AD5676ACPZ-RL

Overview

The AD5676ACPZ-RL is an octal, 16-bit buffered voltage output digital-to-analog converter (DAC) from Analog Devices. It features a serial peripheral interface (SPI) operating at clock rates up to 50 MHz with readback or daisy-chain capabilities. The device operates from a single 2.7 V to 5.5 V power supply and includes a user-selectable gain of 1 or 2 via the GAIN pin or gain bit. Key performance metrics include a maximum integral nonlinearity (INL) of ±3 LSB and a total unadjusted error (TUE) of ±0.14% of full-scale range. It supports 1.8 V logic compatibility and offers per-channel power-down modes reducing current consumption to typically 1 µA.

Feature Summary

• Octal 16-bit resolution with high relative accuracy (INL: ±3 LSB max).
• 50 MHz SPI interface with 1.8 V logic compatibility and readback/daisy-chain support.
• User-selectable output gain of 1x or 2x relative to VREF.
• Per-channel power-down mode reduces typical current consumption to 1 µA.

Applications

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

Procurement Notes

Verify the specific grade (A or B) required for the application, as specifications such as INL and offset error vary between grades. Confirm the package type matches the design; the ACPZ suffix indicates the LFCSP package, while ARUZ indicates TSSOP. Ensure the external reference voltage requirements align with the device's VREF input range and impedance characteristics.

Selection Notes

Select the appropriate gain setting based on the desired output voltage span relative to the reference voltage. Consider the thermal resistance values when designing the PCB layout, as heat dissipation affects reliability in the LFCSP package. Verify that the load capacitance does not exceed stability limits for the chosen resistive load conditions. Check if daisy-chain or readback functionality is needed to optimize microprocessor pin usage.

Part Context

The AD5676 belongs to the nanoDAC+ family, designed for low-power, high-accuracy applications. It complements other devices like the AD5675 (I2C interface) and AD5676R (internal reference). The ACPZ-RL designation specifies the LFCSP package and reel packaging format. This component serves as a bridge between digital control systems and analog actuators or sensors in industrial environments.

Replacement Considerations

For I2C interface replacement, consider the AD5675 series. For devices with internal references, the AD5676R is an option. The AD5672R provides 12-bit resolution with an internal reference. Ensure any substitute maintains the 16-bit resolution and octal channel count if those are critical constraints.