Analog Devices Inc. LTC2376CMS-20#PBF

Overview

LTC2376CMS-20#PBF from Analog Devices (formerly Linear Technology) is a 20-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with ±0.5ppm typical INL, 104dB SNR at 2kHz, and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5V VDD supply, supports ±VREF fully differential input (VREF = 2.5V to 5.1V), and consumes only 5.3mW at full throughput - enabling high-precision data acquisition in medical imaging and portable instrumentation.

For engineers reviewing the LTC2376CMS-20#PBF datasheet, LTC2376CMS-20#PBF pinout, LTC2376CMS-20#PBF application, or LTC2376CMS-20#PBF equivalent, key selection considerations include guaranteed 20-bit no-missing-codes performance, daisy-chain SPI interface compatibility across 1.8V–5V logic, internal conversion clock, and DGC-enabled 0.5V–4.5V input range with 5V reference.

Technical Context

The LTC2376CMS-20#PBF implements a charge-redistribution SAR architecture with a 20-bit CDAC and differential comparator, achieving no pipeline delay and zero cycle latency. Its internal oscillator eliminates external timing dependencies, while auto power-down between conversions scales quiescent current from 2.5mA at 250ksps to 90µA in idle state.

Digital gain compression (DGC) is implemented via on-chip digital scaling: when REF/DGC is grounded, zero-scale maps to 0.1·VREF and full-scale to 0.9·VREF, preserving 20-bit resolution while allowing single-rail amplifier biasing. The ADC accepts fully differential inputs with ±VREF range, 34MHz –3dB input bandwidth, and 4ps aperture jitter - supporting high-fidelity sampling of baseband and IF signals.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP (3mm × 4.9mm), exposed pad not present - suitable for space-constrained industrial and portable designs with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS127L01IPBS and AD7626BCPZ-RL7, the LTC2376CMS-20#PBF uniquely balances 20-bit resolution, 250ksps throughput, and DGC-enabled single-supply operation - making it optimal for portable, battery-constrained systems requiring both speed and metrology-grade linearity without external level-shifting or dual supplies.

Availability

LTC2376CMS-20#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, high-speed industrial data acquisition, and portable precision instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2376CMS-20#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2376-20 belongs to ADI's precision SAR ADC product line, designed specifically for applications demanding 20-bit resolution, low power, and seamless integration with single-supply signal conditioning - such as portable diagnostics, automated test equipment, and high-fidelity data loggers.

FAQ

What is the maximum sampling rate supported by the LTC2376CMS-20#PBF?

The LTC2376CMS-20#PBF supports a maximum sampling rate of 250 ksps, with guaranteed timing performance across its full operating temperature range (0°C to 70°C). This rate is enabled by an internal oscillator and zero-cycle-latency architecture, allowing deterministic conversion timing without external clock management. At this rate, the LTC2376CMS-20#PBF achieves 104 dB SNR and ±2 ppm INL, making it suitable for real-time high-fidelity signal capture in applications like medical imaging and industrial process monitoring.

How does Digital Gain Compression (DGC) work in the LTC2376CMS-20#PBF?

Digital Gain Compression (DGC) in the LTC2376CMS-20#PBF is activated by grounding the REF/DGC pin. When enabled, the ADC digitally remaps its transfer function so that zero-scale corresponds to 0.1·VREF and full-scale to 0.9·VREF - effectively compressing the usable input range to 0.5V–4.5V with a 5V reference. This preserves all 20 bits of resolution while eliminating the need for a negative supply on the driving amplifier, enabling single 5.5V rail operation. The LTC2376CMS-20#PBF maintains identical INL and SNR specifications in both DGC and standard modes.

What package type is used for the LTC2376CMS-20#PBF?

The LTC2376CMS-20#PBF uses a 16-lead plastic MSOP (Mini Small Outline Package) measuring 3mm × 4.9mm, with no exposed thermal pad. This package is RoHS-compliant and lead-free (PBF suffix), rated for operation from 0°C to 70°C. It features four dedicated GND pins to minimize noise coupling and supports standard surface-mount assembly processes. The MSOP footprint is distinct from the 4mm × 3mm DFN variant (e.g., LTC2376CDE-20#PBF), and pin compatibility is confirmed only within the same package family.

Does the LTC2376CMS-20#PBF require an external reference voltage?

Yes, the LTC2376CMS-20#PBF requires an external reference voltage applied to the REF pin, which must be in the range of 2.5V to 5.1V. The device does not include an internal reference. A high-stability, low-noise reference source (e.g., LT6657, ADR4550) is recommended, with mandatory 47µF X7R ceramic decoupling placed directly at the REF pin. Reference current draw is 0.24–0.3 mA at 250ksps, scaling linearly with sample rate. Using the specified external reference ensures the LTC2376CMS-20#PBF achieves its guaranteed ±2 ppm INL and 104 dB SNR performance.

Can multiple LTC2376CMS-20#PBF devices be connected in daisy-chain mode?

Yes, the LTC2376CMS-20#PBF supports daisy-chain configuration via its CHAIN pin and RDL/SDI pin functionality. When CHAIN is driven high, RDL/SDI becomes a serial data input, allowing cascaded connection of multiple LTC2376CMS-20#PBF devices on a shared SPI bus. Each device shifts its 20-bit result into the next in sequence on SCK rising edges, enabling synchronized multi-channel sampling with minimal GPIO usage. Daisy-chain timing is characterized with t_SCKCH = 13.5 ns minimum, supporting high-speed readout without additional framing overhead. This mode is fully supported in the LTC2376CMS-20#PBF's specified operating conditions.