LTC2642IMS-14#TRPBF

Overview

The LTC2642IMS-14#TRPBF is a 14-bit unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices, housed in a 10-lead MSOP package. It operates on a single supply of 2.7V to 5.5V with a typical supply current of 120µA. The device features a 3-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include ±0.5 LSB DNL and INL errors, a 1µs settling time, and a glitch impulse of 0.5nV·sec. The part is guaranteed monotonic over temperature and includes an asynchronous CLR pin for clearing the DAC output to midscale.

Feature Summary

• 14-bit resolution with ±0.5 LSB DNL/INL linearity errors
• Unbuffered voltage output driving loads >60kΩ directly
• 3-wire serial interface with 50MHz SCLK capability
• Power-on reset clears output to midscale; CLR pin available

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring precise analog generation
• Data acquisition systems needing low-power conversion

Procurement Notes

Verify that the #TRPBF suffix indicates tape and reel packaging rather than tube packaging. Confirm the IMS designation corresponds to the 10-lead MSOP package variant. Ensure the ordering code matches the specific 14-bit resolution requirement within the LTC2642 family.

Selection Notes

Select this model when bipolar operation with external amplification is required, as the LTC2642 includes internal scaling resistors for RFB and INV connections. Choose the 14-bit version if system accuracy requirements are met by ±0.5 LSB error margins while optimizing cost compared to the 16-bit variants. Ensure the load impedance exceeds 60kΩ to maintain specified linearity without buffering.

Part Context

This component belongs to the LTC2641/LTC2642 family of high-resolution DACs. The LTC2642 variant specifically supports bipolar output configurations via matched internal resistors, distinguishing it from the unipolar-only LTC2641. The IMS package option provides a compact surface-mount solution suitable for space-constrained designs.

Replacement Considerations

Public confirmed substitute part numbers: LTC2642IMS-16#TRPBF, LTC2642IMS-12#TRPBF.