LTC1272-8ACSW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1272-8ACSW#PBF is a 12-bit successive approximation sampling analog-to-digital converter (ADC) from Analog Devices. It operates on a single 5V supply and features an on-chip sample-and-hold circuit with a conversion time of 8µs, supporting up to 125kHz sample rates. The device includes a precision 2.42V internal reference and offers a 0V to 5V unipolar input range. It utilizes LTbiCMOS technology for high-speed performance and low power consumption of 75mW. The component is housed in a 24-lead Plastic SO Wide (SOL) package and is compatible with the AD7572 pinout.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with no missing codes
• 8µs conversion time (125kHz max sample rate)
• Single 5V supply operation without negative voltage requirement
• On-chip 2.42V temperature-compensated reference

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 '-8' corresponds to the required 8µs conversion time during procurement. Confirm the '#PBF' suffix indicates lead-free finish and RoHS compliance as per manufacturer specifications. Ensure the SOL-24 package dimensions match the target PCB footprint requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this model when an 8µs conversion cycle is sufficient for the application, offering lower power usage compared to the faster -3 grade. It serves as a direct pin-compatible replacement for the AD7572, provided the reference capacitor polarity is reversed and a 1µs acquisition time is allowed between conversions.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit sampling ADCs. The 'A' denotes the commercial temperature range (0°C to 70°C), while 'C' would indicate extended range. The 'SW' identifies the 24-lead Plastic SO Wide package. The '#PBF' signifies a lead-free tin finish compliant with EU directives.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1272-8ACSW#PBF is functionally pin-compatible with the AD7572. When replacing an AD7572, reverse the polarity of the external reference bypass capacitor and ensure a minimum 1µs delay between conversions to allow for proper sample-and-hold acquisition.