LTC1272-8CCSW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1272-8CCSW#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 111kHz 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), it provides parallel digital outputs compatible with both 8-bit and 16-bit microprocessors.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 8µs conversion time and 111kHz maximum sampling rate
• Single 5V supply operation with no negative voltage required
• On-chip 2.42V bandgap reference with 25ppm/°C temperature coefficient
• Compatible pinout with industry standard AD7572 for direct replacement

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific speed grade suffix; the '8' indicates the 8µs conversion variant. Confirm the 'CC' designation corresponds to the commercial temperature range (0°C to 70°C). Ensure the '#PBF' suffix denotes lead-free packaging compliant with RoHS standards before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single 5V supply is required instead of dual supplies. Choose the '-8' grade if system timing allows for 8µs conversions, which reduces power consumption compared to the faster '-3' grade. Ensure the driving amplifier can settle within the 1µs acquisition window between conversions.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit ADCs. It serves as a drop-in replacement for the AD7572, differing primarily by eliminating the need for a negative supply rail and providing a positive 2.42V reference output instead of a negative one.

Analog To Digital Converters (ADC) Replacement Considerations

When replacing an AD7572, reverse the polarity of the external reference bypass capacitor connected to Pin 2. Short the 10Ω series resistor typically found in AD7572 circuits. Allow a minimum 1µs delay between conversions to ensure proper sample-and-hold acquisition.