AD7305BR

Overview

The AD7305BR is a quad, 8-bit digital-to-analog converter (DAC) featuring a parallel interface. It operates from single +3 V to +5 V or ±5 V supplies, consuming less than 9 mW at 3 V. The device includes internal precision buffers with rail-to-rail output swing and a reference input range covering both supply rails. Key specifications include an 8-bit resolution, 1 µs settling time to ±0.1% full scale, and ±1 LSB maximum integral and differential nonlinearity. It supports a 2.6 MHz reference multiplying bandwidth and features a hardware shutdown mode drawing 40 µA.

Feature Summary

• Quad 8-bit DAC architecture with R-2R ladder design
• Parallel data interface with standard address decode and WR control
• Rail-to-rail buffered outputs and reference input capability
• Internal power-on reset for zero-scale initialization

Applications

• Automotive output span voltage control
• Instrumentation digitally controlled calibration
• Pin-compatible replacement for AD7226 when VDD < 5.5 V

Procurement Notes

Verify the specific package suffix against the manufacturer's ordering guide to confirm pinout and thermal characteristics. Ensure the selected variant matches the required operating temperature range, as industrial and automotive grades are available. Confirm RoHS compliance status for the specific manufacturing lot before integration into production designs.

Selection Notes

Select the AD7305BR over the AD7304 when a parallel interface is preferred over the serial SPI-compatible option. This component is suitable for applications requiring simultaneous updates of multiple channels via the LDAC strobe. Verify that the system logic levels align with the specified VIH and VIL thresholds for reliable data transfer.

Part Context

The AD7305BR belongs to the AD7304/AD7305 family of low-power, quad 8-bit DACs manufactured by Analog Devices. These devices are designed for cost-sensitive applications requiring multiple analog outputs in a compact surface-mount package. The BR suffix typically denotes the wide-body SOIC package variant within this product line.

Replacement Considerations

The AD7305 is explicitly documented as a pin-compatible replacement for the AD7226 when operating with VDD less than 5.5 V. Designers should verify that the AD7226's performance requirements are met by the AD7305's specifications, particularly regarding settling time and linearity.