LTC1272-3ACSW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1272-3ACSW#TRPBF is a 12-bit, 250kHz sampling Analog-to-Digital Converter (ADC) utilizing successive approximation architecture. It operates from a single 5V supply and features an on-chip sample-and-hold circuit with a typical acquisition time of 0.45µs. The device includes a factory-trimmed 2.42V bandgap reference with 25ppm/°C temperature coefficient. It offers a conversion time of 3µs (12 clock cycles) and supports parallel digital output interfaces compatible with both 8-bit and 16-bit microprocessors via the HBEN multiplexing feature. The component 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 and ±1 LSB differential linearity error
• Single 5V supply operation eliminating the need for negative voltage rails
• On-chip 2.42V precision reference with low temperature drift
• AD7572 pin-compatible form factor for easy system upgrades

Analog To Digital Converters (ADC) Applications

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

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific speed grade suffix '-3' corresponds to the required 250kHz throughput. Confirm the SOL-24 package dimensions match the target PCB footprint. Ensure the operating temperature range (0°C to 70°C) aligns with the environmental specifications of the final assembly.

Analog To Digital Converters (ADC) Selection Notes

Select this model when a direct replacement for the AD7572 is needed without modifying the negative supply infrastructure. Choose the -3 variant over the -8 variant if the application requires a maximum sampling rate of 250kHz rather than 111kHz. Verify that the driving amplifier can settle within the 1µs inter-conversion delay to maintain accuracy.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC1272 family of high-speed ADCs. The 'A' indicates commercial temperature grading (0°C to 70°C), while 'CSW' denotes the 24-lead Plastic SO Wide package. The '#TRPBF' suffix specifies the tape and reel packaging format and lead-free finish compliance.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1272 is designed as a drop-in replacement for the AD7572. When substituting, reverse the polarity of the external reference bypass capacitor connected to Pin 2 and ensure a minimum 1µs delay between conversions to allow for proper sample-and-hold acquisition.