LTC2631CTS8-LM12#TRMPBF

Overview

The LTC2631CTS8-LM12#TRMPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features an integrated precision reference with a full-scale output of 2.5V and operates from 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 characteristics include a maximum Integral Nonlinearity (INL) error of ±2.5 LSBs, a typical settling time of 4.1µs at ±1LSB, and a power consumption of 180µA at 3V. The unit incorporates a power-on reset circuit configured to initialize the output to mid-scale upon power-up.

Feature Summary

• 12-bit resolution with ±2.5 LSB maximum INL error
• Integrated 2.5V full-scale reference with 10ppm/°C temperature coefficient
• I²C interface with selectable addresses via CA0/CA1 pins
• Power-on reset to mid-scale option (suffix 'M')
• Rail-to-rail buffered output guaranteed monotonic over temperature

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive applications
• Optical networking devices

Procurement Notes

Verify the specific ordering suffixes against the manufacturer's datasheet to confirm package type, temperature grade, and power-on reset behavior. The '#TRMPBF' suffix indicates a 500-unit tape and reel packaging format with lead-free finish. Confirm that the C-grade commercial temperature range (0°C to 70°C) aligns with the operational requirements of the target application environment.

Selection Notes

Select this component when a compact 12-bit DAC with an internal reference is required for space-constrained designs. The LM12 designation specifies a 2.5V full-scale output and mid-scale reset, suitable for bipolar signal applications requiring a defined initial state. Ensure the supply voltage remains within the 2.7V to 5.5V range for specified performance. For higher accuracy needs, consider the A-grade variant which offers ±1 LSB INL.

Part Context

This part belongs to the LTC2631 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The family distinguishes between L-grade (2.5V FS, 2.7V-5.5V supply) and H-grade (4.096V FS, 4.5V-5.5V supply) variants. The LTS8 package denotes the 8-lead TSOT-23 form factor. Other suffixes include Z for zero-scale reset and different temperature grades such as I (-40°C to 85°C) and H (-40°C to 125°C).

Replacement Considerations

Direct pin-for-pin replacements within the same family include LTC2631CTS8-LZ12#TRMPBF (zero-scale reset) or LTC2631ITS8-LM12#TRMPBF (industrial temperature grade). Cross-family alternatives like the LTC2632 (dual channel) require software adaptation but share the same interface.