AD7801BRUZ-REEL7

Overview

The AD7801BRUZ-REEL7 is a single-channel, 8-bit voltage output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It operates from a single +2.7 V to +5.5 V supply and features an on-chip precision output buffer that enables rail-to-rail output swing. The device utilizes a parallel microprocessor and DSP-compatible interface with double-buffered logic for synchronous or automatic updates. Key electrical parameters include a maximum settling time of 2 µs, ±1 LSB relative accuracy, and ±1 LSB differential nonlinearity. Power consumption is typically 5 mW at 3.3 V, reducing to less than 1 µA in power-down mode. The component is housed in a 20-lead TSSOP package.

Feature Summary

• Single 8-bit DAC with rail-to-rail voltage output capability
• Parallel interface compatible with standard microprocessors and DSPs
• Internal or external reference selection via REFIN pin
• Power-down mode reduces current consumption to <1 µA

Applications

• Portable battery-powered instruments
• Digital gain and offset adjustment circuits
• Programmable voltage and current sources
• Programmable attenuators

Procurement Notes

Verify the specific ordering suffix RU-20 corresponds to the 20-lead Thin Shrink Small Outline package. Confirm the B version temperature range of -40°C to +105°C matches application requirements. Ensure ESD precautions are observed during handling as the device is electrostatic sensitive. Check datasheet specifications for absolute maximum ratings to prevent damage.

Selection Notes

Select this component when a low-power, single-supply 8-bit DAC with rail-to-rail output is required. The internal reference simplifies design if an external reference is not needed. Verify that the parallel interface timing meets the system's microprocessor or DSP constraints. Consider the 20-TSSOP package dimensions for PCB layout compatibility.

Part Context

The AD7801BRUZ-REEL7 belongs to the AD7801 family of 8-bit DACs. The 'BRU' designation indicates the B grade temperature range (-40°C to +105°C) and the RU package option (20-lead TSSOP). The '-REEL7' suffix denotes tape and reel packaging for automated assembly. This part is distinct from other ADI converters like the AD7914 (ADC) or AD7829 (multi-channel ADC).

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and electrical parameter compatibility before substituting with other 8-bit DACs.