Analog Devices Inc. LTC2325HUKG-16#PBF

Overview

LTC2325HUKG-16#PBF from Analog Devices (formerly Linear Technology) is a quad, 16-bit, 5 Msps/channel simultaneous-sampling SAR ADC with true differential inputs, integrated 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 across –40°C to +125°C. Ideal for high-channel-count, high-dynamic-range data acquisition in motor control and optical networking.

For engineers reviewing the LTC2325HUKG-16#PBF datasheet, LTC2325HUKG-16#PBF pinout, LTC2325HUKG-16#PBF application, or LTC2325HUKG-16#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation, simultaneous sampling across four channels, internal reference accuracy and drift (20 ppm/°C max), LVDS/CMOS I/O flexibility, and extended temperature qualification up to +125°C.

Technical Context

The LTC2325HUKG-16#PBF implements four independent 16-bit SAR ADC cores with synchronized sample-and-hold circuits, enabling true simultaneous sampling across all four channels. Its architecture supports both internal (4.096 V or 2.048 V) and external reference configurations via REFBUFEN control.

Digital interface flexibility includes selectable CMOS or LVDS I/O modes (via CMOS/LVDS pin), SDR/DDR clocking (via SDR/DDR pin), and skew-matched CLKOUT output for FPGA timing alignment. Power management includes nap mode (6.4 mA) and sleep mode (90 µA) for dynamic power scaling.

Key Specifications

Pinout & Package

Package: 52-lead (7 mm × 8 mm) plastic QFN (UKG) with exposed thermal pad (Pin 53 = GND). RoHS-compliant, lead-free finish (#PBF).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 16-bit simultaneous-sampling ADC applications.

Compared with AD7606C-16 and ADS8684, the LTC2325HUKG-16#PBF uniquely combines 5 Msps/ch speed, true simultaneous sampling, LVDS capability, and extended temperature rating - making it optimal for high-fidelity, thermally demanding, real-time control systems where timing integrity and noise immunity are non-negotiable.

Availability

LTC2325HUKG-16#PBF is available at Aetrix Electronics and suitable for multiphase motor control, optical network monitoring, and high-speed data acquisition systems requiring stable component supply, extended temperature operation, and guaranteed simultaneous sampling performance.

Supply support for LTC2325HUKG-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 LTC2325HUKG-16#PBF belongs to ADI's high-speed precision SAR ADC product line, engineered for applications demanding simultaneous multi-channel acquisition, low noise, and robust operation across extreme temperatures.

FAQ

What is the maximum operating temperature of the LTC2325HUKG-16#PBF?

The LTC2325HUKG-16#PBF is rated for continuous operation from –40°C to +125°C, meeting the H-grade specification. This extended temperature range is validated per the Absolute Maximum Ratings table and applies across all electrical specifications including INL, SNR, and reference stability - making it suitable for under-hood automotive and industrial motor drive applications where ambient temperatures exceed 105°C.

Does the LTC2325HUKG-16#PBF require an external reference?

No, the LTC2325HUKG-16#PBF integrates a precision 4.096 V temperature-compensated reference with ≤20 ppm/°C drift and 0.5% initial accuracy. REFBUFEN (Pin 43) can be tied to VDD to enable internal buffers on REFOUT1–4. External references may be used by grounding REFBUFEN and driving REFOUTx pins between 1.25 V and 5 V - but this is optional, not required.

How does the LTC2325HUKG-16#PBF achieve simultaneous sampling across four channels?

The LTC2325HUKG-16#PBF uses four independent sample-and-hold (S/H) circuits, each directly preceding its own 16-bit SAR core. A single CNV pulse triggers acquisition start across all S/Hs simultaneously; conversion begins on the CNV falling edge. This architecture guarantees sub-500 ps aperture delay matching between channels - verified in Electrical Characteristics tables - ensuring true phase-coherent acquisition.

Can the LTC2325HUKG-16#PBF interface directly with an FPGA using LVDS?

Yes. When CMOS/LVDS (Pin 25) is tied to OVDD, the LTC2325HUKG-16#PBF configures all serial outputs (SDOA±–SDOD±) and CLKOUT± as LVDS drivers. Each differential pair requires 100 Ω termination at the FPGA receiver. LVDS mode supports both SDR and DDR clocking and delivers 220–350 mV differential swing with 0.85–1.2 V common-mode voltage - fully compliant with standard LVDS receivers.

What power savings does the LTC2325HUKG-16#PBF offer in low-activity periods?

In sleep mode (ISLEEP = 90 µA total), the LTC2325HUKG-16#PBF reduces power to 90 µW - less than 0.1% of full-rate consumption. Nap mode draws 5.3–6.4 mA (18–21 mW), retaining reference and logic state while disabling ADC conversions. Both modes retain register settings and allow fast wake-up (<50 ms for REFOUT stabilization), enabling dynamic duty cycling in battery-powered or thermally constrained systems.