AD5684BRUZ

Overview

The AD5684BRUZ is a quad, 12-bit buffered voltage output digital-to-analog converter (DAC) from the nanoDAC+ family. It features an SPI interface with clock rates up to 50 MHz and operates on a single 2.7 V to 5.5 V supply. The device guarantees monotonicity by design with a maximum integral nonlinearity of ±1 LSB. Key specifications include a total unadjusted error of ±0.1% FSR, offset error of ±1.5 mV, and a high drive capability of 20 mA. It supports user-selectable gain of 1 or 2 via the GAIN pin, allowing full-scale outputs of 0 V to VREF or 0 V to 2 × VREF respectively.

Feature Summary

• Quad 12-bit resolution with ±1 LSB maximum INL
• 50 MHz SPI interface with readback and daisy-chain support
• Low power consumption: 1.8 mW at 3 V; 4 µA in power-down mode
• High drive capability: 20 mA load current

Applications

• Digital gain and offset adjustment
• Programmable attenuators
• Process control PLC I/O cards
• Industrial automation systems
• Data acquisition systems

Procurement Notes

Verify the specific grade (A or B) required for your application, as performance parameters like relative accuracy vary between grades. Confirm the package type is TSSOP-16, as LFCSP variants exist. Ensure the external reference voltage matches the device's input range requirements for the selected gain setting.

Selection Notes

Select the AD5684BRUZ when four independent 12-bit channels are needed with low cost and moderate precision. Choose this over the AD5686 if 16-bit resolution is not required. Verify that the system logic levels are compatible with the 1.62 V to 5.5 V VLOGIC range. Consider the 20 mA drive capability for direct sensor interfacing without additional amplification.

Part Context

The AD5684BRUZ belongs to the AD568x series of nanoDAC+ devices, which share a common functional block diagram and serial interface protocol. It is the 12-bit counterpart to the 16-bit AD5686. Both devices utilize the same 16-lead TSSOP and LFCSP packages and offer identical power management features, including per-channel power-down modes.

Replacement Considerations

The AD5686BRUZ offers higher 16-bit resolution but shares the same package and interface. For lower channel counts, consider the AD5687 (dual channel). If I2C interface is preferred instead of SPI, the AD5694 series is functionally similar but uses a different communication protocol.