MAX509BCAP+

Digital To Analog Converters Overview

The MAX509BCAP+ is a quad, serial-input, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices/Maxim Integrated. It operates with a single +5V or dual ±5V supply and features internal precision buffers that swing rail-to-rail. The device includes four separate reference inputs, allowing independent full-scale range setting for each DAC. It utilizes a double-buffered serial interface compatible with SPI, QSPI, and Microwire protocols, supporting clock frequencies up to 10MHz. Key electrical specifications include a total unadjusted error (TUE) of ±1.5 LSB, a settling time of 6µs, and an operating temperature range of 0°C to +70°C. The component is housed in a 20-pin SSOP package.

Digital To Analog Converters Feature Summary

• Quad 8-bit DAC architecture with rail-to-rail buffered outputs
• Independent reference inputs for individual channel full-scale control
• Double-buffered registers enabling synchronous updating via LDAC or software commands
• Serial interface compatible with SPI, QSPI (CPOL=CPHA=0), and Microwire standards

Digital To Analog Converters Applications

• Battery-powered instrumentation systems requiring low power consumption
• Programmable gain amplifiers and variable voltage references
• Distributed data acquisition systems utilizing daisy-chained serial interfaces
• Calibration equipment requiring precise analog output generation

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'CAP+' indicates a lead-free/RoHS-compliant SSOP-20 package configuration. Confirm the 'B' grade designation corresponds to the ±1.5 LSB Total Unadjusted Error specification rather than the tighter ±1 LSB tolerance found in the 'A' grade variants. Ensure the design supports the required 0°C to +70°C commercial temperature range.

Digital To Analog Converters Selection Notes

Select the MAX509BCAP+ when independent reference voltages are required for each of the four channels, distinguishing it from the MAX510 which shares references between pairs. Choose this B-grade variant if a ±1.5 LSB TUE meets system accuracy requirements, offering a potential cost advantage over the A-grade version. Ensure the application can accommodate the 20-pin SSOP footprint and provides adequate thermal dissipation within the specified derating curves.

Digital To Analog Converters Part Context

The MAX509 belongs to the MAX509/MAX510 family of quad serial DACs. The MAX509 is distinguished by providing four distinct reference inputs, whereas the MAX510 consolidates these into two shared inputs across four channels. Both devices share identical core functionality, serial interface protocols, and pinout structures, differing primarily in reference input configuration and package availability.

Digital To Analog Converters Replacement Considerations

Direct replacement options within the same family include the MAX509ACAP+ for applications requiring higher accuracy (±1 LSB TUE). For broader compatibility, verify if the MAX510 series can be adapted if reference sharing is acceptable. Cross-family replacements require validation of serial protocol compatibility and pinout alignment.