LTC2642IMS-14#PBF

Overview

The LTC2642IMS-14#PBF is a single-channel, 14-bit unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices. It operates on a single supply of 2.7V to 5.5V and consumes 120µA typical supply current. The device features a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include ±0.5 LSB INL and DNL, a settling time of 1µs to 16-bit accuracy, and a glitch impulse of 0.5nV·sec. It is housed in a 10-lead MSOP package and supports bipolar operation via internal matched scaling resistors.

Feature Summary

• 14-bit resolution with ±0.5 LSB INL and DNL over temperature
• Unbuffered voltage output with 120µA supply current
• Bipolar capability using internal matched scaling resistors for external op amp configuration
• Power-on reset clears DAC output to midscale

Applications

• Process control and industrial automation
• Automatic test equipment
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix matches the required package and temperature grade. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure the component source is traceable to Analog Devices Inc. to avoid counterfeit parts.

Selection Notes

Select this model for applications requiring 14-bit precision with low power consumption. The IMS suffix indicates a 10-lead MSOP package suitable for space-constrained designs. The -14 designation specifies 14-bit resolution. Consider the unbuffered output impedance when driving loads; ensure load resistance exceeds 60kΩ to maintain linearity without degrading INL/DNL performance.

Part Context

This part belongs to the LTC2641/LTC2642 family of high-resolution DACs. The LTC2642 variant specifically includes internal matched scaling resistors (RFB and INV) to facilitate bipolar output swings when used with an external operational amplifier, distinguishing it from the unipolar-only LTC2641.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical specifications if considering alternative manufacturers.