LTC2625IGN#PBF

Overview

The LTC2625IGN#PBF is an octal, 12-bit, rail-to-rail voltage-output digital-to-analog converter (DAC) housed in a 16-lead narrow SSOP package. It operates on a single supply voltage ranging from 2.7V to 5.5V and features built-in high-performance output buffers. The device utilizes a 2-wire I²C compatible serial interface supporting standard mode (100kHz) and fast mode (400kHz). Key electrical specifications include a maximum differential nonlinearity (DNL) of ±0.5 LSB, integral nonlinearity (INL) of ±1 LSB, and a typical settling time of 7µs. The part guarantees monotonicity over the operating temperature range of -40°C to +85°C.

Feature Summary

• Octal architecture with eight independent 12-bit DAC channels in a compact 16-lead SSOP package.
• Rail-to-rail voltage outputs capable of sourcing or sinking up to 15mA at 5V supply.
• I²C compatible serial interface with selectable slave addresses via CA0, CA1, and CA2 pins.
• Power-on reset circuit ensures outputs rise less than 10mV above zero-scale during initialization.

Applications

• Mobile communications systems requiring multi-channel signal generation.
• Process control and industrial automation instrumentation.
• Automatic test equipment utilizing precise analog voltage references.
• Battery-powered devices benefiting from low power consumption modes.

Procurement Notes

Verify the specific suffix 'IGN' corresponds to the industrial temperature range (-40°C to +85°C) and 'PBF' indicates lead-free finish. Confirm that the '#PBF' designation does not alter functional parameters compared to standard variants. Ensure compatibility with existing I²C bus capacitance limits when designing for fast mode operation.

Selection Notes

Select this component when board density is critical due to its octal configuration in a small footprint. Choose the IGN variant over the CGN variant if operation below 0°C is required. Consider the LTC2625-1 variant if mid-scale power-on reset behavior is preferred over zero-scale. Ensure external pull-up resistors are selected appropriately for the desired I²C clock speed and bus capacitance.

Part Context

This part belongs to the LTC2605/LTC2615/LTC2625 family of rail-to-rail DACs. The LTC2625 specifically offers 12-bit resolution, whereas the LTC2615 provides 14 bits and the LTC2605 provides 16 bits. All members share identical pinouts and interface protocols, allowing for pin-compatible upgrades in resolution without redesigning the PCB layout.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Direct replacements must match the 16-lead SSOP package, 12-bit resolution, and I²C interface requirements.