LTC2753IUK-12#PBF

Overview

The LTC2753IUK-12#PBF is a dual 12-bit multiplying parallel-input, current-output DAC from Analog Devices. It operates on a single 2.7V to 5.5V supply and features SoftSpan technology for six programmable output ranges: two unipolar (0V to 5V, 0V to 10V) and four bipolar (±2.5V, ±5V, ±10V, –2.5V to 7.5V). The device guarantees monotonicity over temperature with a maximum DNL of ±1 LSB and INL of ±1 LSB. Key electrical parameters include a settling time of 2μs to ±1 LSB, a maximum supply current of 1μA, and an asynchronous CLR pin that resets outputs to 0V.

Feature Summary

• Dual 12-bit resolution with bidirectional parallel I/O supporting register readback
• SoftSpan architecture enabling six software-programmable or pin-strapped output ranges
• Guaranteed monotonic operation over the full industrial temperature range (-40°C to +85°C)
• Asynchronous clear function and power-on reset circuitry ensuring outputs start at 0V

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring precise current or voltage generation
• Data acquisition systems needing high-resolution signal conditioning

Procurement Notes

Verify the specific suffix 'I' indicates the -40°C to +85°C industrial temperature grade and '#PBF' denotes lead-free packaging in tube format. Confirm the package type is the 48-lead 7mm × 7mm QFN. Ensure the design supports the required parallel interface timing and external reference configuration for the selected SoftSpan range.

Selection Notes

Select this part when dual-channel 12-bit precision is required with flexible output ranging. The I-grade variant is necessary for environments exceeding commercial temperature limits. Consider the 1μA supply current for low-power applications. Verify that the external reference voltage matches the desired output span scaling, as ranges are linearly scaled relative to VREF.

Part Context

This component belongs to the LTC2753 family, which includes 14-bit and 16-bit variants (e.g., LTC2753IUK-14#PBF, LTC2753AIUK-16#PBF). All members share the same 48-pin QFN footprint and SoftSpan functionality. The 12-bit version offers lower cost and slightly relaxed linearity specifications compared to the 16-bit models while maintaining identical interface and power characteristics.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2753 variants such as LTC2753CUK-12#PBF (commercial temp) or higher-resolution versions like LTC2753IUK-14#PBF. Ensure the replacement meets the specific temperature and accuracy requirements of the application.