Analog Devices Inc. LTC2368CMS-24#PBF

Overview

LTC2368CMS-24#PBF from Analog Devices (formerly Linear Technology) is a 24-bit, 1 Msps pseudo-differential unipolar successive approximation register (SAR) ADC with integrated real-time digital averaging filter. It operates from a single 2.5V supply, accepts 0V to VREF input (VREF = 2.5V–5.1V), achieves ±4.5 ppm INL max and no missing codes, and delivers 98 dB SNR at full speed-targeted for high-precision seismology and medical imaging front-ends.

For engineers reviewing the LTC2368CMS-24#PBF datasheet, LTC2368CMS-24#PBF pinout, LTC2368CMS-24#PBF application, or LTC2368CMS-24#PBF equivalent, key selection criteria include guaranteed 24-bit no-missing-codes operation, integrated averaging (1–65536 samples), SPI-compatible 1.8V–5V I/O with daisy-chain mode, and MSOP-16 package compatibility with industrial temperature range (0°C to 70°C).

Technical Context

The LTC2368CMS-24#PBF implements a charge-redistribution SAR architecture with a 24-bit CDAC and differential comparator, sampling the IN+/IN– voltage difference against VREF. Its integrated digital filter performs real-time averaging without configuration registers-dynamically scaling dynamic range from 98 dB at 1 Msps to 140 dB at 15.25 sps.

It uses dual supplies: VDD (2.375–2.625 V) powers the core ADC and reference buffer, while OVDD (1.71–5.25 V) sets logic levels for SPI interface (SCK, SDO, RDL/SDI, BUSY, CNV, CHAIN). The pseudo-differential input structure rejects common-mode noise up to 83 dB at 500 kHz, and acquisition time is fixed at 312 ns.

Key Specifications

Pinout & Package

Package: 16-lead MSOP (4.0 mm × 3.0 mm × 1.1 mm), lead-free, RoHS-compliant, rated for 0°C to 70°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution SAR ADC applications.

Compared with ADS127L01IPBSR and AD7616BSTZ, the LTC2368CMS-24#PBF uniquely combines 24-bit no-missing-codes assurance, real-time programmable averaging (1–65536), and daisy-chain SPI-making it the only option for applications demanding both metrology-grade resolution and flexible, hardware-accelerated dynamic range scaling without external processing.

Availability

LTC2368CMS-24#PBF is available at Aetrix Electronics and suitable for seismology data acquisition, medical imaging detector readout, and high-speed industrial process control requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2368CMS-24#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2368-24 product line was designed for precision instrumentation requiring guaranteed 24-bit performance, ultra-low distortion, and integrated digital filtering-targeting applications where external DSP adds cost, latency, or reliability risk.

FAQ

What is the maximum sampling rate of the LTC2368CMS-24#PBF?

The LTC2368CMS-24#PBF supports a maximum sampling rate of 1 Msps (1 million samples per second) across its full operating temperature range (0°C to 70°C). At this rate, conversion time is guaranteed ≤675 ns, and the device achieves 98 dB SNR and ±4.5 ppm INL. The part automatically enters power-down mode between conversions to maintain 21 mW typical power dissipation even at full speed.

Does the LTC2368CMS-24#PBF require external configuration registers to use its digital averaging feature?

No, the LTC2368CMS-24#PBF does not require external configuration registers or programming interfaces to use its digital averaging feature. The number of averages (1 to 65536) is controlled solely by the timing relationship between the CNV and SCK signals-no SPI writes or register access is needed. This hardware-only implementation ensures deterministic latency and eliminates firmware dependencies in safety-critical systems.

What is the input voltage range for IN+ and IN– on the LTC2368CMS-24#PBF?

For the LTC2368CMS-24#PBF, the IN+ pin accepts a pseudo-differential unipolar input range of 0 V to VREF (where VREF is externally supplied from 2.5 V to 5.1 V). The IN– pin serves as a ground-sense reference with an absolute input range of –0.1 V to +0.1 V relative to GND. This architecture enables common-mode rejection without requiring matched differential drivers.

Can the LTC2368CMS-24#PBF interface directly with a 1.8 V microcontroller SPI port?

Yes, the LTC2368CMS-24#PBF can interface directly with a 1.8 V microcontroller SPI port. Its OVDD pin accepts 1.71 V to 5.25 V, setting logic thresholds for all digital I/O pins (SCK, SDO, RDL/SDI, BUSY, CNV, CHAIN). When OVDD = 1.8 V, VIH is 1.44 V min and VIL is 0.36 V max-fully compatible with standard 1.8 V CMOS logic levels without level-shifting circuitry.

What package type and temperature grade does the LTC2368CMS-24#PBF use?

The LTC2368CMS-24#PBF uses a 16-lead MSOP (Mini Small Outline Package) measuring 4.0 mm × 3.0 mm × 1.1 mm, with lead-free (Pb-free) finish and RoHS compliance. It is specified for the commercial temperature range of 0°C to 70°C, as indicated by the "C" grade in the ordering part number and confirmed in the manufacturer's order information table.