LTM2893 - 100MHz Isolated ADC Serial Interface

Features

  • Isolated Interface: 6000VRMS for 1 Minute
  • UL-CSA Recognition Pending
  • 100MHz SPI-Compatible I/O
  • Configurable SPI Word Length 8 to 32 Bits
  • Low Jitter Conversion Start (30psRMS)
  • Supports Simultaneously Sampled ADCs
  • Read Only (LTM2893), Read/Write (LTM2893-1)
  • Three Isolated Multiplexer Select Signals
  • 1.71V to 5.5V I/O Voltages
  • 3V to 5.5V Supply Voltages
  • High Common Mode Transient Immunity
  • 15mm × 6.25mm BGA Package

Typical Application

LTM2893 Typical Application

Description

The LTM®2893 is a high speed isolated μModule (micromodule) SPI interface with ADC control signals. The LTM2893 is optimized for isolating 1Msps high resolution 18-bit SAR ADCs, such as the LTC2338 and similar families, and can interface with most general purpose ADCs. The LTM2893-1 is optimized for isolating the LTC2348 and similar families of simultaneous sampling ADCs that require writing configuration settings into the ADC. LTM2893 isolates the conversion start, sampling signal, with very low aperture jitter (30ps) and low latency (20ns).

The interface enables fast throughput with no cycle latency, which makes the LTM2893 ideally suited for a wide variety of applications. The LTM2893 has a high speed SPI-compatible serial port that supports 1.71V to 5.5V logic and is configurable for ADCs with 8 to 32 bit SPI word lengths. It also isolates three select signals (SA, SB, SC) for controlling analog multiplexers or gain settings.

The isolation barrier tolerates large voltage ground variations between the logic interface and the isolated side of the LTM2893. Uninterrupted communication is maintained during voltage transients greater than 50kV/μs.

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTM2893CY-1#PBF 15mm x 6.25mm x 2.06mm BGA BGA C 05-08-1987 Yes
LTM2893CY#PBF 15mm x 6.25mm x 2.06mm BGA BGA C 05-08-1987 Yes
LTM2893HY-1#PBF 15mm x 6.25mm x 2.06mm BGA BGA H 05-08-1987 Yes
LTM2893HY#PBF 15mm x 6.25mm x 2.06mm BGA BGA H 05-08-1987 Yes
LTM2893IY-1#PBF 15mm x 6.25mm x 2.06mm BGA BGA I 05-08-1987 Yes
LTM2893IY#PBF 15mm x 6.25mm x 2.06mm BGA BGA I 05-08-1987 Yes


LTM2893 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
LTM2893CY-1#PBF 15mm x 6.25mm x 2.06mm BGA C $12.79 $8.95 Yes
LTM2893CY#PBF 15mm x 6.25mm x 2.06mm BGA C $12.79 $8.95 Yes
LTM2893HY-1#PBF 15mm x 6.25mm x 2.06mm BGA H $16.88 $11.81 Yes
LTM2893HY#PBF 15mm x 6.25mm x 2.06mm BGA H $16.88 $11.81 Yes
LTM2893IY-1#PBF 15mm x 6.25mm x 2.06mm BGA I $14.06 $9.85 Yes
LTM2893IY#PBF 15mm x 6.25mm x 2.06mm BGA I $14.06 $9.85 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.

Part Number Description Price Documentation
DC2405A LTM2893 Demo Board | 100MHz SPI uModule Isolator $150.00
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Click here to view our complete list of demo boards

Applications

  • Remote Sensing
  • High Speed Data Acquisition
  • Industrial Process Control
  • Test and Measurement Equipment

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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 IV - 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