AS1523

AS1522, AS1523 1 0 - B i t , S i n g l e - S u p p l y, L o w - P o w e r, 4 0 0 / 3 0 0 k s ps , 4-Channel A/D Converters Product Brief 1 General Description The AS1522/AS1523 are low-power, 4/2-channel, 400/ 300ksps, 10-bit analog-to-digital (A/D) converters specifically designed to operate with single-supply devices. Superior AC characteristics, very low power consumption, and highly-reliable packaging make these ultrasmall devices perfect for battery-powered remote-sensor and data-acquisition devices. The successive-approximation register (SAR), highspeed 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, AS1522; 2.2mA @ 300ksps, AS1523) and feature 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, AS1522; +2.7 to +3.6V, AS1523). Both devices contain an internal 2.5V reference, an integrated reference buffer, and feature support for an external reference (1V to VDD). Data accesses are made via the high-speed, 4-wire, SPI, QSPI-, and Microwire-compatible serial interface. The devices are available in a 16-pin TSSOP package. 2 Key Features ! Single-Supply Operation: - +4.5 to +5.5V (AS1522) - +2.7 to +3.6V (AS1523) Sampling Rate: - 400ksps (AS1522) - 300ksps (AS1523) Software-Configurable Analog Input Types: - 4-Channel Single-Ended - 4-Channel Pseudo Differential Referenced to COM - 2-Channel Pseudo Differential - 2-Channel Fully Differential Software-Configurable Input Range Internal +2.5V Reference Low-Current Operation: - 2.8mA @ 400ksps (AS1522) - 2.2mA @ 300ksps (AS1523) - 0.4mA in Reduced-Power Mode - 0.5µA in Full Power-Down Mode SPI/QSPI/Microwire/TMS320-Compatible 16-pin TSSOP Package ! ! ! ! ! ! ! 3 Applications The devices are 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. 11 Figure 1. Block Diagram and Pin Assignments 14 CSN 15 SCLK 13 DIN Input Shift Register Output Shift Register DOUT 12 SSTRB VDD1 1 CH0 2 CH1 3 CH2 4 16 VDD2 15 SCLK 14 CSN AS1522/ AS1523 12-Bit SAR 7 VDD3 16 VDD2 Control Logic 2:5 CH0:CH3 6 COM +1.2V REF Analog Input Track/ Hold 17kΩ Av ≈ 2.05 +2.50V IN CH3 5 COM 6 VDD3 7 REF 8 AS1522/ AS1523 13 DIN 12 SSTR 11 DOUT 10 GND 9 REFADJ OUT REF 1 VDD1 9 REFADJ 8 REF 10 GND www.austriamicrosystems.com Revision 1.00 1-2 AS1522/AS1523 Product Brief Copyrights Copyright © 1997-2007, 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. 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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/contact www.austriamicrosystems.com Revision 1.00 2-2