ALD500AUSCL

Analog To Digital Converters (ADC) Overview

The ALD500AUSCL is a precision integrating analog processor manufactured by Advanced Linear Devices, designed for high-resolution analog-to-digital conversion. It utilizes a dual-slope architecture to achieve up to 18-bit resolution plus sign and over-range bits. The device operates on ±5V power supplies and features a wide bipolar analog input voltage range of ±3.5V with a typical input current of 2pA. Key electrical characteristics include low linearity error as low as 0.002%, automatic zero offset compensation, and inherent noise immunity through integration. It is housed in a 16-pin Wide Body Plastic Small Outline Package (SOIC) and operates within a temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Dual-Slope Architecture: Provides high accuracy independent of absolute component values, relying on the ratio of integration times.
• High Resolution: Supports up to 18-bit resolution plus sign and over-range bits with inherent linearity stability.
• Low Power Dissipation: Typical power consumption is 6mW at ±5V supply.
• Automatic Compensation: Features internal auto-zero phases to cancel offset voltages and buffer errors.

Analog To Digital Converters (ADC) Applications

• 4 1/2 to 5 1/2 digits plus sign precision measurements
• Precision sensor interfaces requiring high accuracy DC measurement
• Portable battery-operated instruments due to low power consumption

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'L' against the official datasheet, as standard listings typically identify the SOIC package with suffixes 'SC' or 'SWC'. Confirm availability and lead times directly with Advanced Linear Devices or authorized distributors, as this component may be subject to long-lead or obsolete status.

Analog To Digital Converters (ADC) Selection Notes

Select the ALD500AUSCL when an 18-bit resolution is required in a surface-mount SOIC package. Ensure the design accommodates the necessary external components: three capacitors (CINT, CAZ, CREF), one resistor (RINT), and a precision voltage reference. Verify that the microcontroller interface supports the required four-phase control logic (Auto Zero, Integrate, Deintegrate, Integrator Zero).

Analog To Digital Converters (ADC) Part Context

The ALD500 series includes variants such as the ALD500AU (18-bit), ALD500A (17-bit), and ALD500 (16-bit). The ALD500AUSCL belongs to the 18-bit subset, sharing the same core integrating processor functionality but distinguished by its specific package type and potentially extended temperature or commercial grade specifications defined by the manufacturer's ordering codes.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Advanced Linear Devices for direct replacements or pin-compatible alternatives within the ALD500 family, ensuring compatibility with the dual-slope control logic and external component requirements.