AD5765BSUZ

Overview

The AD5765BSUZ is a quad, 16-bit, high-accuracy digital-to-analog converter (DAC) in a 32-lead TQFP package. It operates from ±4.75 V to ±5.25 V analog supplies and a 2.7 V to 5.25 V digital supply. The device features integrated output amplifiers with a nominal full-scale range of ±4.096 V, programmable via coarse gain registers to ±4.201 V or ±4.311 V. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB for the C grade, a settling time of 10 μs maximum, and an output noise spectral density of 70 nV/√Hz. It supports a serial interface clocking up to 30 MHz and includes on-chip die temperature sensing.

Feature Summary

• Quad 16-bit architecture with simultaneous updating via LDAC
• Integrated reference buffers and output amplifiers
• Digital offset and gain adjustment registers per channel
• On-chip die temperature sensor and programmable short-circuit protection

Applications

• Industrial automation systems
• Open- and closed-loop servo control
• Process control instrumentation
• Data acquisition systems
• Automatic test equipment

Procurement Notes

Verify the suffix 'SUZ' corresponds to the 32-lead TQFP package variant as listed in the ordering guide. Confirm the specific grade (B or C) required for INL specifications, as the base part number may denote the family while the suffix defines the package and performance tier. Ensure power supply rails match the ±5 V requirement for specified performance.

Selection Notes

Select the AD5765BSUZ when a quad-channel solution with integrated buffering is required to minimize external component count. The C grade offers guaranteed ±1 LSB INL, suitable for high-precision applications. Consider the ±4.096 V nominal output range against the load requirements; if higher voltage spans are needed, utilize the coarse gain register settings. Verify DVCC compatibility with the host microcontroller logic levels.

Part Context

The AD5765 belongs to the AD576x family of serial input DACs. It is related to the AD5764 (±10 V output) and AD5763 (dual channel). The 'S' indicates surface mount packaging, 'U' denotes the TQFP form factor, and 'Z' signifies lead-free compliance. This specific part integrates iCMOS process technology for improved AC and DC performance compared to earlier generations.

Replacement Considerations

The AD5763 serves as a dual-channel alternative within the same family. For ±10 V output requirements, the AD5764 is the compatible quad-channel replacement. Both share the same serial interface protocol and pinout structure, facilitating design upgrades without significant schematic changes.