lnd ina333a/b /c ina333 footprint compatible instrumentation amplifiers (ina) use 5 0% less current ? linear dimensions semiconductor inc. ? 22620 ricardo rd, cupertino ca 95014 usa ? tel 312.321.1810 ? fax 312.321.1830 ? www.lineardimensions.com ? advance datasheet d general description ? fully d ifferential ac only (lnd ? instrumentation amplifier ? single ended (LNDINA333A) ? fully differential (lndina333b) ? fully differential ac only (lndina333c) ? + 2.7v to +5.5v input range ? 25a typ current consumption (ina333, 50a) ? 35a typ current (lndina333c) ? 350khz typical bandwidth ? 25v typical input offset voltage ? 100db typical cmrr ? 100nv/hz typical input referred noise ? rfi filtered inputs ? external resis tor or programmable gain ? minimum gain setting 100v/v ? input range: gnd - 0.1v to vdd+0.1v ? output range: gnd +0.05v to vdd - 0.05v ? low drift: 2v/c typical ? +/ - 5 pa typical input bias current ? 10 ma short circuit current ? 8kv esd protection (vs. 4kv for ina333) ? temperature range: - 40c to 125c ? footprint compatible with epad dfn - 8 features the LNDINA333A/b/c are precision instrumentation amplifiers designed to be footprint compatible with the ti ina333. although the lndina333 are footprint compatible they offer similar performance to the ina333 with a 30% reduction in power consumption (25ua typical and 30 ua maxi mum vs. 50ua typical and 80ua maximum for the ina333). the LNDINA333A has a single ended output replicating the ina333a while the outputs of lndina333b/c are fully differential. if an rg resistor is connected between the rg pins then the differential curr ent will be set by the external resistor. on the other hand if the rg inputs remain high impedance t hen a pulse o n rg/dig - will cause an internal resistor to decrement in value, while a pulse on rg/dig+ will cause the internal resistor to increment in valu e. default is half scale. the lndina333c is an ac only instrumentation amplifier which has a 5hz 3db high pass response. integrators are connected between the output and feedback nodes to form a high pass response as shown in the block diagram below. the LNDINA333A/b/c features 8kv hbm esd protection compared to 4kv with the ina333. the inputs are also rfi filtered to reduce emi susceptibility. the LNDINA333A/b/c is available in a epad dfn - 8 package which has a 65 c/w thermal resistance. applications ? portable h eart rate e quipment ? portable fitness & wellness p roducts ? non - critical d iagnostics ? vibration measurement equipment ? ins t rumentation ? bridge amplifiers ? pressure sensors ? weigh scales ? sensor amplifiers package figure 1 C lndina333c equivalent block diagram block diagram r g / d i g + i n p i n m r g / d i g - v d d v o u t / v o p r e f / v o m g n d e p a d rg / dig + inm inp rg / dig - vdd vout / vop ref / vom gnd e p a d
? linear dimensions semiconductor inc. ? 22620 ricardo rd, cupertino ca 95014 usa ? tel 312.321.1810 ? fax 312.321.1830 ? www.lineardimensions.com ? LNDINA333A, lndina333b, lndina333c input offset voltage -100 25 100 vs te m perature 2 common-mode voltage range (v-)+0.1 (v+)-0.1 v common-mode rejection dc to 60hz, vcm=(v-)+0.1v to (v+)-0.1v gain = 100 90 100 db gain = 1000 90 100 db input bias current input bias current +-5 +-50 input offset current +-5 +-50 input noise input voltage noise g=100 f = 100hz 100 f = 1khz 50 f = 0.1hz to 10hz input current noise f = 1khz 1 gain gain equation range of gain 100 2000 gain error g = 100 +-0.1 +-0.25 % g = 1000 +-0.25 +-0.5 % gain vs tem pe rature +-15 +-50 g = 250 to 2000 10 ppm output output voltage sw ing from rail 50 capacitive load drive 200 short-circuit current +-10 frequency response bandw idth, -3db g = 100 3.5 khz g = 1000 350 hz slew rate 0.03 settling time to 0.01% 500 reference output vref 0.88 0.9 0.92 v power supply voltage range 2.7 5.5 v quiescent current 25 27 vs te m perature 30 lndina333b common-mode output voltage 0.88 0.9 0.92 v lndina333c quiescent current 35 38 vs te m perature 42 common-mode output voltage 0.88 0.9 0.92 v middle-point common mode point v low -pass filter cutoff frequency 2.5 5 hz v v/ c pa pa nv/ vpp ? o < (v+) - 0.1v ppm / c gain nonlinearity mv pf ma v/s s a a a a s /2
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