LTC2657IFE-L12#PBF

Overview

The LTC2657IFE-L12#PBF is an octal 12-bit digital-to-analog converter (DAC) from Analog Devices, housed in a 20-lead thermally enhanced TSSOP package. It features an integrated 1.25V reference yielding a 2.5V full-scale output and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity, and a 400kHz I²C interface. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 3.9µs for ±1 LSB accuracy, and a typical power consumption of 3.1mA with the internal reference active.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels
• Integrated 1.25V reference providing 2.5V full-scale output range
• Ultralow crosstalk between channels (0.8nV·s typical)
• Selectable power-on reset to zero-scale or mid-scale via PORSEL pin

Applications

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

Procurement Notes

Verify the specific suffix 'IFE' corresponds to the Industrial temperature grade (-40°C to 85°C) and the 'L12' designation for the 2.5V full-scale/12-bit resolution configuration. Confirm the '#PBF' lead-free status matches project requirements. Cross-reference the manufacturer's latest datasheet for any potential product change notifications affecting pinout or electrical characteristics.

Selection Notes

Select this component when multiple low-channel-count DACs are needed in a compact footprint. The -L option is suitable for single-supply applications requiring operation down to 2.7V. Ensure the system load does not exceed the specified short-circuit current limits. For higher precision requirements, consider the B-grade variant which offers tighter INL specifications compared to standard grades.

Part Context

This part belongs to the LTC2657 family of octal DACs. The 'I' indicates the industrial temperature range, while 'FE' specifies the 20-lead TSSOP package. The 'L12' suffix denotes the 2.5V full-scale voltage derived from the internal 1.25V reference and 12-bit resolution. Other variants include the H-option for 4.096V full-scale and UFD package options.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2657BCFE-L12#PBF (Commercial grade) or the LTC2657BIFE-L12#PBF (Industrial grade with tighter linearity specs). Verify that the alternative grade meets the thermal and accuracy requirements of the design.