ALD500RAU-10SEL

Analog To Digital Converters (ADC) Overview

The ALD500RAU-10SEL is a precision integrating dual-slope analog processor manufactured by Advanced Linear Devices Inc. It operates on ±5V supplies and supports up to 18-bit resolution with a typical temperature coefficient of 10 ppm/°C. The device features differential analog inputs, an internal voltage reference, and automatic zero offset compensation. Key electrical parameters include a typical input current of 2pA, power dissipation of 6mW, and a fast zero-crossing comparator delay of 1μs. It is housed in a 20-pin SOIC package.

Analog To Digital Converters (ADC) Feature Summary

• Dual-slope integrating architecture providing high noise immunity and accuracy independent of component absolute values.
• Resolution up to 18 bits plus sign bit, with linearity error as low as 0.001% typical.
• On-chip precision voltage reference with temperature coefficient guaranteed at 10 ppm/°C.
• Automatic zero offset compensation and polarity detection for simplified digital interface.

Analog To Digital Converters (ADC) Applications

• 4 1/2 to 5 1/2 digits plus sign measurements
• Precision analog signal processing
• High accuracy DC measurement functions
• Portable battery operated instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'SEL' against the manufacturer's official documentation to confirm packaging details and availability status. Ensure the design utilizes ±5V power supplies and external timing components (RINT, CINT) as specified in the datasheet for optimal performance. Confirm that the 20-SOIC package dimensions match the PCB footprint requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high-resolution DC measurements with inherent noise rejection. The RAU variant offers the highest accuracy class (18-bit, 10 ppm/°C tempco). Designers must account for the conversion speed trade-off; higher resolution requires longer integration times. Ensure the microcontroller can handle the four-phase control sequence (Auto Zero, Integrate, Deintegrate, Integrator Zero).