AD5668BRUZ-3

Overview

The AD5668BRUZ-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, 95 kS/s sampling rate, and 6 µs settling time.

Feature Summary

• Octal architecture with 16-bit resolution and rail-to-rail buffered voltage outputs
• Internal 2.5 V reference enabling 5 V full-scale output range
• Power-on reset to midscale for safe initialization
• Low power consumption with 400 nA current draw in power-down mode at 5 V

Applications

• Process control systems
• Data acquisition systems
• Portable battery-powered instruments
• Digital gain and offset adjustment circuits
• Programmable voltage and current sources

Procurement Notes

Verify the specific suffix '3' indicates the internal 2.5 V reference configuration during procurement. Confirm package availability matches the required TSSOP-16 form factor. Ensure compatibility with the intended operating voltage range of 2.7 V to 5.5 V. Check for RoHS compliance documentation if required by local regulations.

Selection Notes

Select this component when an octal DAC with high precision (16-bit) and low power consumption is required. The internal 2.5 V reference simplifies design by eliminating external reference components. Consider the midscale power-on reset feature for applications requiring defined initial states. Verify that the 3-wire serial interface timing requirements align with the host microcontroller capabilities.

Part Context

The AD5668BRUZ-3 belongs to the AD5628/AD5648/AD5668 denseDAC family. It shares pinout and functional similarities with the 12-bit AD5628 and 14-bit AD5648 variants, allowing for design flexibility across resolution requirements. The 'B' grade denotes specific linearity and accuracy performance levels within the product line.

Replacement Considerations

Direct substitutes within the same family include AD5668ARUZ-3 (A Grade) for potentially tighter accuracy specifications. For lower resolution needs, AD5648 or AD5628 variants may be considered if pin compatibility is maintained. External reference versions like AD5668BRUZ-1 or AD5668BRUZ-2 are available if different reference voltages are preferred.