AD7808BRZ

Overview

The AD7808BRZ is an octal 10-bit digital-to-analog converter (DAC) from Analog Devices, housed in a 24-lead SOIC package. It operates on a single +3.3 V to +5 V supply and features serial data loading via SPI-compatible interfaces. The device integrates an on-chip reference and includes double-buffered DAC registers for simultaneous analog output updates. Key static performance metrics include a maximum relative accuracy of ±4 LSB and a gain error of ±3% FSR. The unit supports power-down modes with current consumption as low as 1 mA.

Feature Summary

• Octal configuration providing eight independent 10-bit DAC channels in a single package.
• Serial interface utilizing FSIN, CLKIN, and SDIN lines for data input.
• Integrated internal voltage reference outputting approximately 1.23 V.
• Double-buffered data registers enabling simultaneous update of all analog outputs.

Applications

• Optical disk drives
• Process control systems
• Voltage setpoint control
• Automatic calibration circuits

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the RoHS-compliant 24-lead Small Outline IC (SOIC) package variant. Confirm that the B-grade accuracy specifications align with system requirements, noting the ±4 LSB relative accuracy limit. Ensure the design accommodates the required serial timing parameters for FSIN and CLKIN signals.

Selection Notes

Select this component when multiple low-resolution analog outputs are required within a compact footprint. The AD7808 is suitable for designs needing simultaneous channel updates via the LDAC pin. Consider the AD7809 if parallel loading capabilities are preferred over the serial interface provided by the AD7808.

Part Context

The AD7808 belongs to the AD7804/AD7805/AD7808/AD7809 family of CMOS DACs. While the AD7804 offers four channels, the AD7808 provides eight. The BRZ suffix indicates a lead-free, RoHS-compliant version packaged in a standard SOIC format, distinguishing it from the PDIP or SSOP variants available in the same product line.

Replacement Considerations

The AD7808BNZ serves as a direct replacement offering identical functionality in a 24-lead PDIP package. For applications requiring parallel data loading instead of serial, the AD7809BRZ provides the same octal architecture with compatible electrical characteristics.