DESCRIPTION The AD5171 is a 64-position, one-time programmable (OTP) 2 that uses fuse link technology to achieve the memory retention of the resistance setting function. OTP is a cost-effective alternative over the EEMEM approach for users who do not need to reprogram new memory settings in the digital potentiometer. This device performs the same electronic adjustment function as most mechanical trimmers and variable resistors. The AD5171 is programmed using a 2-wire, I2C-compatible digital control. It allows unlimited adjustments before permanently setting the resistance value. During the OTP activation, a permanent fuse blown command is sent after the final value is determined, freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical trimmer). FUNCTIONAL BLOCK DIAGRAM GNDAWBVDDAD0SDASCLAD517103437-001WIPERREGISTERI2C INTERFACEANDCONTROL LOGICFUSELINK Figure 1. W1VDD23SCL4A8B7AD06SDA5AD5171TOP VIEW(Not to Scale)03437-002 Figure 2. Pin Configuration Wh FEATURES 64 position One-time programmable (OTP) set-and-forget resistance setting low cost alternative over EEMEM 5 k , 10 k , 50 k , 100 k end-to-end resistance Low temperature coefficient: 5 ppm/ C in potentiometer mode Low temperature coefficient: 35 ppm/ C in rheostat mode Compact standard 8-lead SOT-23 package Low power: IDD = 10 A maximum Fast settling time: tS = 5 s typical in power-up I2C-compatible digital interface Computer software replaces microcontroller in factory programming applications Full read/write of wiper register Extra I2C device address pin Low operating voltage: 2.7 V to 5.5 V OTP validation check function Automotive temperature range: 40 C to +125 C APPLICATIONS System calibrations Electronics level settings Mechanical trimmers and potentiometer replacements Automotive electronics adjustments Gain control and offset adjustments Transducer circuit adjustments Programmable filters up to 1.5 MHz BW1 GENERAL DESCRIPTION The AD5171 is a 64-position, one-time progr Specifications subject to change without notic