AS1520, as1521 10-bit, single-supply, low-power, 400/300ksps, 8-channel a/d converters product brief www.austriamicrosystems.co m revision 1.00 1 - 2 1 general description the AS1520/as1521 are low-power, 8/4-channel, 400/ 300ksps, 10-bit analog-to-digital (a/d) converters specif- ically designed to operate with single-supply devices. superior ac characteristics, very low power consump- tion, and highly-reliable packaging make these ultra- small devices perfect for battery-powered remote-sen- sor and data-acquisition devices. the successive-approximation register (sar), high- speed sampling, high-bandwidth track/hold circuitry, and multi-mode operation combine to make these devices highly-flexible and configurable. both devices require low supply current (2.8ma @ 400ksps, AS1520; 2.2ma @ 300ksps, as1521) and fea- ture a reduced-power mode and a power-down mode to lower power consumption at slower throughput rates. the devices operate from a single supply (+4.5 to +5.5v, AS1520; +2.7 to +3.6v, as1521). both devices contain an internal 2.5v reference, an integrated reference buffer, and feature support for an external reference (1v to v dd ). data accesses are made via the high-speed, 4-wire, spi, qspi-, and microwire-co mpatible serial interface. the devices are available in a 20-pin tssop package. figure 1. block diagram and pin assignments 2 key features single-supply operation: - +4.5 to +5.5v (AS1520) - +2.7 to +3.6v (as1521) sampling rate: - 400ksps (AS1520) - 300ksps (as1521) software-configurable analog input types: - 8-channel single-ended - 8-channel pseudo differential referenced to com - 4-channel pseudo differential - 4-channel fully differential software-configurable input range internal +2.5v reference low-current operation: - 2.8ma @ 400ksps (AS1520) - 2.2ma @ 300ksps (as1521) - 0.4ma in reduced-power mode - 0.5a in full power-down mode spi/qspi/microwire/tms320-compatible 20-pin tssop package 3 applications the devices are ideal for remote sensors, data-acquisi- tion and data-logging devices, pen-digitizers, process control, or any other space- limited a/d application with low power-consumption requirements. AS1520/ as1521 control logic output shift register 10-bit sar in out ref analog input +1.2v ref input shift register track/ hold 17k av 2.05 +2.50v 15 sstrb 17 csn 14 dout 20 v dd1 19 v dd2 13 gnd 18 sclk 16 din 1:8 ch0:ch7 9 com 12 refadj 11 ref 10 v dd3 AS1520/ as1521 1 ch0 2 ch1 3 ch2 4 ch3 5 ch4 6 ch5 7 ch6 8 ch7 9 com 10 v dd3 20 v dd1 19 v dd2 18 sclk 17 csn 16 din 15 sstrb 14 dout 13 gnd 12 refadj 11 ref
www.austriamicrosystems.co m revision 1.00 2 - 2 AS1520/as1521 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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