Microchip Technology

MCP40D18T-503AE/LT  

Digital Potentiometers

MCP40D18T-503AE/LT Description

The MCP40D18T-503AE/LT from Microchip Technology is a 50kΩ, 128-tap, volatile, digital potentiometer (digipot) designed for precision analog circuit adjustment in modern electronics. Packaged in a compact SC70-6 form factor and supplied via Tape & Reel (TR), this surface-mount device operates over a 1.8V to 5.5V range, making it suitable for low-power and battery-operated systems. Its I2C interface enables seamless digital control, while its linear taper and ±20% tolerance ensure consistent performance in variable-resistance applications. With a 155Ω typical wiper resistance and 150ppm/°C temperature coefficient, it balances accuracy with thermal stability.

MCP40D18T-503AE/LT Features

• Rheostat Configuration: Optimized for adjustable resistance applications without requiring a dedicated voltage divider.
• Wide Voltage Range (1.8V–5.5V): Compatible with both 3.3V and 5V systems, ideal for mixed-voltage designs.
• 128 Taps: Fine-grained resolution for precise analog signal tuning.
• I2C Interface: Simplifies integration with microcontrollers and digital systems.
• Low Wiper Resistance (155Ω): Minimizes signal attenuation in high-precision circuits.
• RoHS3/REACH Compliant: Meets stringent environmental and safety standards.
• Volatile Memory: Resets to mid-scale on power-up, ensuring predictable startup behavior.

MCP40D18T-503AE/LT Applications

This digipot excels in:

• Portable Electronics: Battery-powered devices like wearables and IoT sensors benefit from its low-voltage operation.
• Industrial Control Systems: Calibration, gain adjustment, and feedback loop tuning in automation equipment.
• Audio Equipment: Volume control and tone adjustment in compact audio interfaces.
• Test & Measurement: Programmable resistance for prototyping and calibration fixtures.
• Automotive Electronics: Sensor trimming and infotainment system adjustments (within non-safety-critical subsystems).

Conclusion of MCP40D18T-503AE/LT

The MCP40D18T-503AE/LT stands out for its compact size, low-voltage versatility, and digital precision, offering a cost-effective alternative to mechanical potentiometers. Its I2C programmability and 128-tap resolution make it ideal for space-constrained, digitally controlled analog systems. While its volatile memory limits standalone use, it ensures repeatability in powered applications. For engineers seeking a reliable, industry-compliant digipot, this Microchip model delivers robust performance across consumer, industrial, and automotive domains.

MCP40D18T-503AE/LT Documents

Download datasheets and manufacturer documentation for MCP40D18T-503AE/LT

PCN Assembly/Origin :

Qualification Report 17/Dec/2013      

Datasheets :

MCP40D17/18/19      

PCN Packaging :

MBB/Label Chgs 16/Nov/2018       Packing Changes 10/Oct/2016      

Design Resources :

MCP40D18 Development Tool Selector      

HTML Datasheet :

MCP40D17/18/19      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH