note: for detailed information on purchasing options, contact your local allegro field applications engineer or sales representative. allegro microsystems, llc reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. the information included herein is believed to be accurate and reliable. however, allegro microsystems, llc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. recommended substitutions: continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 for existing customer transition, and for new customers or new appli- cations, contact the factory. date of status change: december 1, 2015 these parts are in production but have been determined to be not for new design. this classification indicates that sale of this device is currently restricted to existing customer applications. the device should not be purchased for new design applications because obsolescence in the near future is probable. samples are no longer available. not for new design
the a1301 and a1302 are continuous-time, ratiometric, linear hall-effect sensor ics. they are optimized to accurately provide a voltage output that is proportional to an applied magnetic field. these devices have a quiescent output voltage that is 50% of the supply voltage. two output sensitivity options are provided: 2.5 mv/g typical for the a1301, and 1.3 mv/g typical for the a1302. the hall-effect integrated circuit included in each device includes a hall circuit, a linear amplifier, and a cmos class a output structure. integrating the hall circuit and the amplifier on a single chip minimizes many of the problems normally associated with low voltage level analog signals. high precision in output levels is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process. these features make the a1301 and a1302 ideal for use in position sensing systems, for both linear target motion and rotational target motion. they are well-suited for industrial applications over extended temperature ranges, from C40c to 125c. two device package types are available: lh, a 3-pin sot23w type for surface mount, and ua, a 3-pin ultramini sip for through-hole mount. they are lead (pb) free (suffix, Ct ) with 100% matte tin plated leadframes. a1301-ds, rev. 21 ? low-noise output ? fast power -on time ? ratiometric rail-to-rail output ? 4.5 to 6.0 v operation ? solid-state reliability ? factory-programmed at end-of-line for optimum performance ? robust esd performance continuous-time ratiometric linear hall effect sensor ics functional block diagram a1301 and a1302 am p gnd vou t vc to all subcircuits c ou t o ffset tri m contro l gain v+ filte r c bypass not to scale packages: features and benefits description 3-pin sot23w (suffix lh) 3-pin sip (suffix ua)
2 selection guide part number packing* package ambient, t a sensitivity (typical) A1301EUA-T bulk, 500 pieces/bag sip C40oc to 85oc 2.5 mv/g a1301klhlt-t 7-in. reel, 3000 pieces/reel surface mount C40oc to 125oc a1301klhlx-t 13-in. reel, 10000 pieces/reel surface mount a1301kua-t bulk, 500 pieces/bag sip a1302elhlt-t 7-in. reel, 3000 pieces/reel surface mount C40oc to 85oc 1.3 mv/g a1302elhlx-t 13-in. reel, 10000 pieces/reel surface mount a1302klhlt-t 7-in. reel, 3000 pieces/reel surface mount C40oc to 125oc a1302klhlx-t 13-in. reel, 10000 pieces/reel surface mount a1302kua-t bulk, 500 pieces/bag sip *contact allegro? for additional packing options. absolute maximum ratings characteristic symbol notes rating units supply voltage v cc 8 v output voltage v out 8 v reverse supply voltage v rcc C0.1 v reverse output voltage v rout C0.1 v output sink current i out 10 ma operating ambient temperature t a range e C40 to 85 oc range k C40 to 125 oc maximum junction temperature t j (max) 165 oc storage temperature t stg C65 to 170 oc specifications terminal list symbol number description package lh package ua vcc 1 1 connects power supply to chip vout 2 3 output from circuit gnd 3 2 ground package lh sot23w pin-out diagram package ua, 3-pin sip pin-out diagram 2 3 1 2 1 3 continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
3 device characteristics over operating temperature range, t a , and v cc = 5 v, unless otherwise noted characteristic symbol test conditions min. typ. max. units electrical characteristics supply voltage v cc running, t j < 165c 4.5 C 6 v supply current i cc output open C C 11 ma output voltage v out(high) i source = C1 ma, sens = nominal 4.65 4.7 C v v out(low) i sink = 1 ma, sens = nominal C 0.2 0.25 v output bandwidth bw C 20 C khz power-on time t po v cc(min) to 0.95 v out; b = 1400 g; slew rate = 4.5 v/s to 4.5 v/100 ns C 3 5 s output resistance r out i sink 1 ma, i source C1 ma C 2 5 wide band output noise, rms v outn external output low pass filter 10 khz; sens = nominal C 150 C v ratiometry quiescent output voltage error with respect to ?v cc 1 v outq(v) t a = 25c C C 3.0 % magnetic sensitivity error with respect to ?v cc 2 sens (v) t a = 25c C C 3.0 % output linearity lin t a = 25c C C 2.5 % symmetry sym t a = 25c C C 3.0 % magnetic characteristics quiescent output voltage v outq b = 0 g; t a = 25c 2.4 2.5 2.6 v quiescent output voltage over operating temperature range v outq(t a ) b = 0 g 2.2 C 2.8 v magnetic sensitivity sens a1301; t a = 25c 2.0 2.5 3.0 mv/g a1302; t a = 25c 1.0 1.3 1.6 mv/g magnetic sensitivity over operating temperature range sens (t a ) a1301 1.8 C 3.2 mv/g a1302 0.85 C 1.75 mv/g 1 refer to equation (4) in ratiometric section on page 4. 2 refer to equation (5) in ratiometric section on page 4. continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
4 characteristic definitions quiescent output voltage in the quiescent state (no significant magnetic field: b = 0), the output, v outq , equals one half of the supply voltage, v cc , throughout the entire operating ranges of v cc and ambient temperature, t a . due to internal component tolerances and ther- mal considerations, there is a tolerance on the quiescent output voltage, ?v outq , which is a function of both ?v cc and ?t a . for purposes of specification, the quiescent output voltage as a func- tion of temperature, ?v outq(?t a ) , is defined as: where sens is in mv/g, and the result is the device equivalent accuracy , in gauss (g), applicable over the entire operating tem- perature range. sensitivity the presence of a south-polarity (+b) magnetic field, perpen- dicular to the branded face of the device package, increases the output voltage, v out , in proportion to the magnetic field applied, from v outq toward the v cc rail. conversely, the application of a north polarity (Cb) magnetic field, in the same orientation, proportionally decreases the output voltage from its quiescent value. this proportionality is specified as the magnetic sensitiv- ity of the device and is defined as: the stability of the device magnetic sensitivity as a function of ambient temperature, ? sens (?t a ) (%) is defined as: ratiometric the a1301 and a1302 feature a ratiometric output. this means that the quiescent voltage output, v outq , and the magnetic sen- sitivity, sens, are proportional to the supply voltage, v cc . the ratiometric change (%) in the quiescent voltage output is defined as: and the ratiometric change (%) in sensitivity is defined as: linearity and symmetry the on-chip output stage is designed to provide linear output at a supply voltage of 5 v . although the application of very high magnetic fields does not damage these devices, it does force their output into a nonlinear region. linearity in percent is mea- sured and defined as: and output symmetry as: ?v outq(? ) sens (25oc) v outq( ) v outq(25oc) ? = (1) 2b v out(?b) v out(+b) sens ? = ?sens (? ) sens ( ) sens (25oc) sens (25oc) ? = 100% (2) (3) v cc 5 v v outq(v cc ) v outq(5v) ?v outq(?v) = 100% (4) v cc 5 v = 100% ?sens (?v) sens (v cc ) sens (5v) (5) = 100% lin+ 2 (v out(+b?) ? v voutq ) ? v out(+b) v outq (6) = 100% lin? 2(v out(?b?) ? v outq ) ? v out(?b) v outq (7) ? = 100% sym v out(+b) v outq ? v out(?b) v outq (8) continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
5 typical characteristics (30 pieces, 3 fabrication lots) continued on the next page... 2.35 2.40 2.45 2.50 2.55 2.60 2.65 ?50 ?25 0 25 50 75 100 125 150 1.24 1.26 1.28 1.30 1.32 1.34 1.36 1.38 1.40 -50 -25 0 25 50 75 100 125 150 2.40 2.45 2.50 2.55 2.60 ?50 ?25 0 25 50 75 100 125 150 2.40 2.45 2.50 2.55 2.60 ?50 ?25 0 25 50 75 100 125 150 4.5 5.0 5.5 6.0 4.5 5.0 5.5 6.0 lh package ua package lh package ua package 1301 device sensitivity vs. ambient temperature 1302 device sensitivity vs. temperature temperature (c) temperature (c) 1301 device v outq vs. ambient temperature 1302 device v outq vs. ambient temperature 1301 device sensitivity vs. supply voltage 1302 device sensitivity vs. supply voltage supply voltage (v) supply voltage (v) temperature (c) temperature (c) sensitivity (mv/g) sens it ivity (mv/g) output voltage (v) output voltage (v) sensitivity (mv/g) sensitivity (mv/g) 1.5 2.0 2.5 3.0 3.5 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
6 1301 device v outq vs. supply voltage 4.5 5.0 5.5 6.0 1.5 2.0 2.5 3.0 3.5 4.5 5.0 5.5 6.0 4.5 5.0 5.5 6.0 4.5 5.0 5.5 6.0 99.0 99.1 99.2 99.3 99.4 99.5 99.6 99.7 99.8 99.9 100.0 4.5 5.0 5.5 6.0 99.5 99.6 99.7 99.8 99.9 100.0 100.1 100.2 100.3 100.4 100.5 4.5 5.0 5.5 6.0 supply voltage (v) lin? lin+ lin? lin+ 99.6 99.7 99.8 99.9 100.0 99.8 99.9 100.0 100.1 100.2 100.3 100.4 1302 device v outq vs. supply voltage 1301 device symmetry vs. supply voltage 1302 device symmetry vs. supply voltage 1301 device lin+ and lin? vs. supply voltage 1302 device lin+ and lin? vs. supply voltage output voltage (v) output voltage (v) linearity (%) linearity (%) symmetry (%) symmetry (%) supply voltage (v) supply voltage (v) supply voltage (v ) s upply voltage (v) supply voltage (v) 1.5 2.0 2.5 3.0 3.5 typical characteristics continued (30 pieces, 3 fabrication lots) continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
7 figure 1: package lh, 3-pin; (sot-23w) for reference only ? not for tooling use (reference dwg-2840) dimensions in millimeter s? not to scale dimensions exclusive of mold ?ash, gate burrs, and dambar protrusions exact case and lead con?guration at supplier discretion within limits shown a b c d c reference land pattern layout all pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and pcb layout tolerances active area depth, 0.28 mm hall elements, not to scale = last three digits of device part number n standard branding reference vi ew nnn branding scale and appearance at supplier discretion seating plane gauge plane pcb layout reference vi ew 0.55 ref 0.25 bsc 0.95 bsc 0.95 1.00 0.70 2.40 2 1 b a branded face 2.90 +0.10 ?0.20 44 8x 10 ref 0.180 +0.020 ?0.053 0.05 +0.10 ?0.05 0.25 min 1.91 +0.19 ?0.06 2.98 +0.12 ?0.08 1.00 0.13 0.40 0.10 d d d 1.49 0.96 3 customer outline drawings continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
8 figure 2: package ua, 3-pin sip for reference only ? not for tooling use (reference dwg-9065) dimensions in millimeters ? not to scale dimensions exclusive of mold ?ash, gate burrs, and dambar protrusions exact case and lead con?guration at supplier discretion within limits shown 23 1 1.27 nom 1.02 max 0.51 max 0.79 ref b a b c a d e d e e 2.04 1.44 e branding scale and appearance at supplier discretion hall element, not to scale mold ejector pin indent branded face 4.09 +0.08 ?0.05 0.41 +0.03 ?0.06 3.02 +0.08 ?0.05 0.43 +0.05 ?0.07 14.99 0.25 dambar removal protrusion (6x) gate and tie bar burr area active area depth, 0.50 mm ref nnn standard branding reference view = supplier emblem = last three digits of device part number n 2 x 45 c 45 3 x 10 1.52 0.05 1 continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
9 copyright ?2005-2015, allegro microsystems, llc allegro microsystems, llc reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegros products are not to be used in life support devices or systems, if a failure of an allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. the information included herein is believed to be accurate and reliable. however, allegro microsystems, llc assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. for the latest version of this document, visit our website: www.allegromicro.com revision history revision revision date description of revision 18 april 26, 2013 update ua package drawing 19 january 1, 2015 add lx option to selection guide 20 july 13, 2015 corrected lh package active area depth value 21 december 1, 2015 updated product status to not for new design continuous-time ratiometric linear hall effect sensor ics a1301 and a1302 allegro microsystems, llc 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com
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