LTC2631ITS8-LM12#TRPBF

Overview

The LTC2631ITS8-LM12#TRPBF is a single 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in an 8-lead TSOT-23 package. It features an integrated precision reference providing a 2.5V full-scale output 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 characteristics include a maximum Integral Nonlinearity (INL) of ±1 LSB, a typical settling time of 4.1µs at 12-bit resolution, and a low power consumption of 180µA at 3V. The part includes a power-on reset circuit configured to initialize the output to mid-scale.

Feature Summary

• 12-bit resolution with ±1 LSB maximum INL error
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• 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 ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging format. Confirm the 'I' grade corresponds to the industrial temperature range of –40°C to 85°C. Ensure the 'M' suffix is correctly identified as the power-on reset to mid-scale configuration. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm lead-free status and RoHS compliance before procurement.

Selection Notes

Select this component when a compact 12-bit DAC with high accuracy (±1 LSB INL) is required in a small TSOT-23 footprint. Choose the 'L' variant for 2.5V full-scale operation with a 2.7V minimum supply, as opposed to the 'H' variant which requires 4.5V minimum for 4.096V output. The 'M' suffix is necessary if system initialization requires a mid-scale output upon power-up rather than zero-scale. Verify that the I²C address configuration via CA0 and CA1 pins meets the bus addressing requirements.

Part Context

This part belongs to the LTC2631 family of single-channel voltage-output DACs. The specific model combines the 12-bit resolution ('12'), Industrial temperature grade ('I'), TSOT-23 package ('TS8'), Internal Reference mode ('L' for 2.5V), Mid-scale reset ('M'), and Tape & Reel packaging ('TRPBF'). Other variants in the family offer different resolutions (8-bit, 10-bit), full-scale voltages (4.096V), or reset behaviors (Zero-scale).

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2631ITS8-LZ12#TRPBF (Zero-scale reset) or LTC2631ITS8-HM12#TRPBF (4.096V full-scale, higher supply requirement). For lower accuracy needs, LTC2631ITS8-LM10#TRPBF (10-bit) may be considered. Ensure any substitute matches the specific power-on reset behavior and supply voltage constraints.