AS1502-T

Digital Potentiometers Overview

The AS1502-T is a digital potentiometer featuring a nominal resistance of 50kΩ and 256 programmable steps. It operates on a single supply voltage ranging from 2.7V to 5.5V and utilizes a 3-wire serial interface with data loading rates up to 10MHz. The device incorporates glitch-free switching, low standby current below 1µA, and an extended industrial temperature range of –40°C to +125°C. Packaged in an 8-pin SOIC, it serves as a reliable electronic replacement for mechanical potentiometers.

Digital Potentiometers Feature Summary

• Nominal Resistance: 50kΩ (±20%) with 256 linear taps
• Interface: 3-Wire Serial (SDI, CK, CSN) supporting 10MHz update rates
• Power Supply: Single supply operation from 2.7V to 5.5V
• Temperature Range: Extended industrial range (-40°C to +125°C)
• Glitch-Free Operation: Ensures no output glitches during code transitions

Digital Potentiometers Applications

• Volume controls in TV sets and audio systems
• Line impedance matching applications
• Programmable filter circuits
• Power supply adjustment mechanisms

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates Tape and Reel delivery form rather than standard tubes. Confirm the manufacturer designation aligns with austriamicrosystems AG or ams AG technical documentation. Ensure the component meets the specified 8-bit resolution and 50kΩ tolerance requirements for the target circuit design.

Digital Potentiometers Selection Notes

Select the AS1502-T when a 50kΩ digital resistance value is required. Compare against AS1500 (10kΩ), AS1501 (20kΩ), and AS1503 (100kΩ) if different nominal resistances are needed. Consider the 8-pin SOIC package constraints and verify that the 3-wire serial interface timing matches the system controller capabilities.

Digital Potentiometers Part Context

The AS1502-T belongs to the AS150x family of 8-bit digital potentiometers manufactured by austriamicrosystems AG (now ams AG). This family includes variants with 10kΩ, 20kΩ, 50kΩ, and 100kΩ fixed resistor values. The 'T' suffix specifically denotes the Tape and Reel packaging format for automated assembly.

Digital Potentiometers Replacement Considerations

Direct replacements within the same family include AS1500, AS1501, and AS1503 for different resistance values. Verify pin compatibility with the 8-pin SOIC footprint. Ensure the replacement supports the required 2.7V to 5.5V operating voltage and -40°C to +125°C temperature range.