LTC2461

PRODUCTION

Differential Ultra-Tiny, 16-Bit I2C ΔΣ ADCs with 10ppm/°C Max Precision Reference

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Overview

  • 16-Bit Resolution, No Missing Codes
  • Internal Reference, High Accuracy 10ppm/°C (Max)
  • Single-Ended (LTC2461) or Differential (LTC2463)
  • 2LSB Offset Error (Typ)
  • 0.01% Gain Error (Typ)
  • 60 Conversions Per Second
  • Single Conversion Settling Time for Multiplexed Applications
  • 1.5mA Supply Current
  • 200nA Sleep Current
  • Internal Oscillator—No External Components Required
  • 2-Wire I2C Interface with Two Addresses Plus One Global Address for Synchronization
  • Ultra-Tiny, 12-Lead, 3mm × 3mm DFN and MSOP Packages

The LTC2461/LTC2463 are ultra tiny, 16-Bit analog to digital converters with an integrated precision reference. They use a single 2.7V to 5.5V supply and communicate through an I2C Interface. The LTC2461 is single-ended with a 0V to 1.25V input range and the LTC2463 is differential with a 1.25V input range. Both ADCs include a 1.25V integrated reference with 2ppm/°C drift performance and 0.1% initial accuracy. The converters are available in a 12-pin 3mm × 3mm DFN package or an MSOP-12 package. They include an integrated oscillator and perform conversions with no latency for multiplexed applications. The LTC2461/LTC2463 include a proprietary input sampling scheme that reduces the average input current several orders of magnitude when compared to conventional delta sigma converters.

Following a single conversion, the LTC2461/LTC2463 automatically power down the converter and can also be configured to power down the reference. When both the ADC and reference are powered down, the supply current is reduced to 200nA.

The LTC2461/LTC2463 can sample at 60 conversions per second and, due to the very large oversampling ratio, have extremely relaxed antialiasing requirements. Both include continuous internal offset and fullscale calibration algorithms which are transparent to the user, ensuring accuracy over time and the operating temperature range.

Applications

  • System Monitoring
  • Environmental Monitoring
  • Direct Temperature Measurements
  • Instrumentation
  • Data Acquisition
  • Embedded ADC Upgrades

LTC2461
Differential Ultra-Tiny, 16-Bit I2C ΔΣ ADCs with 10ppm/°C Max Precision Reference
VREF vs Temperature Product Package 1 Product Package 2 Product Package 3 Product Package 4
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Documentation

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources


Hardware Ecosystem

Parts Product Life Cycle Description
Analog to Digital Converters (ADCs) 1
LTC2990 RECOMMENDED FOR NEW DESIGNS Quad I2C Voltage, Current and Temperature Monitor
Interface Transceivers & Isolators 1
LTM2883 PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
Level Translators & Buffers 1
LTC4317 PRODUCTION Dual I2C/SMBus Address Translator
Matched Resistors & Transistors 1
LT5400 RECOMMENDED FOR NEW DESIGNS Quad Matched Resistor Network
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Tools & Simulations


Evaluation Kits

eval board
DC1491A

LTC2461 Demo Board | 16-Bit I2C Single-Ended ∆Σ ADC with 10ppm Max Internal Reference, Requires DC2026

Product Details

Demonstration circuit 1491A features the LTC2461, a 16 bit high performance ΔΣ analog-to-digital converter (ADC) with an I2C interface. The input is single-ended with a range of 0 to REF. The modulator’s proprietary sampling technique reduces the average input current to less than 50nA–orders of magnitude lower than typical delta sigma ADCs.

DC1491A
LTC2461 Demo Board | 16-Bit I2C Single-Ended ∆Σ ADC with 10ppm Max Internal Reference, Requires DC2026
DC1491A - Schematic

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