Analog Devices Inc. LTC2323HUFD-12#PBF

Overview

LTC2323HUFD-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 guaranteed operation up to 125°C. It integrates dual low-drift internal references (2.048 V or 4.096 V), supports CMOS or LVDS serial interface, and targets high-speed data acquisition in harsh thermal environments.

For engineers reviewing the LTC2323HUFD-12#PBF datasheet, LTC2323HUFD-12#PBF pinout, LTC2323HUFD-12#PBF application, or LTC2323HUFD-12#PBF equivalent, key selection considerations include its dual-channel 5 Msps timing, wide common-mode input range (0 V to VDD), 1.8 V–2.5 V I/O voltage compatibility, and support for both internal reference and external reference configurations without hardware reconfiguration.

Technical Context

The LTC2323HUFD-12#PBF implements a dual SAR architecture with independent sample-and-hold circuits per channel, enabling simultaneous sampling and one-cycle latency conversion. Its differential input stage accepts 8 V_P-P full-scale swing with common-mode range spanning 0 V to VDD, and features integrated 20 ppm/°C max drift reference buffers for REFOUT1 and REFOUT2.

Digital interface flexibility includes selectable CMOS or LVDS mode via the CMOS/LVDS pin, with skew-matched CLKOUT+/- outputs for deterministic data capture. The device supports nap and sleep modes, achieving 5 μW total sleep current, and operates from single 3.3 V or 5 V analog supply with separate 1.71 V–2.63 V OVDD for I/O domain control.

Key Specifications

Pinout & Package

Package: 28-lead (4 mm × 5 mm) QFN with exposed pad (Pin 29), rated for operation from –40°C to +125°C (H-grade).

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 ADS8862IPW, the LTC2323HUFD-12#PBF uniquely delivers dual-channel 5 Msps throughput with integrated low-drift reference and guaranteed 125°C operation-enabling compact, thermally robust, and self-contained high-speed acquisition without external support components.

Availability

LTC2323HUFD-12#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking telemetry, and multiphase motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2323HUFD-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 since 1965.

The LTC2323HUFD-12#PBF belongs to Analog Devices' high-speed precision SAR ADC product line, engineered specifically for demanding applications requiring simultaneous dual-channel sampling, wide dynamic range, and operation in extreme thermal environments.

FAQ

What is the maximum operating temperature of the LTC2323HUFD-12#PBF?

The LTC2323HUFD-12#PBF is an H-grade device qualified for continuous operation from –40°C to +125°C ambient temperature. This rating is verified per Analog Devices' reliability testing protocols and applies across all specified electrical performance parameters, including INL, SNR, and reference stability. The LTC2323HUFD-12#PBF maintains guaranteed 12-bit no-missing-codes behavior and ±0.5 LSB INL typical throughout this full range.

Does the LTC2323HUFD-12#PBF require external reference components?

No-the LTC2323HUFD-12#PBF integrates two precision, low-drift (20 ppm/°C max) reference buffers delivering either 2.048 V or 4.096 V on REFOUT1 and REFOUT2. Each reference output requires only local 0.1 µF + 10 µF ceramic decoupling. External references are optional: grounding REFINT disables both internal buffers, allowing 1.25 V–VDD external sources to drive REFOUT1/REFOUT2 directly.

How does the LTC2323HUFD-12#PBF support pseudo-differential input configurations?

The LTC2323HUFD-12#PBF natively supports pseudo-differential unipolar (0 to REFOUT) and bipolar (±REFOUT/2) modes without hardware changes. Its differential input structure accepts arbitrary common-mode voltages (0 V to VDD), so connecting one AIN pin to a fixed voltage (e.g., ground or VREF/2) and the other to the signal automatically configures the correct transfer function-outputting valid 12-bit codes with inherent over/underrange handling.

Can the LTC2323HUFD-12#PBF operate with a 3.3 V supply and 1.8 V I/O voltage?

Yes-the LTC2323HUFD-12#PBF supports VDD = 3.3 V (3.13 V–3.47 V) and OVDD = 1.8 V (within 1.71 V–2.63 V range). At 3.3 V VDD and 5 Msps, it dissipates 55–58 mW total; I/O pins (SDO, CLKOUT, SCK) operate at OVDD logic levels, enabling seamless interfacing with 1.8 V FPGA banks. The CMOS/LVDS pin must be grounded for CMOS mode at 1.8 V.

What is the purpose of the REFRTN1 and REFRTN2 pins on the LTC2323HUFD-12#PBF?

REFRTN1 and REFRTN2 are dedicated return paths for the internal reference buffers driving REFOUT1 and REFOUT2. They must be bypassed directly to their respective REFOUT pins using 0.1 µF + 10 µF capacitors-never tied to system ground. This Kelvin-sense configuration ensures accurate reference voltage regulation by eliminating IR drop errors in PCB traces, preserving the 20 ppm/°C drift spec and ±3 LSB full-scale error guarantee.