LTC2631CTS8-HZ8#TRPBF

Overview

The LTC2631CTS8-HZ8#TRPBF is an 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in an 8-lead TSOT-23 package. It features a built-in precision reference with a full-scale output of 4.096V, requiring a supply voltage between 4.5V and 5.5V. The device utilizes a 2-wire I²C interface supporting standard (100kHz) and fast (400kHz) modes. It includes a power-on reset circuit that defaults the output to zero-scale upon power-up. Key electrical specifications include a maximum integral nonlinearity (INL) of ±0.5 LSB, a settling time of 3.7µs at ±1/4 LSB for 8-bit resolution, and a typical supply current of 200µA at 5V.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• I²C compatible serial interface with selectable clock rates up to 400kHz
• Power-on reset function configured to drive output to zero-scale
• Rail-to-rail buffered output guaranteed monotonic over temperature

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable battery-powered equipment
• Automotive electronic modules

Procurement Notes

Verify the specific suffix #TRPBF indicates a tape and reel packaging format containing 2,500 pieces. Confirm the H-grade designation corresponds to the required 4.5V to 5.5V operating voltage range and the Z-power-on-reset configuration matches system initialization requirements. Ensure the C-temperature grade meets the operational environment limits.

Selection Notes

Select this part when a compact 8-bit DAC with a fixed 4.096V internal reference is needed. The H-grade variant is mandatory for applications requiring operation above 4.5V. The Z-suffix ensures the DAC output initializes to 0V on power-up, which is critical for safety or default-state requirements in motor control or sensor biasing circuits.

Part Context

This component belongs to the LTC2631 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The LTS8 package denotes the 8-lead ThinSOT form factor. The H-series specifically targets higher voltage rails compared to the L-series, while the Z-option differentiates it from M-series parts by defining the initial output state after power cycling.

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2631CTS8-HZ10#TRPBF (10-bit) or LTC2631CTS8-HZ12#TRPBF (12-bit), provided the additional resolution is acceptable. Other families like the LTC2632 (dual channel) require schematic adjustments.