LTC2642IMS-16#PBF

Overview

The Analog Devices LTC2642IMS-16#PBF is a 16-bit unbuffered voltage output digital-to-analog converter (DAC) housed in a 10-lead MSOP package. It operates from a single 2.7V to 5.5V supply 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 a maximum integral nonlinearity (INL) of ±1 LSB, differential nonlinearity (DNL) of ±1 LSB, and a settling time of 1µs to 16 bits. The DAC includes matched internal scaling resistors for bipolar operation with an external op amp, asynchronous clear functionality, and power-on reset to midscale.

Feature Summary

• 16-bit resolution with guaranteed monotonicity over temperature
• Unbuffered voltage output with low offset error of ±1 LSB
• Integrated bipolar scaling resistors for external amplifier configuration
• Asynchronous CLR pin clears DAC to midscale; Power-On Reset initializes to midscale

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring high precision
• Data acquisition systems needing low power consumption

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature grade. The IMS8 suffix denotes a 10-lead plastic MSOP package suitable for surface mount applications. Ensure compatibility with the required operating temperature range of -40°C to +85°C for the 'I' grade variant before procurement.

Selection Notes

Select this component when bipolar output swing is required using an external operational amplifier, leveraging the internal matched RFB and INV pins. For unipolar applications where midscale initialization is acceptable, this part serves as a direct alternative to the LTC2641. Consider the 6.2kΩ output resistance when calculating gain errors due to load impedance, ensuring loads exceed 60kΩ to maintain linearity specifications.

Part Context

This part belongs to the LTC2641/LTC2642 family of 16-/14-/12-bit VOUT DACs. The LTC2642 variant is distinguished by its 10-pin configuration and inclusion of internal bipolar scaling resistors, whereas the LTC2641 offers an 8-pin option for unipolar use only. Both families share identical serial interface protocols and core DAC architecture but differ in pinout and initial power-up states.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility if considering cross-family alternatives, particularly regarding the presence of RFB and INV pins for bipolar configurations.