LTC2654CGN-L12#TRPBF

Overview

The LTC2654CGN-L12#TRPBF 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 2.7V to 5.5V supply. The device provides a full-scale output of 2.5V internally or supports external references up to VCC/2. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 4.2µs for 12-bit accuracy, and a supply current of 1.7mA. It utilizes a 4-wire SPI/Microwire compatible interface with clock rates up to 50MHz.

Feature Summary

• Quad 12-bit resolution with guaranteed monotonicity over temperature
• Integrated precision reference with 10ppm/°C max temperature coefficient
• Rail-to-rail output buffers supporting 2.7V to 5.5V single supply operation
• SPI/Microwire compatible 4-wire serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify the TRPBF suffix indicates tape and reel packaging rather than tube. Confirm the CGN designation corresponds to the commercial temperature range (0°C to 70°C) and the 16-lead narrow SSOP package. Ensure the L12 suffix matches the required 12-bit resolution and 2.5V internal full-scale voltage configuration.

Selection Notes

Select this part for applications requiring four independent 12-bit outputs with low offset error (±2mV max). Choose the -L variant for 2.7V to 5.5V supply ranges; the -H variant requires 4.5V to 5.5V. Consider the GN package for standard PCB layouts or UF QFN for space-constrained designs. Verify if the ±1 LSB INL specification meets system linearity requirements.

Part Context

This component belongs to the LTC2654 family, which includes 16-bit variants (e.g., LTC2654BCGN-L16#PBF) offering higher resolution but potentially different power characteristics. The 12-bit version provides faster settling times and lower cost while maintaining high precision through the integrated reference. It serves as a direct replacement for older quad DACs requiring rail-to-rail output capabilities.

Replacement Considerations

Direct pin-compatible alternatives within the same package include other LTC2654 variants with different resolutions or temperature grades. Cross-model replacements may require interface verification, as some competitors use I2C instead of SPI.