DS1267-050

Digital Potentiometers Overview

The DS1267-050 is a dual digital potentiometer IC from Analog Devices/Maxim Integrated, featuring two independent 256-position wipers with a nominal end-to-end resistance of 50 kΩ. It operates on a single +5V supply (4.5V to 5.5V) and utilizes a 3-wire serial interface for setting or reading wiper positions via an internal 17-bit I/O shift register. The device supports stacked configurations to double total resistance and resolution, as well as cascading multiple units over a single bus. Key electrical characteristics include a typical supply current of 650 µA, ±20% resistor tolerance, and a temperature coefficient of 750 ppm/°C.

Digital Potentiometers Feature Summary

• Dual 256-position digitally controlled potentiometers with 50 kΩ nominal resistance
• 3-wire serial interface (RST, CLK, DQ) for data input and output
• Stacked configuration capability for increased total resistance and 9-bit resolution
• Cascading/daisy-chaining support for multi-device control

Digital Potentiometers Applications

• Inverting variable gain amplifier circuits
• Fixed gain attenuator applications
• Multi-device systems requiring centralized digital control

Digital Potentiometers Procurement Notes

Verify the specific package variant required, as the DS1267 family is available in 14-pin DIP, 16-pin SOIC, and 20-pin TSSOP packages. Confirm that the system design accommodates the volatile memory nature of the wiper settings, which reset to 50% upon power-up. Ensure the substrate bias pin (VB) is correctly handled if negative voltages are present in the application circuit.

Digital Potentiometers Selection Notes

Select the DS1267-050 when a 50 kΩ resistance value is required. Note that the -3 dB cutoff frequency for this specific resistance value is 200 kHz. Consider the DS1267-10 or DS1267-100 if lower or higher resistance values are needed, respectively. Verify that the 3-wire serial protocol aligns with the host processor's capabilities, as it differs from standard SPI interfaces.

Digital Potentiometers Part Context

The DS1267 series includes variants with 10 kΩ (DS1267-10), 50 kΩ (DS1267-050), and 100 kΩ (DS1267-100) resistances. All variants share the same dual-potentiometer architecture, 256-step resolution, and 3-wire serial control logic. The primary distinction between models lies in the analog resistor characteristics, specifically the end-to-end resistance and the resulting bandwidth (-3 dB cutoff frequency).

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.