LTC2655IGN-L12#PBF

Overview

The LTC2655IGN-L12#PBF is a quad 12-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead narrow SSOP package. It features an integrated reference with a maximum temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and utilizes 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. The part is guaranteed monotonic over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Quad 12-bit resolution with integrated 10ppm/°C max reference and 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s) between channels
• I²C interface with selectable power-on reset to zero-scale or mid-scale via PORSEL pin
• Industrial temperature grade (–40°C to 85°C) in a compact 16-lead narrow SSOP package

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging. Confirm that the IGN designation corresponds to the Industrial temperature range and GN package type. Ensure compatibility with the required I²C bus speed and supply voltage levels before integration into the design.

Selection Notes

Select this model for applications requiring four independent 12-bit DAC channels with high precision and low noise. The -L suffix denotes the 2.5V internal reference option, suitable for 2.7V to 5.5V supply ranges. Compare against the -H variant if a 4.096V output span is needed, noting the higher minimum supply voltage requirement of 4.5V for that version.

Part Context

This component belongs to the LTC2655 family of quad DACs, which also includes 16-bit variants (e.g., LTC2655IGN-L16) and commercial temperature grades (C-grade). The L12 designation specifically identifies the 12-bit resolution version within the -L (2.5V reference) sub-family. It shares the same pinout and interface as other members but offers different linearity and resolution characteristics.

Replacement Considerations

Direct substitutes within the same family include LTC2655CGN-L12#PBF for commercial temperature operation. For 16-bit resolution requirements, consider LTC2655IGN-L16#PBF. External replacements must match the 16-lead SSOP package, I²C interface, and supply voltage constraints.