AS1538 8-channel, 12-bit i2c analog-to-digital converter product brief www.austriamicrosystems.co m revision 1.01 1 - 2 1 general description the AS1538 is a single-supply, low-power, 12-bit data acquisition device t hat features a serial i2c interface and an 8-channel multiplexer. the analog-to-digital (a/d) converter features a sample- and-hold amplifier an internal asynchronous clock and an internal reference. the combination of an i 2 c serial, 2-wire interface and micropower consumption ma kes the AS1538 ideal for applications requiring the a/d converter to be close to the input source in remote locations and for applications requiring isolation. the device is available in a tssop-16 package. figure 1. block diagram 2 key features single supply: 2.7 to 5.25v 8-channel multiplexer sampling rate: 50ksps no missing codes internal reference: 2.5v high speed i 2 c interface at 3.4mhz <1.5a full shutdown current tssop-16 package 3 applications the device is ideal for voltage-supply monitoring, iso- lated data acquisition, transducer interfaces, battery- operated systems, remo te data acquisition or any other analog-to-digital conversion application. 12 a0 14 scl 1 ch0 15 sda AS1538 8-channel mux 2 ch1 3 ch2 4 ch3 5 ch4 6 ch5 7 ch6 8 ch7 10 ref in/out sample/ hold amp successive approximation register cdac comparator serial interface 13 a1 internal 2.5v reference buffer 9 gnd 11 com
www.austriamicrosystems.co m revision 1.01 2 - 2 AS1538 product brief copyrights copyright ? 1997-200 7, 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/contact
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