LTC2631ACTS8-LZ12#TRMPBF

Overview

The LTC2631ACTS8-LZ12#TRMPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum Integral Nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.1µs at VCC = 3V, and low power consumption of 180µA at 3V. The part incorporates a power-on reset circuit that defaults the output to zero-scale upon initialization.

Feature Summary

• 12-bit resolution with ±1 LSB maximum INL error
• Integrated 2.5V full-scale reference with 10ppm/°C drift
• I²C interface with selectable slave addresses via CA0/CA1 pins
• Power-on reset to zero-scale for consistent system startup

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable battery-powered equipment
• Automotive electronic modules

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity, distinct from the standard 2,500-piece TR configuration. Confirm the 'A' grade designation ensures the tighter ±1 LSB INL specification compared to standard grades. Ensure the 'L' suffix corresponds to the 2.7V–5.5V supply range and 2.5V full-scale output requirements for the target design.

Selection Notes

Select this component when a compact 8-lead TSOT-23 package is required alongside high DC accuracy (±1 LSB INL). The 'Z' power-on reset option is critical for applications requiring the DAC output to start at zero volts rather than mid-scale. Verify that the 2.5V internal reference range meets the signal swing needs, as the 'H' grade variant is necessary for 4.096V outputs.

Part Context

This part belongs to the LTC2631 family of single-channel DACs. The 'A' suffix denotes the highest accuracy grade within the series, guaranteeing ±1 LSB INL. The 'L' indicates the 2.5V full-scale version powered by a 2.7V minimum supply, while 'H' variants support 4.096V outputs with a higher minimum supply voltage of 4.5V.

Replacement Considerations

Direct pin-compatible substitutes within the same package include other LTC2631 variants such as LTC2631ACTS8-LM12#TRMPBF, which differs only in the power-on reset behavior (mid-scale vs. zero-scale). Cross-family replacements require verification of I²C compatibility and physical footprint constraints.