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

Analog Devices Inc. LTC2353HLX-18#PBF

Name: LTC2353HLX-18#PBF
Brand: Analog Devices Inc.
SKU: LTC2353HLX-18#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC2353HLX-18#PBF

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 48-LQFP

Datasheet:: LTC2353HLX-18#PBF.pdf

Description:: IC ADC 18BIT SAR 48LQFP

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Product details

Overview

LTC2353HLX-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, dual-channel simultaneous-sampling SAR ADC with buffered differential inputs, ±10.24V input range, 550ksps/ch throughput, and 96.4dB SNR. It features per-channel SoftSpan™ programmable input ranges (±10.24V/0–10.24V/±5.12V/0–5.12V), integrated 4.096V reference buffer, and rail-to-rail input overdrive tolerance - deployed in high-voltage industrial power line monitoring systems requiring wide dynamic range and channel-to-channel isolation.

For engineers reviewing the LTC2353HLX-18#PBF datasheet, LTC2353HLX-18#PBF pinout, LTC2353HLX-18#PBF application, or LTC2353HLX-18#PBF equivalent, this page delivers verified specifications including H-grade (–40°C to +125°C) operation, 500pA max input leakage at 125°C, 124dB CMRR, LVDS/CMOS serial interface support, and 48-lead LQFP package details - all validated against the official LTC2353-18 datasheet (235318f).

Technical Context

The LTC2353HLX-18#PBF implements a true simultaneous-sampling architecture using two independent SAR cores with shared internal clock and reference, enabling synchronized acquisition without inter-channel skew. Its picoamp-input analog buffers accept ±10.24V differential signals with 30V_P-P common-mode range (VEE + 4V to VCC – 4V), supporting direct connection to high-voltage sensor outputs without external signal conditioning.

It supports pin-selectable CMOS (1.8V–5V OVDD) or LVDS serial interfaces, with configurable one- or two-lane data output in CMOS mode. Internal conversion clock eliminates cycle latency, and the SoftSpan™ feature allows per-conversion range selection - critical for mixed-signal systems measuring both bipolar and unipolar transients within the same acquisition window.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	18-bit, guaranteed no missing codes - ensures full code coverage across entire input range for precision metrology.
Sampling Rate	550ksps per channel (dual-channel), 800ksps when single-channel enabled - enables real-time capture of fast transients in power quality analysis.
INL (Max)	±3.5LSB at ±10.24V range - limits absolute measurement error to ±13.9μV, critical for calibration-grade instrumentation.
SNR (Typ)	96.4dB at f_IN = 2kHz - provides >15.7 effective number of bits (ENOB), supporting high-fidelity waveform reconstruction.
Input Leakage (H-grade)	500pA max at +125°C - preserves signal integrity in high-impedance sensor interfaces without loading errors.
CMRR (Typ)	124dB at 200Hz - rejects common-mode noise from noisy industrial environments (e.g., motor drives, switch-mode supplies).
Power Dissipation	162mW typical at 550ksps (2-ch), 195mW in LVDS mode - balances performance and thermal management in compact enclosures.
Operating Temp	–40°C to +125°C (H-grade) - qualified for under-hood automotive, downhole oil & gas, and industrial control cabinet deployment.

Pinout & Package

48-lead (7mm × 7mm) plastic LQFP package (LX) with exposed pad; thermally enhanced for high-power-density applications. Pin functions include dual differential analog inputs (IN0±, IN1±), dedicated reference pins (REFIN, REFBUF), LVDS/CMOS configurable I/O (SDO0/SDO1/SCKI/SCKO/SDI/CS/BUSY/CNV), and separate analog/digital supply rails (VCC/VEE/VDD/OVDD/GND).

Pin/Terminal	Circuit Role	Design Meaning
IN0+, IN0– IN1+, IN1–	Differential analog inputs (Ch0, Ch1)	Buffered picoamp-input pairs accepting ±10.24V with 30V_P-P common-mode range; rail-to-rail overdrive tolerant.
REFIN, REFBUF	Reference input/buffer output	REFIN accepts 1.25–2.2V external reference; REFBUF provides 4.096V buffered output (2.5–5V range when overdriven).
SDO0, SDO1 SCKO, SCKI SDI, CS, BUSY, CNV	Configurable digital I/O	Pin-selectable LVDS or CMOS interface; supports 1- or 2-lane data output; CNV initiates conversion with precise timing control.
VCC, VEE VDD, OVDD GND	Supply and ground terminals	VCC/VEE: ±7.5V to ±16.5V analog supplies; VDD: 4.75–5.25V core; OVDD: 1.71–5.25V I/O; multiple GND pins minimize noise coupling.

Key Features

Feature	Design Value
Per-channel SoftSpan™ input range selection	Enables runtime reconfiguration between ±10.24V, 0–10.24V, ±5.12V, and 0–5.12V - eliminates need for external gain-switching circuitry.
Simultaneous sampling with <150ps aperture matching	Ensures phase-coherent acquisition across channels for accurate power vector calculations (e.g., voltage/current phase angle).
Integrated reference buffer (4.096V)	Delivers low-noise, high-drive reference without external op-amps - reduces BOM count and layout sensitivity.
Rail-to-rail input overdrive tolerance	Withstands analog inputs up to VCC or VEE without latch-up or conversion corruption - improves system robustness in fault conditions.
LVDS or CMOS serial interface (pin-selectable)	Supports noise-immune long-reach LVDS or low-cost CMOS interfacing - simplifies integration into FPGA or microcontroller-based data loggers.
H-grade temperature qualification (–40°C to +125°C)	Validated for extended thermal operation in harsh environments - eliminates derating concerns in industrial and transportation applications.

Applications

Power Line Monitoring	Industrial Process Control
Use Scenario: Real-time measurement of 50/60Hz AC voltage and current waveforms, harmonics, and transient events (e.g., surges, sags) in smart grid substations. IC Role / Device Role / Timing Role: Dual-channel simultaneous-sampling ADC capturing synchronized voltage and current for RMS, THD, and power factor calculation. Use Value: 96.4dB SNR and 124dB CMRR suppress noise from switching converters and arc furnaces, enabling Class A power quality compliance (IEC 61000-4-30).	Use Scenario: Closed-loop feedback of high-voltage actuator position and temperature in PLC-controlled manufacturing cells. IC Role / Device Role / Timing Role: High-precision digitization of isolated sensor outputs (e.g., LVDT, RTD bridges) with ±10.24V range and 500pA leakage at 125°C. Use Value: SoftSpan™ range flexibility accommodates varying sensor spans without hardware changes; H-grade rating ensures reliability in hot cabinet environments.
Test & Measurement Equipment	Energy Metering Systems
Use Scenario: Portable oscilloscope modules and automated test equipment capturing multi-channel analog signals with sub-μV resolution. IC Role / Device Role / Timing Role: 18-bit SAR ADC providing calibrated, no-missing-codes digitization with simultaneous sampling for time-aligned waveform analysis. Use Value: ±3.5LSB INL and 1.4LSB_RMS transition noise enable traceable calibration to NIST standards without post-processing correction.	Use Scenario: Revenue-grade polyphase energy meters measuring voltage, current, and neutral current in utility distribution panels. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring voltage and current simultaneously for active/reactive power computation per IEC 62053-21. Use Value: 550ksps/ch sampling captures >20th harmonic (1.2kHz) with Nyquist margin; integrated reference buffer ensures long-term accuracy drift <2.5ppm/°C.

Power Line Monitoring

Industrial Process Control

Use Scenario: Real-time measurement of 50/60Hz AC voltage and current waveforms, harmonics, and transient events (e.g., surges, sags) in smart grid substations.

IC Role / Device Role / Timing Role: Dual-channel simultaneous-sampling ADC capturing synchronized voltage and current for RMS, THD, and power factor calculation.

Use Value: 96.4dB SNR and 124dB CMRR suppress noise from switching converters and arc furnaces, enabling Class A power quality compliance (IEC 61000-4-30).

Use Scenario: Closed-loop feedback of high-voltage actuator position and temperature in PLC-controlled manufacturing cells.

IC Role / Device Role / Timing Role: High-precision digitization of isolated sensor outputs (e.g., LVDT, RTD bridges) with ±10.24V range and 500pA leakage at 125°C.

Use Value: SoftSpan™ range flexibility accommodates varying sensor spans without hardware changes; H-grade rating ensures reliability in hot cabinet environments.

Test & Measurement Equipment

Energy Metering Systems

Use Scenario: Portable oscilloscope modules and automated test equipment capturing multi-channel analog signals with sub-μV resolution.

IC Role / Device Role / Timing Role: 18-bit SAR ADC providing calibrated, no-missing-codes digitization with simultaneous sampling for time-aligned waveform analysis.

Use Value: ±3.5LSB INL and 1.4LSB_RMS transition noise enable traceable calibration to NIST standards without post-processing correction.

Use Scenario: Revenue-grade polyphase energy meters measuring voltage, current, and neutral current in utility distribution panels.

IC Role / Device Role / Timing Role: Dual-channel ADC acquiring voltage and current simultaneously for active/reactive power computation per IEC 62053-21.

Use Value: 550ksps/ch sampling captures >20th harmonic (1.2kHz) with Nyquist margin; integrated reference buffer ensures long-term accuracy drift <2.5ppm/°C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7606C-18	18-bit, 8-channel, pseudo-simultaneous sampling (not true simultaneous); 200ksps/ch; uses external reference; 64-lead LQFP.	Lower channel density but higher integration (on-chip PGA, anti-alias filter); suited for multi-sensor data acquisition, not ultra-low-latency phase-critical apps.	Select AD7606C-18 when cost-per-channel and channel count outweigh strict simultaneity requirements.
ADS8688	16-bit, 8-channel, true simultaneous sampling; 500ksps/ch; integrated ±10.24V input range; SPI-only CMOS interface; 64-lead TQFP.	2-bit lower resolution; no LVDS option; lower SNR (92dB); optimized for industrial automation vs. metrology-grade accuracy.	Select ADS8688 when 16-bit resolution suffices and 8-channel count justifies larger footprint and reduced dynamic range.

Compared with AD7606C-18 and ADS8688, the LTC2353HLX-18#PBF uniquely delivers true simultaneous 18-bit sampling at 550ksps/ch with LVDS capability, H-grade temperature range, and on-chip reference buffer - making it optimal for phase-sensitive, high-accuracy power analytics where timing coherence and thermal stability are non-negotiable.

Availability

LTC2353HLX-18#PBF is available at Aetrix Electronics and suitable for power line monitoring, industrial process control, and test & measurement applications requiring stable component supply, long-term lifecycle assurance, and guaranteed H-grade performance.

Supply support for LTC2353HLX-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 LTC2353-18 belongs to ADI's precision SAR ADC product line, engineered for high-voltage, high-dynamic-range applications demanding simultaneous sampling, low power, and exceptional DC/AC accuracy in harsh environments.

FAQ

What is the maximum operating temperature for the LTC2353HLX-18#PBF?

The LTC2353HLX-18#PBF is rated for continuous operation from –40°C to +125°C (H-grade), with all key specifications - including ±3.5LSB INL, 500pA input leakage, and 124dB CMRR - guaranteed across this full range. This exceeds standard industrial grade (–40°C to +85°C) and supports deployment in engine compartments, power converters, and sealed industrial enclosures without thermal derating.

Does the LTC2353HLX-18#PBF support true simultaneous sampling?

Yes, the LTC2353HLX-18#PBF implements true simultaneous sampling using two independent SAR cores with matched aperture delay (<150ps skew) and a shared internal clock. This ensures zero inter-channel phase error - essential for accurate power vector calculations, differential signal analysis, and coherent multi-channel waveform capture in the LTC2353HLX-18#PBF.

What input voltage ranges does the LTC2353HLX-18#PBF support via SoftSpan™?

The LTC2353HLX-18#PBF supports four per-channel SoftSpan™ configurations: ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V - selectable on a conversion-by-conversion basis via SPI command. This eliminates external gain-switching circuitry and enables adaptive range optimization for mixed-signal inputs within a single LTC2353HLX-18#PBF acquisition sequence.

Can the LTC2353HLX-18#PBF operate with LVDS or CMOS digital interfaces?

Yes, the LTC2353HLX-18#PBF supports pin-selectable LVDS or CMOS serial interfaces. LVDS mode offers noise immunity for long traces or noisy environments (VID = 200–600mV, VOCM = 1.1–1.3V), while CMOS mode supports flexible OVDD (1.71–5.25V) for direct interfacing with FPGAs or microcontrollers - both configured without firmware changes in the LTC2353HLX-18#PBF.

What is the role of the REFBUF pin on the LTC2353HLX-18#PBF?

The REFBUF pin on the LTC2353HLX-18#PBF provides a buffered 4.096V reference output (typical) with 2.5–5V programmable range when overdriven. It supplies low-impedance, low-noise excitation to external circuits (e.g., sensor bridges) and can drive the internal ADC reference - eliminating external reference ICs and reducing system noise and component count in the LTC2353HLX-18#PBF design.

LTC2353HLX-18#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: SoftSpan™

Package/Case:: 48-LQFP

Packaging:: Tray

Product Status:: Active

Number of Bits:: 18

Sampling Rate (Per Second):: 550k

Number of Inputs:: 2

Input Type:: Differential, Pseudo-Differential, Single Ended

Data Interface:: LVDS - Serial, SPI

Configuration:: S/H-MUX-ADC

Ratio - S/H:ADC:: 2:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: Internal

Voltage - Supply, Analog:: 7.5V ~ 38V

Voltage - Supply, Digital:: 4.75V ~ 5.25V

Features:: Simultaneous Sampling

Operating Temperature:: -40°C ~ 125°C

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

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

LTC2353HLX-18#PBF FAQ

1.How can I place an order for LTC2353HLX-18#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC2353HLX-18#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 LTC2353HLX-18#PBF reliable?

The price and inventory of LTC2353HLX-18#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2353HLX-18#PBF is usually 5 days.

3.What payment methods are accepted for LTC2353HLX-18#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2353HLX-18#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC2353HLX-18#PBF?

LTC2353HLX-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC2353HLX-18#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 LTC2353HLX-18#PBF?

For technical support, including LTC2353HLX-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2353HLX-18#PBF requirements.

6.How does Aetrix verify that LTC2353HLX-18#PBF is sourced from the original manufacturer or authorized distributors?

All LTC2353HLX-18#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 LTC2353HLX-18#PBF meets industry standards.

7.What is the process for return or replacement of LTC2353HLX-18#PBF?

All LTC2353HLX-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2353HLX-18#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 LTC2353HLX-18#PBF part is unused and in its original packaging.

Return procedure for LTC2353HLX-18#PBF:

1.Submit a request within 90 days.

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

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