Analog Devices Inc. DC1783A-C

Overview

LTC2377-16 from Analog Devices (formerly Linear Technology) is a 16-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with ±0.5LSB INL max, 97dB SNR at 2kHz, and fully differential ±VREF input range (2.5V–5.1V). It operates from a single 2.5V supply, consumes only 6.8mW at full speed, and features digital gain compression (DGC) to enable single-supply amplifier driving - used in high-speed data acquisition systems requiring precision, low power, and wide dynamic range.

For engineers reviewing the LTC2377-16 datasheet, LTC2377-16 pinout, LTC2377-16 application, or LTC2377-16 equivalent, key selection considerations include its no-missing-codes 16-bit resolution, SPI-compatible daisy-chain interface, internal conversion clock, guaranteed operation to 125°C, and DGC-enabled 0.5V–4.5V input range with 5V reference.

Technical Context

The LTC2377-16 implements a charge-redistribution SAR architecture with a 16-bit CDAC and differential comparator, supporting true bipolar input sampling without pipeline latency or cycle delay. Its conversion timing is governed by an internal oscillator, eliminating external clock dependency for core timing.

Digital Gain Compression (DGC) is implemented via dedicated REF/DGC pin control, enabling zero-scale mapping to 0.1×VREF and full-scale to 0.9×VREF - preserving 16-bit resolution while relaxing analog driver supply requirements. The device supports 1.8V–5V I/O logic levels via separate OVDD rail and offers daisy-chain mode via CHAIN and RDL/SDI pins.

Key Specifications

Pinout & Package

Available in 16-lead MSOP and 4mm × 3mm DFN packages; both feature exposed thermal pad (GND) for enhanced thermal performance. DFN package includes Pin 17 (exposed pad) soldered to PCB ground plane.

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 LTC2377-16 uniquely balances 16-bit precision, 500ksps throughput, ultra-low power, and DGC-enabled analog simplicity - making it optimal for thermally constrained, single-supply, high-reliability embedded systems.

Availability

LTC2377-16 is available at Aetrix Electronics and suitable for medical imaging signal chains, industrial process monitoring, and portable test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC2377-16 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 LTC2377-16 belongs to ADI's precision SAR ADC product line, designed specifically for applications demanding high resolution, low power, and robust operation in thermally demanding or battery-powered environments.

FAQ

What is the maximum sampling rate of the LTC2377-16, and does it incur pipeline latency?

The LTC2377-16 achieves a maximum sampling rate of 500ksps with no pipeline delay or cycle latency - each conversion completes within 1.5µs and the next sample can be triggered immediately. This real-time behavior is intrinsic to its SAR architecture and makes the LTC2377-16 suitable for closed-loop control and time-critical acquisition where deterministic timing is mandatory.

How does Digital Gain Compression (DGC) work in the LTC2377-16, and what is its practical benefit?

In the LTC2377-16, DGC is activated by grounding the REF/DGC pin, which digitally remaps the zero-scale code to 0.1×V_REF and full-scale code to 0.9×V_REF. With a 5V reference, this yields a 0.5V–4.5V input range - allowing the use of single-supply op-amps like the LT6350 powered from +5.5V only, eliminating negative rails and reducing system complexity and cost.

Which package options are available for the LTC2377-16, and what are their thermal characteristics?

The LTC2377-16 is offered in two RoHS-compliant packages: 16-lead MSOP (θ_JA = 110°C/W) and 4mm × 3mm DFN (θ_JA = 40°C/W with exposed pad soldered to PCB ground). The DFN variant provides superior thermal performance and is recommended for high-temperature or high-power-density layouts where junction temperature must remain below 150°C.

Does the LTC2377-16 require an external clock, and how is timing controlled?

No - the LTC2377-16 integrates an internal oscillator that sets conversion time, eliminating the need for an external master clock. Timing is initiated solely by the CNV rising edge; BUSY indicates conversion progress, and SCK controls serial data readout. This simplifies timing design and improves system robustness against clock jitter and routing skew.

What are the absolute maximum ratings for the analog input pins (IN+, IN–) of the LTC2377-16?

The absolute maximum rating for IN+ and IN– is (GND –0.3V) to (REF + 0.3V). Exceeding these limits risks latch-up or permanent damage. For safe operation, the differential input voltage must stay within ±V_REF, and common-mode voltage must be maintained at V_REF/2 ±0.1V - verified in the Electrical Characteristics table under VIN+ and VIN– specifications.