LTC1272-5ACSW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1272-5ACSW#PBF is a 12-bit, successive approximation sampling analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single 5V supply and features an on-chip sample-and-hold circuit with a conversion time of 3µs, supporting up to 250kHz sample rates. The device includes a precision 2.42V internal reference and offers a 0V to 5V unipolar input range. It provides parallel data output compatible with both 8-bit and 16-bit microprocessors via three-state outputs. Packaged in a 24-lead Plastic SO Wide (SOL) for surface mount applications, it ensures ESD protection across all pins.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with 3µs Conversion Time
• Single 5V Supply Operation Without Negative Voltage
• On-Chip Sample-and-Hold and 2.42V Reference
• Parallel Interface Compatible with AD7572 Pinout

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 (-3 or -8) required for the target clock frequency, as the base model number does not explicitly define the timing variant in the provided documentation. Confirm that the ordering suffix #PBF indicates lead-free finish compliance. Ensure the 24-lead Plastic SO Wide package dimensions match the PCB footprint requirements for the SW variant.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-supply 12-bit ADC is needed with a 0V to 5V input range. The LTC1272-5ACSW#PBF is suitable for designs requiring direct replacement for the AD7572 without negative supply rails. Note that the '5' in the model number may refer to a specific speed grade or revision; verify against the -3 (4MHz clock) or -8 (1.6MHz clock) options if precise timing synchronization is critical for the application.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit sampling ADCs. It is designed as a drop-in replacement for the industry-standard AD7572 but eliminates the need for a negative supply voltage by utilizing a 2.42V internal reference instead of a negative reference. The SOL package allows for compact surface-mount implementations in industrial and consumer electronics.

Analog To Digital Converters (ADC) Replacement Considerations

When replacing an AD7572, reverse the polarity of the external reference bypass capacitor and short any series resistor connected to the reference pin. Ensure the system allows for a 1µs acquisition time between conversions to maintain accuracy when adapting from the original dual-supply design.