Analog Devices Inc. LTC2323IUFD-12#TRPBF

Overview

LTC2323IUFD-12#TRPBF from Analog Devices is a dual-channel, 12-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps per channel throughput, ±0.5 LSB typical INL, 73 dB SNR at 2 MHz input, and operation up to 125°C. It features an integrated low-drift 4.096 V reference, CMOS or LVDS serial interface, and 28-lead 4 mm × 5 mm QFN package - ideal for high-speed data acquisition in optical networking and motor control systems.

For engineers reviewing the LTC2323IUFD-12#TRPBF datasheet, LTC2323IUFD-12#TRPBF pinout, LTC2323IUFD-12#TRPBF application, or LTC2323IUFD-12#TRPBF equivalent, key selection considerations include guaranteed 12-bit no-missing-codes performance, wide common-mode input range (0 V to VDD), dual-channel timing matching (500 ps aperture delay matching), and support for both internal reference (2.048 V/4.096 V) and external reference configurations.

Technical Context

The LTC2323IUFD-12#TRPBF implements a dual SAR architecture with independent sample-and-hold circuits per channel and one-cycle latency. Its differential input stage supports fully differential, pseudo-differential bipolar, and pseudo-differential unipolar modes without hardware reconfiguration, with 8 V_P-P full-scale range referenced to ±REFOUT.

It integrates two temperature-compensated reference buffers (20 ppm/°C max drift), configurable via REFINT pin, and offers flexible digital I/O: CMOS mode (1.8 V–2.5 V OVDD) or LVDS mode (2.5 V OVDD, 100 Ω termination), with skew-matched CLKOUT+/- for deterministic data capture.

Key Specifications

Pinout & Package

Package: 28-lead (4 mm × 5 mm) QFN with exposed pad; RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7322BRUZ, LTC2323IUFD-12#TRPBF delivers 5× higher throughput and integrated reference, simplifying layout and calibration; versus LTC2325IUF-14#TRPBF, it trades 2 bits of resolution for smaller 4 mm × 5 mm footprint and lower power, making it optimal for space-constrained 12-bit applications.

Availability

LTC2323IUFD-12#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking modules, and multiphase motor control designs requiring stable component supply, extended temperature operation, and long-term production continuity.

Supply support for LTC2323IUFD-12#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2323IUFD-12#TRPBF belongs to the LTC23xx family of high-speed SAR ADCs, designed specifically for applications demanding precision, speed, and robustness in thermally demanding or electrically noisy environments.

FAQ

What is the maximum operating temperature for the LTC2323IUFD-12#TRPBF?

The LTC2323IUFD-12#TRPBF is rated for operation from –40°C to +125°C (H-grade), with guaranteed performance including ±0.5 LSB INL and 73 dB SNR across this full range. This makes LTC2323IUFD-12#TRPBF suitable for under-hood automotive, downhole oil/gas, and industrial motor drive applications where ambient temperatures exceed 85°C.

Does the LTC2323IUFD-12#TRPBF support external reference inputs?

Yes, the LTC2323IUFD-12#TRPBF supports external references via REFOUT1 and REFOUT2 pins. When REFINT is tied to ground, the internal reference buffers are disabled, allowing external voltages from 1.25 V to VDD to drive these pins. The LTC2323IUFD-12#TRPBF maintains full specification compliance with external references, including dynamic performance and linearity.

How does the CMOS/LVDS pin (Pin 25) affect interface configuration?

The CMOS/LVDS pin on the LTC2323IUFD-12#TRPBF selects the digital interface standard: grounded for CMOS (single-ended SDO/CLKOUT), tied to OVDD for LVDS (differential SDO/CLKOUT), or left floating for low-power LVDS. This setting determines driver strength, termination requirements (100 Ω differential for LVDS), and compatible host logic families - all without changing firmware or PCB layout.

What is the significance of "12-bit + sign" resolution in the LTC2323IUFD-12#TRPBF?

"12-bit + sign" means the LTC2323IUFD-12#TRPBF outputs a 13-bit two's complement code where the MSB indicates polarity and the remaining 12 bits represent magnitude. This enables seamless digitization of bipolar signals (e.g., ±2.048 V) with true zero-crossing resolution - a key advantage over standard 12-bit unipolar ADCs that require level-shifting for AC-coupled inputs.

Can the LTC2323IUFD-12#TRPBF operate from a 3.3 V supply?

Yes, the LTC2323IUFD-12#TRPBF operates from either 3.3 V or 5 V VDD supply, with specified performance across both. At 3.3 V, typical power dissipation is 55–58 mW per channel at 5 Msps, and internal reference outputs 2.048 V (±0.3% over temperature). The OVDD supply remains independent (1.71–2.5 V) to support mixed-voltage host interfaces.