AD5668ARUZ-3

Overview

The AD5668ARUZ-3 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 a versatile 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards, with clock rates up to 50 MHz. Key specifications include ±1 LSB differential nonlinearity, ±16 LSB integral nonlinearity, and rail-to-rail output swing.

Feature Summary

• Octal architecture with eight independent 16-bit DAC channels in a 16-lead TSSOP package.
• Internal 2.5 V precision reference enabling a 5 V full-scale output range.
• Power-on reset function ensures outputs initialize to midscale voltage levels.
• 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 analog signal conditioning.
• Portable battery-powered instruments due to 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 package type is 16-lead TSSOP (RU-16). Ensure compatibility with the required operating temperature range of -40°C to +105°C. Check for RoHS compliance status as per the manufacturer's latest documentation.

Selection Notes

Select the AD5668ARUZ-3 when an octal 16-bit resolution is required with a fixed 5 V output span. Choose this part over the AD5668ARUZ-2 if an internal 2.5 V reference is preferred over a 1.25 V reference. Consider the AD5668BRUZ-1 variant if a lower drift 5 ppm/°C reference is needed for higher precision applications. Evaluate power-down requirements against the available software-selectable load options.

Part Context

The AD5668ARUZ-3 belongs to the denseDAC family, which includes the AD5628 (12-bit) and AD5648 (14-bit) variants. These devices share pinouts and functional blocks but differ in resolution and reference configurations. The ARUZ-3 specifically denotes the A-grade performance level, 16-lead TSSOP packaging, and the -3 suffix indicating the 2.5 V internal reference option.

Replacement Considerations

The AD5668ARUZ-2 is a direct replacement if the application can accommodate a 2.5 V full-scale range instead of 5 V. The AD5668BCPZ-1 offers similar functionality in a LFCSP package but requires PCB layout adjustments. Cross-reference with MS5268 for potential pin-compatible alternatives from other manufacturers.