AD7303BRMZ-REEL

Overview

The AD7303BRMZ-REEL is a dual, 8-bit 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 rail-to-rail output buffers with a typical settling time of 1.2 μs. The device utilizes a versatile 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards, supporting clock rates up to 30 MHz. It includes an internal reference capability or accepts external references between 1 V and VDD/2. Power consumption is typically 2.3 mA at 3.3 V, reducing to less than 1 μA in full power-down mode.

Feature Summary

• Dual 8-bit DACs with rail-to-rail output buffering and 1.2 μs typical settling time
• 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards
• Internal or external reference selection via control register
• Individual DAC power-down function with full power-down current < 1 μA

Applications

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

Procurement Notes

Verify the RM-8 microSOIC package designation for the BRMZ suffix against the manufacturer's ordering guide. Confirm that the REEL suffix indicates tape-and-reel packaging suitable for automated assembly processes. Ensure compatibility with the specified -40 °C to +105 °C temperature range for the B version.

Selection Notes

Select this component when a dual-channel, low-power DAC with serial interface is required. The internal reference simplifies design by eliminating external reference components, though external references are supported for higher precision. Ensure the load capacitance does not exceed 100 pF to maintain stability and settling time specifications.

Part Context

The AD7303 belongs to a family of low-power, single-supply DACs designed for portable applications. The BRMZ variant specifically denotes the microSOIC (RM-8) package option within the AD7303 series, offering a compact footprint compared to standard SOIC or DIP packages while maintaining identical electrical performance characteristics.

Replacement Considerations

Direct pin-compatible replacements within the same package may include other dual 8-bit serial DACs from Analog Devices, such as the AD7304 if quad channels are acceptable, provided interface timing and power requirements align. Verify package dimensions and thermal impedance differences when substituting.