LTC2642AIMS-16#PBF

Overview

The LTC2642AIMS-16#PBF is a 16-bit unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7V to 5.5V supply with a typical current consumption of 120µA. The device features a 3-wire SPI/Microwire compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include ±0.5LSB DNL, ±2LSB gain error, and a settling time of 1µs to 16 bits. It is housed in a 10-lead MSOP package and guaranteed monotonic over the industrial temperature range of -40°C to +85°C.

Feature Summary

• 16-bit resolution with ±0.5LSB differential nonlinearity (DNL) and ±2LSB gain error
• Unbuffered voltage output capable of driving loads greater than 60kΩ
• Integrated bipolar scaling resistors for external op amp configuration
• Power-on reset circuit initializes DAC output 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 component marking code 'LTCZZ' and the 10-lead MSOP package format upon receipt. Confirm that the operating environment remains within the specified -40°C to +85°C range to maintain guaranteed monotonicity and linearity specifications. Ensure proper handling of the unbuffered output pin to prevent leakage currents that could degrade performance.

Selection Notes

Select this part when bipolar output capability is required alongside 16-bit accuracy. Unlike the LTC2641, the LTC2642 includes internal matched resistors for bipolar operation. Designers must account for the 6.2kΩ output resistance when calculating gain errors under load. Verify that the system's reference voltage falls between 2V and VDD to ensure correct full-scale output ranges.

Part Context

This component belongs to the LTC2641/LTC2642 family of low-power DACs. The 'A' suffix indicates enhanced linearity specifications compared to standard grade parts. The 'IMS' designation specifies the 10-lead MSOP package and industrial temperature rating. It serves as the bipolar counterpart to the LTC2641, which lacks internal bipolar scaling resistors.

Replacement Considerations

The LTC2642IMS-16#PBF is a direct functional substitute with identical specifications and pinout. For applications not requiring bipolar output, the LTC2641AIMS-16#PBF may be used, though it lacks the RFB and INV pins.