Analog Devices Inc. LTC2325IUKG-16#PBF

Overview

LTC2325IUKG-16#PBF from Analog Devices (formerly Linear Technology) is a quad, 16-bit, 5 Msps/channel simultaneous-sampling SAR ADC with true differential inputs, internal 4.096 V reference, and CMOS/LVDS serial interface. It delivers ±2 LSB INL (typ), 82 dB SNR at 2.2 MHz input, and operates from –40°C to +85°C in a 52-pin QFN package. It targets high-speed data acquisition systems requiring precise phase-matched sampling across four channels.

For engineers reviewing the LTC2325IUKG-16#PBF datasheet, LTC2325IUKG-16#PBF pinout, LTC2325IUKG-16#PBF application, or LTC2325IUKG-16#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, simultaneous sampling latency of one cycle, 8 V_P-P differential input range with wide common-mode support, and configurable I/O mode (CMOS/LVDS/low-power LVDS) for FPGA or ASIC interfacing.

Technical Context

The LTC2325IUKG-16#PBF implements four independent 16-bit SAR ADC cores with matched sample-and-hold circuits, enabling true simultaneous acquisition across all channels. Its architecture includes an onboard low-drift (≤20 ppm/°C) 4.096 V reference buffer per channel and supports both internal and external reference configurations via REFBUFEN control.

It features dual-mode serial interface: CMOS-compatible (1.8 V–2.5 V OVDD) or LVDS (2.5 V OVDD), with SDR/DDR clocking options and skew-matched CLKOUT for reliable high-speed data capture. Power management includes nap (6.4 mA) and sleep (90 µW) modes to reduce system-level power during idle periods.

Key Specifications

Pinout & Package

Package: 52-lead (7 mm × 8 mm) plastic QFN with exposed thermal pad (Pin 53 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606C-16 and ADS8684, the LTC2325IUKG-16#PBF uniquely combines 5 Msps/channel speed, true simultaneous sampling, LVDS interface, and per-channel reference buffers-making it optimal for high-bandwidth, phase-coherent applications where timing fidelity and noise immunity are non-negotiable.

Availability

LTC2325IUKG-16#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking equipment, and multiphase motor control applications requiring stable component supply and guaranteed industrial temperature operation (–40°C to +85°C).

Supply support for LTC2325IUKG-16#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 LTC2325IUKG-16#PBF belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous multi-channel sampling, low latency, and exceptional AC performance in compact, thermally efficient packages.

FAQ

What is the operating temperature range of the LTC2325IUKG-16#PBF?

The LTC2325IUKG-16#PBF is rated for operation from –40°C to +85°C, meeting industrial-grade reliability requirements. This specification is explicitly defined in the Absolute Maximum Ratings table and confirmed across all electrical characteristics (denoted by "l" symbol), ensuring guaranteed performance across the full range without derating.

Does the LTC2325IUKG-16#PBF require an external reference, or does it include an internal one?

The LTC2325IUKG-16#PBF integrates a low-drift (≤20 ppm/°C) 4.096 V temperature-compensated reference buffer per channel (REFOUT1–REFOUT4). When REFBUFEN is tied to VDD, these internal references are active and usable. External references (1.25 V–5 V) may be applied by grounding REFBUFEN and driving REFOUTx pins directly.

Can the LTC2325IUKG-16#PBF interface directly with an FPGA using LVDS signaling?

Yes-the LTC2325IUKG-16#PBF supports LVDS I/O mode when CMOS/LVDS (Pin 25) is tied to OVDD. It provides fully differential SDOA±–SDOD± and CLKOUT± outputs, each requiring 100 Ω termination at the FPGA receiver. The LVDS interface operates at 2.5 V OVDD and supports both SDR and DDR clocking for flexible data rate optimization.

How many analog input channels does the LTC2325IUKG-16#PBF support, and are they sampled simultaneously?

The LTC2325IUKG-16#PBF supports exactly four fully differential analog input channels (AIN1± through AIN4±). All four channels are sampled simultaneously using independent, matched sample-and-hold circuits-ensuring zero inter-channel phase skew and enabling coherent multi-signal analysis critical for motor control and communications.

What power-saving modes does the LTC2325IUKG-16#PBF offer, and what are their typical current draws?

The LTC2325IUKG-16#PBF offers two low-power states: Nap mode (6.4 mA total supply current) entered after conversion completion, and Sleep mode (90 µW total power dissipation) for extended idle periods. Both modes retain register settings and allow fast wake-up (<50 ms for reference stabilization), making them suitable for burst-mode acquisition systems.