Analog Devices Inc. LTC2341HUH-18#PBF

Overview

LTC2341HUH-18#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, 18-bit, simultaneous-sampling SAR ADC with differential inputs, ±4LSB INL, 95dB SNR, and per-channel SoftSpan™ programmable input ranges (±4.096V, 0–4.096V, ±2.048V, 0–2.048V). It operates at 666ksps per channel with rail-to-rail input overdrive tolerance and guaranteed operation up to +125°C - ideal for high-precision industrial process control and medical imaging signal chains.

For engineers reviewing the LTC2341HUH-18#PBF datasheet, LTC2341HUH-18#PBF pinout, LTC2341HUH-18#PBF application, or LTC2341HUH-18#PBF equivalent, key selection criteria include its dual simultaneous sampling capability, 105dB CMRR, LVDS/CMOS selectable interface, integrated 4.096V reference buffer, and H-grade temperature rating for harsh-environment deployments.

Technical Context

The LTC2341HUH-18#PBF implements a successive approximation register (SAR) architecture with internal conversion clock and zero cycle latency. Its analog front-end supports fully differential, bipolar, unipolar, and arbitrary common-mode drive configurations across two independent channels, each configurable on a conversion-by-conversion basis via SPI or LVDS control.

It features a wide 0V to VDD input common mode range, 22MHz –3dB input bandwidth, 3psRMS aperture jitter, and 150ps aperture delay matching between channels - enabling precise phase-coherent acquisition in multi-sensor systems without external synchronization overhead.

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 high-precision dual-channel ADC applications.

Compared with AD7606C-18 and ADS8688, the LTC2341HUH-18#PBF uniquely combines dual-channel simultaneity, per-conversion SoftSpan™ range selection, LVDS/CMOS interface flexibility, and H-grade temperature rating - making it optimal for space-constrained, high-fidelity, thermally demanding applications where timing coherence and input adaptability are critical.

Availability

LTC2341HUH-18#PBF is available at Aetrix Electronics and suitable for industrial process control, medical imaging subsystems, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed H-grade temperature performance.

Supply support for LTC2341HUH-18#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2341 family was designed by Linear Technology (acquired by ADI in 2017) specifically for high-accuracy, multi-channel data acquisition in thermally demanding environments - emphasizing simultaneous sampling integrity, flexible input scaling, and robust reference integration.

FAQ

What is the maximum sampling rate of the LTC2341HUH-18#PBF in dual-channel mode?

The LTC2341HUH-18#PBF achieves 666ksps per channel in dual-channel simultaneous sampling mode. When only one channel is enabled, throughput increases to 1000ksps. This is enabled by its internal conversion clock and zero-latency SAR architecture - no pipeline delay or dead time between conversions. The timing is fully specified across the –40°C to +125°C operating range for the H-grade variant.

Does the LTC2341HUH-18#PBF require an external reference voltage?

No, the LTC2341HUH-18#PBF includes an integrated 2.048V bandgap reference (on REFIN) and a buffered 4.096V master reference (on REFBUF), both fully characterized over temperature. External references are optional: REFIN accepts 1.25V–2.2V for improved accuracy, and REFBUF can be overdriven with 2.5V–5V when the internal buffer is disabled. For most H-grade industrial applications, the internal reference meets system accuracy targets without added components.

How does the SoftSpan™ feature work on the LTC2341HUH-18#PBF?

The SoftSpan™ feature on the LTC2341HUH-18#PBF allows independent, conversion-by-conversion configuration of each channel's input range: ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V. This is controlled via SPI or LVDS command bits - no hardware changes needed. It eliminates external gain-switching circuitry and enables adaptive signal conditioning in real time, such as switching between thermocouple (mV) and RTD (V) inputs within the same acquisition sequence.

What digital interface options does the LTC2341HUH-18#PBF support?

The LTC2341HUH-18#PBF supports both CMOS (1.71V–5.25V OVDD) and LVDS (2.375V–5.25V OVDD) serial interfaces, selected by the LVDS/CMOS pin. CMOS mode offers 1- or 2-lane data output for bus-width optimization; LVDS mode provides noise-immune differential signaling at higher speeds. Both support standard SPI-compatible timing and allow daisy-chaining or independent channel readout - critical for scalable multi-ADC systems.

Is the LTC2341HUH-18#PBF pin-compatible with other variants in the LTC2341 family?

Yes, all LTC2341-18 variants - including LTC2341CUH-18#PBF (C-grade), LTC2341IUH-18#PBF (I-grade), and LTC2341HUH-18#PBF (H-grade) - share identical 32-lead QFN (UH) packaging, pinout, and electrical interface. The only differences are temperature rating, AC/DC specifications over temperature, and power-down current (e.g., H-grade specifies ≤1.2µA in PD mode). This enables drop-in replacement during design-in or qualification upgrades.