LTM2893 - 100MHz Isolated ADC Serial Interface
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Typical Application

LTM2893 Typical Application


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.


15mm x 6.25mm x 2.06mm BGA

LTM2893 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTM2893IY#PBF BGA 36 I $14.06 $9.85
LTM2893IY-1#PBF BGA 36 I $14.06 $9.85
LTM2893HY-1#PBF BGA 36 H $16.88 $11.81
LTM2893CY#PBF BGA 36 C $12.79 $8.95
LTM2893HY#PBF BGA 36 H $16.88 $11.81
LTM2893CY-1#PBF BGA 36 C $12.79 $8.95
* 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
DC2542A LTC2358-18, LTM2893, ADA4522-1, LT6658 Demo Board | Isolated Industrial Data Acquisition Board (req ArrowSoCkit) $300.00

Companion Boards

Part Number Description Price Documentation
DC2026C Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform $75.00
DC590B Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards $50.00
DC890B USB Data Acquisition Controller, for PScope Evaluation Kits (up to 250Mbps, CMOS/LVDS) $300.00