AD5687RBCPZ-RL7

Overview

The AD5687RBCPZ-RL7 is a dual, 12-bit buffered voltage output digital-to-analog converter (DAC) from the nanoDAC+ family. It integrates a 2.5 V internal reference with a typical drift of 2 ppm/°C and operates on a single 2.7 V to 5.5 V supply. The device features an SPI interface supporting up to 50 MHz clock rates, user-selectable gain of 1 or 2 via the GAIN pin, and power-down modes reducing current to 4 μA at 3 V. It provides high drive capability of 20 mA, low glitch impulse of 0.5 nV-sec, and total unadjusted error (TUE) of ±0.1% FSR maximum. The component is housed in a compact 3 mm × 3 mm 16-lead LFCSP package.

Feature Summary

• Dual 12-bit resolution with ±1 LSB INL and ±1 LSB DNL
• Integrated 2.5 V reference with 2 ppm/°C typical temperature coefficient
• User-selectable gain (×1 or ×2) for full-scale outputs of 2.5 V or 5 V
• 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 the specific suffix RL7 corresponds to the reel packaging format required for production integration. Confirm that the B grade accuracy specifications meet the design requirements for integral nonlinearity and offset errors. Ensure the LFCSP-16 thermal management strategy aligns with the specified junction temperature limits during operation.

Selection Notes

Select this model when a dual-channel DAC with integrated precision reference is required. The AD5687R is suitable for applications needing 12-bit accuracy with low drift. Consider the GAIN pin configuration to determine if the 2.5 V or 5 V output span is necessary. Verify logic voltage compatibility with the VLOGIC pin range of 1.62 V to 5.5 V for the host microprocessor interface.

Part Context

This component belongs to the AD5689R/AD5687R nanoDAC+ family, which shares identical pinouts and functional blocks but differs in resolution. The AD5689R offers 16-bit resolution, while the AD5687R provides 12-bit resolution. Both devices utilize the same 16-lead LFCSP and TSSOP packages and support similar SPI communication protocols and power-down features.

Replacement Considerations

The AD5687RBCPZ can serve as a direct replacement for the AD5687BCPZ-RL7 if the external reference version is not required, provided the internal reference meets system drift specifications. Verify package compatibility and ensure the absence of the 'R' suffix does not alter the electrical characteristics relative to the original design intent.