voltage comparator the ft 1011 is a general purpose comparator with sig- nificantly better input characteristics than the ft111. although pin compatible with the ft111, it offers four times lower bias current, six times lower offset voltage and five times higher voltage gain. offset voltage drift, a previously unspecified parameter, is guaranteed at 15 m v/ c. additionally, the supply current is lower by a factor of two with no loss in speed. the ft1011 is several times faster than the ft111 when subjected to large overdrive conditions. it is also fully specified for dc parameters and response time when operating on a single 5v supply. these parametric improvements allow the ft1011 to be used in high accuracy ( 3 12-bit) systems without trimming. in a 12-bit a/d application, for instance, using a 2ma dac, the offset error introduced by the ft1011 is less than 0.5lsb. the ft1011 retains all the versatile features of the ft111, including single 3v to 18v supply operation, and a floating transistor output with 50ma source/sink capability. it can drive loads refer- enced to ground, negative supply or positive supply, and is specified up to 50v between v C and the collector output. a differential input voltage up to the full supply voltage is allowed, even with 18v supplies, enabling the inputs to be clamped to the supplies with simple diode clamps. n pin compatible with ft111 series devices n guaranteed max 0.5mv input offset voltage n guaranteed max 25na input bias current n guaranteed max 3na input offset current n guaranteed max 250ns response time n guaranteed min 200,000 voltage gain n 50ma output current source or sink n 30v differential input voltage n fully specified for single 5v operation n sar a/d converters n voltage-to-frequency converters n precision rc oscillator n peak detector n motor speed control n pulse generator n relay/lamp driver u u u overdrive (mv) 0.1 200 response time (ns) 250 300 350 400 1 10 100 150 100 50 0 450 500 falling output rising output ft1011/ft1011a voltage comparator features description applications response time vs overdrive
2 supply voltage (pin 8 to pin 4) .............................. 36v output to negative supply (pin 7 to pin 4) ft1011ac, ft 1011c .......................................... 40v ft1011ai, ft 1011i ............................................ 40v ft1011am, ft1011m .................................... 50v ground to negative supply (pin 1 to pin 4) ............ 30v differential input voltage ...................................... 36v voltage at strobe pin (pin 6 to pin 8) .................... 5v (note 1) w w w u order part number order part number ft1011ach ft1011ch ft1011amh ft1011mh FT1011ACN8 ft1011cn8 ft1011cs8 ft1011ais8 ft1011is8 t jmax = 150 c, q ja = 150 c/ w, q jc = 45 c/ w t jmax = 150 c, q ja = 130 c/ w(n8) t jmax = 150 c, q ja = 150 c/ w(s8) w u u input voltage (note 2) ....................... equal to supplies output short-circuit duration .............................. 10 sec operating temperature range (note 3) ft1011ac, ft 1011c ............................... 0 c to 70 c ft1011ai, ft 1011i ........................... C 40 c to 85 c ft1011am, ft1011m C55 c to 125 c storage temperature range ................. C 65 c to 150 c lead temperature (soldering, 10 sec).................. 300 c s8 part marking 1011 1011ai 1011i top view output v + gnd input balance/ strobe balance input v 8 7 6 5 3 2 1 4 h package 8-lead to-5 metal can + 1 2 3 4 8 7 6 5 top view gnd input input v v+ output balance s8 package 8-lead plastic so n8 package 8-lead pdip balance/ strobe + the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 15v, v cm = 0v, r s = 0 w , v 1 = C15v, output at pin 7 unless otherwise noted. symbol parameter conditions min typ max min typ max units v os input offset voltage (note 4) 0.3 0.5 0.6 1.5 mv l 1.0 3.0 mv *input offset voltage r s 50k (note 5) 0.75 2.0 mv l 1.50 3.0 mv i os *input offset current (note 5) 0.2 3 0.2 4 na l 56 n a i b input bias current (note 4) 15 25 20 50 na *input bias current (note 5) 20 35 25 65 na l 50 80 na ft 1011ac/ai/am ft 1011c/i/m * indicates parameters which are guaranteed for all supply voltages, including a single 5v supply. see note 5. j8 package 8-lead cerdip t jmax = 150 c, q ja = 100 c/ w(j8) ft1011acj8 ft1011cj8 ft1011amj8 ft1011mj8 order part number absolute maximum rating package/order information electrical characteristics ft1011/ft1011a voltage comparator
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