LTC2634IUD-HMX12#TRPBF

Overview

The LTC2634IUD-HMX12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a full-scale output of 4.096V and operates on a single 4.5V 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 communicates via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. This specific part number indicates a tape and reel packaging format with a power-on reset configuration set to mid-scale in external reference mode.

Feature Summary

• Quad 12-bit resolution with maximum integral nonlinearity error of ±2.5 LSB
• Integrated 4.096V full-scale reference with low drift of 10ppm/°C
• Rail-to-rail output buffers with ultralow crosstalk between DACs (2.4nV•s)
• Power-on reset to mid-scale in external reference mode (HMX suffix)

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive applications

Procurement Notes

Verify that the HMX ordering suffix correctly specifies the mid-scale power-on reset behavior for external reference configurations. 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 component when four independent 12-bit channels are required with high DC accuracy and low noise. Ensure the system supply voltage remains within the 4.5V to 5.5V range required for the 4.096V full-scale output variant. Verify compatibility with the 3-wire SPI interface timing requirements.

Part Context

This part belongs to the LTC2634 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The 'I' denotes the industrial temperature grade, while 'UD' specifies the 16-lead QFN package. The '#TRPBF' suffix confirms lead-free construction and tape-and-reel shipping quantities.

Replacement Considerations

LTC2634IUD-LMX12#TRPBF: Identical specifications with zero-scale power-on reset instead of mid-scale.

FAQ

What is the settling time for the LTC2634IUD-HMX12?

The typical settling time to ±1LSB (12-bit) is 4.2µs at VCC = 3V and 4.8µs at VCC = 5V.

How does the HMX suffix affect the power-on state?

The HMX suffix configures the device to reset to mid-scale upon power-up when operating in external reference mode.

What is the maximum clock rate for the serial interface?

The SPI/MICROWIRE compatible serial interface supports clock rates up to 50MHz.