LTC2655IGN-L12#TRPBF

Overview

The LTC2655IGN-L12#TRPBF is a quad 12-bit digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead narrow SSOP package. It features an integrated 10ppm/°C maximum reference, providing a full-scale output of 2.5V with a supply range of 2.7V to 5.5V. The device includes high-performance rail-to-rail output buffers and is guaranteed monotonic over temperature. Communication is handled via a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a settling time of 3.9µs for ±1LSB accuracy, a maximum integral nonlinearity (INL) error of ±1LSB, and a gain error of ±0.02%FSR.

Feature Summary

• Quad 12-bit resolution with integrated 2.5V reference and rail-to-rail output buffers
• I²C compatible serial interface with selectable standard (100kHz) or fast (400kHz) clock rates
• Guaranteed monotonic operation over the full operating temperature range
• Power-on reset circuit configurable to zero-scale or mid-scale via the PORSEL pin

Applications

• Mobile communications systems
• Process control and industrial automation
• Instrumentation equipment
• Automatic test equipment
• Automotive applications

Procurement Notes

Verify that the specific part number corresponds to the Industrial temperature grade (-40°C to 85°C) as indicated by the 'I' suffix in the base model. Confirm the 'GN' package designation matches the required 16-lead narrow SSOP form factor. Ensure the '#TRPBF' suffix indicates the Tape and Reel packaging format with lead-free finish. Cross-reference the datasheet revision date to confirm the validity of the electrical characteristics provided.

Selection Notes

Select this component when a quad-channel DAC with I²C connectivity and low power consumption is required. The -L option provides a 2.5V full-scale output suitable for single-supply operation down to 2.7V. For higher voltage swings, consider the -H variant which offers a 4.096V full-scale output but requires a minimum supply of 4.5V. Verify that the system's I²C bus speed does not exceed the specified 400kHz limit and that the address pins (CA0-CA2) can be configured to avoid bus conflicts.

Part Context

This part belongs to the LTC2655 family of quad DACs, which also includes 16-bit variants (LTC2655B/LTC2655) and different package options such as the 20-lead QFN (UF). The IGN-L12 designation specifically identifies the Industrial temperature grade, Narrow SSOP package, and 12-bit resolution with the lower voltage internal reference option.

Replacement Considerations

Direct pin-compatible replacements within the same package include other members of the LTC2655 family, such as the LTC2655CGN-L12#TRPBF for Commercial temperature grade or LTC2655BCGN-L12#TRPBF for higher accuracy grades. Note that switching between -L and -H options changes the supply voltage requirements and full-scale output range.