AD8801ARZ-REEL

Overview

The AD8801ARZ-REEL is an octal 8-bit TrimDAC manufactured by Analog Devices Inc. It provides eight individually programmable DC voltage outputs in a 16-pin SOIC package with reel packaging. The device operates on a single +3 V to +5 V supply and features a three-wire serial interface for microcontroller control. Key specifications include a settling time of 600 ns, power dissipation of 27.5 μW, and integral nonlinearity error of ±0.5 LSB. The AD8801 variant includes a midscale preset function via the RS pin.

Feature Summary

• Octal 8-bit resolution with eight independently programmable voltage outputs
• Three-wire serial input interface (CS, CLK, SDI) compatible with standard logic families
• Power shutdown mode reduces current consumption to ≤25 mW while maintaining latch settings
• Midscale preset capability activated by the RS pin for simplified initial power-up conditions

Applications

• Trimmer potentiometer replacement in new designs
• Video and audio equipment gain and offset adjustment
• Geometric correction and automatic adjustment in CRT computer graphic displays
• Portable and battery-operated equipment requiring low power consumption

Procurement Notes

Verify that the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the specific revision level matches design requirements as datasheets may undergo updates. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input structure.

Selection Notes

Select the AD8801ARZ-REEL over the AD8803 variant if a fixed zero-scale voltage (GND) is acceptable, as the AD8801 lacks a VREFL pin. Verify that the required output voltage range fits within the VDD supply limits since the AD8801 cannot offset the lower bound. Ensure the serial interface timing meets the setup and hold time requirements of the host microcontroller.

Part Context

This component belongs to the AD8801/AD8803 TrimDAC family designed to replace mechanical potentiometers. It shares architectural similarities with the AD8802 and AD8804, which offer twelve channels and different pinouts. The device utilizes an R-2R ladder architecture with digital control logic for precise voltage setting.

Replacement Considerations

Public confirmed substitute part numbers: None identified.