LTC2421 1-/2-Channel 20-Bit µPower No Latency Delta Sigma™ ADCs in MSOP-10

The LTC®2421/LTC2422 are 1- and 2-channel 2.7V to 5.5V micropower 20-bit analog-to-digital converters with an integrated oscillator, 8ppm INL and 1.2ppm RMS noise. These ultrasmall devices use delta-sigma technology and a new digital filter architecture that settles in a single cycle. This eliminates the latency found in conventional DeltaSigma converters and simplifies multiplexed applications.

Through a single pin, the LTC2421/LTC2422 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 120Hz. The internal oscillator requires no external frequency setting components.

These converters accept an external reference voltage from 0.1V to VCC. With an extended input conversion range of –12.5% VREF to 112.5% VREF (VREF = FSSET – ZSSET), the LTC2421/LTC2422 smoothly resolve the offset and overrange problems of preceding sensors or signal conditioning circuits.

The LTC2421/LTC2422 communicate through a 2- or 3-wire digital interface that is compatible with SPI and MICROWIRE™ protocols

产品特点 Features
  • 20-Bit ADCs in Tiny MSOP-10 Packages
  • 1- or 2-Channel Inputs
  • Single Supply 2.7V to 5.5V Operation
  • Low Supply Current (200µA) and Auto Shutdown
  • Automatic Channel Selection (Ping-Pong) (LTC2422)
  • No Latency: Digital Filter Settles in a Single Conversion Cycle
  • 8ppm INL, No Missing Codes
  • 4ppm Full-Scale Error
  • 0.5ppm Offset
  • 1.2ppm Noise
  • Zero Scale and Full Scale Set for Reference and Ground Sensing
  • 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
  • Pin Compatible with LTC2401/LTC2402
封装
LTC2421 封装
应用
  • Weight Scales
  • Direct Temperature Measurement
  • Gas Analyzers
  • Strain Gauge Transducers
  • Instrumentation
  • Data Acquisition
  • Industrial Process Control
典型应用图
LTC2421 典型应用
参数
LTC2421 参数
LTC2421 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LTC2421CMS MSOP 10 C $5.40  $4.35 
LTC2421CMS#PBF MSOP 10 C $5.40  $4.35 
LTC2421CMS#TR MSOP 10 C $4.41 
LTC2421CMS#TRPBF MSOP 10 C $4.41 
LTC2421IMS MSOP 10 I $6.10  $4.90 
LTC2421IMS#PBF MSOP 10 I $6.10  $4.90 
LTC2421IMS#TR MSOP 10 I $4.96 
LTC2421IMS#TRPBF MSOP 10 I $4.96 
LTC2421 数据手册及相关资料下载
  1. 数据手册(英文) : LTC2421/LTC2422 - 1-/2-Channel 20-Bit µPower No Latency Delta Sigma ADCs in MSOP-10.PDF
  2. 可靠性数据 : R380 Reliability Data .PDF
  3. 产品选型卡 : No Latency Delta-Sigma™ ADCs.PDF
  4. 产品选型卡 : Ultra-Tiny 16-Bit ΔΣ ADC Family.PDF
  5. LT Journal: Mar 2007 - Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort.PDF