LTC2422 - 1-/2-Channel 20-Bit µPower No Latency Delta Sigma ADCs in MSOP-10

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.

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
Typical Application

Applications
  • Weight Scales
  • Direct Temperature Measurement
  • Gas Analyzers
  • Strain Gauge Transducers
  • Instrumentation
  • Data Acquisition
  • Industrial Process Control
Packaging

Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC2422CMS#PBFMS-10C$5.55$4.50
LTC2422CMS#TRPBFMS-10C$4.51
LTC2422IMS#PBFMS-10I$6.25$5.05
LTC2422IMS#TRPBFMS-10I$5.11
Demo Boards
Part NumberDescriptionPrice
DC2026C-KITDC2026C with DC934A | Linduino One Isolated Arduino-Compatible Demonstration Board with LTC2607/LTC2422 (DC934A) Demo Board$125.00
DC934ALTC2607 Demo Board | Dual 16-bit, I2C Vout DAC (req DC2026)$50.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
Datasheet
Application Note
Design Note
Reliability Data
Product Selector Card
Linduino
Related Product
LTC2421/LTC2422 - 1-/2-Channel 20-Bit µPower No Latency Delta Sigma ADCs in MSOP-10
LTC2422 Package Drawing LTC2422
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R380 Reliability Data
No Latency Delta-Sigma™ ADCs
LTC2422 Footprints and Symbols