Analog Devices Inc. LTC2379IDE-18#PBF

Overview

LTC2379IDE-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1.6 Msps successive approximation register (SAR) analog-to-digital converter with ±2 LSB INL max, 101.2 dB SNR at 2 kHz, and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5 V analog supply and supports ±V_REF differential input with V_REF adjustable from 2.5 V to 5.1 V, targeting high-precision data acquisition in industrial and medical instrumentation.

For engineers reviewing the LTC2379IDE-18#PBF datasheet, LTC2379IDE-18#PBF pinout, LTC2379IDE-18#PBF application, or LTC2379IDE-18#PBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, daisy-chain SPI interface compatibility, internal conversion clock, −40°C to +85°C operating range, and DGC-enabled 0.5 V to 4.5 V input swing with 5 V reference.

Technical Context

The LTC2379IDE-18#PBF implements a fully differential SAR architecture with charge redistribution capacitor DAC and internal oscillator, eliminating external timing dependencies. Its conversion process has zero pipeline delay and no cycle latency, enabling deterministic real-time sampling at up to 1.6 Msps.

Digital gain compression (DGC) is implemented via dedicated REF/DGC pin control, mapping full-scale input from ±V_REF to 0.1×V_REF–0.9×V_REF differentially-preserving 18-bit resolution while allowing single-rail amplifier biasing. The device supports 1.8 V to 5 V I/O logic levels via separate OVDD supply and features daisy-chain mode via CHAIN and RDL/SDI pins.

Key Specifications

Pinout & Package

Package: 16-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 17 = GND). RoHS-compliant, lead-free finish. Thermal resistance θ_JA = 40°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7986BCPZ-RL7 and ADS8860IRGET, the LTC2379IDE-18#PBF uniquely combines 1.6 Msps throughput, 101.2 dB SNR, DGC, and internal clock in a single 4 mm × 3 mm DFN-enabling higher channel density, simpler analog front-end design, and reduced system-level timing overhead.

Availability

LTC2379IDE-18#PBF is available at Aetrix Electronics and suitable for medical imaging data acquisition, industrial process control monitoring, and portable test equipment requiring stable component supply, extended temperature operation, and long-term production continuity.

Supply support for LTC2379IDE-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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.

The LTC2379IDE-18#PBF belongs to ADI's precision SAR ADC product line, designed specifically for applications demanding ultra-low noise, high linearity, and low-power operation in harsh thermal environments-such as medical diagnostics, industrial automation, and portable instrumentation.

FAQ

What is the maximum sampling rate supported by the LTC2379IDE-18#PBF?

The LTC2379IDE-18#PBF supports a maximum sampling rate of 1.6 Msps across its full operating temperature range (−40°C to +85°C). This is achieved with a fixed conversion time of 360–412 ns and no pipeline latency, enabling deterministic real-time acquisition for time-critical applications like transient capture and closed-loop control.

How does digital gain compression (DGC) work in the LTC2379IDE-18#PBF?

Digital gain compression in the LTC2379IDE-18#PBF is enabled by grounding the REF/DGC pin. This remaps the full-scale input range from ±V_REF to 0.1×V_REF–0.9×V_REF differentially-e.g., 0.5 V to 4.5 V with a 5 V reference-preserving all 18 bits of resolution while allowing the driving amplifier to operate from a single positive supply, such as +5.5 V.

What package type and thermal characteristics does the LTC2379IDE-18#PBF use?

The LTC2379IDE-18#PBF uses a 16-lead (4 mm × 3 mm) plastic DFN package with exposed thermal pad (Pin 17 = GND). Its junction-to-ambient thermal resistance is θ_JA = 40°C/W. The exposed pad must be soldered directly to the PCB ground plane to ensure proper thermal dissipation and electrical performance.

Does the LTC2379IDE-18#PBF require an external clock source?

No, the LTC2379IDE-18#PBF includes an internal oscillator that sets the conversion timing, eliminating the need for an external clock source. This simplifies system design, reduces jitter sensitivity, and improves layout robustness-especially in noise-prone industrial environments where external clock routing can degrade SNR.

What is the guaranteed integral nonlinearity (INL) specification for the LTC2379IDE-18#PBF?

The LTC2379IDE-18#PBF guarantees ±2 LSB maximum integral nonlinearity (INL) over its full operating temperature range of −40°C to +85°C. This ensures monotonic behavior and accurate end-point linearity for applications requiring calibrated measurements, such as precision instrumentation and metrology-grade data acquisition.