LTC2428

U U LTC2424/LTC2428 4-/8-Channel 20-Bit µPower No Latency ∆ΣTM ADCs FEATURES s Pin Compatible 4-/8-Channel 20-Bit ADCs s 8ppm INL, No Missing Codes at 20 Bits s 4ppm Full-Scale Error and 0.5ppm Offset s 1.2ppm Noise s Digital Filter Settles in a Single Cycle. Each Conversion is Accurate, Even After Changing Channels s Fast Mode: 16-Bit Noise, 12-Bit 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 Can Be Interchanged with 24-Bit LTC2404/LTC2408 Uif ZSSET Pin is Grounded APPLICATIO S s Weight Scales s Direct Temperature Measurement s Gas Analyzers s Strain-Gage Transducers s Instrumentation s Data Acquisition s Industrial Process Control s 4-Digit DVMs DESCRIPTIO The LTC®2424/LTC2428 are 4-/8-channel 2.7V to 5.5V micropower 20-bit A/D converters with an integrated oscillator, 8ppm INL and 1.2ppm RMS noise. They use delta-sigma technology and provide single cycle digital filter settling time (no latency delay) for multiplexed applications. The first conversion after the channel is changed is always valid. Through a single pin the LTC2424/ LTC2428 can be configured for better than 110dB rejection at 50Hz or 60Hz ±2%, or can be driven by an external oscillator for a user defined rejection frequency in the range 1Hz to 800H...