LTC2633ACTS8-LZ12

Overview

The LTC2633ACTS8-LZ12 is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated precision reference providing a 2.5V full-scale output and operates on a single 2.7V to 5.5V supply. The device communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the –40°C to 125°C temperature range. Power-on reset defaults to zero-scale.

Feature Summary

• Dual 12-bit resolution with ±1.5 LSB maximum INL error
• Integrated 2.5V precision reference with 10ppm/°C drift
• I²C interface with selectable standard or fast mode clock rates
• Power-on reset to zero-scale for consistent initialization

Applications

• Mobile communications systems
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive applications

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-unit tape and reel quantity, distinct from the standard 2,500-unit reel. Confirm the 'A' grade designation for ±1.5 LSB INL and 'LZ' code for 2.5V internal reference with zero-scale power-on reset. Ensure compatibility with the 8-lead TSOT-23 surface mount package requirements.

Selection Notes

Select this part when dual-channel 12-bit accuracy with tight linearity (±1.5 LSB) is required in a compact footprint. The 'L' variant supports lower voltage operation (2.7V–5.5V) compared to the 'H' variant (4.5V–5.5V). The 'Z' power-on reset code ensures outputs start at zero, which is critical for protecting downstream circuits during system startup. Verify I²C address configuration via the CA0 pin if multiple devices are present.

Part Context

This component belongs to the LTC2633 family of dual DACs, which offers various combinations of resolution (8-, 10-, 12-bit), reference types (internal/external), and power-on reset behaviors. The ACTS8-LZ12 specifically denotes the commercial/high-temp grade (H), TSOT-23 package, low-voltage internal reference, and zero-scale reset option within this broader product line.

Replacement Considerations

Direct replacements within the same family include LTC2633ACTS8-HZ12 (4.096V FS, higher VCC min) or LTC2633ACTS8-LI12 (mid-scale reset). Cross-family alternatives like the LTC2635 offer quad channels but differ in package size and pinout.