LTC2753CUK-14#TRPBF

Overview

The LTC2753CUK-14#TRPBF is a dual-channel, 14-bit multiplying digital-to-analog converter (DAC) with parallel input and current output. It operates from 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 and includes a bidirectional I/O interface for register readback. Key electrical specifications include a settling time of 2μs to ±1 LSB, a maximum gain error of ±2 LSB, and a typical supply current of 0.5μA.

Feature Summary

• Dual 14-bit resolution with guaranteed monotonicity over the full operating temperature range
• SoftSpan architecture providing six software-programmable or pin-strapped output ranges
• Bidirectional parallel interface enabling readback of all internal registers
• Low power consumption with 0.5μA typical supply current and asynchronous CLR pin

Applications

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

Procurement Notes

Verify that the #TRPBF suffix indicates tape and reel packaging rather than tube packaging. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the specific lot date code meets project requirements as manufacturing dates vary by batch.

Selection Notes

Select this model when 14-bit resolution is sufficient for the application's linearity requirements. The commercial grade ('C') is suitable for environments maintained between 0°C and 70°C; use the 'I' grade for industrial temperatures (-40°C to 85°C). This part requires an external reference voltage and inverting amplifier configuration for optimal performance.

Part Context

This component belongs to the LTC2753 family of SoftSpan DACs, which also includes 12-bit and 16-bit variants. The 14-bit version offers a balance between resolution and cost compared to the 16-bit models. All variants share the same 48-lead QFN package and functional interface, differing primarily in resolution and accuracy specifications.

Replacement Considerations

LTC2753CUK-14#PBF (Tube Packaging): Identical electrical characteristics and functionality; differs only in shipping container format.

FAQ

How are the output ranges configured?

Output ranges can be programmed via the parallel interface using the S0-S2 span bits or fixed by strapping the MSPAN pin to VDD for single-span operation.

What is the function of the CLR pin?

The CLR pin asynchronously clears the DAC outputs to 0V in any selected output range by resetting the data registers to the zero-volt code.

Does the device support register readback?

Yes, the bidirectional parallel interface allows reading back the contents of any on-chip register, including both data and span input/DAC registers.