AD5668ARUZ-3REEL7

Overview

The AD5668ARUZ-3REEL7 is an octal, 16-bit, buffered voltage-output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7 V to 5.5 V supply and features an internal 2.5 V reference with 5 ppm/°C temperature coefficient, providing a 5 V full-scale output range. The device includes a power-on reset circuit that initializes outputs to midscale upon startup. It supports serial interfaces including SPI, QSPI, Microwire, and DSP standards with clock rates up to 50 MHz. Key electrical parameters include 16-bit resolution, 95 kS/s sampling rate, 6 µs settling time, and ±1 LSB differential nonlinearity.

Feature Summary

• Octal architecture with eight independent 16-bit DAC channels in a 16-lead TSSOP package
• Internal 2.5 V precision reference enabling 5 V rail-to-rail output swing
• Power-on reset function initializing all outputs to midscale
• Low power consumption with three selectable power-down modes reducing current to 400 nA at 5 V

Applications

• Process control systems requiring multi-channel signal generation
• Data acquisition systems for precise analog signal conditioning
• Portable battery-powered instruments utilizing low-power operation
• Programmable voltage and current sources
• Digital gain and offset adjustment circuits

Procurement Notes

Verify the specific suffix '3' indicates the internal 2.5 V reference configuration during procurement. Confirm the REEL7 designation corresponds to tape-and-reel packaging containing 1000 units. Ensure compatibility with the required 16-lead TSSOP footprint and thermal management requirements for industrial temperature ranges.

Selection Notes

Select this component when eight simultaneous 16-bit voltage outputs are required within a compact surface-mount form factor. The internal 2.5 V reference simplifies design by eliminating external reference components while maintaining 5 V output span. Consider the 6 µs settling time and 50 MHz interface speed for system timing constraints. Verify that the midscale power-on reset state aligns with application safety requirements.

Part Context

This part belongs to the AD5628/AD5648/AD5668 denseDAC family, which offers pin-compatible options for 12-bit, 14-bit, and 16-bit resolutions. The AD5668 represents the highest resolution variant in this series. The 'ARUZ' code specifies the industrial temperature range (-40°C to +105°C) and 16-lead TSSOP package. The suffix '-3' distinguishes it from other reference configurations within the same package type.

Replacement Considerations

Direct substitutes within the same family include AD5668ARUZ-2REEL7, which utilizes an internal 2.5 V reference but initializes to zero scale instead of midscale. For applications not requiring eight channels, consider lower channel count variants such as the AD5686. Cross-model replacements require verification of pinout compatibility and reference initialization behavior.