AD5721BRUZ

Overview

The AD5721BRUZ is a single-channel, 12-bit serial input voltage output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It operates from single supply voltages of +4.75 V to +30 V or dual supply voltages ranging from −16.5 V to 0 V on VSS and +4.75 V to +16.5 V on VDD. The device features an integrated output amplifier and reference buffer, supporting software-programmable output ranges including unipolar (0 V to +5 V, +10 V, +16 V, +20 V) and bipolar (±3 V, ±5 V, ±10 V, −2.5 V to +7.5 V). Key electrical specifications include a typical settling time of 7.5 μs, integral nonlinearity (INL) of ±0.5 LSB, differential nonlinearity (DNL) of ±0.5 LSB, and low noise spectral density of 35 nV/√Hz. It utilizes a DSP/microcontroller-compatible serial interface with clock rates up to 50 MHz.

Feature Summary

• 12-bit resolution with guaranteed monotonicity (±1 LSB max DNL) and high accuracy (±0.5 LSB max INL for B Grade).
• 8 software-programmable output ranges: 0 V to +5 V, +10 V, +16 V, +20 V, ±3 V, ±5 V, ±10 V, and −2.5 V to +7.5 V, with 5% overrange capability.
• Integrated output amplifier and reference buffer allowing direct connection to external references (2 V to 3 V range).
• Robust 4 kV HBM ESD rating and asynchronous updating via LDAC pin.

Applications

• Industrial automation systems
• Instrumentation and data acquisition equipment
• Open-loop and closed-loop servo control applications
• Process control systems
• Programmable logic controllers (PLCs)

Procurement Notes

Verify the specific grade and package configuration when ordering. The AD5721BRUZ denotes the B Grade version in a 16-lead TSSOP package. Confirm that the application requires an external reference voltage source, as this part does not contain an internal reference generator unlike the AD5721R series. Ensure power supply rails match the selected output range requirements.

Selection Notes

Select the AD5721BRUZ for applications requiring 12-bit resolution with high linearity and fast settling times. Choose this part over the AD5761 if lower resolution is sufficient but cost or power constraints exist. Verify that the system can provide an external reference voltage between 2 V and 3 V. Ensure the microcontroller interface supports SPI or compatible serial protocols with clock speeds up to 50 MHz.

Part Context

The AD5721BRUZ belongs to the AD5761/AD5721 family of DACs, which are pin-compatible with their 16-bit counterparts. The 'B' suffix indicates the B Grade performance level, offering tighter INL/DNL specifications compared to standard grades. The 'RUZ' suffix identifies the 16-lead TSSOP package with industrial temperature range coverage (-40°C to +125°C). This family is designed for universal solutions using integrated buffers.

Replacement Considerations

The AD5721BCPZ-RL7 is a pin-compatible alternative in a 16-lead LFCSP package with reel packaging. The AD5721RBRUZ offers similar functionality but includes an internal reference, changing the external circuit design requirements. Direct substitution requires verifying package dimensions and thermal characteristics.