AD5666BRUZ-2REEL7

Overview

The AD5666BRUZ-2REEL7 is a quad, 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 integrated 2.5 V reference with 5 ppm/°C temperature coefficient, yielding a 5 V full-scale output range. The device guarantees monotonicity by design and supports serial interfaces including SPI, QSPI, Microwire, and DSP standards at clock rates up to 50 MHz. Key functional attributes include hardware LDAC for simultaneous updates, asynchronous CLR functionality, and power-down modes reducing current consumption to 400 nA at 5 V.

Feature Summary

• Quad-channel 16-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 2.5 V internal reference with 5 ppm/°C stability
• Versatile 3-wire serial interface compatible with standard protocols
• Power-down modes achieving 400 nA consumption 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 ordering suffix REEL7 confirms tape-and-reel packaging upon purchase. Confirm the -2 suffix indicates the specific 2.5 V internal reference variant required for the target application's full-scale voltage needs. Ensure compatibility with the industrial temperature range of −40°C to +105°C.

Selection Notes

Select this component when a quad-channel DAC with high precision and low power consumption is required. The -2 suffix provides a fixed 2.5 V reference for a 5 V output span; use the -1 suffix if a 2.5 V output span is needed. Consider external references if higher precision than the onboard 5 ppm/°C is necessary, as the internal reference is disabled at power-up.

Part Context

This part belongs to the AD5666 family of nanoDACs. The BRUZ designation indicates the B Grade performance level in a 14-lead TSSOP package. The REEL7 suffix specifies the reel quantity for automated surface-mount assembly processes.

Replacement Considerations

The AD5666BRUZ-1REEL7 serves as a direct pin-compatible alternative within the same family, differing only in the internal reference voltage (1.25 V vs. 2.5 V). Other ADI nanoDACs may require interface or pinout verification before substitution.

FAQ

What is the default state of the internal reference at power-up?

The onboard reference is off at power-up to allow the use of an external reference. It is turned on only after a valid write operation is performed to the DAC.

How does the Power-On Reset (POR) function work?

The POR circuit ensures the DAC output powers up to 0 V if the POR pin is tied low, or to midscale if the POR pin is tied high. The output remains at this level until a valid write takes place.

What is the maximum serial clock frequency supported?

The versatile 3-wire serial interface operates at clock rates of up to 50 MHz.