AS1534 12-bit, 8-channel, low-power, 200ksps a/d converter austria micro systems product brief www.austriamicrosystems.co m revision 1.03 1 - 2 1 general description the AS1534 is a low-power, 8-channel, 200ksps, 12-bit analog-to-digital (a/d) converter specifically designed to operate with single-supply devices. superior ac charac- teristics, very low power-consumption, and highly-reli- able packaging make the AS1534 perfect for battery- powered remote-sensor and data-acquisition devices. the successive-approximation register (sar), high- speed sampling, high-bandwidth track/hold circuitry, and configurable inputs combine to make the AS1534 highly- flexible and configurable. internal registers are used to control the AS1534 fea- tures, report on the status of the device, and hold the a/d conversion results. the device requires very lo w supply-current at the 200ksps max sampling speed, and features flexible power-down modes to reduce power consumption at slower throughput rate. the AS1534 operates from a single +3 to +3.6v supply and contains an internal 2.5v reference and integrated reference buffer. the device also supports an external reference. data accesses are made via the fast 8-/16-bit parallel interface in support of a wide range of microprocessors. the AS1534 is available in a 44-pin pqfp package. figure 1. block diagram 2 key features sampling rate: 200ksps 8- and 16-bit parallel interface analog input types: - 8-channel single-ended - 4-channel pseudo-differential - 4-channel fully-differential software-configurable unipolar or bipolar inputs internal +2.5v reference external reference: 1.2v to v dd low-power operation: - 7.5mw (v dd = 3 v) - 1.5mw (using automati c power-down after con- version; v dd = 3 v, 10ksps) single-supply operation: +3 to +3.6v 44-pin pqfp package 3 applications the device is ideal for remote sensors, data-acquisition and data-logging devices, pen-digitizers, process con- trol, or any other space-limited a/d application with low power-consumption requirements. 8:15 ain0:ain7 AS1534 12-bit sar and a/d conversion control +2.5v ref i/p mux refin/ refout db0:db15 40 busy 41 convstn 39 clkin 28 dgnd 27 dv dd 18 sleepn track/ hold comp- arator 3 buffer 7 c ref2 parallel interface controller register 6 c ref1 charge redistribution dac 43 rdn 44 csn 2 wbn 42 wrn 5 agnd 4 av dd 29 db8/hben 150k ?
www.austriamicrosystems.co m revision 1.03 2 - 2 AS1534 austria micro systems product brief copyrights copyright ? 1997-200 6, austriamicrosystems ag, schloss premstaett en, 8141 unterpremstae tten, austria-europe. trademarks registered ?. all rights reserved. the materi al herein may not be reprodu ced, adapted, merged, trans- lated, stored, or used witho ut the prior written consent of the copyright owner. all products and companies mentioned are trademarks or registered trademarks of their respective companies. disclaimer devices sold by austriamicrosystems ag are covered by t he warranty and patent indemni fication provisions appearing in its term of sale. austriamicrosystems ag makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from pa tent infringement. austriami- crosystems ag reserves the right to chang e specifications and prices at any ti me and without notice . therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems ag for current information. this product is intended for use in normal commercial a pplications. applications requiring extended temperature range, unusual environmental requirements, or high reliability app lications, such as military, medical life-support or life- sustaining equipment are specifically not recommended wit hout additional processing by austriamicrosystems ag for each application. for shipments of less than 100 parts the m anufacturing flow might show deviations from the standard production flow, such as test flow or test location. the information furnished here by austriamicrosystems ag is believed to be correct and accurate. however, austriamicrosystems ag shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or ar ising out of the furnishing, performance or use of the tech- nical data herein. no obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems ag rendering of technical or other services. contact information headquarters austriamicrosystems ag a-8141 schloss premstaetten, austria tel: +43 (0) 3136 500 0 fax: +43 (0) 3136 525 01 for sales offices, distributors a nd representatives, please visit: http://www.austriamicrosystems.com austria micro systems ? a leap ahead
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