LTC1272-8ACSW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1272-8ACSW#TRPBF is a 12-bit successive approximation sampling analog-to-digital converter (ADC) from Analog Devices. It features an on-chip sample-and-hold and operates from a single 5V supply, eliminating the need for negative voltages. The device offers an 8µs conversion time with a maximum sampling rate of 111kHz. Key specifications include a 0V to 5V unipolar input range, a factory-trimmed 2.42V internal reference, and 75mW typical power dissipation. It utilizes LTBiCMOS technology and provides data output in either a full 12-bit word or two 8-bit bytes via a parallel interface.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 8µs conversion time and up to 111kHz sampling rate
• Single 5V supply operation with no negative supply required
• On-chip 2.42V precision reference and sample-and-hold circuit
• Compatible with AD7572 pinout for direct socket replacement

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems
• Digital signal processing (DSP)
• Multiplexed data acquisition systems
• Single supply systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific speed grade suffix (8µs vs 3µs) matches design requirements. Confirm the TSOP/SOIC package variant corresponds to the SW designation. Ensure the lead-free finish (#PBF) aligns with environmental compliance standards. Cross-reference the manufacturer's current documentation for any updates to absolute maximum ratings or thermal characteristics.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-supply 12-bit ADC is needed without external negative rails. The 8µs conversion speed suits applications requiring up to 111kHz throughput. Consider the AD7572 compatibility if retrofitting existing designs, noting the reversed reference capacitor polarity requirement. Evaluate the 75mW power consumption against thermal constraints in the 24-lead SOIC package.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit sampling ADCs. The '8' indicates the 8µs conversion speed grade, distinct from the faster 3µs variant. The 'ACSW' denotes the commercial temperature range (0°C to 70°C) and the 24-lead Plastic SO Wide package. The '#TRPBF' suffix specifies tape and reel packaging with lead-free finish.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1272 is designed as a drop-in replacement for the AD7572. When substituting, reverse the polarity of the reference bypass capacitor and short the 10Ω series resistor present in AD7572 circuits. Ensure the system clock frequency matches the 1.6MHz requirement for the 8µs grade.