LTC2631ITS8-HZ8#TRPBF

Overview

The LTC2631ITS8-HZ8#TRPBF is a single-channel, 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 operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key specifications include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a typical settling time of 3.7µs at ±1LSB, and low power consumption of 200µA at 5V. It incorporates a power-on reset circuit configured to clear the output to zero-scale upon initialization.

Feature Summary

• Integrated 4.096V precision reference with ±10ppm/°C temperature coefficient
• I²C interface with selectable slave addresses via CA0 and CA1 pins
• Power-on reset to zero-scale for consistent system initialization
• Rail-to-rail buffered output guaranteed monotonic over temperature

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable battery-powered equipment
• Automotive sensor interfaces

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging format. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to 125°C. Ensure the Z suffix is correctly interpreted as the zero-scale power-on reset option. Cross-reference the ITS8 package code with the manufacturer's TSOT-23 mechanical drawings for footprint compatibility.

Selection Notes

Select this part when a 4.096V full-scale output is required with an internal reference. The H-grade is necessary for applications operating between –40°C and 125°C. The 8-bit resolution limits linearity accuracy compared to 10 or 12-bit variants but reduces data throughput requirements. Verify that the supply voltage remains above 4.5V, as lower voltages are not supported by the H-grade variant.

Part Context

This component belongs to the LTC2631 family of single-channel DACs. Variants differ by resolution (8, 10, or 12 bits), full-scale voltage (2.5V for L-grade, 4.096V for H-grade), and power-on reset behavior (M for mid-scale, Z for zero-scale). The ITS8 suffix denotes the 8-lead ThinSOT (TSOT-23) plastic package type used across the series.

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2631ITS8-HZ10#TRPBF (10-bit) and LTC2631ITS8-HZ12#TRPBF (12-bit). These offer higher resolution but maintain identical pinouts and software commands. For external reference applications, verify that the REF pin configuration remains compatible.