LTC2617IDE-1#TRPBF

Overview

The LTC2617IDE-1#TRPBF is a dual 14-bit rail-to-rail voltage output digital-to-analog converter (DAC) in a 12-lead DFN package. It operates on a single supply of 2.7V to 5.5V and features an I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. The device includes built-in high-performance output buffers, double-buffered data latches, and an asynchronous DAC update pin (LDAC). This specific variant incorporates a power-on reset circuit that sets the voltage outputs to mid-scale upon initialization.

Feature Summary

• Dual 14-bit resolution with guaranteed monotonicity over temperature
• I²C interface with 27 selectable addresses via CA0, CA1, and CA2 pins
• Power-on reset to mid-scale for system consistency
• Ultralow crosstalk (30µV typical) and low power consumption (260µA per DAC at 3V)

Applications

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

Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging. Confirm the 'IDE' designation corresponds to the industrial temperature range (-40°C to 85°C). Ensure the '-1' suffix matches the required mid-scale power-on reset behavior for the application design.

Selection Notes

Select this part when a compact dual-channel solution is required. The 14-bit resolution offers a balance between precision and speed. Consider the -1 variant if mid-scale initialization is preferred over zero-scale. Verify I²C bus capacitance limits if operating in fast mode.

Part Context

This component belongs to the LTC2607/LTC2617/LTC2627 family, which shares identical pinouts and interfaces but differs in resolution (16, 14, and 12 bits respectively). The LTC2617 provides 14-bit performance within the same tiny 3mm × 4mm DFN footprint as its 16-bit counterpart.

Replacement Considerations

LTC2617IDE#TRPBF: Identical specifications except power-on reset defaults to zero scale instead of mid-scale.

FAQ

What is the default output state after power-up?

The LTC2617-1 variant resets the voltage outputs to mid-scale until a valid write and update command is executed.

How are the I²C slave addresses configured?

Addresses are selected by connecting the CA0, CA1, and CA2 pins to VCC, GND, or leaving them floating, providing 27 unique addresses plus a global address.

What is the function of the LDAC pin?

LDAC is an asynchronous DAC update pin. A falling edge updates the DAC register with the input register contents immediately, independent of the I²C clock.