LTC2631CTS8-LM12#TRPBF

Overview

The LTC2631CTS8-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 yielding 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 specifications include a maximum Integral Nonlinearity (INL) of ±1 LSB, a typical settling time of 4.1µs at 3V, and a low power consumption of 180µA at 3V with internal reference. It includes a power-on reset circuit configured to initialize the output to mid-scale.

Feature Summary

• Integrated 10ppm/°C precision reference providing 2.5V full-scale output
• 12-bit resolution with guaranteed monotonicity and ±1 LSB maximum INL
• I²C interface with selectable addresses and 400kHz clock rate capability
• Power-on reset option to mid-scale or zero-scale
• Low power operation: 180µA active current, down to 1.8µA in power-down mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems
• Optical networking

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging format. Confirm the temperature grade 'C' corresponds to the commercial range of 0°C to 70°C. Ensure the 'LM12' designation matches the required 2.5V full-scale voltage and mid-scale power-on reset configuration for the target application design.

Selection Notes

Select this component when a compact 12-bit DAC with an integrated high-accuracy reference is required in an 8-lead TSOT-23 footprint. The 'L' suffix denotes the 2.5V full-scale variant suitable for 2.7V–5.5V supplies, whereas 'H' variants support 4.096V but require higher voltages. The 'M' suffix ensures a mid-scale reset state upon power-up, which may be necessary for specific system initialization requirements compared to zero-scale options.

Part Context

This part belongs to the LTC2631 family of single-channel I²C DACs. It shares architectural similarities with multi-channel variants such as the LTC2633 (dual), LTC2635 (quad), and LTC2637 (octal). The specific model differs from the LTC2631A series by its accuracy grade, where the standard LTC2631A guarantees ±1 LSB INL, while other grades in the family may have wider linearity errors.

Replacement Considerations

Direct pin-compatible replacements within the same package and interface include other members of the LTC2631 family, such as the LTC2631CTS8-HM12#TRPBF for a 4.096V full-scale output or the LTC2631CTS8-LZ12#TRPBF for a zero-scale power-on reset. Verify that the replacement's temperature grade and INL specifications meet the original design constraints.