AD5687BRUZ

Overview

The AD5687BRUZ is a dual, 12-bit buffered voltage output digital-to-analog converter (DAC) from the nanoDAC+ family. It operates on a single 2.7 V to 5.5 V supply and features a versatile 50 MHz SPI interface with readback capability. The device includes a user-selectable gain pin for full-scale outputs of 2.5 V or 5 V. Key electrical specifications include a maximum settling time of 7 µs, ±1 LSB integral nonlinearity (INL), and ±1 LSB differential nonlinearity (DNL). It supports power-down modes reducing current consumption to 4 µA and ensures monotonic operation across the specified temperature range.

Feature Summary

• Dual-channel 12-bit resolution with ±1 LSB INL and ±1 LSB DNL
• 50 MHz SPI serial interface with daisy-chain and readback support
• User-selectable gain (×1 or ×2) via GAIN pin for 2.5 V or 5 V full-scale output
• Power-on reset circuit with RSTSEL pin for zero scale or midscale initialization

Applications

• Optical transceivers
• Base station power amplifiers
• Process control PLC I/O cards
• Industrial automation systems
• Data acquisition systems

Procurement Notes

Verify package configuration upon ordering; the BRUZ suffix denotes the 16-lead TSSOP variant. Confirm that the specific order code matches the required packaging format, as reel options may carry distinct suffixes. Ensure compatibility with 1.8 V logic levels if utilizing the VLOGIC pin for low-voltage microprocessor interfacing.

Selection Notes

Select this component when dual-channel 12-bit precision is required within a compact footprint. The external reference architecture necessitates an independent VREF source. Verify that the load capacitance requirements align with the stability limits of 2 nF (unloaded) or 10 nF (with 1 kΩ series resistance) to maintain phase margin.

Part Context

This part belongs to the AD5689/AD5687 nanoDAC+ family, sharing identical pinouts and functional blocks with the 16-bit AD5689. The primary distinction is the internal resolution: the AD5687 utilizes a 12-bit resistor-string architecture, whereas the AD5689 uses 16 bits. Both share the same TSSOP and LFCSP package options.

Replacement Considerations

The AD5689 serves as a higher-resolution substitute within the same package and pinout. For applications requiring an integrated internal reference, the AD5687R is the direct equivalent.