LTC2420

LTC2420 20-Bit µPower No Latency ∆ΣTM ADC in SO-8 U U 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 Components Required s 110dB Min, 50Hz/60Hz Notch Filter s Reference Input Voltage: 0.1V to VCC s Live Zero—Extended Input Range Accommodates 12.5% Overrange and Underrange s Single Supply 2.7V to 5.5V Operation s Low Supply Current (200µA) and Auto Shutdown s Pin Compatible 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 110dB 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 components. The converter accepts any external reference voltage from 0.1V to VCC. With i...