LTC2420 - 20-Bit µPower No Latency Delta Sigma™ ADC in SO-8

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 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 communicates through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE™ protocols.

特点
  • 20-Bit ADC in SO-8 Package
  • 8ppm INL, No Missing Codes at 20 Bits
  • 4ppm Full-Scale Error
  • 0.5ppm Offset
  • 1.2ppm Noise
  • Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step
  • Fast Mode: 16-Bit Noise, 12 Bits TUE at 100sps
  • Internal Oscillator—No External Components Required
  • 110dB Min, 50Hz/60Hz Notch Filter
  • Reference Input Voltage: 0.1V to VCC
  • Live Zero—Extended Input Range Accommodates 12.5% Overrange and Underrange
  • Single Supply 2.7V to 5.5V Operation
  • Low Supply Current (200µA) and Auto Shutdown
  • Pin Compatible with 24-Bit LTC2400
典型应用
LTC2420 Typical Application
LTC2420 Typical Application
应用
  • Weight Scales
  • Direct Temperature Measurement
  • Gas Analyzers
  • Strain-Gage Transducers
  • Instrumentation
  • Data Acquisition
  • Industrial Process Control
  • 4-Digit DVMs
封装信息
LTC2420 Package Drawing
Order Information 订购型号
器件型号封装温度价格 (以 1 ~ 99 片为批量)价格 (以 1000 片为批量) *
LTC2420CS8#PBFSO-8C$5.10$4.25
LTC2420CS8#TRPBFSO-8C$4.30
LTC2420IS8#PBFSO-8I$5.50$4.70
LTC2420IS8#TRPBFSO-8I$4.75
演示电路板
器件型号描述价格
DC344ALTC2420CS8 | 20 Bit Delta Sigma ADC with Turbo Mode (with Diskette, Requires Win95/98)$50.00
数据表
应用指南
可靠性数据
产品选择卡
LT Journal
CAD 符号
相关产品
LTC2420 - 20-Bit µPower No Latency Delta-Sigma ADC in SO-8
AN96 - Delta Sigma ADC Bridge Measurement Techniques
R380 Reliability Data
No Latency Delta-Sigma™ ADCs
May 2001 No Latency Delta-Sigma ADC Techniques for Optimized Performance
LTC2420 Footprints and Symbols