LTC2654IGN-L12#PBF

Overview

The LTC2654IGN-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 and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a 4-wire SPI/Microwire compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a settling time of 4.2µs, a maximum integral nonlinearity (INL) error of ±1 LSB, and a typical offset error of ±1mV. The outputs are 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
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• SPI/Microwire compatible 4-wire serial interface up to 50MHz
• Power-on reset configurable to zero-scale or mid-scale via PORSEL pin

Applications

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

Procurement Notes

Verify the specific ordering suffix IGN-L12#PBF against the manufacturer's current product selector guide to confirm availability and lead times. Ensure the component meets RoHS compliance requirements for the target assembly process. Cross-reference the datasheet revision date with the production batch to ensure consistency in electrical characteristics and packaging details.

Selection Notes

Select this part when a quad-channel DAC with 12-bit precision and low power consumption is required. The -L suffix indicates a full-scale output of 2.5V with an internal reference, suitable for 2.7V to 5.5V supply ranges. Choose the -H suffix if a 4.096V full-scale output is needed, requiring a 4.5V to 5.5V supply. Verify that the SSOP-16 package fits the PCB footprint constraints compared to the QFN alternative.

Part Context

This component belongs to the LTC2654 family of precision DACs, which also includes 16-bit variants (LTC2654B/LTC2654) and different package options like the 20-lead QFN. The IGN-L12 designation specifically identifies the industrial temperature grade (-40°C to +85°C), 12-bit resolution, and narrow SSOP packaging. It serves as a cost-effective solution for applications requiring multiple analog outputs without external reference components.

Replacement Considerations

Direct replacements within the same family include the LTC2654CGN-L12#PBF for commercial temperature range applications. For higher precision needs, the 16-bit LTC2654BCGN-L12#PBF or LTC2654BIGN-L12#PBF offer improved linearity at the cost of slightly higher power consumption. Ensure pin compatibility and software register mapping remain consistent during substitution.