LTC2420 Datasheet | Linear Technology

LTC2420 20-Bit µPower No Latency ∆ΣTM ADC in SO-8 Features s 20-Bit ADC in SO-8 Package s 8ppm INL, No Missing Codes at 20 Bits s 4ppm Full-Scale Error s 0.5ppm Offset s 1.2ppm Noise s Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step s Fast Mode: 16-Bit Noise, 12 Bits TUE at 100sps s Internal Oscillator- No External ponents Required s 110d B Min, 50Hz/60Hz Notch Filter s Reference Input Voltage: 0.1V to VCC s Live Zero- Extended Input Range Acmodates 12.5% Overrange and Underrange s Single Supply 2.7V to 5.5V Operation s Low Supply Current (200µA) and Auto Shutdown s Pin patible with 24-Bit LTC2400 U APPLICATIO S s Weight Scales s Direct Temperature Measurement s Gas Analyzers s Strain Gauge Transducers s Instrumentation s Data Acquisition s Industrial Process Control s 4-Digit DVMs DESCRIPTIO The LTC®2420 is a micropower 20-bit A/D converter with an integrated oscillator, 8ppm INL and 1.2ppm RMS noise that operates from 2.7V to 5.5V. It uses delta-sigma technology and provides a digital filter that settles in a single cycle for multiplexed applications. Through a single pin, the LTC2420 can be configured for better than 110d B rejection at 50Hz or 60Hz ±2%, or it can be driven by an external oscillator for a user-defined rejection frequency in the range 1Hz to 800Hz. The internal oscillator requires no external frequency setting ponents. The converter accepts any external reference voltage from 0.1V to VCC. With its extended input conversion range of - 12.5% VREF to 112.5% VREF, the LTC2420 smoothly resolves the offset and overrange problems of preceding sensors or signal conditioning circuits. The LTC2420 municates through a flexible 3-wire digital interface which is patible with SPI and MICROWIRETM protocols. , LTC and LT are registered trademarks of Linear Technology Corporation. No Latency ∆Σ is a trademark of Linear Technology Corporation. MICROWIRE is a trademark of National Semiconductor...