12/20/2006 www.clare.com 1 features ? 3v to 60v operating voltage range ? integrated 10-bit adc ? 3-wire serial interface ? microcontroller compatible ? low power ? minimum external components ? tsot-23 rohs compliant package applications ? lighting management ? current shunt measurement ? remote sensing ? battery monitoring ? microprocessor controlled power management description the mx884 targets power management applications where high noise immunity and low cost are primary requirements. its integrated 10-bit adc provides high resolution, making it ideal for current monitoring systems. the mx884 enables digital power management, in which a microcontroller can readily monitor the current in a system, and perform other control functions in power systems and motion control products. the mx884 converts a small voltage developed across an external current-sense resistor into a 10-bit digital output. it features a wide common mode input supply voltage range of 3v to 60v, and easily interfaces to most microcontrollers. the design is simple yet cost-effective, requiring very few external components, which makes it especially suitable for high volume applications. ordering information functional block diagram part description MX884HTTR tsot23 6-lead, tape & reel (3,000/reel) 12 bit adc - + mx 88 4 in gnd r s load i load sdo sck cs rohs 2002/95/ec e 3 pb mx884 high-side current monitor with 10-bit serial digital output
mx884 12/20/2006 www.clare.com 2 1. specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 package pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 pin description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.4 dc electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. manufacturing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 moisture sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 esd sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 mechanical dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
mx884 12/20/2006 www.clare.com 3 1 specifications 1.1 package pinout 1.2 pin description 1.3 absolute maximum ratings absolute maximum electrical ratings are at 25c absolute maximum ratings are stress ratings. stresses in excess of these ratings can cause permanent damage to the device. functional operation of the device at conditions beyond those indicated in the operational sections of this data sheet is not implied. 1.4 dc electrical characteristics v i n =5v, t a =25c. 1 2 3 6 5 4 pin# name description 1sck serial clock 2gnd ground 3load load-side connection to the external sense resistor 4in positive supply terminal and power connection for the external sense resistor 5cs chip select (active low) 6sdo serial data output (open drain) parameter symbol min max units in supply voltage - - 70 v load - - 70 v sck, cs input voltage - - 6 v sdo open drain pull-up voltage - - 6 v operating temperature range t a -40 +85 c storage temperature range t stg -55 +150 c parameter conditions minimum typical maximum units operating voltage range (v in ) - 3-60 v supply current i load =0 -0.25- ma average a/d reading 10mv sense voltage 90 100 110 lsb average a/d reading 100mv sense voltage 992 1000 1008 lsb output noise c s =10nf parallel, r s =10 - 1.5 - rms lsb sck pulse period - 5- - s sck pulse width high or low 200 - - ns cs pulse period - 100 - - s cs falling to first sck rising - 200 - - ns last sck falling to cs rising - 100 - - ns sck falling to sdo valid sdo falling - - 80 ns sdo rising depends on sdo r, c -
mx884 4 www.clare.com 12/20/2006 2 functional description the mx884 converts a small voltage developed across an external sense re sistor (rs) to a 10-bit digital output. pin i n connects to the 3v to 60v power input. the external current sense resistor connects between pins i n and load. the nominal a/d range is 100 mv v(i n )-v(load) across rs. the a/d least significant bit typicall y equals 0.1 mv across r s . inputs cs and sck are ttl-level compatible, 5.5v maximum input voltage. inputs can be driven from cmos microcontrollers operating at supply voltages of 2.4 to 5.5v. serial data output pin sdo is configured as open drain, maximum 5.5v external pull-up. sck is used internally to clock the successive approximation register of the a/d. figure 1. serial timing diagram figure 2. typical application circuit cs sck sdo d9 d 8 d7 d6 d5 d4 d3 d2 d1 d0 internal s/h po w er s u pply 0.1 10nf +3 v microcontroller po w er ret u rn mx 88 4 gnd sdo cs sck load in 5 1 6 2 4 3 load
mx884 12/20/2006 www.clare.com 5 3 manufacturing information 3.1 moisture sensitivity all plastic encapsulated se miconductor packages are susceptible to moisture ingression. clare classified all of its plastic encapsulated device s for moisture sensitivity according to the latest version of the joint industry standard, ipc/jedec j-std-020 , in force at the time of product evaluation. we test all of our products to the maximum conditions set forth in the standard, and guarantee proper operation of our devices when handled according to the limitations and informat ion in that standard as well as to any limitations set forth in the information or standards referenced below. failure to adhere to the warnings or limitations as establ ished by the listed specificati ons could result in reduced product performance, reduction of operable life, and/or reduction of overall reliability. this product carries a moisture sensitivity level (msl) rating as shown below, and should be handled according to the requirements of the latest version of the joint industry standard ipc/jedec j-std-033 . 3.2 esd sensitivity this product is esd sensitive , and should be handled according to the industry standard jesd-625 . device moisture sensitivity level (msl) rating MX884HTTR msl 1 rohs 2002/95/ec e 3 pb
mx884 6 www.clare.com 12/20/2006 3.3 mechanical dimensions 3.3.1 tsot23-6 package 3.3.2 tape & reel dimensions dimensions mm min / mm max (inches min / inches max) recommended pcb land pattern 2.60 / 3.00 (0.102 / 0.11 8 ) 0.10 / 0.25 (0.004 / 0.010) 0.37 mi n (0.015 mi n ) 2. 8 0 / 3.00 (0.110 / 0.11 8 ) 0.75 / 0.90 (0.030 / 0.035) 0.95 bsc (0.037 bsc) 1.50 / 1.70 (0.059 / 0.067) 0.35 / 0.51 (0.014 / 0.020) 0.00 / 0.10 (0.000 / 0.004) 0.70 / 0. 8 0 (0.02 8 / 0.031) 1.90 bsc (0.095 bsc) 0.60 ref (0.0236 ref) gauge pla n e 0.25 bsc (0.009 8 bsc) 0.10 mi n (0.004 mi n ) 5o n om 7o n om 0o / 8 o 1 6 1.05 (0.041) 2.70 (0.106) 0.95 (0.037) 0.60 (0.024) n otes: (unless other w ise specified) 1. dimension ?d? does not incl u de mold flash, protr u sions, or gate bu rrs. mold flash, protr u sions, and gate bu rrs shall not exceed 0.10mm (0.004 inches) per side. 2. dimension ?e? does not incl u de inter-lead flash or protr u sions. inter-lead flash and protr u sions shall not exceed 0.15mm (0.006 inches) per side. 3. package top may b e smaller than package b ottom. dimensions ?d? and ?e1? are determined at the o u termost extreme of the plastic b ody excl u ding mold flash, tie b ar bu rrs, gate bu rrs, and interlead flash, bu t incl u ding any mismatch b et w een top and b ottom of the plastic b ody. notes: 1. 10 sprocket hole pitch cumulative tolerance 0.2 2. camber not to exceed 1mm in 100mm 3. pocket position relative to sprocket hole measured as true position of pocket, not pocket hole 4. (s.r. ohm/sq.) means surface electric resistivity of the carrier tape. dimensions mm (inches) em b ossment em b ossed carrier top co v er tape thickness 0.066 max. (0.003 max.) 17 8 dia. (7.01 dia.) k 0 =1.956 max. (0.077 max.) p=4.0 0.1 (0.157 0.004) a o =3.2 0.1 (0.126 0.004) b o =3.2 0.1 (0.126 0.004) w = 8 .0 0.2 (0.315 0.00 8 ) p=4.0 0.1 (0.157 0.004) 2.0 0.05 (0.079 0.002) 1.75 0.1 (0.069 0.004) ?1.5 0.1 (0.059 0.004) 3.5 0.05 (0.13 8 0.002) ?1.1 0.1 (0.043 0.004)
mx884 12/20/2006 www.clare.com 7 for additional information please vi sit our website at: www.clare.com clare, inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publica tion and reserves the right to make changes to specifications and product descriptions at any time without notice. n either circuit patent licenses nor indemnity are expressed or implied. except as set forth in clare?s standard terms and condit ions of sale, clare, inc. assumes no liability whatsoever, and disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right. the products described in this document are not designed, intended, authorized or warranted for use as components in systems in tended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of clare?s product may result in direct physical harm, i njury, or death to a person or severe property or environmental damage. clare, inc. reserves the right to discontinue or ma ke changes to its products at any time without notice. specification: ds-mx884 ?copyright 2010, clare, inc. all rights reserved. printed in usa. 11/2/2010
|
