AD5674BCPZ-1

Overview

The AD5674BCPZ-1 is a low-power, 16-channel, 12-bit buffered voltage output digital-to-analog converter (DAC) from Analog Devices. It features an internal 2.5 V reference with a typical temperature coefficient of 2 ppm/°C and a user-selectable gain pin for full-scale outputs of 2.5 V or 5 V. Operating on a single 2.7 V to 5.5 V supply, the device guarantees monotonicity by design and includes a power-on reset circuit ensuring zero-scale or midscale startup. It utilizes a 50 MHz SPI interface with readback or daisy-chain capabilities and is housed in a 28-lead, 4 mm × 4 mm LFCSP package.

Feature Summary

• 16 channels in a compact 4 mm × 4 mm LFCSP package
• High relative accuracy with integral nonlinearity (INL) of ±1 LSB maximum at 12 bits
• Internal 2.5 V voltage reference with 2 ppm/°C typical drift
• User-selectable gain of 1 or 2 via GAIN pin for 2.5 V or 5 V full-scale output

Applications

• Optical transceivers
• Base station power amplifiers
• Process control programmable logic controller (PLC) input/output cards
• Industrial automation systems
• Data acquisition systems

Procurement Notes

Verify the specific suffix '-1' against the manufacturer's ordering guide to confirm the exact power-up state configuration (zero-scale vs. midscale). Ensure the required gain setting matches the hardware connection on the GAIN pin, as this determines the final output voltage range. Confirm that the 28-lead LFCSP thermal requirements are met by the target PCB layout.

Selection Notes

Select the AD5674BCPZ-1 when 12-bit resolution is sufficient for the application, offering higher channel density than the 16-bit AD5679 variant. The internal reference simplifies design but requires checking if the 2.5 V base span meets system needs, especially when using Gain = 2. Verify that the 50 MHz SPI speed and 1.8 V logic compatibility align with the host microprocessor interface.

Part Context

This component belongs to the nanoDAC+ family, which integrates high-density DACs with precision references. The AD5674 series specifically targets applications requiring multiple analog outputs in a small footprint. The 'BCPZ' designation indicates the commercial temperature range (-40°C to +125°C), RoHS compliance, and the specific LFCSP package type used for surface-mount assembly.

Replacement Considerations

The AD5674RBCPZ-1 is a direct functional replacement within the same family, differing primarily in the default power-up state of the DAC outputs. Other variants like the AD5679 offer 16-bit resolution but may have different accuracy specifications and pricing structures.