The AD5170 is a 256-position, two-time programmable (TTP) digital potentiometer* that employs fuse link technology to enable two opportunities at permanently programming the resistance setting. OTP is a cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer setting in memory more than once. This device performs the same electronic adjustment function as mechanical potentiometers or variable resistors with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance.
The AD5170 is programmed using a 2-wire, I2C compatible digital interface. Unlimited adjustments are allowed before permanently (there are actually two opportunities) setting the resistance value. During OTP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer). Unlike traditional OTP digital potentiometers, the AD5170 has a unique temporary OTP overwrite feature that allows for new adjustments even after the fuse has been blown. However, the OTP setting is restored during subsequent power-up conditions. This feature allows users to treat these digital potentiometers as volatile potentiometers with a programmable preset.
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Systems calibration Electronics level setting Mechanical Trimmers® replacement in new designs Permanent factory PCB setting Transducer adjustment of pressure, temperature, position,chemical, and optical sensors RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment
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256-position TTP (two-time programmable) set-and-forget resistance setting allows second-chance permanent programming Unlimited adjustments prior to OTP (one-timeprogramming) activation OTP overwrite allows dynamic adjustments with user defined preset End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Compact MSOP-10 (3 mm * 4.9 mm) package Fast settling time: tS = 5 µs typ in power-up Full read/write of wiper register Power-on preset to midscale Extra package address decode pins AD0 and AD1 Single supply 2.7 V to 5.5 V Low temperature coefficient: 35 ppm/°C Low power, IDD = 6 µA max Wide operating temperature: 40°C to +125°C Evaluation board and software are available Software replaces µC in factory programming applications
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VDD to GND 0.3 V to +7 V
VA, VB, VW to GND VDD
Terminal Current, AxBx, AxWx, BxWx1
Pulsed ±20 mA
Continuous ±5 mA
Digital Inp
Post a Buying Lead
Required Field 
