AD5321BRTZ-500RL7

The AD5321BRTZ-500RL7 from Analog Devices is a single 12-bit, buffered, voltage-output digital-to-analog converter (DAC). It operates from a single 2.5 V to 5.5 V power supply and consumes a low 120 μA at 3 V, making it suitable for portable, battery-powered instruments.

This DAC utilizes a 2-wire, I2C-compatible serial interface that supports clock rates up to 400 kHz, allowing multiple devices to share the same bus. The on-chip output buffer amplifier enables rail-to-rail output swing with a slew rate of 0.7 V/μs. The reference for the DAC is derived directly from the power supply inputs, maximizing the dynamic output range. A power-on reset circuit ensures the output powers up to 0 V until a valid write occurs.

The device incorporates a power-down feature that reduces current consumption to 50 nA at 3 V and offers software-selectable output loads in power-down mode. The AD5321BRTZ-500RL7 is housed in a compact 6-lead SOT-23 package, suitable for surface mounting.

Key electrical specifications include a 12-bit resolution, a 2.5 V to 5.5 V operating voltage range, and a settling time of 10 µs. The integral nonlinearity (INL) is specified at ±2, ±0.3. The operating temperature range is -40°C to 105°C.