AS1532, AS1533 Product Brief 1 2 - 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 1 General Description 2 Key Features The AS1532/AS1533 are low-power, 4/2-channel, 400/ 300ksps, 12-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, AS1532; 2.2mA @ 300ksps, AS1533) 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, AS1532; +2.7 to +3.6V, AS1533). 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. 14 AS1532/ AS1533 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 (AS1532) - 2.2mA @ 300ksps (AS1533) - 0.4mA in Reduced-Power Mode - 0.5µA in Full Power-Down Mode ! SPI/QSPI/Microwire/TMS320-Compatible ! 16-pin TSSOP Package 3 Applications DOUT 12 VDD3 Track/ Hold IN 16 VDD2 OUT REF 1 +1.2V REF VDD1 1 16 VDD2 CH0 2 15 SCLK CH1 3 CH2 4 Analog Input COM 9 ! 7 12-Bit SAR 2:5 REFADJ 8 Sampling Rate: - 400ksps (AS1532) - 300ksps (AS1533) SSTRB Input Shift Register Control Logic CH0:CH3 6 ! 11 Output Shift Register CSN 15 DIN Single-Supply Operation: - +4.5 to +5.5V (AS1532) - +2.7 to +3.6V (AS1533) 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. Figure 1. Block Diagram and Pin Assignments SCLK 13 ! 17kΩ VDD1 CH3 5 14 CSN AS1532/ AS1533 13 DIN 12 SSTR COM 6 11 DOUT VDD3 7 10 GND REF 8 9 REFADJ Av ≈ 2.05 +2.50V REF www.austriamicrosystems.com 10 GND Revision 1.00 1-2 AS1532/AS1533 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. 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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