[AK9255 a /56 a ] rev 0.5 201 7 / 09 - 1 - 1. g eneral d escription the AK9255 a /56 a are 16/14 - bit 0.54 msps zds - ns ( * 1 ) a/d converter s . they are zds a/d converters with noise suppression function and c apable of improving the system accuracy. the ak 9255 a /56 a are available in an small package, saving space on the printing board. notes: * 1 . zds - ns : zero l atency delta sigma with noise suppression function a zds - ns a/d converter realizes ultrafast response of sar while maintaining h igh accuracy conversion like a delta - si gma converter, based on akms accumulated experience and know - how in analog - digital lsi technology. a zds - ns a/d converter has smaller input capacitance than sar s , reducing the buffer load of the input stage of the i c . furthermore, the oversampling process is executed inside of the ic, and the averaging process is carried out with a built - in digital filter. therefore, analog input signal noise can be suppressed, contributing to improving noise characteristics of the s ystem. it also contributes to high - speed processing of a system that needs a noise averaging . a pplication ? motor control: position measurement using sincos encoders ? three - phase power controls ? programmable logic controllers ? power quality measurement ? industrial automation 2. f eatures ? 2ch simultaneous sampling zds - ns a/d converter ? resolution , samp ling rate : 16 - bit, 0.54 msps AK9255 a 14 - bit, 0.62 msps ak9256 a ? differential input / pseudo differential input ? noise suppression function ? 1 6 bit no missing code, inl: 3 .0 lsb(typ .) AK9255 a 14bit no missing code, inl: 1.0 lsb(typ.) ak9256 a ? s/n 86 dbfs(typ.) AK9255 a (ns setting1) 90 dbfs(typ.) AK9255 a (ns setting4) 82 dbfs(typ.) ak9256 a (ns setting1) 85 dbfs(typ.) ak9256 a (ns setting4) ? power dissipa tion: vdd : 2 6 ma (typ.) drvdd : 1 ma (typ.) (fs= 0.54 msps, vdd= 3 . 3 v, drvdd= 3.3 v , ns setting1 ) ? power supply : vdd : 3.0 ~ 3 . 6 v drvdd : 3.0 ~ 3 . 6 v ? operating temperature range : - 40 ~ 1 0 5 oc ? package : small 16 - pin qfn (3mm x 3mm, 0.5mm pitch) ak 9255 a /56 a = preliminary = dual 1 6/14 - bit 0.54 msps zds - ns a/ d converter
[AK9255 a /56 a ] rev 0.5 201 7 / 09 - 2 - device comparison table the AK9255 and the ak9256 are available as a line - up of another output interface option. please use the ak9225/56 for a n application that does not need zero latency and needs faster sampling speed . p roduct resolution no missin g code snr (typ.) speed interface AK9255 16 - bit 16 - bit 86 dbfs 1.00 msps 1 latency AK9255a 0.54 msps 0 latency ak9256 14 - bit 14 - bit 82 dbfs 1.17 msps 1 latency ak9256a 0.63 msps 0 latency AK9255/56 sdox (output) AK9255/56 csn (input) AK9255/56 sclk (input) v1 v0 v2 v1 v3 v2 v4 v3 AK9255a/56a sdox (output) a k9255a/56a csn (input) AK9255a/56a sclk (input) v1 v1 v2 v2
[AK9255 a /56 a ] rev 0.5 201 7 / 09 - 3 - 3. block diagram
[AK9255 a /56 a ] rev 0.5 201 7 / 09 - 4 - 4. ?? thank you for your access to akm product s information. more detail product information is available, please contact our sales office or authorized distributors. alternatively, please contact us from the following url. < http://www.akm.com/akm/en/support/inquires > 5. important notice 0. asahi kasei microdevices corporation (akm) reserves the right to make changes to the information contained in this document without notice. when you cons ider any use or application of akm product stipulated in this document ( product ) , please make inquiries the sales office of akm or authorized distributor s as to current status of the products. 1. all information included in this document are provided onl y to illustrate the operation and application examples of akm products . akm neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual pr operty rights or any other rights of akm or any third party with respect to the information in this document. you are fully responsible for use of such information contained in this document in your product design or applications . akm assumes no liability for any losses incurred by you or third parties arising from the use of such information in your product design or applications. 2. the product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of q uality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public impact , including but not limited to, equipment used in nuclear facilities, equipment used in the aero space industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electr ic power, and equipment used in finance - related fields. do not use product for the above use unless specifically agreed by akm in writing . 3. though akm works continually to improve the products quality and reliability, you are responsible for complying w ith safety standards and for providing adequate designs and safeguards for your hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of the product could cause loss of human life, bodily injury or damage to property, including data loss or corruption. 4. do not use or otherwise make available the product or related technology or any information contained in this document for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction weapons). when exporting the p roducts or related technology or any information contained in this document, you should comply wit h the applicable export control laws and regulations and follow the procedures required by such laws and regulations. the p roducts and related technology may not be used for or incorporated into any products or systems whose manufacture, use, or sale is pr ohibited under any applicable domestic or foreign laws or regulations. 5. please contact akm sales representative for details as to environmental matters such as the rohs compatibility of the product. please use the product in compliance with all applicabl e laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the eu rohs directive. akm assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulati ons. 6. resale of the product with provisions different from the statement and/or technical features set forth in this document shall immediately void any warranty granted by akm for the product and shall not create or extend in any manner whatsoever , any liability of akm. 7. this document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of akm .
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