LTC2637IMS-HZ8#TRPBF

Overview

The LTC2637IMS-HZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes double-buffered data latches, power-on reset to zero-scale in internal reference mode, and rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with ±0.5 LSB INL and ±0.5 LSB DNL accuracy.
• Integrated Precision Reference: Internal 4.096V reference with 10ppm/°C drift; supports external reference input.
• Automotive Grade Reliability: Guaranteed monotonic operation across the –40°C to 125°C temperature range.
• Low Power Consumption: Typical supply current of 1.1mA at 5V; power-down mode reduces current to 30µA.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify that the specific ordering suffix #TRPBF corresponds to the tape and reel packaging configuration required for automated assembly processes. Confirm that the H-grade designation meets the necessary automotive temperature specifications for the intended deployment environment.

Selection Notes

Select this part when eight isolated voltage outputs are required within a compact footprint. The H-grade variant is appropriate for applications requiring operation up to 125°C. Ensure the system supply voltage remains within the 4.5V to 5.5V range to maintain specified performance levels.

Part Context

This component belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions. The IMS package denotes a 16-lead MSOP form factor, while the H suffix indicates the automotive temperature grade. The Z suffix specifies the power-on reset behavior to zero-scale when using the internal reference.

Replacement Considerations

Direct substitutes include other members of the LTC2637 family such as the LTC2637IMS-HZ10 or LTC2637IMS-HZ12 for higher resolution requirements, provided the pinout and software compatibility remain consistent.

FAQ

What is the settling time for the LTC2637-8?

The typical settling time to ±1LSB (±0.39%) is 3.9µs for the H-grade device operating at 5V.

How is the I2C address configured?

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

Does the device support external references?

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