AD5660BRJZ-3REEL7

Overview

The AD5660BRJZ-3REEL7 is a single-channel, 16-bit digital-to-analog converter (DAC) from the nanoDAC family. It features an internal 2.5 V reference with a temperature coefficient of 5 ppm/°C, providing a full-scale output range of 5 V. The device operates on a single power supply ranging from 2.7 V to 5.5 V and includes a rail-to-rail buffered output amplifier. It utilizes a versatile 3-wire serial interface compatible with standard SPI, QSPI, MICROWIRE, and DSP protocols, supporting clock rates up to 30 MHz. The component incorporates a power-on reset circuit that defaults the output to midscale upon initialization.

Feature Summary

• Integrated precision voltage reference with low temperature drift
• Rail-to-rail buffered analog output stage
• Software-selectable power-down modes for reduced consumption
• Power-on reset mechanism ensuring predictable startup state

Applications

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

Procurement Notes

Verify the specific suffix '3' indicates the inclusion of the internal 2.5 V reference and midscale power-on reset behavior. Confirm the package type matches the required footprint, as this part number corresponds to the SOT-23 or MSOP variant depending on the exact ordering code structure within the ADI catalog. Ensure compatibility with the intended operating voltage range.

Selection Notes

Select this component when a high-resolution 16-bit DAC is required in a compact form factor. The internal reference eliminates the need for external precision components, simplifying the design. Consider the settling time and linearity specifications against system requirements. Verify that the serial interface timing meets the microcontroller or processor capabilities.

Part Context

This device belongs to the AD5620/AD5640/AD5660 nanoDAC family, which offers 12-, 14-, and 16-bit resolutions respectively. These parts are designed for low-power applications requiring small footprints. The family shares common architectural features, including the serial interface and power management options, allowing for scalable design across different resolution needs.

Replacement Considerations

The AD5662 serves as a related device offering similar 16-bit resolution but requires an external reference. Other members of the nanoDAC family, such as the AD5640 and AD5620, provide lower resolutions. Check pinout compatibility if substituting with other packages like LFCSP.

FAQ

What is the default output state after power-up?

The AD5660-3 variant powers up to midscale due to its integrated power-on reset circuit.

How does the serial interface handle data updates?

Data is clocked into the shift register on the falling edge of SCLK. The DAC updates following the final clock cycle unless the SYNC signal is asserted high earlier to interrupt the sequence.

What is the maximum serial clock frequency?

The serial clock can operate at rates up to 30 MHz when the supply voltage is between 3.6 V and 5.5 V.