AS1534

a u s t ri a m i c r o s y s t e m s AS1534 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 characteristics, very low power-consumption, and highly-reliable packaging make the AS1534 perfect for batterypowered remote-sensor and data-acquisition devices. The successive-approximation register (SAR), highspeed sampling, high-bandwidth track/hold circuitry, and configurable inputs combine to make the AS1534 highlyflexible and configurable. Internal registers are used to control the AS1534 features, report on the status of the device, and hold the A/D conversion results. The device requires very low 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. Product Brief 1 2 - b i t , 8 - C h a n n e l , L o w - P o w e r, 2 0 0 k s ps A / D C o n v e r t e r 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 VDD Low-Power Operation: - 7.5mW (VDD = 3 V) - 1.5mW (Using Automatic Power-Down after Conversion; VDD = 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 control, or any other space-limited A/D application with low power-consumption requirements. Figure 1. Block Diagram 8:15 AIN0:AIN7 AVDD 5 AGND 3 REFIN/ REFOUT 6 CREF1 4 I/P MUX Track/ Hold AS1534 27 DVDD 28 DGND 39 CLKIN 150kΩ +2.5V REF Comparator 12-Bit SAR and A/D Conversion Control Buffer Charge Redistribution DAC 41 CONVSTN 40 BUSY 18 SLEEPN 7 CREF2 Parallel Interface Controller Register 43 RDN 44 CSN 42 WRN 2 WBN 29 DB8/HBEN DB0:DB15 www.austriamicrosystems.com Revision 1.03 1-2 AS1534 Product Brief a ustria m i c r o systems Copyrights Copyright © 1997-2006, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without 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 the warranty and patent indemnification 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 patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time 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 applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing 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 arising out of the furnishing, performance or use of the technical 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 and Representatives, please visit: http://www.austriamicrosystems.com austriamicrosystems www.austriamicrosystems.com Revision 1.03 – a leap ahead 2-2