LTC2637IMS-HZ12#TRPBF

Overview

The LTC2637IMS-HZ12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. 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 utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 85°C industrial temperature range, and a power-on reset circuit configured to zero-scale in internal reference mode.

Feature Summary

• Octal architecture with 12-bit resolution and ±2.5 LSB maximum INL error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• I2C interface with selectable internal or external reference input

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems
• Optical networking

Procurement Notes

Verify the #TRPBF suffix indicates a tape and reel quantity of 2500 pieces. Confirm the IMS package designation corresponds to the 16-lead MSOP form factor. Ensure the H-grade specification aligns with the required 4.5V to 5.5V supply voltage range for the 4.096V full-scale output configuration.

Selection Notes

Select this part when eight independent 12-bit channels are required in a compact surface-mount package. The H-grade variant is necessary for applications requiring a 4.096V full-scale output span. Verify that the system supply voltage remains within the 4.5V to 5.5V range to ensure specified performance and monotonicity.

Part Context

This component belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions. The IMS suffix identifies the 16-lead MSOP package, while the H suffix denotes the automotive temperature grade (–40°C to 125°C) and 4.096V full-scale capability. The Z suffix specifies the power-on reset behavior to zero-scale.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Other members of the LTC2637 family may serve as alternatives if resolution, package type, or reset configuration requirements differ.

FAQ

What is the settling time for the LTC2637-12?

The typical settling time to ±1LSB (±0.024%) is 5µs at VCC = 3V.

How is the I2C slave address selected?

The slave address is determined by the logic levels applied to the CA0, CA1, and CA2 pins, which can be tied to VCC, GND, or left floating.

Can the DAC operate with an external reference?

Yes, the REF pin can accept an external reference voltage between 1V and VCC to set the full-scale output.