LTC2754BCUKG-16#PBF

Overview

The LTC2754BCUKG-16#PBF is a quad 16-bit multiplying serial-input current-output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7V to 5.5V supply and guarantees monotonicity over temperature. The device features SoftSpan technology, allowing six programmable output ranges up to ±10V via a 3-wire SPI interface or pin-strapping. Key electrical specifications include a maximum integral nonlinearity (INL) of ±2 LSB, differential nonlinearity (DNL) of ±1 LSB, and a settling time of 2μs for 16-bit accuracy. Supply current is typically 0.5μA.

Feature Summary

• Quad 16-bit resolution with guaranteed monotonic operation over temperature
• SoftSpan architecture supporting six output ranges: 0V to 5V, 0V to 10V, -2.5V to 7.5V, ±2.5V, ±5V, and ±10V
• Low glitch impulse of 1.25nV•s at 5V supply
• Serial readback capability for all on-chip registers

Applications

• High resolution offset and gain adjustment systems
• Process control and industrial automation
• Automatic test equipment
• Data acquisition systems

Procurement Notes

Verify the specific 'B' grade designation against application requirements, as it offers ±2 LSB INL compared to the 'A' grade's ±1 LSB. Confirm the operating temperature range matches the 'C' suffix specification of 0°C to 70°C. Ensure the QFN-52 package footprint aligns with PCB layout constraints.

Selection Notes

Select this component when four independent 16-bit current-output channels are required in a compact form factor. The SoftSpan feature eliminates external resistor networks for range switching. Consider the 'I' grade variant if operation below 0°C is necessary. Verify that the external reference voltage supports the desired output span calculations.

Part Context

This part belongs to the LTC2754 family of quad DACs. The 'B' suffix indicates a specific performance bin with ±2 LSB INL, distinct from the higher precision 'A' grade. The 'C' suffix defines the commercial temperature range. It shares the same 52-pin QFN package and pinout with other variants in the series.

Replacement Considerations

The LTC2754ACUKG-16#PBF provides identical functionality with tighter ±1 LSB INL specifications. For lower resolution needs, the LTC2754CUKG-12#PBF is available. Temperature variations require the LTC2754BIUKG-16#PBF (-40°C to 85°C).

FAQ

How are the output ranges configured?

Ranges can be programmed dynamically via the 3-wire SPI interface or fixed manually by strapping pins M-SPAN, S2, S1, and S0.

What is the function of the CLR pin?

The CLR pin asynchronously clears all DAC registers and forces all DAC outputs to zero volts regardless of the selected output range.

Can the device operate with bipolar supplies?

No, the LTC2754 operates from a single positive supply (2.7V to 5.5V), but generates bipolar output voltages using internal reference inversion.