LTC2655IUF-H12#TRPBF

Overview

The LTC2655IUF-H12#TRPBF is a quad 12-bit rail-to-rail digital-to-analog converter (DAC) from Analog Devices, housed in a 20-lead 4mm × 4mm plastic QFN package. It features an integrated reference providing a full-scale output of 4.096V and operates on a single 4.5V 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) error of ±1 LSB, a settling time of 3.9µs for 12-bit accuracy, and guaranteed monotonicity over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Quad 12-bit resolution with rail-to-rail voltage output buffers
• Integrated 4.096V full-scale reference with 10ppm/°C max temperature coefficient
• Guaranteed monotonic operation over the full operating temperature range
• Ultralow crosstalk between DAC channels (<1nV•s)

Applications

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

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the specific temperature grade 'I' matches the environmental requirements of the target application, as this variant supports the industrial range of –40°C to 85°C. Ensure the power supply rails strictly adhere to the 4.5V to 5.5V specification for the -H option to maintain performance integrity.

Selection Notes

Select the LTC2655IUF-H12#TRPBF when a quad channel configuration with 12-bit precision and a 4.096V internal reference is required. This part is suitable for designs needing rail-to-rail outputs and low crosstalk. If a wider supply voltage range starting at 2.7V is needed, or if a 2.5V full-scale output is preferred, consider the -L option variants instead. Verify that the I²C address pins (CA0-CA2) can be configured to avoid bus conflicts in multi-device systems.

Part Context

This component belongs to the LTC2655 family of quad DACs, which also includes 16-bit versions and commercial temperature grade options. The 'I' designation indicates the industrial temperature rating, while 'H' specifies the 4.096V internal reference configuration. The 'UF' code denotes the 20-lead QFN package, distinguishing it from the 16-lead SSOP alternative. The '#TRPBF' suffix confirms lead-free construction and tape-and-reel delivery.

Replacement Considerations

Direct substitutes within the same package and pinout include other LTC2655 variants such as the LTC2655IUF-L12#TRPBF for different reference voltages or the LTC2655BIUF-H12#TRPBF for higher linearity grades. Cross-family replacements like the LTC2657 offer octal configurations but require interface verification.