LTC2657CFE-H12#TRPBF

Overview

The LTC2657CFE-H12#TRPBF is an octal, 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features a thermally enhanced 20-lead TSSOP package and operates within a supply voltage range of 4.5V to 5.5V. The device integrates a precision reference with a maximum temperature coefficient of 10ppm/°C, establishing a full-scale output voltage of 4.096V. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1 LSB, guaranteed monotonicity, and a settling time of 3.5µs for a 12-bit resolution step. The component utilizes a 2-wire I²C compatible serial interface supporting clock rates up to 400kHz.

Feature Summary

• Octal architecture providing eight independent 12-bit DAC channels in a single package
• Integrated precision reference yielding a 4.096V full-scale output with ≤10ppm/°C temperature coefficient
• Rail-to-rail buffered outputs with ultralow crosstalk of 0.8nV•s between channels
• Configurable power-on reset allowing selection between zero-scale or mid-scale initialization

Applications

• Mobile communications systems requiring multi-channel signal generation
• Process control and industrial automation instrumentation
• Automatic test equipment utilizing precise voltage references
• Automotive electronic control units demanding high reliability

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging rather than tube shipping. Confirm the CFE designation corresponds to the 20-lead thermally enhanced TSSOP package variant. Ensure the H12 suffix matches the required 4.5V minimum supply voltage and 4.096V full-scale output specification for the target application design.

Selection Notes

Select this part when eight isolated DAC channels are required within a compact footprint. The H-option internal reference necessitates a supply voltage of at least 4.5V; use the L-option if operation below 4.5V is required. Verify that the ±1 LSB INL specification meets system accuracy requirements compared to the ±4 LSB grade available in other variants.

Part Context

This component belongs to the LTC2657 family of octal DACs, which also includes 16-bit resolution variants and alternative package options such as the 20-lead QFN. The CFE-H12 configuration specifically targets applications needing 12-bit accuracy with a higher voltage swing capability provided by the integrated 4.096V reference source.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2657IFE-H12#TRPBF for industrial temperature ranges (-40°C to 85°C) and the LTC2657CUFD-H12#TRPBF for QFN packaging. Cross-referencing datasheets is necessary to confirm identical pinout and electrical characteristics.