LTC1272-3CCSW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1272-3CCSW#TRPBF is a 12-bit successive approximation sampling analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 5V supply and features an on-chip sample-and-hold circuit with a typical 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. Packaged in a 24-lead Plastic SO Wide (SOL) format, it provides parallel data output compatible with both 8-bit and 16-bit microprocessors via three-state outputs.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 3µs conversion time and 250kHz maximum sampling rate
• Single 5V supply operation with no negative supply required
• On-chip 2.42V bandgap reference with 25ppm/°C temperature coefficient
• Compatible pinout with AD7572 for direct replacement in existing designs

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific speed grade suffix (-3 indicates 3µs conversion time) and package variant (CSW denotes 24-lead Plastic SO Wide). Confirm that the C-grade designation meets the required commercial operating temperature range of 0°C to 70°C. Ensure ordering specifications match the tape and reel packaging format indicated by the #TRPBF suffix.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-supply 12-bit ADC is needed to replace dual-supply legacy parts like the AD7572. The -3 speed grade is appropriate for applications requiring up to 250ksps throughput. Consider the 0.45µs to 1µs acquisition time when designing driving amplifier circuits to ensure proper settling before conversion.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit SAR ADCs. The 'CCSW' identifier specifies the C-grade temperature range and the 24-lead Plastic SO Wide package. The '#TRPBF' suffix indicates lead-free finish and tape and reel packaging. It serves as a modernized, single-supply alternative to older industry-standard converters requiring negative rails.

Analog To Digital Converters (ADC) Replacement Considerations

When replacing an AD7572, reverse the polarity of the external reference bypass capacitor connected to Pin 2. Allow a minimum 1µs delay between conversions to accommodate the sample-and-hold acquisition time. The NC pin (Pin 23) should remain unconnected internally.