Analog Devices Inc. LTC2333CLX-16#PBF

Overview

LTC2333CLX-16#PBF from Analog Devices is a buffered 8-channel, 16-bit, 800ksps differential successive approximation register (SAR) ADC with ±10.24V input range, 30V_P-P common mode capability, and integrated 4.096V reference buffer. It supports pin-selectable CMOS (1.8V–5V) or LVDS serial interfaces and operates from dual analog supplies (±15V typical) and 5V digital supply - enabling direct digitization of industrial sensor signals in PLCs and process control systems.

For engineers reviewing the LTC2333CLX-16#PBF datasheet, LTC2333CLX-16#PBF pinout, LTC2333CLX-16#PBF application, or LTC2333CLX-16#PBF equivalent, key selection criteria include its picoamp-input leakage (500pA max at 85°C), ±1LSB INL over ±10.24V range, 94.2dB SNR, 128dB CMRR, and programmable SoftSpan™ input ranges per channel - critical for high-accuracy, multi-range industrial data acquisition.

Technical Context

The LTC2333CLX-16#PBF implements a SAR architecture with fully differential, buffered analog inputs capable of accepting true bipolar (IN– = 0V), fully differential (IN– = –IN+), or unipolar drive configurations across eight channels. Its SoftSpan™ feature enables per-conversion selection among eight input ranges including ±10.24V, 0V–10.24V, ±5.12V, and 0V–5.12V - all supported by internal reference and buffer without external components.

It features a programmable sequencer with no-latency control, rail-to-rail input overdrive tolerance, and 420ns step response (0.005% settling). The device supports two independent serial interface modes: CMOS (1.8V–5V OVDD) and LVDS (2.375V–5.25V OVDD), each with distinct timing specifications and termination requirements - allowing flexible integration into noise-sensitive or high-speed digital systems.

Key Specifications

Pinout & Package

Package: 48-lead plastic LQFP (7mm × 7mm), RoHS-compliant, lead-free (PBF), operating temperature range 0°C to 70°C (C-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606C-16 and ADS8688, the LTC2333CLX-16#PBF uniquely combines per-channel SoftSpan range selection, 30V_P-P common mode, LVDS/CMOS interface choice, and picoamp input leakage - making it optimal for high-density, mixed-signal industrial DAQ where signal integrity, layout simplicity, and supply flexibility are critical.

Availability

LTC2333CLX-16#PBF is available at Aetrix Electronics and suitable for industrial process control, programmable logic controllers, and test and measurement equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC2333CLX-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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2333-16 product line was designed specifically for high-accuracy, multi-channel industrial data acquisition - emphasizing low input leakage, wide common-mode range, flexible input configuration, and robust serial interfacing in harsh environments.

FAQ

What is the operating temperature range for the LTC2333CLX-16#PBF?

The LTC2333CLX-16#PBF is rated for 0°C to 70°C ambient operation (C-grade). This distinguishes it from the I-grade (–40°C to 85°C) and H-grade (–40°C to 125°C) variants. Its LQFP package and internal thermal design ensure stability across this range without derating, making it suitable for commercial and light-industrial environments where extended temperature operation is not required.

Does the LTC2333CLX-16#PBF require external reference components?

No - the LTC2333CLX-16#PBF integrates both a 2.048V internal reference (VREFIN) and a buffered 4.096V output (REFBUF), eliminating the need for external reference ICs or op-amps in most applications. When REFIN is left open or driven to 0V, the internal buffer is enabled; applying 1.25–2.2V to REFIN disables the buffer and allows external reference use - giving designers flexibility without added BOM cost.

How does the SoftSpan™ feature work on the LTC2333CLX-16#PBF?

The SoftSpan™ feature on the LTC2333CLX-16#PBF allows per-conversion selection of eight input ranges (e.g., ±10.24V, 0–10.24V, ±5.12V) via SPI register writes or hardware pins. Each channel can be independently configured, enabling mixed-range acquisition - such as measuring a ±10V sensor and a 0–5V thermistor simultaneously - without external multiplexers or gain switches, preserving signal integrity and simplifying firmware.

Can the LTC2333CLX-16#PBF interface directly with an FPGA using LVDS?

Yes - the LTC2333CLX-16#PBF supports native LVDS serial I/O with differential SDO, SCKO, SCKI, and SDI pins, compliant with ANSI/TIA/EIA-644-A. It requires 100Ω differential termination and operates with VICM = 1.2V and VID = 200–600mV. Timing parameters (e.g., tSCKI = 4ns min, tDSDOSCKI = 6ns) are specified for reliable FPGA interfacing at up to 250MHz clock rates in LVDS mode.

What is the maximum analog input common-mode voltage range for the LTC2333CLX-16#PBF?

The LTC2333CLX-16#PBF supports a 30V_P-P common-mode range, defined as VCM = VEE + 4V to VCC – 4V under recommended operating conditions. With typical ±15V analog supplies (VCC = +15V, VEE = –15V), this yields –11V to +11V common-mode capability - sufficient for direct connection to industrial sensors, isolation amplifiers, and motor drive feedback circuits without level-shifting circuitry.