Analog Devices Inc. LTC2325IUKG-14#TRPBF

Overview

LTC2325IUKG-14#TRPBF from Analog Devices (formerly Linear Technology) is a quad, 14-bit + sign successive approximation register (SAR) analog-to-digital converter with simultaneous sampling, differential inputs, and integrated temperature-compensated reference. It delivers 5 Msps per channel, ±1 LSB INL typical, 81 dB SNR at 2.2 MHz, and operates from single 3.3 V or 5 V supply - ideal for high-speed data acquisition in multiphase motor control and optical networking systems.

For engineers reviewing the LTC2325IUKG-14#TRPBF datasheet, LTC2325IUKG-14#TRPBF pinout, LTC2325IUKG-14#TRPBF application, or LTC2325IUKG-14#TRPBF equivalent, key selection considerations include guaranteed 14-bit no-missing-codes performance, 52-lead QFN package with LVDS/CMOS dual-mode serial interface, internal 4.096 V reference with 20 ppm/°C max drift, and –40°C to 85°C industrial temperature rating.

Technical Context

The LTC2325IUKG-14#TRPBF implements four independent SAR ADC cores sharing a common reference architecture, enabling true simultaneous sampling across all four channels with aperture delay matching ≤500 ps. Its differential input stage supports 8 V_P-P full-scale range and >102 dB common-mode rejection at 2.2 MHz.

It features dual-mode digital I/O: CMOS-compatible (1.8 V–2.5 V OVDD) or LVDS (2.5 V OVDD), configurable via CMOS/LVDS and SDR/DDR pins. Conversion is initiated by a low-jitter CNV pulse, with one-cycle latency and 170 ns conversion time, synchronized to CLKOUT for FPGA interfacing.

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 quad SAR ADC applications.

Compared with AD7606C-16 and ADS8684, the LTC2325IUKG-14#TRPBF uniquely combines 5 Msps simultaneous sampling, LVDS/CMOS flexibility, and integrated 4.096 V reference - making it optimal for high-speed, multi-channel, FPGA-based systems where timing coherence and interface efficiency are critical.

Availability

LTC2325IUKG-14#TRPBF is available at Aetrix Electronics and suitable for multiphase motor control, optical network monitoring, and high-speed data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2325IUKG-14#TRPBF 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-14#TRPBF belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous multi-channel sampling, low noise, and robust digital interfacing in harsh industrial environments.

FAQ

What is the operating temperature range for the LTC2325IUKG-14#TRPBF?

The LTC2325IUKG-14#TRPBF is rated for industrial operation from –40°C to +85°C. This is confirmed by the "I" grade designation in the part number and specified in the Absolute Maximum Ratings table. All key specifications-including INL, SNR, and reference accuracy-are guaranteed across this full range, making the LTC2325IUKG-14#TRPBF suitable for deployment in motor drives, outdoor base stations, and factory automation equipment.

Does the LTC2325IUKG-14#TRPBF require an external reference?

No, the LTC2325IUKG-14#TRPBF includes an internal 4.096 V temperature-compensated reference with 20 ppm/°C max drift, fully usable out-of-the-box. The REFBUFEN pin controls buffer enable/disable: tie to VDD for internal reference use; ground it to disable all REFOUT1–4 buffers and connect external references (1.25 V–5 V) to those pins. The LTC2325IUKG-14#TRPBF thus supports both self-contained and externally referenced configurations without hardware change.

How does the simultaneous sampling work across four channels in the LTC2325IUKG-14#TRPBF?

The LTC2325IUKG-14#TRPBF uses a single CNV input to trigger acquisition on all four SAR ADC cores simultaneously. Aperture delay matching is guaranteed ≤500 ps, ensuring phase-coherent sampling critical for vector measurements. Each channel has its own dedicated sample-and-hold and conversion circuitry, eliminating inter-channel crosstalk and skew-unlike multiplexed architectures. This architecture is explicitly verified in the device's functional block diagram and timing characterization.

Can the LTC2325IUKG-14#TRPBF interface directly with a Xilinx Artix-7 FPGA?

Yes, the LTC2325IUKG-14#TRPBF supports direct LVDS or CMOS interfacing with Xilinx Artix-7 FPGAs. In LVDS DDR mode, it delivers 15-bit data using only 8 SCK edges per conversion, reducing clock frequency demands. CLKOUT provides a skew-matched latch clock, and the 100 Ω differential termination requirement aligns with Artix-7's LVDS I/O standards. The LTC2325IUKG-14#TRPBF's 1.71 V–2.63 V OVDD range also matches Artix-7's bank voltage flexibility.

What power-saving modes does the LTC2325IUKG-14#TRPBF support, and how quickly can it resume conversion?

The LTC2325IUKG-14#TRPBF offers Nap Mode (6.4 mA total supply current) and Sleep Mode (20–90 μA total). In Sleep Mode, the internal reference requires 50 ms to stabilize after wake-up before valid conversions resume. Nap Mode maintains reference readiness for immediate conversion upon CNV assertion. Both modes are controlled via standard digital interface commands and are fully characterized across temperature-enabling aggressive power management in battery-backed or thermally constrained systems using the LTC2325IUKG-14#TRPBF.