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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. LTC2348CLX-16#PBF

Name: LTC2348CLX-16#PBF
Brand: Analog Devices Inc.
SKU: LTC2348CLX-16#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC2348CLX-16#PBF

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 48-LQFP

Datasheet:: LTC2348CLX-16#PBF.pdf

Description:: IC ADC 16BIT SAR 48LQFP

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Product details

Overview

LTC2348CLX-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, octal-channel simultaneous-sampling SAR ADC with differential inputs, ±10.24V SoftSpan configurable ranges, 200ksps per channel throughput, and integrated 4.096V reference buffer. It operates from ±15V analog supplies and 5V digital supply, delivering 94.4dB SNR and ±1LSB INL for high-precision industrial voltage monitoring.

For engineers reviewing the LTC2348CLX-16#PBF datasheet, LTC2348CLX-16#PBF pinout, LTC2348CLX-16#PBF application, or LTC2348CLX-16#PBF equivalent, this page provides verified specifications, package mapping, real-world use cases in power line monitoring and PLCs, and validated alternative options for system-level design continuity.

Technical Context

The LTC2348CLX-16#PBF implements an 8-channel simultaneous sampling architecture using independent track-and-hold circuits per channel, enabling true time-aligned digitization of multi-sensor inputs without inter-channel skew. Its SoftSpan™ input flexibility allows per-conversion selection among ±10.24V, 0–10.24V, ±5.12V, and 0–5.12V ranges via SPI configuration.

It supports dual serial interfaces - pin-selectable CMOS (1.8V–5V I/O) and LVDS - with programmable lane count (1–8 lanes) to balance data rate and bus loading. Internal conversion clock eliminates external timing dependencies, and rail-to-rail input overdrive tolerance ensures robustness against transient excursions beyond nominal common-mode limits.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	16-bit with guaranteed no missing codes - ensures full dynamic range utilization in closed-loop control and metrology.
Sampling Rate	200ksps per channel (8-channel mode) - supports real-time waveform capture at 5µs inter-sample interval for power quality analysis.
INL / DNL	±1LSB max INL, ±0.9LSB max DNL - enables <1 LSB error in precision sensor interfacing without calibration.
SNR / THD	94.4dB SNR, –109dB THD (f_IN = 2kHz) - meets Class A power metering accuracy requirements per IEC 62053-22.
Input Common Mode	VEE to VCC–4V (e.g., –15V to +11V with ±15V supplies) - accepts wide-range bipolar signals without external level-shifting circuitry.
CMRR	118dB typical at 200Hz - rejects noise from shared ground paths in motor drive current sensing applications.
Reference	Integrated 4.096V buffered reference (±20ppm/°C TC) - eliminates external reference IC and reduces BOM count in space-constrained designs.
Package	48-lead 7mm × 7mm LQFP (LX) - compatible with standard SMT reflow profiles and industrial-grade thermal cycling (0°C to 70°C).

Pinout & Package

48-lead plastic LQFP (7mm × 7mm, LX package), RoHS-compliant, lead-free finish. Pin 1 marked by dot; exposed pad not electrically connected.

Pin/Terminal	Circuit Role	Design Meaning
IN0+ to IN7+	Differential analog input positive	Accepts signal up to VCC–4V; supports true bipolar (IN– = 0V), fully differential (IN– = –IN+), or arbitrary common-mode drive.
IN0– to IN7–	Differential analog input negative	Wide common-mode range (VEE to VCC–4V); 118dB CMRR enables direct connection to shunt-based current sensors.
VCC / VEE	Analog supply rails	Supports ±15V operation (–16.5V ≤ VEE ≤ 0V, 0V ≤ VCC ≤ 38V); 10V–38V differential range accommodates legacy industrial supplies.
VDD / OVDD	Digital core & I/O supply	VDD = 4.75–5.25V for logic core; OVDD = 1.71–5.25V (CMOS) or 2.375–5.25V (LVDS) - enables mixed-voltage system integration.
REFIN / REFBUF	Reference input/output	REFIN accepts 1.25–2.2V external reference; REFBUF delivers 4.096V buffered output (1.5mA load capability) for all 8 channels.
CNV / BUSY / CS	Conversion control	CNV initiates sample; BUSY indicates conversion in progress; CS enables SPI/LVDS interface - supports deterministic timing in real-time OS environments.
SDO0–SDO7 / SCKO / SCKI / SDI	Serial data interface	Configurable 1–8-lane CMOS or LVDS output; SCKO is source-synchronous clock; supports daisy-chain or parallel readout topologies.
PD	Power-down control	Active-high input; reduces supply current to <1μA (C-grade) - enables low-power wake-on-event architectures in remote monitoring nodes.

Key Features

Feature	Design Value
Per-channel SoftSpan™ input range selection	Independent configuration of ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V per conversion - eliminates external gain-switching circuitry in multi-sensor DAQ systems.
Simultaneous sampling with aperture matching	150ps max aperture delay mismatch across all 8 channels - preserves phase coherence for vector measurements in three-phase power analyzers.
Rail-to-rail input overdrive tolerance	Withstands differential overvoltage up to ±(VCC–VEE) without corruption - protects against transients in industrial motor control feedback loops.
Internal reference buffer with wake-up time	4.096V output stable within 200ms after PD deassertion (CREFBUF = 47μF) - enables fast wake-from-sleep response in battery-backed energy meters.
Guaranteed operation to 125°C (H-grade variant)	This C-grade part (0°C to 70°C) shares identical pinout and register map with H-grade - simplifies thermal derating and platform reuse across temperature grades.
LVDS/CMOS interface selectability	Hardware-pin selectable I/O standard - supports noise-immune long-cable runs (LVDS) or low-cost PCB routing (CMOS) without redesign.

Applications

Programmable Logic Controllers	Industrial Process Control
Use Scenario: Digitizing 8 analog inputs from 4–20mA current loops, thermocouples, and strain gauges in modular PLC backplanes. IC Role / Device Role / Timing Role: Simultaneous-sampling ADC providing time-aligned 16-bit data for PID loop execution at 1ms intervals. Use Value: Eliminates channel-to-channel skew-induced control instability; ±1LSB INL ensures repeatability in closed-loop setpoint accuracy.	Use Scenario: Monitoring pressure, flow, and temperature in chemical reactor control systems with redundant sensor inputs. IC Role / Device Role / Timing Role: High-CMRR ADC rejecting ground-bounce noise from solenoid valve switching on shared 24V DC bus. Use Value: 118dB CMRR prevents false trips during high-dI/dt events; SoftSpan allows unified firmware handling of 0–10V and ±5V sensor outputs.
Power Line Monitoring	Test and Measurement
Use Scenario: Capturing voltage and current waveforms across all three phases plus neutral in Class A power quality analyzers. IC Role / Device Role / Timing Role: Octal simultaneous-sampling front-end synchronizing voltage/current pairs for harmonic and flicker analysis. Use Value: 94.4dB SNR and –109dB THD meet IEC 61000-4-30 Ed.3 amplitude accuracy requirements for 50/60Hz fundamental and harmonics up to 50th order.	Use Scenario: Embedded digitizer in portable oscilloscopes and automated test equipment requiring multi-channel synchronized acquisition. IC Role / Device Role / Timing Role: Low-latency SAR ADC with internal clock and no cycle latency - enables deterministic trigger-to-acquisition timing. Use Value: 500ns typical conversion time per channel allows >1MS/s aggregate throughput; LVDS interface supports >100MHz data streaming to FPGA memory buffers.

Programmable Logic Controllers

Industrial Process Control

Use Scenario: Digitizing 8 analog inputs from 4–20mA current loops, thermocouples, and strain gauges in modular PLC backplanes.

IC Role / Device Role / Timing Role: Simultaneous-sampling ADC providing time-aligned 16-bit data for PID loop execution at 1ms intervals.

Use Value: Eliminates channel-to-channel skew-induced control instability; ±1LSB INL ensures repeatability in closed-loop setpoint accuracy.

Use Scenario: Monitoring pressure, flow, and temperature in chemical reactor control systems with redundant sensor inputs.

IC Role / Device Role / Timing Role: High-CMRR ADC rejecting ground-bounce noise from solenoid valve switching on shared 24V DC bus.

Use Value: 118dB CMRR prevents false trips during high-dI/dt events; SoftSpan allows unified firmware handling of 0–10V and ±5V sensor outputs.

Power Line Monitoring

Test and Measurement

Use Scenario: Capturing voltage and current waveforms across all three phases plus neutral in Class A power quality analyzers.

IC Role / Device Role / Timing Role: Octal simultaneous-sampling front-end synchronizing voltage/current pairs for harmonic and flicker analysis.

Use Value: 94.4dB SNR and –109dB THD meet IEC 61000-4-30 Ed.3 amplitude accuracy requirements for 50/60Hz fundamental and harmonics up to 50th order.

Use Scenario: Embedded digitizer in portable oscilloscopes and automated test equipment requiring multi-channel synchronized acquisition.

IC Role / Device Role / Timing Role: Low-latency SAR ADC with internal clock and no cycle latency - enables deterministic trigger-to-acquisition timing.

Use Value: 500ns typical conversion time per channel allows >1MS/s aggregate throughput; LVDS interface supports >100MHz data streaming to FPGA memory buffers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision multichannel ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7606C-16	16-bit, 8-channel, ±10V input, 1MSPS total throughput (not per channel); uses external reference; no LVDS option.	Higher aggregate sampling rate but sequential (not simultaneous) sampling - unsuitable for phase-sensitive power measurements.	Select when system requires higher total throughput and can tolerate channel skew; verify external reference stability meets 16-bit performance.
ADS8688	16-bit, 8-channel, pseudo-simultaneous sampling (shared T/H); 500ksps total; internal ±5.1V reference; SPI-only CMOS interface.	Lacks true simultaneous sampling and SoftSpan flexibility - limited to fixed unipolar/bipolar ranges per device configuration.	Choose for cost-sensitive industrial I/O modules where per-channel timing alignment is non-critical and ±5.1V range suffices.

Compared with AD7606C-16 and ADS8688, the LTC2348CLX-16#PBF uniquely delivers true simultaneous sampling with per-channel SoftSpan range selection and LVDS interface - critical for vector-based power analytics and noise-immune data acquisition in electrically harsh environments.

Availability

LTC2348CLX-16#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and power line monitoring equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2348CLX-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 and maintains full product support, documentation, and manufacturing continuity for the LTC portfolio.

The LTC2348 family targets high-accuracy industrial data acquisition, emphasizing simultaneous sampling, flexible input ranges, and robust noise immunity in harsh electromagnetic environments.

FAQ

What is the operating temperature range for the LTC2348CLX-16#PBF?

The LTC2348CLX-16#PBF is specified for 0°C to 70°C ambient operation (Commercial grade). This is confirmed in the "Order Information" table and Absolute Maximum Ratings section, where LTC2348C denotes the commercial temperature grade. The LX package and #PBF suffix align with this grade.

Does the LTC2348CLX-16#PBF require an external reference?

No, the LTC2348CLX-16#PBF includes an integrated 4.096V reference buffer (REFBUF) capable of driving all eight channels. An external reference may be applied via REFIN (1.25–2.2V), but it is optional - the internal reference is fully functional and characterized across temperature.

Can the LTC2348CLX-16#PBF interface directly with a 1.8V microcontroller?

Yes. The LTC2348CLX-16#PBF supports CMOS I/O with OVDD down to 1.71V, allowing direct connection to 1.8V logic without level shifters. The VIH/VIL thresholds scale with OVDD (0.8•OVDD / 0.2•OVDD), ensuring reliable signaling at 1.8V.

How does the SoftSpan™ feature work on the LTC2348CLX-16#PBF?

SoftSpan™ allows each of the eight channels to be independently configured per conversion for ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V input ranges via SPI register writes. This is implemented in hardware with internal gain/offset calibration - no external components or firmware compensation required.

What is the maximum sampling rate when only four channels are enabled on the LTC2348CLX-16#PBF?

When four channels are enabled, the LTC2348CLX-16#PBF achieves 375ksps per channel (tCYC = 2666ns), as specified in the ADC Timing Characteristics table. Total aggregate throughput is 1.5MSPS, maintaining simultaneous sampling across the active channels.

Is the LTC2348CLX-16#PBF pin-compatible with other variants like LTC2348ILX-16#PBF?

Yes. All LX-package variants (C-, I-, and H-grade) share identical 48-lead LQFP pinout, register map, and electrical interface. Only the temperature rating and some parametric limits (e.g., supply current in power-down mode) differ - enabling drop-in replacement during qualification or thermal redesign.

LTC2348CLX-16#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: SoftSpan™

Package/Case:: 48-LQFP

Packaging:: Tray

Product Status:: Active

Number of Bits:: 16

Sampling Rate (Per Second):: 200k

Number of Inputs:: 8

Input Type:: Differential, Pseudo-Differential

Data Interface:: LVDS - Serial, SPI

Configuration:: S/H-MUX-ADC

Ratio - S/H:ADC:: 8:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External, Internal

Voltage - Supply, Analog:: 5V

Voltage - Supply, Digital:: 5V

Features:: Simultaneous Sampling

Operating Temperature:: 0°C ~ 70°C

Supplier Device Package:: 48-LQFP (7x7)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

LTC2348CLX-16#PBF FAQ

1.How can I place an order for LTC2348CLX-16#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC2348CLX-16#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LTC2348CLX-16#PBF reliable?

The price and inventory of LTC2348CLX-16#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2348CLX-16#PBF is usually 5 days.

3.What payment methods are accepted for LTC2348CLX-16#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2348CLX-16#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC2348CLX-16#PBF?

LTC2348CLX-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC2348CLX-16#PBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LTC2348CLX-16#PBF?

For technical support, including LTC2348CLX-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2348CLX-16#PBF requirements.

6.How does Aetrix verify that LTC2348CLX-16#PBF is sourced from the original manufacturer or authorized distributors?

All LTC2348CLX-16#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2348CLX-16#PBF meets industry standards.

7.What is the process for return or replacement of LTC2348CLX-16#PBF?

All LTC2348CLX-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2348CLX-16#PBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LTC2348CLX-16#PBF part is unused and in its original packaging.

Return procedure for LTC2348CLX-16#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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