LTC2634IUD-LMI12#TRPBF

Overview

The LTC2634IUD-LMI12#TRPBF is a quad 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 2.5V full-scale output and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 85°C industrial temperature range, and a maximum integral nonlinearity error of ±2.5 LSB. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. This specific part number indicates a 16-lead QFN package, tape and reel packaging, and a power-on reset configuration that sets outputs to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• SPI/MICROWIRE compatible 3-wire serial interface operating up to 50MHz
• Power-on reset to mid-scale in internal reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive applications

Procurement Notes

Verify the #TRPBF suffix confirms tape and reel packaging containing 2,500 pieces. Confirm the I-grade designation matches the required -40°C to 85°C operating temperature range for the target application environment.

Selection Notes

Select this part for applications requiring four independent 12-bit channels with high accuracy and low noise. Ensure the system supply voltage remains within 2.7V to 5.5V. Choose this variant if mid-scale initialization upon power-up is preferred over zero-scale or high-impedance states.

Part Context

This component belongs to the LTC2634 family, which offers various resolutions (8, 10, and 12 bits) and package options (QFN and MSOP). The IUD suffix specifies the Industrial temperature grade and 16-lead QFN package, while LMI12 defines the 2.5V full-scale, mid-scale reset, and 12-bit resolution configuration.

Replacement Considerations

LTC2634CUD-LMI12#TRPBF: Identical electrical specifications but rated for Commercial temperature range (0°C to 70°C).

FAQ

What is the default output state after power-up?

The outputs reset to mid-scale (1.25V) when using the internal reference.

What is the maximum integral nonlinearity error?

The maximum INL error is ±2.5 LSB for the 12-bit version.

Does the QFN package support daisy-chain operation?

Yes, the QFN package includes an SDO pin that allows for daisy-chain communication.