LTC1272-5ACSW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1272-5ACSW#TRPBF is a 12-bit, 3µs 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 2.42V reference output. The device supports up to 250kHz sample rates and consumes approximately 75mW of power. It utilizes LTbiCMOS switched-capacitor technology for high-speed conversion and includes ESD protection on all pins. The component is housed in a 24-lead Plastic SO Wide package.

Analog To Digital Converters (ADC) Feature Summary

• 12-bit resolution with 3µs conversion time
• Single 5V supply operation without negative voltage requirement
• On-chip 2.42V precision reference with 25ppm/°C temperature coefficient
• Up to 250kHz sample rate capability

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 the specific ordering suffix #TRPBF indicates tape and reel packaging configuration. Confirm the AC grade corresponds to the commercial temperature range of 0°C to 70°C as specified in the manufacturer's documentation. Ensure compatibility with the 24-lead Plastic SO Wide package dimensions for PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit ADC with fast 3µs conversion times is required in a single-supply environment. It serves as a pin-compatible replacement for the AD7572, though it requires reversing the reference capacitor polarity and allowing a 1µs acquisition time between conversions. 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 shares the same pinout as the industry-standard AD7572 but offers faster conversion speeds and simplified single-supply operation. The device integrates a high-speed SAR architecture with a precision reference and sample-and-hold stage on a single die.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC1272 is designed to plug into AD7572 sockets. When replacing an AD7572, reverse the polarity of the reference bypass capacitor and short the 10Ω series resistor. Allow a minimum 1µs delay between conversions to accommodate the sample-and-hold acquisition time.