AD8522AR

Overview

The AD8522AR is a dual 12-bit, single-supply voltage output digital-to-analog converter (DAC) in a 14-lead SOIC package. Fabricated using CBCMOS technology, it integrates a laser-trimmed bandgap reference and buffered rail-to-rail output amplifiers. The device operates on a +5 V supply with a typical power dissipation of 10 mW to 25 mW. It features a serial interface for direct microcontroller connection and provides a 4.095 V full-scale output with 1 mV/LSB resolution. Key electrical parameters include a settling time of 16 μs to ±1 LSB, relative accuracy of ±1.5 LSB, and an operating temperature range from -40°C to +85°C.

Feature Summary

• Dual 12-bit DACs with integrated 2.5 V bandgap reference and buffered voltage outputs
• Serial interface supporting hardware-load and software-load modes via CS, CLK, SDI, LDA, and LDB pins
• Rail-to-rail output capability with ±5 mA drive strength and up to 500 pF capacitive load tolerance
• Asynchronous reset function via RS pin to set outputs to zero or mid-scale

Applications

• Digitally controlled calibration systems
• Servo control loops
• Process control equipment
• Portable instrumentation
• Cellular base station voltage adjustment

Procurement Notes

Verify the specific suffix 'AR' corresponds to the 14-lead SOIC package option when sourcing. Confirm that the required operating temperature range aligns with the -40°C to +85°C specification. Ensure logic levels from the driving microcontroller are compatible with the specified VIL and VIH thresholds for reliable serial data transmission.

Selection Notes

Select this component for applications requiring a complete dual-channel solution without external components. It is suitable for +5 V single-supply systems where low power consumption and space-saving surface mount packaging are priorities. Consider the 16 μs settling time and 1.5 LSB accuracy limits for precision requirements.

Part Context

The AD8522AR is the surface-mount variant of the AD8522 family, distinguished by its 14-lead Narrow Body SOIC package compared to the PDIP-14 option. It shares identical electrical characteristics and functionality with other AD8522 models, offering a compact footprint for high-density PCB designs while maintaining the same serial interface and performance metrics.

Replacement Considerations

The AD8522AN serves as the pin-compatible through-hole alternative within the same product family. Verify package dimensions and thermal resistance differences between the SOIC-14 and PDIP-14 options during substitution.