AS1524/AS1525
Part | Datasheet |
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AS1524-TD_EK_ST (pdf) |
Related Parts | Information |
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AS1525-TD_EK_ST |
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AS1525-BTDR |
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AS1524-BTDT |
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AS1524-BTDR |
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AS1525-BTDT |
PDF Datasheet Preview |
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Datasheet AS1524/AS1525 150ksps, 12-Bit, 1-Channel Pseudo/True-Differential and 2-Channel Single-Ended ADCs 1 General Description 2 Key Features The AS1524/AS1525 are low-power, 12-bit analog-todigital converters ADCs designed to operate with a single +2.7V to +5.25V supply. Excellent dynamic performance, low power consumption, and simplicity make these devices perfect for portable battery-powered dataacquisition applications. The devices are available as the standard products listed in Table Table Standard Products Model Input Type Input Voltage AS1524 1-Channel, Pseudo / True-Differential 0 to VREF / -VREF/2 to VREF/2 AS1525 2-Channel, SingleEnded 0 to VREF ! Single-Supply Operation +2.7V to +5.25V ! Automatic Shutdown Between Conversions ! Low Power Consumption - 350µA 150ksps - 245µA 100ksps - 24µA 10ksps - 2.5µA 1ksps - 200nA in Automatic Shutdown Mode ! True-Differential Track/Hold, 150kHz Sampling Rate Software-Configurable Unipolar/Bipolar Conversion AS1524 The devices feature a successive-approximation register SAR , automatic shutdown, fast wakeup 1.4µs , and low-power consumption at the maximum sampling rate of 150ksps. Automatic shutdown 0.2µA between conversions results in reduced power consumption at slower throughput rates . Data access are made via an external clock through the SPI-/QSPI-/MICROWIRE-compatible 3-wire high-speed serial interface. The AS1525/AS1524 are available in a 8-pin TDFN 3x3mm package. Figure AS1524/AS1525 - Block Diagram ! Input Common Mode Range from GND to VDD ! 3-Wire SPI-/QSPI-/MICROWIRE-Compatible Serial Interface ! Internal Conversion Clock ! 8-pin TDFN 3x3mm Package 3 Applications The devices are ideal for remote sensors, data-acquisition, data logging devices, lab instruments, or for any other space-limited A/D devices with low power consumption and single-supply requirements. 1 VDD 7 CNVST 8 SCLK 2 AIN1/AIN+ 2 AIN2/AIN- 4 REF AS1524/AS1525 Input Shift Register Control Logic Track/ Hold SPI and Microwire Interface 15 QSPI Interface PIC16 and SSP Module and PIC17 Interface Layout and Grounding Considerations 19 10 Package Drawings and Markings 20 11 Ordering Information 21 2 - 22 AS1524/AS1525 Datasheet - Pinout 4 Pinout Pin Assignment Figure Pin Assignments Top View VDD 1 AIN1/AIN+ 2 AIN2/AIN- 3 GND 4 AS1524/ AS1525 8 SCLK 7 DOUT 6 CNVST 5 REF Pin Description Table Pin Description Pin Number Pin Name AIN1/AIN+ AIN2/AIN- CNVST DOUT SCLK Positive Supply Voltage. +2.7V to +5.25V. Note Bypass with a 0.1µF capacitor to GND. Analog Input Channel 1 AS1525 or Positive Analog Input AS1524 Analog Input Channel 2 AS1525 or Negative Analog Input AS1524 Ground External Reference Voltage Input. Sets the analog voltage range. Note Bypass with a 4.7µF capacitor to GND. Conversion Start. A rising edge powers up the device and puts the track/ hold circuitry in track mode. At the falling edge of this pin, the device enters hold mode and begins a conversion. Note This pin also selects the input channel AS1525 or input polarity AS1524 . Serial Data Output. This pin transitions the falling edge of SCLK and goes low at the start of a conversion and delivers the MSB at the completion of a conversion. Note This pin goes high impedance once data has been fully clocked out. Serial Clock Input. Clocks out data at DOUT with the MSB first. 3 - 22 AS1524/AS1525 Datasheet - Absolute Maximum Ratings 5 Absolute Maximum Ratings Stresses beyond those listed in Table 3 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table Absolute Maximum Ratings Parameter Min Max Units Comments VDD to GND CNVST, SCLK, DOUT, REF, AIN1/ AIN+, AIN2/AIN- to GND VDD + Current into Any Pin Datasheet - Ordering Information 11 Ordering Information The devices are available as the standard products shown in Table Table Ordering Information Ordering Code AS1524-BTDT 150ksps, 12-Bit, 1-Channel True-Differential ADC AS1524-BTDR AS1525-BTDT AS1525-BTDR 150ksps, 12-Bit, 1-Channel True-Differential ADC 150ksps, 12-Bit, 2-Channel Single-Ended ADC 150ksps, 12-Bit, 2-Channel Single-Ended ADC Delivery Form Tape & Reel Tray Tape & Reel Tray Package 8-pin TDFN 3x3mm 8-pin TDFN 3x3mm 8-pin TDFN 3x3mm 8-pin TDFN 3x3mm Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at 21 - 22 AS1524/AS1525 Datasheet Copyrights Copyright 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 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 life-sustaining 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 Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 22 - 22 |
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