AD7809BSTZ-REEL

Overview

The AD7809BSTZ-REEL is an octal 10-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features parallel loading capabilities and operates from a +3.3 V to +5 V power supply with an on-chip reference. The device incorporates double-buffered data inputs for simultaneous analog output updates via the asynchronous LDAC input. Key electrical parameters include a maximum settling time of 4 ms, a typical current consumption of 12 mA in normal mode, and a maximum power dissipation of 99 mW. It supports both two's complement and offset binary input coding schemes.

Feature Summary

• Octal configuration providing eight independent 10-bit DAC channels within a single package.
• Parallel load interface utilizing DB0-DB9 data lines, WR, CS, and address pins A0-A2.
• Integrated system control register enabling global power-down, standby, and clear functions.
• On-chip Sub DAC allows individual channel transfer function shifting around the VBIAS point.

Applications

• Optical disk drives
• Instrumentation and communication systems
• Process control and voltage setpoint control
• Trim potentiometer replacement
• Automatic calibration

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm the presence of the REEL suffix indicates tape-and-reel packaging containing 1500 units. Ensure handling procedures account for electrostatic discharge sensitivity as specified in the datasheet. Validate that the B-grade accuracy meets the specific application requirements before integration.

Selection Notes

Select this model when multiple isolated analog outputs are required in a compact form factor. The parallel interface is suitable for microcontrollers or FPGAs with sufficient GPIO availability. Consider the 4 ms settling time for applications requiring moderate update rates. Verify that the 2 kΩ minimum load resistance aligns with the downstream circuit impedance.

Part Context

This component belongs to the AD780x family of low-power CMOS DACs. It is the octal variant of the AD7805 quad DAC. The BSTZ suffix denotes the TQFP-44 surface-mount package and RoHS compliance. It serves as a high-channel-count alternative to single or dual DAC solutions in multi-channel signal generation tasks.

Replacement Considerations

Public confirmed substitute part numbers: AD7809BST, AD7809BRZ.