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AS1506
2 5 6 - Ta p D i g i ta l P o t e n t i o m e t e r w i t h S P I I n t e r f a c e a n d High Endurance EEPROM
Product Brief
1 General Description
The AS1506 is a linear, 256-tap digital potentiometer specifically designed to replace discrete/mechanical potentiometers and is ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gain, and amplifier circuit configurations. The device is controlled via a 3-wire SPI-compatible interface and features an internal EEPROM for storing wiper positions. Several device variants are available differentiated by end-to-end resistance as shown in Table 1. Table 1. Standard Products Model AS1506-10 AS1506-50 AS1506-100 End-to-End Resistance (k) 10 50 100
2 Key Features
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High Endurance: EEPROM up to 10M cycles High Reliability: EEPROM up to 150 years data retension @ 85C Wiper Position Retained in EEPROM and loaded at Power-Up 256 Tap Positions 0.5LSB DNL in Voltage Divider Mode 0.5LSB INL in Voltage Divider Mode End-to-End Resistance: 10/50/100k Low End-to-End Resistance Temperature Coefficient: 90ppm/C Low-Power Standby Mode: 100nA 5MHz SPI-Compatible Serial Interface Single-Supply Operation: +2.7 to +5.5V 8-pin TDFN 3x3mm Package
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The 3-wire SPI-compatible serial interface allows communication at data rates up to 5MHz.The internal EEPROM stores the last wiper position for initialization during power-up and a low-power standby mode. The devices are available in an 8-pin TDFN 3x3mm package.
3 Applications
The device is ideal for mechanical potentiometer replacement, low-drift programmable gain amplifiers, audio volume control, LCD contrast control, and low-drift programmable filters.
Figure 1. Block Diagram
1 VDD 8-Bit Shift Register 8 8-Bit Latch 8 256 8 HIGH 256-Position Decoder 2 SCLK 3 SDIO 4 CSN SPI Interface PowerOn Reset 8-Bit EEPROM 7 WIPER
6 LOW
AS1506
5 GND
www.austriamicrosystems.com
Revision 1.01
1-2
AS1506
Product Brief
Copyrights
Copyright (c) 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). 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/contact
www.austriamicrosystems.com
Revision 1.01
2-2

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