Analog Devices Inc. LTC2376CDE-18#PBF

Overview

LTC2376CDE-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with ±1.75LSB INL max, 102dB SNR at 2kHz, and fully differential ±VREF input range (2.5V–5.1V reference). It operates from a single 2.5V supply, consumes only 3.4mW at full speed, and features digital gain compression (DGC) to enable single-supply amplifier driving - used in high-precision data acquisition systems requiring low noise and guaranteed no missing codes.

For engineers reviewing the LTC2376CDE-18#PBF datasheet, LTC2376CDE-18#PBF pinout, LTC2376CDE-18#PBF application, or LTC2376CDE-18#PBF equivalent, key selection considerations include its 16-pin 4mm × 3mm DFN package, daisy-chain SPI interface supporting 1.8V–5V I/O, internal conversion clock, zero-cycle latency operation, and guaranteed 18-bit monotonicity across 0°C to 70°C.

Technical Context

The LTC2376CDE-18#PBF implements a charge-redistribution SAR architecture with a 18-bit CDAC and differential comparator, sampling at up to 250ksps with no pipeline delay. Its internal oscillator eliminates external clock dependency, and auto power-down reduces current to 0.9µA between conversions.

Digital gain compression (DGC) remaps the full-scale input range from ±VREF to 0.1×VREF to 0.9×VREF when REF/DGC is grounded - enabling rail-to-rail single-supply amplifier operation while preserving full 18-bit resolution and 38µV LSB (at VREF = 5V).

Key Specifications

Pinout & Package

Package: 16-lead (4mm × 3mm) plastic DFN with exposed thermal pad (Pin 17), rated for 0°C to 70°C operation. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7606C-18BSTZ, the LTC2376CDE-18#PBF uniquely balances ultra-low power (3.4mW), 102dB SNR, and digital gain compression in a compact DFN - making it optimal for space-constrained, battery-aware, or single-supply front-end designs where 18-bit integrity and deterministic latency are non-negotiable.

Availability

LTC2376CDE-18#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, portable high-speed data loggers, and industrial process control systems requiring stable component supply, long-term manufacturability, and guaranteed 0°C to 70°C performance.

Supply support for LTC2376CDE-18#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP technologies, serving precision instrumentation, industrial, automotive, and communications markets.

The LTC2376-18 family was designed for high-fidelity, low-power data acquisition in space- and energy-constrained systems - emphasizing noise floor, linearity, and ease of analog front-end integration via features like DGC and internal clocking.

FAQ

What is the operating temperature range for the LTC2376CDE-18#PBF?

The LTC2376CDE-18#PBF is specified for 0°C to 70°C ambient operation. This commercial-grade variant uses the same silicon die as industrial (–40°C to 85°C) and high-temp (–40°C to 125°C) versions, ensuring consistent electrical performance across grades. Thermal derating is not required within this range, and the DFN package's exposed pad must be soldered to PCB ground for optimal thermal resistance.

Does the LTC2376CDE-18#PBF require an external clock source?

No, the LTC2376CDE-18#PBF integrates an internal oscillator that sets conversion timing - eliminating need for external clock generation or distribution. The internal clock enables fixed 4µs conversion cycle time (250ksps) with no setup/hold dependencies. External SCK is only required for SPI data transfer; its frequency (up to 100MHz) does not affect conversion timing.

How does Digital Gain Compression (DGC) work in the LTC2376CDE-18#PBF?

When the REF/DGC pin is grounded, the LTC2376CDE-18#PBF enables DGC, digitally remapping the full-scale input range from ±VREF to 0.1×VREF to 0.9×VREF. For VREF = 5V, this yields a 0.5V to 4.5V differential input span - allowing single-supply amplifiers (e.g., LT6350 on +5.5V) to drive the ADC without negative rails while preserving full 18-bit resolution and 102dB SNR.

What package type and pin count does the LTC2376CDE-18#PBF use?

The LTC2376CDE-18#PBF uses a 16-lead plastic DFN package measuring 4mm × 3mm with an exposed thermal pad (Pin 17). It shares pinout compatibility with the MSOP variant but offers lower thermal resistance and smaller footprint - critical for compact, thermally sensitive PCB layouts. All 16 signal/power pins match the functional pin definitions in the datasheet.

Can the LTC2376CDE-18#PBF interface with 1.8V logic systems?

Yes, the LTC2376CDE-18#PBF supports 1.8V to 5V I/O logic levels via its independent OVDD supply pin (Pin 15). When OVDD = 1.8V, all digital pins (SCK, SDO, RDL/SDI, BUSY, CHAIN, CNV) operate at 1.8V-compatible voltage thresholds (VIH = 0.8×OVDD, VIL = 0.2×OVDD), enabling direct connection to low-voltage FPGAs or microcontrollers without level shifters.