 supply current vs temperature 2.56 2.88 1.92 3.2 - 15 10 - 40 35 60 85 1.8 r set - m period - s 4 8 80 0 200 period vs r set 0 12 120 160 40 16 20 boost = v dd boost = v dd boost = gnd boost = gnd boost = gnd
ts3002 page 6 ts3002ds r1p0 rtfds typical performance characteristics v dd = 1 v, v cntrl = v dd , v boost = 0v, r set = 4.32m? c set = 7.9pf, r load(fout) = open circuit, c load(fout) = 5pf, unless otherwise noted. v alues are at t a = 25c unless otherwise noted. r set - m period - s 4 8 80 0 200 period vs r set 0 12 120 160 40 16 20 c set - pf period - s 8 12 60 20 period vs c set 4 80 100 40 16 20 c set - pf period - s 8 12 60 20 period vs c set 4 80 100 40 16 20 0 0 fout and pwmout transient response v dd = 1v, v cntrl = 0.03 5 x v dd , boost = v dd , c load = 22pf 5s/div fout fout transient response v dd = 1v, boost = v dd , c load = 47 pf 5s/div fout fout transient response v dd = 1.5v, boost = v dd , c load = 47 pf 5s/div fout boost = v dd boost = v dd pwmout boost = gnd
ts3002 ts3002ds r1p0 page 7 rtfds pin functions pin name function 1 fout fixed frequency output. a push - pull output stage with an output resistance of 160 ? the fout pin swings from gnd to v dd . for lowest power operation, capacitive loads should be minimized and resistive loads should be maximized. 2 boost boost input. a digital switch input, boost controls the propagation delay of the primary timing comparator in the ts3002s master oscillator subcircuit. connecting the boost pin to gnd sets the maxi mum programmable oscillator frequency to ~90 khz.connecting the boost pin to vdd reduces the comparators propagation delay and increases the maximum programmable master oscillators frequency to 290khz. 3 pwmout pulse - width modulated output. a push - pull output stage with an output resistance of 1 60 ? the pwmout pin is wired anti - phase with respect to fout and swings from gnd to v dd . for lowest power operation, capacitive loads should be minimized and resistive loads should be maximized. 4 cntrl pwmout enable and duty cycle control input. an analog input pin, the v cntrl pin voltage enables the ts3002s pwm engine and controls the duty cycle at pwmout from 12% (v cntrl = 0.03 x v dd ) to 90% (v cntrl = 0.27 x v dd ). enabling the pwm engine increases the ts3002s nominal operating supply current. to disable the ts3002s pwm engine cntrl shall be connected to v dd . 5 cset fout programming capacitor input. a 7.9 pf capacitor connected from this pin to gnd in junction with a 4.32m? resistor at the rset pin sets the ts3002s internal oscillators output period to ~ 40s (25khz). the maximum capacitance value is 22pf. 6 gnd ground C connect this pin to the systems analog ground plane. 7 rset fout programming resistor input. a 4.32m resistor connected from this pin to gnd sets the ts3002s internal oscillators output period to 40s (25khz). for optimal performance the composition of the rset resistor shall be consistent with tolerances of 1% or lower. the rset pin voltage is 0.3v at a 1v supply. 8 vdd power supply voltage input. while the ts3002 is fully specified at 1v, the supply voltage range is 0.9v v dd 1.8v. it is always considered good engineering practice to bypass the v dd pin with a 0.1f ceramic decoupling capacitor in close proximity to the ts3002. ep ----- exposed paddle is electrically connected to gnd .
ts3002 page 8 ts3002ds r1p0 rt f ds block diagram theory of operation the ts3002 is a user - programmable oscillator where the period of the square wave at its f out terminal is generated by an external resistor and capacitor pair. the output frequency is given by: fout ( khz ) = 1 t fout ( s ) 1 e k r set m? x c set ( pf ) where th e scalar k is approximately 1.1 9 . with an r set = 4.32m ? and a c set = 7.9 pf, the output frequency is approximately 25khz with a 50% duty cycle. as design aids, tables 1 lists ts3002s typical fout for various standard values for r set with c set = 7.9pf and table 2 lists typical fout for various standard values for c set with r set = 4.32m ?. the ts3002 also provides a separate pwm output signal at its pwmout terminal that is anti - phase with respect to fout. in addition, applying a voltage at table 1: fout vs r set , c set = 7.9pf r set (m ? set , r set = 4.32m ? set (pf) fout (khz) 5 39 7.9 25 10 19 15 13 20 10
ts3002 ts3002ds r1p0 page 9 rtfds the cntrl both enables the ts3002s internal pwm engine as well as adjusting the duty cycle from 12% to 90%. a dc control voltage equal to 0.03 x vdd applied to the cnt rl pin enabl es the pwm engine to set the duty cycle to 12%. a dc control voltage equal to 0.27 x vdd increases the duty cycle to 90% and connecting cntrl to vdd disables the pwm engine altogether . configured for nominal operation (pwm engine off, boost pin to gnd), th e supply current of the ts3002 is 1 a; enabling the pwm engine increases the ts3002 operating supply current as shown in the electrical specification table. the boost pin controls the propagation delay of the ts3002s internal comparators. when boost is co nnected to gnd the ts3002s maximum programmable operating frequency is ~90khz. connecting the boost pin to vdd reduces the propagation delay of the internal oscillators, thereby extending the high end maximum operating frequency to 290khz. applications information minimizing power consumption to keep the ts3002s power consumption low resistive loads at the fout and pwmout terminals increase dc power consumption and therefore should be as large as possible. capacitive loads at the fout and pwmout terminals increase the ts3002s transient power consumption and as well should be as small as possible. one challenge to minimizing the ts3002s transient power consumption is the probe capacitance of oscilloscopes and frequen cy counter instruments. mos t instruments exhibit an input capacitance of 15pf or more. unless buffered, the increase in transient load current can be as much as 4 00n a. to minimize capacitive loading, the technique shown in figure 1 can be used. in this circuit, the principle of series - connected capacitors can be used to reduce the effective capacitive load at the ts3002s fout and pwmout terminals. to determine the optimal value for c ext once the probe capacitance is known by simpl y solving for c ext using the following expression: c e t = 1 1 c load ( eff ) 1 c probe for example if the instruments input probe capacitance is 15pf and the desired effective load capacitance at either or both fout and pwmout terminals is to be 5pf, then the value of c ext should be 7.5pf. ts3002 start - up time as the ts3002 is powered up, it s fout terminal (and pwmout terminal, if enabled) is active once the applied vdd is higher than 0.9 volt. once the applied vdd is higher than 0.9 volt, the master oscillator achieves steady - state operation within 1.2 ms. current - and voltage - controlled oscillators the ts3002 can be configured into a current - controlled oscillator as shown in figure 2 . with a current source sourcing a current of 223na to 262na, fout can generate an output signal with a frequency range of 5.2khz to 90khz. in a similar manner, a voltage - controlled oscillator can be configured as shown in figure 3 . in this case, a voltage source sourcing a voltage of 29 0mv to 341mv can generate an fout output signal frequency range of 5.2khz to 90khz as well. it is recommended to use resi stor values with a 1% tolerance. figure 1 : using an external capacitor in series with probes reduces effective capac itive load. figure 2 : configuring the ts3002 into a current - controlled oscillator.
ts3002 page 10 ts3002ds r1p0 rt f ds using a potentiometer to trim the ts3002s output frequency by using a fixed resistor and a potentiometer, the output frequency of th e ts3002 can be trimmed as shown in figure 4 . by selecting a fixed resistor r1 with a tolerance of 0.1% and a potentiometer p1 with a 5% tolerance, the outp ut frequency can be trimmed to provide a 2 % trimming range. as shown in figure 5, r1 +p1 and c2 set the output frequency to 25.052khz when p1 = 0 and with p1 = 200k the resulting output frequency is 24.024khz. using standard resistors to increase fout resolution the ts3002 can be configured to provide a 0.1% resolution on the output freque ncy as shown in figure 5 . to do so, r1 can be set to approximately 10% of the value selected for r2. in addition, r2 and r1 should be chosen with a 0.1% and 1% tolerance, respectively. since r2 is 90% of the total resistance, it has the largest impact on the resolution of the output frequency. with r1 = 91k and r2 = 910k , the output fr equency is 90khz and with r1 = 400k and r2 = 4m the output frequency is 23khz . figure 4: using a fixed resistor and a potentiometer to trim the ts3002s figure 5 : setting the ts3002s output figure 3 : configuring the ts3002 into a voltage - controlled oscillator.
ts3002 touchstone semiconductor, inc. page 11 630 alder drive, m ilpitas, ca 95035 ts3002ds r1p0 +1 (408) 215 - 1220 ? www.touchstonesemi.com rtfds package outline drawing information furnished by touchstone semiconductor is believed to be accurate and reliable. however, touchstone semiconductor does not assume any responsibility for its use nor for any infringements of patents or other rights of third parties that may result from its use , and all information provided by touchstone semiconductor and its suppliers is provided on an as is basis, without warranty of any kin d . touchstone semiconductor reserves the right to change product specificati ons and product descriptions at any time without any advance notice. no license is granted by implication or otherwise under any patent or patent rights of touchstone semiconductor. touchstone semiconductor assumes no liability for applications assistance or customer product design. customers are responsible for their products and applications using touchstone semiconductor components. to minimize the risk associated with customer products and applicatio ns, customers should provide adequate design and opera ting safeguards. trademarks and registered trademarks are the property of their respective owners. bottom view side view note: all dimensions are in mm. compliant with jedec mo - 229 8 - pin tdfn22 package outline drawing (n .b., drawings are not to scale)

▲Up To Search▲

Price & Availability of TS302

	To Download TS302 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .