LTC1272-3CCSW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1272-3CCSW#PBF is a 12-bit successive approximation sampling analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single 5V supply and features an on-chip sample-and-hold circuit with a maximum conversion time of 3µs, supporting up to 250kHz sampling rates. The device includes a precision internal reference outputting 2.42V and offers pin-compatible replacement for the AD7572. Data is available via parallel outputs in either 12-bit word or two 8-bit byte formats. It is housed in a 24-lead plastic SO Wide (SOL) package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with no missing codes
• 3µs conversion time and 250kHz sampling rate
• Single 5V supply operation without negative voltage requirement
• On-chip 2.42V reference with 25ppm/°C temperature coefficient

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 that the component matches the specific speed grade indicated by the suffix '3', which corresponds to the 3µs conversion time specification. Confirm the package type is the 24-lead Plastic SO Wide (SOL) as denoted by 'CSW'. Ensure the operating temperature range aligns with the 'CC' commercial grade rating of 0°C to 70°C before integration into the design.

Analog To Digital Converters (ADC) Selection Notes

Select this model when a 12-bit ADC with a 3µs conversion time is required for single-supply applications. It serves as a direct drop-in replacement for the AD7572 if the reference capacitor polarity is reversed and a 1µs acquisition time is permitted between conversions. Choose the 'CC' grade for commercial temperature ranges and 'AC' for extended industrial ranges.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit sampling ADCs. The '3' suffix specifies the faster 3µs conversion variant, while '8' denotes the slower 8µs version. The 'CCSW' indicates the commercial temperature grade and the 24-lead Plastic SO Wide package. The '#PBF' suffix confirms lead-free finish compliance.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1272 is designed to be pin-compatible with the AD7572. When replacing an AD7572, reverse the polarity of the reference bypass capacitor and allow a 1µs sample-and-hold acquisition time between conversions.