LTC2435/LTC2435-1 - 20-Bit No Latency ΔΣ™ ADCs with Differential Input and Differential Reference

Features

  • 2x Speed Up Version of the LTC2430: 15Hz Output Rate, 60Hz Notch—LTC2435; 13.75Hz Output Rate, Simultaneous 50Hz/60Hz Notch-LTC2435-1
  • Differential Input and Differential Reference with GND to VCC Common Mode Range
  • 3ppm INL, No Missing Codes
  • 10ppm Gain Error
  • 0.8ppm Noise
  • Single Conversion Settling Time for Multiplexed Applications
  • Internal Oscillator—No External Components Required
  • 20-Bit ADC in Narrow SSOP-16 Package
    (SO-8 Footprint)
  • Single Supply 2.7V to 5.5V Operation
  • Low Supply Current (200µA,4µA in Auto Sleep)

Typical Application

LTC2435 Typical Application
LTC2435 Typical Application

Description

The LTC®2435/2435-1 are 2.7V to 5.5V micropower 20-bit differential Delta Sigma analog to digital converters with integrated oscillator, 3ppm INL and 0.8ppm RMS noise. They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2435 can be configured for better than 110dB input differential mode rejection at 50Hz or 60Hz ±2%, or it can be driven by an external oscillator for a user defined rejection frequency. The LTC2435-1 can be configured for better than 87dB input differential mode rejection over the range of 49Hz to 61.2Hz (50Hz and 60Hz ±2% simultaneously). 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 the GND to VCC range of the LTC2435/LTC2435-1. The DC common mode input rejection is better than 120dB.

The LTC2435/LTC2435-1 communicate through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE™ protocols.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC2435-1CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC2435-1CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC2435-1IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC2435-1IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC2435CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC2435CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC2435IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC2435IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes


LTC2435 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC2435-1CGN#PBF SSOP-16 C $4.40 $3.55 Yes
LTC2435-1CGN#TRPBF SSOP-16 C $3.61 Yes
LTC2435-1IGN#PBF SSOP-16 I $4.75 $3.90 Yes
LTC2435-1IGN#TRPBF SSOP-16 I $3.96 Yes
LTC2435CGN#PBF SSOP-16 C $4.40 $3.55 Yes
LTC2435CGN#TRPBF SSOP-16 C $3.61 Yes
LTC2435IGN#PBF SSOP-16 I $4.75 $3.90 Yes
LTC2435IGN#TRPBF SSOP-16 I $3.96 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Direct Sensor Digitizer
  • Weight Scales
  • Direct Temperature Measurement
  • Gas Analyzers
  • Strain Gage Transducers
  • Instrumentation
  • Data Acquisition
  • Industrial Process Control
  • 6-Digit DVMs

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support