Analog Devices Inc. LTC2323IUFD-14#TRPBF

Overview

LTC2323IUFD-14#TRPBF from Analog Devices is a dual, 14-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps per channel throughput, ±1 LSB typical INL, 80 dB SNR at 2.2 MHz, and integrated 2.048 V / 4.096 V temperature-compensated reference. It operates from single 3.3 V or 5 V supply and supports CMOS or LVDS serial interface for high-speed data acquisition in motor control and optical networking.

For engineers reviewing the LTC2323IUFD-14#TRPBF datasheet, LTC2323IUFD-14#TRPBF pinout, LTC2323IUFD-14#TRPBF application, or LTC2323IUFD-14#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, 125°C-rated operation (I-grade), 28-lead 4 mm × 5 mm QFN package, and dual-channel simultaneous sampling with one-cycle latency.

Technical Context

The LTC2323IUFD-14#TRPBF implements two independent SAR ADC cores sharing a common clock domain, each with dedicated sample-and-hold and 15-bit CDAC. Its differential input architecture supports fully differential, pseudo-differential bipolar, and pseudo-differential unipolar modes without configuration, with input common mode range spanning 0 V to VDD and differential span of ±REFOUT (±4.096 V or ±2.048 V).

It features a high-speed SPI-compatible serial interface supporting both CMOS (1.8 V–2.5 V I/O) and LVDS modes, with skew-matched CLKOUT output for timing-critical FPGA/DSP interfacing. Internal reference buffers are selectable via REFINT pin, and power management includes nap (2.85–5 mA) and sleep (1–5 µA) modes for dynamic power scaling.

Key Specifications

Pinout & Package

Package: 28-lead (4 mm × 5 mm) plastic QFN (UFD) with exposed pad (Pin 29) soldered to PCB ground plane. Thermal resistance θ_JA = 43°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel SAR ADC applications.

Compared with AD7960BCPZ-RL7 and ADS8864IPWR, the LTC2323IUFD-14#TRPBF uniquely combines dual-channel simultaneity, integrated reference, LVDS/CMOS flexibility, and industrial temperature rating-enabling compact, robust, and deterministic high-speed acquisition without external support components.

Availability

LTC2323IUFD-14#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical network monitoring equipment, and industrial motor control applications requiring stable component supply and long-term lifecycle support.

Supply support for LTC2323IUFD-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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2323IUFD-14#TRPBF belongs to the Linear Technology high-speed precision SAR ADC product line, designed specifically for demanding applications requiring simultaneous dual-channel sampling, low-latency deterministic timing, and robust operation in electrically noisy or thermally challenging environments.

FAQ

What is the maximum sampling rate supported by the LTC2323IUFD-14#TRPBF?

The LTC2323IUFD-14#TRPBF supports a maximum sampling rate of 5 Msps per channel. This is specified across the full operating temperature range (–40°C to +85°C) and applies to both channels simultaneously. The device achieves one-cycle latency, meaning the conversion result is available on the first SCK edge after the CNV falling edge, enabling tight real-time control loop timing in FPGA- or DSP-based systems using the LTC2323IUFD-14#TRPBF.

Does the LTC2323IUFD-14#TRPBF require an external reference voltage?

No, the LTC2323IUFD-14#TRPBF includes an onboard low-drift (20 ppm/°C max) temperature-compensated reference that outputs either 2.048 V or 4.096 V. The reference buffers (REFOUT1 and REFOUT2) are enabled by default when REFINT is tied to VDD. To use an external reference, tie REFINT to ground-this disables both internal buffers, allowing external voltages from 1.25 V to VDD to drive REFOUT1/2 pins. The LTC2323IUFD-14#TRPBF thus eliminates external reference components in most designs.

What are the I/O voltage requirements for the LTC2323IUFD-14#TRPBF digital interface?

The LTC2323IUFD-14#TRPBF requires OVDD between 1.71 V and 2.63 V for its digital I/O interface. In CMOS mode (CMOS/LVDS pin grounded), logic levels are referenced to OVDD, supporting 1.8 V or 2.5 V host interfaces. In LVDS mode (CMOS/LVDS pin tied to OVDD), the device drives differential outputs compliant with ANSI TIA/EIA-644-A, requiring 100 Ω termination. The LTC2323IUFD-14#TRPBF does not support 3.3 V or 5 V digital I/O-OVDD must remain within the specified 1.71–2.63 V range.

How does the LTC2323IUFD-14#TRPBF handle pseudo-differential input configurations?

The LTC2323IUFD-14#TRPBF natively supports pseudo-differential bipolar (e.g., AIN1+ = VREF/2, AIN1– = signal) and pseudo-differential unipolar (e.g., AIN1– = GND, AIN1+ = signal) modes without any hardware configuration or register programming. Its flexible input structure accepts arbitrary common-mode relationships between AIN+ and AIN–, provided both remain within 0 V to VDD. The LTC2323IUFD-14#TRPBF automatically adapts its transfer function-spanning 2¹⁴ codes for pseudo-differential and 2¹⁵ for fully differential-preserving digitization of over/underrange conditions critical for control-loop robustness.

What thermal and packaging specifications apply to the LTC2323IUFD-14#TRPBF?

The LTC2323IUFD-14#TRPBF uses a 28-lead plastic QFN package (4 mm × 5 mm, UFD) with exposed thermal pad (Pin 29) that must be soldered to the PCB ground plane. Its thermal resistance is θ_JA = 43°C/W. The device is rated for operation from –40°C to +85°C (I-grade), with guaranteed performance including ±1 LSB INL and 80 dB SNR across this full range. The exposed pad improves thermal dissipation and electrical grounding-critical for maintaining SNR and minimizing ground bounce in high-speed ADC layouts using the LTC2323IUFD-14#TRPBF.