LTC2435-1CGN#PBF

Analog To Digital Converters (ADC) Overview

The LTC2435-1CGN#PBF is a 20-bit, no-latency delta-sigma analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single supply voltage ranging from 2.7V to 5.5V and features differential inputs with a common-mode range extending from GND to VCC. The device integrates an internal oscillator that provides simultaneous rejection of 50Hz and 60Hz line frequencies within a ±2% tolerance band. Key electrical specifications include a maximum integral nonlinearity (INL) of 3ppm, a gain error of 10ppm, and an RMS noise of 0.8ppm. It utilizes a flexible 3-wire digital interface compatible with SPI and MICROWIRE protocols.

Analog To Digital Converters (ADC) Feature Summary

• 20-bit resolution with no missing codes and 3ppm INL
• Simultaneous 50Hz/60Hz line frequency rejection for the LTC2435-1 variant
• Differential input and reference with GND to VCC common-mode range
• Single conversion settling time suitable for multiplexed applications

Analog To Digital Converters (ADC) Applications

• Direct sensor digitization
• Weight scales
• Direct temperature measurement
• Gas analyzers
• Strain gage transducers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix GN#PBF corresponds to the 16-lead plastic SSOP package in the tube format. Confirm the C suffix indicates the commercial operating temperature range of 0°C to 70°C. Ensure the part number matches the LTC2435-1 variant for simultaneous 50Hz/60Hz rejection capabilities rather than the standard LTC2435.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2435-1 variant when simultaneous rejection of both 50Hz and 60Hz power line interference is required. Choose this component for multiplexed systems due to its single-cycle settling time and lack of latency. Ensure the external reference voltage remains between 0.1V and VCC to maintain specified performance levels.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2435/LTC2435-1 family of micropower ADCs. It serves as a high-speed, 2x speed-up version of the LTC2430, offering an output rate of approximately 13.75Hz with simultaneous notch filtering. The device is designed for precision measurements where low noise and high linearity are critical.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2435CGN#PBF is a functional substitute if only single-frequency (50Hz or 60Hz) rejection is needed. Verify pin compatibility in the 16-lead SSOP package. Note that the LTC2435 lacks the simultaneous dual-notch capability of the LTC2435-1.