LTC2637CMS-HZ8#TRPBF

Overview

The LTC2637CMS-HZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features a rail-to-rail output buffer and an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates double-buffered data latches and a power-on reset circuit configured to reset to zero-scale in internal reference mode. The component is housed in a 14-lead DFN package.

Feature Summary

• Octal 8-bit resolution with guaranteed monotonicity over the operating temperature range
• Integrated 2.5V full-scale reference with ±10ppm/°C temperature coefficient
• Rail-to-rail output buffers with ultralow DAC-to-DAC crosstalk (<3nV•s)
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify that the suffix #TRPBF confirms tape and reel packaging containing 2500 pieces. Confirm the 'H' designation indicates the automotive temperature grade (-40°C to 125°C). Ensure the 'Z' suffix matches the required zero-scale power-on reset behavior for the specific application design.

Selection Notes

Select this part when eight independent 8-bit voltage outputs are required within a compact footprint. The 2.5V internal reference suits applications where the output span does not require the 4.096V range of the H-grade variants. Verify that the I2C address configuration via CA0, CA1, and CA2 pins meets system addressing requirements.

Part Context

This component belongs to the LTC2637 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The CMS variant specifically denotes the commercial temperature grade (0°C to 70°C) housed in a 16-lead MSOP package, while the datasheet details specifications for both DFN and MSOP packages across different temperature grades.

Replacement Considerations

LTC2637IMS-HZ8#TRPBF

FAQ

What is the settling time for the LTC2637-8?

The typical settling time to ±1LSB (±0.39%) is 3.5µs at VCC = 3V.

How is the I2C slave address determined?

The address is selected by connecting the CA0, CA1, and CA2 pins to VCC, GND, or leaving them floating.

What is the maximum INL error for the 8-bit version?

The maximum Integral Nonlinearity (INL) error is ±0.5 LSB.