MAX522CPA+

Digital To Analog Converters Overview

The MAX522CPA+ is a dual, 8-bit, voltage-output serial digital-to-analog converter in an 8-pin plastic DIP package. It operates from a single +2.7V to +5.5V supply with typical operating current below 1mA and shutdown current under 1µA. The device features a 3-wire serial interface compatible with SPI, QSPI, and Microwire standards, supporting clock rates up to 5MHz. DAC A provides a buffered output capable of sourcing and sinking 5mA, while DAC B sources and sinks 500µA. Both outputs are rail-to-rail within 0.5V of ground and VDD.

Digital To Analog Converters Feature Summary

• Dual 8-bit buffered voltage-output DACs with independent programmable shutdown modes
• Ultra-low power consumption with less than 1µA shutdown current and reference input disconnection
• Space-saving 8-pin SO or DIP package design suitable for portable applications
• 5MHz 3-wire serial interface compatible with standard microprocessor communication protocols

Digital To Analog Converters Applications

• Digital gain and offset adjustment circuits
• Programmable current and voltage sources
• Power amplifier bias control systems
• Voltage-controlled oscillator (VCO) tuning

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'CPA+' indicates the commercial temperature range (0°C to +70°C) and lead-free compliant packaging as per the manufacturer's ordering guide. Confirm that the PDIP-8 package style matches the target PCB footprint requirements. Ensure compatibility with existing serial interface logic levels before integration into new designs.

Digital To Analog Converters Selection Notes

Select this component when dual-channel analog output is required in a minimal footprint. Choose based on the need for independent shutdown control to minimize system power drain. Verify that the 8-bit resolution and 5mA source capability of DAC A meet the load requirements. Ensure the serial interface timing constraints align with the host microcontroller's capabilities.

Digital To Analog Converters Part Context

The MAX522 belongs to Maxim Integrated's family of low-power serial digital-to-analog converters. It shares software compatibility with the MAX512 and MAX513 triple 8-bit DACs, allowing for potential migration between parts without significant code changes. The device is designed for battery-powered applications where space and power efficiency are critical constraints.

Digital To Analog Converters Replacement Considerations

Direct functional substitutes include the MAX522EPA+ for extended temperature ranges (-40°C to +85°C). The MAX522ESA+ serves as the surface-mount equivalent in an 8-pin SO package. Verify pinout compatibility and thermal performance differences when transitioning between package types or temperature grades.

Digital To Analog Converters FAQ

How does the shutdown mode affect the reference input?

In shutdown mode, the reference input is disconnected from the REF pin, presenting a high impedance of approximately 2MΩ. This conserves current by preventing the system reference from being loaded during inactive periods.

What is the difference in output drive capability between DAC A and DAC B?

DAC A’s buffer can source and sink up to 5mA of current, whereas DAC B’s output buffer is limited to sourcing and sinking 500µA. Both buffers maintain operation within 0.5V of the supply rails.

Is there an internal power-on reset mechanism?

No, the MAX522 does not contain an internal power-on reset. An initial write operation must be performed at power-up to set the outputs to the desired voltage state.