Analog Devices Inc. LTC2323CUFD-12#PBF

Overview

LTC2323CUFD-12#PBF 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 supports 8 V_P-P differential input range with wide common-mode range (0 V to V_DD) and integrates low-drift 2.048 V / 4.096 V internal references - ideal for high-speed motor control feedback and optical network monitoring.

For engineers reviewing the LTC2323CUFD-12#PBF datasheet, LTC2323CUFD-12#PBF pinout, LTC2323CUFD-12#PBF application, or LTC2323CUFD-12#PBF equivalent, key selection considerations include guaranteed 12-bit no-missing-codes performance, CMOS/LVDS SPI-compatible serial interface, dual independent reference buffers (REFOUT1/REFOUT2), 28-pin 4 mm × 5 mm QFN package, and support for both 3.3 V and 5 V analog supply operation.

Technical Context

The LTC2323CUFD-12#PBF implements a dual SAR architecture with independent sample-and-hold circuits per channel, enabling true simultaneous sampling and one-cycle latency conversion. Its differential input stage accepts fully differential, pseudo-differential unipolar, or pseudo-differential bipolar signals without hardware reconfiguration, with common-mode rejection of 85 dB at 2.2 MHz.

It features two independently configurable internal reference buffers (REFOUT1/REFOUT2), each selectable between 2.048 V and 4.096 V, with 20 ppm/°C max drift and 0.25 Ω output impedance. The digital interface supports CMOS or LVDS mode via the CMOS/LVDS pin, with skew-matched CLKOUT+/- outputs for deterministic timing in FPGA-based systems.

Key Specifications

Pinout & Package

Package: 28-lead (4 mm × 5 mm) QFN with exposed pad (Pin 29), RoHS-compliant and lead-free (PbF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7322BRUZ and ADS8862IDRCT, the LTC2323CUFD-12#PBF uniquely combines dual 5 Msps channels, integrated dual references, LVDS/CMOS interface, and 125°C operation - making it the only option that satisfies simultaneous high-speed, high-temperature, and low-BOM-count requirements in motor control and optical networking.

Availability

LTC2323CUFD-12#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 across extended temperature ranges and long production lifecycles.

Supply support for LTC2323CUFD-12#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2323CUFD-12#PBF belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous dual-channel sampling, wide input common-mode range, and robust operation in harsh thermal environments.

FAQ

What is the maximum sampling frequency supported by the LTC2323CUFD-12#PBF?

The LTC2323CUFD-12#PBF supports a maximum sampling frequency of 5 Msps per channel, with guaranteed timing performance across the full operating temperature range. This is achieved using a high-speed SAR architecture with one-cycle latency and a minimum conversion time of 161.9 ns, as specified in Table 7 of the datasheet.

Does the LTC2323CUFD-12#PBF require an external reference voltage?

No, the LTC2323CUFD-12#PBF includes two independent, low-drift internal reference buffers (REFOUT1 and REFOUT2) that can be configured for either 2.048 V or 4.096 V output. The internal reference is enabled by tying REFINT to VDD; grounding REFINT disables the buffers to allow external reference use (1.25 V to V_DD).

How does the LTC2323CUFD-12#PBF handle pseudo-differential input configurations?

The LTC2323CUFD-12#PBF natively supports pseudo-differential unipolar and bipolar inputs without hardware or register configuration. In pseudo-differential unipolar mode, one input is grounded and the other swings 0–V_REF; in pseudo-differential bipolar mode, one input is fixed at mid-supply and the other swings ±V_REF/2 - both yield valid 12-bit codes with no missing codes.

What package type and pin count does the LTC2323CUFD-12#PBF use?

The LTC2323CUFD-12#PBF is housed in a 28-lead QFN package measuring 4 mm × 5 mm with an exposed thermal pad (Pin 29). This RoHS-compliant, lead-free (PbF) package provides low thermal resistance and compact footprint for space-constrained PCB layouts in industrial and communications equipment.

Can the LTC2323CUFD-12#PBF operate with both 3.3 V and 5 V analog supplies?

Yes, the LTC2323CUFD-12#PBF is fully specified for operation with either a 3.3 V (3.13–3.47 V) or 5 V (4.75–5.25 V) analog supply (V_DD). Power dissipation scales accordingly: 55–58 mW at 3.3 V / 5 Msps versus 76–100 mW at 5 V / 5 Msps, allowing system-level trade-offs between noise performance and power budget.