WMS7202010P

Digital Potentiometers Overview

The WMS7202 is a dual-channel, non-volatile digital potentiometer featuring 256 taps per channel. It offers end-to-end resistances of 10 kΩ, 50 kΩ, and 100 kΩ. The device operates within a voltage range of 2.7V to 5.5V and supports industrial temperatures from -40°C to 85°C. Each channel includes four non-volatile memory locations (NVMEM0–3) for storing wiper positions, with NVMEM0 automatically loaded upon power-up. An optional output buffer can be enabled per channel via the SPI interface. Standby current is typically 1 µA when the buffer is inactive.

Digital Potentiometers Feature Summary

• Dual independent channels with 256-tap resolution
• Non-volatile storage of four preset wiper positions per channel
• SPI serial interface with daisy-chain capability
• Selectable output buffer for each channel

Digital Potentiometers Applications

• Audio volume control and tone adjustment
• Industrial process control calibration
• Programmable gain amplifier settings
• Voltage reference trimming

Digital Potentiometers Procurement Notes

Verify the specific resistance value suffix (e.g., 10K, 50K, 100K) and package type (PDIP, SOIC, TSSOP) required for the design. Confirm that the system voltage remains within the 2.7V to 5.5V operating range. Ensure the SPI interface timing meets the specified clock cycle requirements.

Digital Potentiometers Selection Notes

Select the appropriate end-to-end resistance based on the load requirements. Choose the package style compatible with the PCB layout constraints. Consider enabling the output buffer if driving low-impedance loads is necessary, noting the increased current consumption compared to the passive mode.

Digital Potentiometers Part Context

The WMS7202 belongs to the WMS720x family of non-volatile digital potentiometers manufactured by Winbond. It provides a software-replaceable alternative to mechanical potentiometers, offering durability and precise digital control over resistance values without physical wear.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include other WMS720x variants with different resistance values or package options. Verify that any substitute maintains the 256-tap resolution and non-volatile memory architecture.