Analog Devices Inc. DC2520A-B

Overview

LTC2344-16 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 400ksps per channel throughput. It features per-channel SoftSpan™ configurable input ranges (±4.096V, 0–4.096V, ±2.048V, 0–2.048V), integrated 4.096V reference and buffer, and operates up to 125°C - ideal for high-precision industrial process control and medical imaging signal chains.

For engineers reviewing the LTC2344-16 datasheet, LTC2344-16 pinout, LTC2344-16 application, or LTC2344-16 equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation, rail-to-rail input overdrive tolerance, CMOS/LVDS serial interface flexibility, 102dB CMRR at 200Hz, and 32-lead 5mm × 5mm QFN package compatibility with high-density PCB layouts.

Technical Context

The LTC2344-16 employs a successive approximation register architecture with internal conversion clock and zero-cycle latency. Its analog front-end supports independent per-channel SoftSpan configuration via SPI register writes, enabling real-time range switching without hardware reconfiguration.

It integrates a precision bandgap reference (2.048V) and buffered output (4.096V), with optional external overdrive capability on both REFIN (1.25–2.2V) and REFBUF (2.5–5V). Input common mode range spans 0V to VDD, and CMRR remains ≥102dB at low frequencies, supporting direct digitization of sensor outputs and isolated amplifier signals.

Key Specifications

Pinout & Package

Package: 32-lead (5mm × 5mm) plastic QFN (UH package); exposed pad (Pin 33) must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel, 16-bit SAR ADC applications.

Compared with AD7606C-16 and ADS8684, the LTC2344-16 uniquely combines per-channel SoftSpan configurability, 400ksps simultaneous sampling, 93.4dB SNR, and integrated 4.096V reference - making it optimal for space-constrained, high-fidelity multi-sensor systems where range flexibility and thermal stability are critical.

Availability

LTC2344-16 is available at Aetrix Electronics and suitable for industrial process control, medical imaging, high-speed data acquisition, and programmable logic controller applications requiring stable component supply, long-term lifecycle support, and guaranteed temperature-grade availability.

Supply support for LTC2344-16 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2344-16 belongs to Analog Devices' high-precision SAR ADC product line, designed specifically for demanding applications requiring simultaneous multi-channel sampling, wide input flexibility, and operation in extended temperature environments.

FAQ

What is the maximum sampling rate per channel for the LTC2344-16?

The LTC2344-16 achieves 400ksps per channel when all four channels are enabled simultaneously. Throughput increases to 500ksps, 666ksps, and 1000ksps when three, two, or one channel is active respectively - enabling adaptive bandwidth allocation in resource-constrained systems.

Does the LTC2344-16 require an external reference voltage?

No, the LTC2344-16 includes an internal 2.048V bandgap reference and a buffered 4.096V output (REFBUF). However, REFIN (Pin 10) accepts 1.25–2.2V external references for improved initial accuracy or temperature stability, and REFBUF (Pin 12) can be overdriven with 2.5–5V external sources when its internal buffer is disabled.

How does the SoftSpan feature work on the LTC2344-16?

The SoftSpan feature allows each of the four channels on the LTC2344-16 to be independently configured per conversion for ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V input ranges via SPI register writes - eliminating external signal conditioning components and enabling dynamic range adaptation without hardware changes.

What package type and thermal considerations apply to the LTC2344-16?

The LTC2344-16 is offered in a 32-lead 5mm × 5mm plastic QFN (UH package) with an exposed thermal pad (Pin 33). This pad must be soldered to a solid PCB ground plane to ensure proper thermal dissipation and electrical performance; θJA is specified at 44°C/W.

Can the LTC2344-16 interface directly with an FPGA using LVDS?

Yes, the LTC2344-16 supports pin-selectable LVDS serial I/O with differential SDO/SCK outputs and inputs. It provides 275–425mV differential output swing into 100Ω termination, 1.1–1.3V common-mode voltage, and <0.4ns skew - meeting standard LVDS timing and signaling requirements for reliable high-speed FPGA interfacing.