Analog Devices Inc. DC1783A-A

Overview

LTC2380-16 from Analog Devices (formerly Linear Technology) is a 16-bit, 2 Msps successive approximation register (SAR) analog-to-digital converter with ±VREF fully differential input, 96.2 dB SNR, ±0.6 LSB INL max, and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5 V supply and supports reference voltages from 2.5 V to 5.1 V, targeting high-speed data acquisition in medical imaging and portable instrumentation.

For engineers reviewing the LTC2380-16 datasheet, LTC2380-16 pinout, LTC2380-16 application, or LTC2380-16 equivalent, key selection considerations include its no-cycle-latency 2 Msps throughput, guaranteed 16-bit no-missing-codes operation, DGC-enabled 0.5 V to 4.5 V input range with 5 V reference, 1.8 V–5 V I/O compatibility, and daisy-chain SPI interface for multi-channel systems.

Technical Context

The LTC2380-16 implements a charge redistribution capacitor DAC (CDAC) architecture with internal conversion clock, eliminating external timing dependencies. Its fully differential input stage accepts ±VREF signals with common-mode range centered at VREF/2 ± 0.1 V, and features 34 MHz –3 dB input bandwidth and 4 ps aperture jitter.

Digital Gain Compression (DGC) remaps zero-scale from 0 V to 0.1·VREF and full-scale from VREF to 0.9·VREF-enabling rail-to-rail single-supply amplifier drive without sacrificing resolution. The device supports both normal and daisy-chain SPI modes via the CHAIN pin, with SDO output in 2's complement format and BUSY signal indicating conversion status.

Key Specifications

Pinout & Package

Available in 16-lead MSOP and 4 mm × 3 mm DFN packages. Both packages feature exposed thermal pad (Pin 17 in DFN) soldered to GND for thermal management. Absolute max ratings include V_DD ≤ 2.8 V, OVDD ≤ 6 V, and analog input range of (GND − 0.05 V) to (V_REF + 0.05 V).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7960BCPZ and ADS8860IRGET, the LTC2380-16 uniquely balances 2 Msps throughput, 96.2 dB SNR, and DGC-enabled single-supply drive - making it optimal for portable, thermally constrained, and multi-channel systems where interface flexibility and power efficiency are prioritized over absolute resolution or maximum speed.

Availability

LTC2380-16 is available at Aetrix Electronics and suitable for medical imaging, high-speed data acquisition, and portable instrumentation requiring stable component supply, guaranteed 16-bit no-missing-codes performance, and extended temperature operation up to 125°C.

Supply support for LTC2380-16 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 LTC2380-16 belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding low noise, low power, and deterministic timing - including portable test equipment, medical diagnostics, and real-time process control.

FAQ

What is the maximum sampling rate of the LTC2380-16, and does it introduce pipeline latency?

The LTC2380-16 achieves a maximum sampling rate of 2 Msps with zero cycle latency and no pipeline delay. This means each conversion completes before the next CNV rising edge is sampled, enabling true real-time, deterministic acquisition. The internal oscillator governs conversion timing, so no external clock synchronization is required - a key advantage for time-critical control loops and glitch capture in the LTC2380-16.

How does Digital Gain Compression (DGC) work in the LTC2380-16, and what is its practical benefit?

In the LTC2380-16, DGC is enabled by grounding the REF/DGC pin, which digitally remaps the full-scale input range from ±V_REF to 0.1·V_REF–0.9·V_REF. With a 5 V reference, this yields a 0.5 V–4.5 V input span. This allows driving amplifiers like the LT6350 to operate from a single 5.5 V supply instead of requiring ±5 V rails - reducing power, complexity, and PCB area. The LTC2380-16 preserves full 16-bit resolution despite the compressed analog range.

What are the supported reference voltage and supply voltage ranges for the LTC2380-16?

The LTC2380-16 accepts reference voltages from 2.5 V to 5.1 V on the REF pin, defining its ±V_REF differential input range. Its core supply V_DD must be 2.375 V–2.625 V (nominal 2.5 V), while the I/O supply OVDD supports 1.71 V–5.25 V - enabling direct interfacing with 1.8 V, 2.5 V, 3.3 V, or 5 V logic without level shifters. All specifications for the LTC2380-16 are validated across these ranges.

Does the LTC2380-16 support daisy-chaining, and how is it configured?

Yes, the LTC2380-16 supports daisy-chain mode via the CHAIN pin (Pin 1). When CHAIN is high, the RDL/SDI pin functions as serial data input, allowing multiple LTC2380-16 devices to share one SPI bus. Conversion results cascade through SDO→SDI connections, with SCK synchronizing all devices. This eliminates address decoding overhead and simplifies multi-channel synchronization - a distinct capability of the LTC2380-16 not found in many competing SAR ADCs.

What package options and temperature grades are available for the LTC2380-16?

The LTC2380-16 is offered in two packages: 16-lead plastic MSOP and 4 mm × 3 mm plastic DFN with exposed thermal pad. Temperature grades include C-grade (0°C to 70°C), I-grade (–40°C to 85°C), and H-grade (–40°C to 125°C). H-grade variants (e.g., LTC2380HMS-16#PBF) are fully specified for INL, SNR, and timing across the full range - making the LTC2380-16 suitable for under-hood automotive or industrial edge computing deployments.