LTC2430 20-Bit No Latency Delta Sigma™ ADCs with Differential Input and Differential Reference

The LTC®2430/LTC2431 are 2.7V to 5.5V micropower 20-bit differential Delta Sigma analog-to-digital converters with an integrated oscillator, 3ppm INL and 0.56ppm RMS noise. They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2430/LTC2431 can be configured for better than 110dB differential mode rejection at 50Hz or 60Hz ±2%, or they can be driven by an external oscillator for a user-defined rejection frequency. The internal oscillator requires no external frequency setting components.

The converters accept any external differential reference voltage from 0.1V to VCC for flexible ratiometric and remote sensing measurement configurations. The fullscale differential input range is from –0.5VREF to 0.5VREF. The reference common mode voltage, VREFCM, and the input common mode voltage, VINCM, may be independently set anywhere within GND to VCC. The DC common mode input rejection is better than 120dB.

The LTC2430/LTC2431 communicate through a flexible 3-wire digital interface that is compatible with SPI and MICROWIRE™ protocols

产品特点 Features
  • Low Supply Current (200µA in Conversion Mode and 4µA in Autosleep Mode)
  • Differential Input and Differential Reference with GND to VCC Common Mode Range
  • 3ppm INL, No Missing Codes
  • 10ppm Full-Scale Error and 1ppm Offset
  • 0.56ppm Noise, 20.8 ENOBs
  • No Latency: Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step
  • Single Supply 2.7V to 5.5V Operation
  • Internal Oscillator—No External Components Required
  • 110dB Min, 50Hz/60Hz Notch Filter
  • Pin Compatible with 24-Bit LTC2410/LTC2411
封装
LTC2430 封装
应用
  • Direct Sensor Digitizer
  • Weight Scales
  • Direct Temperature Measurement
  • Gas Analyzers
  • Strain Gauge Transducers
  • Instrumentation
  • Data Acquisition
  • Industrial Process Control
  • DVMs and Meters
典型应用图
LTC2430 典型应用
参数
LTC2430 参数
LTC2430 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) *
LTC2430CGN SSOP 16 C $4.40  $3.55 
LTC2430CGN#PBF SSOP 16 C $4.40  $3.55 
LTC2430CGN#TR SSOP 16 C $3.61 
LTC2430CGN#TRPBF SSOP 16 C $3.61 
LTC2430IGN SSOP 16 I $4.75  $3.90 
LTC2430IGN#PBF SSOP 16 I $4.75  $3.90 
LTC2430IGN#TR SSOP 16 I $3.96 
LTC2430IGN#TRPBF SSOP 16 I $3.96 
LTC2430 数据手册及相关资料下载
  1. 数据手册(英文) : LTC2430/LTC2431 - 20-Bit No Latency Delta Sigma ADCs with Differential Input and Differential Reference.PDF
  2. 设计要点 (英文) : DN237 - 1- and 2-Channel No Latency Delta Sigma, 24-Bit ADCs Easily Digitize a Variety of Sensors, Part 2.PDF
  3. 可靠性数据 : R380 Reliability Data .PDF
  4. 产品选型卡 : No Latency Delta-Sigma™ ADCs.PDF
  5. 产品选型卡 : Ultra-Tiny 16-Bit ΔΣ ADC Family.PDF
  6. LT Journal: Mar 2007 - Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort.PDF