AD8522ARZ-REEL

Overview

The AD8522ARZ-REEL is a dual 12-bit, single-supply voltage output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It operates on a +5 V supply and features a serial digital interface with a 16-bit word format containing 12-bit data and address bits. The device includes an onboard 2.5 V bandgap reference and buffered rail-to-rail output amplifiers capable of driving ±5 mA. Key electrical specifications include a full-scale output of 4.095 V (1 mV/LSB), a typical settling time of 16 μs to ±1 LSB, and relative accuracy within ±1.5 LSB. Power consumption is low at approximately 5 mW per DAC channel.

Feature Summary

• Dual 12-bit voltage output DACs with laser-trimmed R-2R ladder architecture
• Integrated 2.5 V curvature-corrected bandgap reference with external buffer capability
• Serial interface supporting hardware-load or software-load modes via CS, CLK, SDI, and LDA/B pins
• Rail-to-rail output buffers providing ±5 mA drive current and up to 500 pF capacitive load stability

Applications

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

Procurement Notes

Verify the package type matches the required form factor; the 'AR' suffix indicates a 14-lead SOIC surface-mount package, while 'AN' denotes a PDIP-14 through-hole variant. Confirm that the REEL designation corresponds to tape-and-reel packaging suitable for automated assembly processes. Ensure static discharge precautions are observed during handling due to ESD sensitivity.

Selection Notes

Select this component for applications requiring precise dual-channel analog generation from a single +5 V supply without external components. It is suitable for microcontroller interfaces using standard three-wire serial protocols. Consider the 16 μs settling time and ±1.5 LSB linearity when designing for high-speed or high-accuracy requirements. Ensure logic levels match CMOS standards for optimal power dissipation.

Part Context

The AD8522 belongs to the family of complete, ready-to-use dual DACs fabricated in CBCMOS process technology. It integrates both analog and digital functions, including input registers, DAC registers, and control logic, into a monolithic structure. This integration eliminates the need for external resistors or operational amplifiers, simplifying board layout and reducing system cost compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified source material.