LTC2629CGN-1#PBF

Overview

The LTC2629CGN-1#PBF is a quad 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) in a 16-lead SSOP package. It features built-in high-performance output buffers and operates on a single 2.7V to 5.5V supply. The device utilizes a 2-wire I2C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates a power-on reset circuit that sets outputs to mid-scale upon initialization. Key specifications include ±0.5 LSB DNL, ±1 LSB INL, and a maximum settling time of 7µs at 5V.

Feature Summary

• Quad 12-bit resolution with rail-to-rail buffered voltage outputs
• I2C interface with 27 selectable addresses via CA0/CA1/CA2 pins
• Power-on reset to mid-scale for the -1 suffix variant
• Individual channel power-down capability reducing current to 1µA max

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment and instrumentation

Procurement Notes

Verify the specific ordering suffix '#PBF' indicates lead-free finish and tube packaging as per manufacturer documentation. Confirm the 'GN' designation corresponds to the commercial temperature range (0°C to 70°C). Ensure compatibility with the required I2C bus voltage levels and pull-up resistor configurations for the target application environment.

Selection Notes

Select this component when four independent 12-bit DAC channels are required in a compact SSOP footprint. The '-1' suffix ensures outputs initialize to mid-scale during power-up, which may be necessary for specific downstream circuit safety requirements. Verify that the 400kHz I2C speed meets system timing constraints and that the ±15mA drive current suffices for the load impedance.

Part Context

This part belongs to the LTC2609/LTC2619/LTC2629 family of pin-compatible quad DACs. While the LTC2609 offers 16-bit resolution and the LTC2619 provides 14-bit resolution, the LTC2629 delivers 12-bit performance. All variants share the same 16-lead SSOP package and electrical interface characteristics, allowing for design flexibility across different precision requirements.

Replacement Considerations

Pin-compatible alternatives within the same family include the LTC2609CGN-1#PBF (16-bit) and LTC2619CGN-1#PBF (14-bit). These parts maintain identical pinouts and software interfaces but offer higher resolution. Ensure the increased resolution does not introduce unnecessary cost or complexity if 12-bit precision is sufficient.