Overview
The LTC2420IS8#TRPBF is a 20-bit, micropower, no latency, delta-sigma analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed to operate with high precision and low power consumption, making it suitable for a variety of data acquisition applications. The LTC2420 features an integrated oscillator and a digital filter that settles in a single cycle, which is particularly beneficial for multiplexed applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 20 bits |
| Input Range | –12.5% VREF to 112.5% VREF |
| Reference Voltage Range | 0.1 V to VCC |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Integral Nonlinearity (INL) | 8 ppm |
| RMS Noise | 1.2 ppm |
| Notch Filter Rejection | Better than 110 dB at 50 Hz or 60 Hz ±2% |
| Digital Interface | 3-wire, compatible with SPI and MICROWIRE protocols |
| Package | 8-Lead SOIC (Narrow 0.15 Inch) |
Key Features
- Integrated oscillator with no external frequency setting components required
- Single-cycle settling digital filter for multiplexed applications
- Configurable notch filter for 50 Hz or 60 Hz interference rejection or user-defined rejection frequency (1 Hz to 800 Hz)
- Flexible 3-wire digital interface compatible with SPI and MICROWIRE protocols
- Low power consumption, suitable for battery-powered applications
- Extended input conversion range to handle offset and overrange issues from preceding sensors or signal conditioning circuits
Applications
The LTC2420 is used in various data acquisition applications, including weigh scales, gas analyzers, and other precision measurement systems. Its high accuracy, low noise, and ability to reject power line interference make it an ideal choice for applications requiring high precision and reliability.
Q & A
- What is the resolution of the LTC2420 ADC?
The LTC2420 has a resolution of 20 bits. - What is the input range of the LTC2420?
The input range is –12.5% VREF to 112.5% VREF. - What is the reference voltage range for the LTC2420?
The reference voltage range is from 0.1 V to VCC. - What is the supply voltage range for the LTC2420?
The supply voltage range is from 2.7 V to 5.5 V. - What is the integral nonlinearity (INL) of the LTC2420?
The INL is 8 ppm. - How does the LTC2420 handle power line interference?
The LTC2420 can be configured to reject 50 Hz or 60 Hz interference with better than 110 dB rejection. - What type of digital interface does the LTC2420 use?
The LTC2420 uses a flexible 3-wire digital interface compatible with SPI and MICROWIRE protocols. - What package options are available for the LTC2420?
The LTC2420 is available in an 8-Lead SOIC (Narrow 0.15 Inch) package. - What are some typical applications of the LTC2420?
The LTC2420 is typically used in weigh scales, gas analyzers, and other precision measurement systems. - How does the LTC2420 handle multiplexed applications?
The LTC2420 features a digital filter that settles in a single cycle, making it suitable for multiplexed applications.
