Analog Devices Inc. LTC2344CUH-16#TRPBF

Overview

LTC2344CUH-16#TRPBF from Analog Devices is a 16-bit, quad-channel simultaneous-sampling SAR ADC with differential wide common-mode inputs, ±1.25LSB INL, 93.4dB SNR, and per-channel SoftSpan configuration (±4.096V/0–4.096V/±2.048V/0–2.048V). It operates at 400ksps per channel with integrated 4.096V reference buffer and supports CMOS/LVDS serial I/O in a 32-lead 5mm × 5mm QFN package for industrial data acquisition systems.

For engineers reviewing the LTC2344CUH-16#TRPBF datasheet, LTC2344CUH-16#TRPBF pinout, LTC2344CUH-16#TRPBF application, or LTC2344CUH-16#TRPBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation, rail-to-rail input overdrive tolerance, 102dB CMRR at 200Hz, and programmable per-channel input range selection via SPI register writes.

Technical Context

The LTC2344CUH-16#TRPBF implements a true simultaneous sampling architecture across four independent SAR cores, each with dedicated sample-and-hold circuitry and configurable SoftSpan input ranges. Its analog front-end delivers 102dB CMRR and rail-to-rail input common-mode range (0V to VDD), enabling direct digitization of bipolar, unipolar, and arbitrary common-mode signals without external level-shifting.

Digital interface flexibility includes pin-selectable CMOS (1.8V–5V) or LVDS output modes, with 1–4 lane CMOS data width selection to balance throughput and bus loading. Internal conversion clock eliminates cycle latency, and the integrated reference buffer provides 4.096V output with 5ppm/°C max temperature coefficient when driven by the internal bandgap.

Key Specifications

Pinout & Package

32-lead plastic QFN (UH package), 5mm × 5mm body, 0.5mm pitch, exposed thermal pad (Pin 33 = GND) requiring PCB soldering for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606C-16 and ADS8684, the LTC2344CUH-16#TRPBF uniquely combines per-channel SoftSpan range selection, true simultaneous sampling with <150ps matching, and integrated 4.096V reference buffer-enabling compact, low-noise, mixed-signal DAQ systems without external gain-switching or reference conditioning.

Availability

LTC2344CUH-16#TRPBF is available at Aetrix Electronics and suitable for industrial process control, medical imaging equipment, high-speed data acquisition systems, and programmable logic controllers requiring stable component supply across extended temperature ranges (0°C to 70°C).

Supply support for LTC2344CUH-16#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 with precision data conversion and power management solutions.

The LTC2344-16 product line was designed specifically for high-accuracy, multi-channel industrial and medical data acquisition systems requiring simultaneous sampling, flexible input range configuration, and robust noise immunity in electrically noisy environments.

FAQ

What is the maximum sampling rate per channel for the LTC2344CUH-16#TRPBF?

The LTC2344CUH-16#TRPBF achieves 400ksps per channel when all four channels are enabled. Throughput increases to 500ksps, 666ksps, and 1000ksps when three, two, or one channel is enabled respectively-enabling dynamic channel allocation based on system bandwidth needs. This scalability is implemented via internal arbitration without external timing changes.

Does the LTC2344CUH-16#TRPBF require an external reference voltage?

No, the LTC2344CUH-16#TRPBF includes an internal 2.048V bandgap reference and a buffered 4.096V output (REFBUF pin) that can be used directly. An external reference may be applied to REFIN (1.25V–2.2V) or REFBUF (2.5V–5V) for higher accuracy, but it is not required for standard operation. The internal reference is specified over the full 0°C to 70°C range.

How does the SoftSpan feature work on the LTC2344CUH-16#TRPBF?

The SoftSpan feature on the LTC2344CUH-16#TRPBF allows each of the four channels to be independently configured via SPI register writes to accept ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V input ranges-without hardware changes. This is achieved through internal programmable gain and offset calibration, enabling mixed-signal acquisition (e.g., one channel for ±10V sensors, another for 4–20mA loop signals) on a single device.

What is the operating temperature range of the LTC2344CUH-16#TRPBF?

The LTC2344CUH-16#TRPBF is rated for 0°C to 70°C operation (C-grade). This is confirmed by the "CUH" suffix in the part number and the ordering information table, which explicitly lists "0°C to 70°C" for LTC2344CUH-16 variants. Performance specifications-including INL, SNR, and CMRR-are guaranteed across this full range.

Can the LTC2344CUH-16#TRPBF interface directly with an FPGA using LVDS?

Yes, the LTC2344CUH-16#TRPBF supports pin-selectable LVDS serial output with differential SDO/SCKO pairs, 275–425mV differential swing, and 1.1–1.3V common-mode voltage-fully compliant with standard LVDS FPGA I/O banks. Timing parameters (e.g., tDSDOSCKI = 6ns, tSKEW = ±0.4ns) are characterized for reliable 100MHz+ data capture without external termination beyond 100Ω differential loads.