Analog Devices Inc. LTM2893IY-1#PBF

Overview

LTM2893IY-1#PBF from Analog Devices is a high-speed isolated μModule SPI interface optimized for simultaneous-sampling ADCs such as the LTC2348 family, providing read/write capability, 100MHz SPI-compatible I/O, 30psRMS aperture jitter on CNV→CNV2, and three isolated multiplexer select signals (SA2/SB2/SC2) - deployed in industrial process control and high-speed data acquisition systems requiring reinforced isolation.

For engineers reviewing the LTM2893IY-1#PBF datasheet, LTM2893IY-1#PBF pinout, LTM2893IY-1#PBF application, or LTM2893IY-1#PBF equivalent, key selection criteria include its -40°C to +85°C operating range, 6000VRMS isolation rating, configurable 8–32-bit SPI word length, and support for write-back configuration of ADCs - critical for deterministic timing in multi-channel synchronized sampling architectures.

Technical Context

The LTM2893IY-1#PBF implements dual-domain SPI isolation with independent logic-side (VL/VCC) and isolated-side (VL2/VCC2) power domains, using coreless transformer-based μModule technology to encode/decode signals across the barrier with error checking and fail-safe shutdown. It features dedicated CSC-controlled configuration register access for SCK2 frequency, word length, device count, and select signal direction.

Unlike the read-only LTM2893, the LTM2893-1 variant supports two-phase transactions: first reading ADC results via MISOA2/MISOB2, then writing configuration data via MOSI2 - enabling dynamic gain/offset calibration and channel mapping in simultaneous-sampling ADCs like the LTC2348. Timing-critical paths (CNV→CNV2, BUSY2→BUSY) are hardened against >50kV/µs common-mode transients.

Key Specifications

Pinout & Package

36-pin BGA package (15mm × 6.25mm × 2.06mm), RoHS-compliant SAC305 ball finish, MSL Level 3, with top-side thermal pad for enhanced heat dissipation (θJA = 36°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated SPI interface applications.

Compared with ADUM6420AARWZ and ISO1540DR, the LTM2893IY-1#PBF uniquely integrates ADC-specific timing control, low-jitter conversion triggering, and configurable SPI bridging in a single μModule - eliminating FPGA logic overhead and guaranteeing sub-100ps inter-channel synchronization for simultaneous-sampling systems.

Availability

LTM2893IY-1#PBF is available at Aetrix Electronics and suitable for industrial process control, test and measurement equipment, and high-speed data acquisition requiring stable component supply, long-term lifecycle assurance, and certified reinforced isolation.

Supply support for LTM2893IY-1#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTM2893IY-1#PBF belongs to Analog Devices' isolated μModule product line, engineered specifically to simplify high-speed, high-precision ADC interfacing in noise-sensitive and safety-critical applications - reducing design risk and time-to-market for isolated data acquisition systems.

FAQ

What distinguishes LTM2893IY-1#PBF from the standard LTM2893?

The LTM2893IY-1#PBF implements read/write functionality via its MOSI2 output and CSC-configurable register, enabling dynamic ADC configuration writes (e.g., gain, offset, channel setup) after each data read - unlike the read-only LTM2893. This is essential for simultaneous-sampling ADCs like the LTC2348 that require per-conversion parameter updates. The LTM2893IY-1#PBF also supports extended watchdog timing for SS framing in high-throughput modes.

Does LTM2893IY-1#PBF support 1.8V logic interfaces on both sides?

Yes, LTM2893IY-1#PBF supports VL and VL2 supply ranges from 1.71V to 5.5V, fully accommodating 1.8V I/O standards on both logic and isolated sides. Input thresholds scale with VL/VL2 (VIH = 0.8×VL, VIL = 0.2×VL), and output drive strength (VOH/VOL) is specified down to 1.71V - ensuring robust interoperability with 1.8V FPGAs and ADCs without level shifters.

How does LTM2893IY-1#PBF achieve 30psRMS aperture jitter?

LTM2893IY-1#PBF achieves 30psRMS CNV→CNV2 jitter through proprietary coreless transformer isolation with ultra-low-skew encoding/decoding circuitry and on-die timing calibration. The path avoids PLLs or clock dividers, directly transferring the CNV edge with minimal added uncertainty - verified across –40°C to +85°C and 1.71–5.5V supply ranges per datasheet Figure G05–G06.

Can LTM2893IY-1#PBF isolate multiple ADCs in parallel?

Yes, LTM2893IY-1#PBF supports multi-ADC configurations via its BUSYS input (P6), which accepts secondary ADC BUSY signals to coordinate read timing across daisy-chained units. Its three isolated select outputs (SA2/SB2/SC2) can independently control analog multiplexers per ADC channel, enabling scalable 8+ channel synchronized acquisition without additional isolation components.

What safety certifications apply to LTM2893IY-1#PBF?

LTM2893IY-1#PBF carries UL 1577 certification (File #255632) for 6000VRMS isolation, CSA approval to IEC/UL 60950-1 and 62368-1 (reinforced insulation at 455VRMS), and IEC 60601-1 compliance for 2 MOPP medical isolation at 287.5VRMS. All ratings are validated per dielectric, partial discharge, CTI (600VRMS), and creepage (9.2mm) requirements in the official datasheet.