LTC2657BIUFD-H16#PBF

Overview

The LTC2657BIUFD-H16#PBF is an octal, 16-bit digital-to-analog converter (DAC) from Analog Devices. It features rail-to-rail output buffers and a precision internal reference with a maximum temperature coefficient of 10ppm/°C. The H-option variant provides a full-scale output of 4.096V and requires a supply voltage between 4.5V and 5.5V. Communication is handled via a 2-wire I²C interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) of ±4 LSB, a settling time of 9.1µs for 16-bit accuracy, and a typical supply current of 3.3mA. The device is housed in a 20-lead QFN package.

Feature Summary

• Octal architecture with 8 independent 16-bit DAC channels
• Integrated 4.096V full-scale reference with 10ppm/°C max drift
• Rail-to-rail buffered outputs with guaranteed monotonicity
• I²C serial interface with selectable power-on reset states

Applications

• Mobile communications systems
• Process control and industrial automation
• Instrumentation equipment
• Automatic test equipment
• Automotive applications

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence as per manufacturer standards. Confirm the UFD package designation matches the required 20-lead QFN footprint. Ensure the H16 designation aligns with the 4.5V to 5.5V supply requirement and 4.096V output span. Cross-reference the BI grade for the -40°C to +85°C operating range and ±4LSB INL specification against system requirements.

Selection Notes

Select this component when multiple isolated analog outputs are needed within a compact space. The H-option is suitable for designs requiring a 4.096V swing, whereas the L-option supports lower voltages down to 2.7V. Consider the external reference mode if a different full-scale voltage is required, as the output can be set to twice the external reference value. Verify that the I²C bus speed and address configuration via CA pins meet the system controller's capabilities.

Part Context

This part belongs to the LTC2657 family of octal DACs, which also includes 12-bit variants and TSSOP package options. The 'B' indicates the electrical grade with ±4LSB maximum INL, while 'I' denotes the industrial temperature range. The 'H' specifies the 4.096V internal reference option, distinct from the 'L' option's 2.5V reference. The '#PBF' suffix confirms the lead-free finish.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2657BCUFD-H16#PBF for commercial temperature range or LTC2657BIUFD-L16#PBF for lower voltage operation. For 12-bit resolution needs, consider LTC2657BIUFD-L12#PBF. External reference versions like LTC2657BIUFD-H16#TRPBF offer tape-and-reel packaging.