LTC1272-8ACN#PBF

Analog To Digital Converters (ADC) Overview

The LTC1272-8ACN#PBF is a 12-bit successive approximation sampling analog-to-digital converter (ADC) operating from a single 5V supply. It features an on-chip sample-and-hold circuit and a precision 2.42V reference, eliminating the need for negative supplies. The device offers an 8µs conversion time with a maximum sampling rate of 111kHz. It provides a parallel digital interface compatible with both 8-bit and 16-bit microprocessors via three-state outputs. Key electrical specifications include ±0.5 LSB integral nonlinearity, 75mW typical power dissipation, and an input voltage range of 0V to 5V.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 8µs conversion time and 111kHz maximum sampling rate
• Single 5V supply operation with integrated 2.42V bandgap reference
• On-chip sample-and-hold with 0.45µs acquisition time
• Parallel data output supporting 8-bit or 12-bit word formats

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify that the specific suffix ACN corresponds to the PDIP-24 package and the 0°C to +70°C commercial temperature grade. Confirm the -8 speed grade indicates the 8µs conversion time variant rather than the faster -3 version. Ensure the #PBF designation confirms lead-free compliance and RoHS status as per manufacturer standards.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-supply 12-bit ADC is required without negative voltage rails. The 8µs conversion speed suits applications requiring up to 111ksps throughput. Compare against the AD7572 if pin compatibility is critical, noting the LTC1272 requires reversed reference capacitor polarity during substitution. Ensure the driving amplifier can settle within the 1µs inter-conversion delay.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of 12-bit sampling ADCs. It serves as a modern replacement for the industry-standard AD7572, offering improved speed and simplified power requirements. The family includes variants with different conversion times (-3 and -8 grades) and packages (PDIP and SOIC). The ACN suffix specifically denotes the commercial temperature range and through-hole packaging.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute: AD7572. Note that the LTC1272 operates on a single 5V supply, whereas the AD7572 typically requires dual supplies. When substituting, reverse the polarity of the reference bypass capacitor and allow a 1µs acquisition time between conversions.