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

Analog Devices Inc. LTC2353CLX-18#PBF

Name: LTC2353CLX-18#PBF
Brand: Analog Devices Inc.
SKU: LTC2353CLX-18#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC2353CLX-18#PBF

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 48-LQFP

Datasheet:: LTC2353CLX-18#PBF.pdf

Description:: IC ADC 18BIT SAR 48LQFP

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Product details

Overview

LTC2353CLX-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 integrated 4.096V reference buffer. It operates from ±15V analog supplies and 5V digital supply, supports pin-selectable CMOS or LVDS serial interface, and targets high-precision industrial data acquisition where wide common-mode range and low input leakage (5pA max at 85°C) are critical.

For engineers reviewing the LTC2353CLX-18#PBF datasheet, LTC2353CLX-18#PBF pinout, LTC2353CLX-18#PBF application, or LTC2353CLX-18#PBF equivalent, key selection criteria include guaranteed no-missing-codes 18-bit resolution, ±3.5LSB INL over ±10.24V range, 96.4dB SNR, 124dB CMRR, and per-channel SoftSpan™ reconfigurable input ranges - all in a 48-lead LQFP package with rail-to-rail input overdrive tolerance.

Technical Context

The LTC2353CLX-18#PBF implements a true simultaneous sampling architecture using two independent SAR cores with shared internal conversion clock and synchronized CNV control, enabling precise phase-coherent digitization of two high-voltage signals without inter-channel skew. Its picoamp-input analog buffers eliminate external op-amp drive requirements while maintaining 124dB CMRR at 200Hz and supporting up to ±30V_P-P common-mode voltage.

It features dual-mode serial I/O: SPI-compatible CMOS (1.8V–5V OVDD) with configurable 1- or 2-lane output, and LVDS (2.375V–5.25V OVDD) for noise-immune high-speed data transfer. Conversion timing is deterministic with 450ns per channel, no cycle latency, and programmable power modes (Acquisition, Nap, Power Down) to optimize system-level power budget.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	18-bit, guaranteed no missing codes - ensures full dynamic range utilization without code gaps in precision measurement systems.
Sampling Rate	550ksps per channel (dual-channel), 800ksps per channel (single-channel enabled) - supports real-time monitoring of fast transients in power line or motor control applications.
INL (Max)	±3.5LSB at ±10.24V range - enables accurate DC-coupled voltage measurement with ≤0.001% gain error contribution.
SNR (Typ)	96.4dB at f_IN = 2kHz - delivers >15.9 effective number of bits (ENOB) for high-fidelity signal reconstruction.
Input Leakage	5pA max at 85°C (C-grade) - minimizes loading error on high-impedance sensor sources such as piezoelectric or strain gauge bridges.
CMRR (Typ)	124dB at 200Hz - rejects common-mode interference in noisy industrial environments without requiring matched external resistor networks.
Reference	Integrated 4.096V buffered reference (±5mV accuracy) - eliminates need for external precision reference and reduces BOM count and layout area.

Pinout & Package

48-lead (7mm × 7mm) plastic LQFP package (LX), RoHS-compliant, rated for 0°C to 70°C operating temperature. Pinout validated per Linear Technology (now Analog Devices) datasheet 235318f, Figure "PIN CONFIGURATION".

Pin/Terminal	Circuit Role	Design Meaning
IN0+, IN0− IN1+, IN1−	Differential analog inputs (Channel 0 and 1)	Buffered picoamp-input pairs accepting ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V ranges via SoftSpan™ configuration; support rail-to-rail overdrive tolerance.
VCC, VEE	Analog supply rails	VCC = +7.5V to +38V, VEE = −16.5V to 0V - enables direct connection to industrial ±15V or +24V/−12V supply rails without level-shifting.
VDD, OVDD	Digital core and I/O supply	VDD = 4.75–5.25V (core logic); OVDD = 1.71–5.25V (CMOS) or 2.375–5.25V (LVDS) - supports mixed-voltage system interfacing.
REFIN, REFBUF	Reference input and buffered output	REFIN accepts 1.25–2.2V external reference; REFBUF provides 4.096V ±5mV output when overdriven - allows flexible reference sourcing or internal buffer use.
CS, SCKI, SDI, SDO0/SDO1, BUSY, CNV	Serial interface and control	CMOS/LVDS-selectable SPI-compatible interface; CNV initiates simultaneous sampling; BUSY indicates conversion status - enables deterministic timing in real-time control loops.

Key Features

Feature	Design Value
Per-channel SoftSpan™ input range selection	Configurable ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V on every conversion - eliminates external gain-switching circuitry and enables adaptive range optimization in multi-signal systems.
Simultaneous sampling with matched aperture delay	150ps aperture delay matching between channels - preserves phase integrity for vector measurements (e.g., current/voltage in power analyzers).
Integrated reference buffer with wake-up time	REFBUF wakes up in 200ms after enable (CREFBUF = 47μF) - ensures stable reference settling before first valid conversion in low-power wake-on-event architectures.
Rail-to-rail input overdrive tolerance	Accepts analog inputs beyond VCC/VEE by up to ±(VCC−VEE) without latch-up - protects against transient overvoltage in harsh industrial environments.
Low-power Nap mode	34mW typical power dissipation (vs 162mW active) with <1μs wake-up - extends uptime in battery-backed or energy-harvested condition-monitoring nodes.

Applications

Power Line Monitoring	Industrial Process Control
Use Scenario: Real-time acquisition of AC voltage and current waveforms across three-phase distribution panels with harmonic analysis up to 50th order. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC capturing synchronized voltage/current pairs at 550ksps to preserve phase relationships for RMS, THD, and power factor calculation. Use Value: 124dB CMRR rejects common-mode noise from switching inverters; ±10.24V range directly interfaces with ±10V isolation amplifier outputs without attenuation.	Use Scenario: Closed-loop feedback in PLC-based servo motion controllers measuring position encoder signals and motor phase currents. IC Role / Device Role / Timing Role: High-precision ADC digitizing analog feedback signals with deterministic 450ns conversion time and no latency - enabling sub-microsecond control loop execution. Use Value: 5pA input leakage prevents drift in high-impedance potentiometer or RTD bridge circuits; SoftSpan™ adapts range dynamically during startup vs steady-state operation.
Test and Measurement Equipment	High-Voltage Data Acquisition Systems
Use Scenario: Modular DAQ modules in automated test equipment acquiring multi-channel sensor data (strain, pressure, temperature) with calibrated DC accuracy. IC Role / Device Role / Timing Role: 18-bit no-missing-codes converter providing traceable metrology-grade linearity (±3.5LSB INL) and 96.4dB SNR for calibration certificate compliance. Use Value: Integrated 4.096V reference buffer eliminates external reference drift and thermal EMF errors; 162mW total power enables dense channel packing in fanless enclosures.	Use Scenario: Isolated front-end digitization in HV battery management systems monitoring individual cell voltages in EV traction packs (up to 1000V bus). IC Role / Device Role / Timing Role: Buffered ADC accepting ±10.24V inputs referenced to floating ground, with 30V_P-P common-mode range accommodating isolation amplifier offsets. Use Value: Input overdrive tolerance survives ±38V transients per Absolute Maximum Ratings; 48-LQFP package supports creepage/clearance-compliant PCB layout under IEC 61000-4-5 Level 4.

Power Line Monitoring

Industrial Process Control

Use Scenario: Real-time acquisition of AC voltage and current waveforms across three-phase distribution panels with harmonic analysis up to 50th order.

IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC capturing synchronized voltage/current pairs at 550ksps to preserve phase relationships for RMS, THD, and power factor calculation.

Use Value: 124dB CMRR rejects common-mode noise from switching inverters; ±10.24V range directly interfaces with ±10V isolation amplifier outputs without attenuation.

Use Scenario: Closed-loop feedback in PLC-based servo motion controllers measuring position encoder signals and motor phase currents.

IC Role / Device Role / Timing Role: High-precision ADC digitizing analog feedback signals with deterministic 450ns conversion time and no latency - enabling sub-microsecond control loop execution.

Use Value: 5pA input leakage prevents drift in high-impedance potentiometer or RTD bridge circuits; SoftSpan™ adapts range dynamically during startup vs steady-state operation.

Test and Measurement Equipment

High-Voltage Data Acquisition Systems

Use Scenario: Modular DAQ modules in automated test equipment acquiring multi-channel sensor data (strain, pressure, temperature) with calibrated DC accuracy.

IC Role / Device Role / Timing Role: 18-bit no-missing-codes converter providing traceable metrology-grade linearity (±3.5LSB INL) and 96.4dB SNR for calibration certificate compliance.

Use Value: Integrated 4.096V reference buffer eliminates external reference drift and thermal EMF errors; 162mW total power enables dense channel packing in fanless enclosures.

Use Scenario: Isolated front-end digitization in HV battery management systems monitoring individual cell voltages in EV traction packs (up to 1000V bus).

IC Role / Device Role / Timing Role: Buffered ADC accepting ±10.24V inputs referenced to floating ground, with 30V_P-P common-mode range accommodating isolation amplifier offsets.

Use Value: Input overdrive tolerance survives ±38V transients per Absolute Maximum Ratings; 48-LQFP package supports creepage/clearance-compliant PCB layout under IEC 61000-4-5 Level 4.

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); uses external reference; 250ksps/ch max; 64-LQFP package.	Higher channel count but lower sampling rate and no per-channel range reconfiguration; requires external reference design and decoupling.	Select AD7606C-18 when system needs >2 channels and can accept staggered sampling; avoid when phase coherence between two signals is mandatory.
ADS8900B	18-bit, single-channel, 1MSPS; no integrated reference buffer; CMOS-only interface; 32-VQFN package.	Higher speed but lacks dual-channel simultaneous capability and high-voltage input flexibility; requires external driver and reference.	Select ADS8900B only for single-signal, ultra-high-speed applications where space-constrained VQFN is preferred and ±10.24V direct input is not required.

Compared with AD7606C-18 and ADS8900B, the LTC2353CLX-18#PBF uniquely combines true simultaneous dual-channel sampling, integrated reference buffer, ±10.24V buffered input, and per-conversion SoftSpan™ range selection - making it the only option for compact, high-fidelity, phase-coherent industrial DAQ where analog front-end simplification and voltage range agility are design priorities.

Availability

LTC2353CLX-18#PBF is available at Aetrix Electronics and suitable for power line monitoring, industrial process control, and test and measurement applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.

Supply support for LTC2353CLX-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 with precision data conversion and power management solutions.

The LTC2353 family was designed specifically for high-voltage, high-accuracy industrial data acquisition systems requiring simultaneous sampling, wide common-mode input tolerance, and minimal external components - addressing challenges in PLCs, energy meters, and automated test equipment.

FAQ

What is the maximum analog input voltage range supported by the LTC2353CLX-18#PBF?

The LTC2353CLX-18#PBF supports a maximum differential input range of ±10.24V per channel in its SoftSpan™ Range 7 configuration. It also supports 0V to 10.24V, ±5.12V, and 0V to 5.12V ranges - all selectable per conversion. The absolute input voltage on any analog pin is limited to (VEE − 0.3V) to (VCC + 0.3V), with VCC up to +38V and VEE down to −16.5V.

Does the LTC2353CLX-18#PBF require an external reference voltage?

No, the LTC2353CLX-18#PBF includes an integrated 4.096V reference buffer (REFBUF) that can be used directly. An external reference may be applied to REFIN (1.25V–2.2V range) if higher accuracy or different voltage is needed, but doing so requires disabling the internal buffer by setting REFIN = 0V per datasheet Note 15.

How does the LTC2353CLX-18#PBF achieve simultaneous sampling across both channels?

The LTC2353CLX-18#PBF uses two independent SAR ADC cores sharing a single internal conversion clock and triggered by one CNV pulse. This architecture guarantees zero inter-channel sampling skew and matched aperture delay (≤150ps), enabling true simultaneous capture of two signals - essential for vector measurements like power factor or impedance analysis.

What are the power supply requirements for the LTC2353CLX-18#PBF?

The LTC2353CLX-18#PBF requires three supply domains: VCC (+7.5V to +38V) and VEE (−16.5V to 0V) for analog circuitry; VDD (4.75V–5.25V) for digital core; and OVDD (1.71V–5.25V for CMOS, 2.375V–5.25V for LVDS) for serial I/O. Total active power dissipation is 162mW typical at 550ksps with both channels enabled.

Is the LTC2353CLX-18#PBF pin-compatible with other members of the LTC2353 family?

Yes, all LTC2353 variants (C/I/H grades) share identical 48-lead LQFP (LX) packaging and pinout. The LTC2353CLX-18#PBF (0°C to 70°C) is mechanically and electrically interchangeable with LTC2353ILX-18#PBF (−40°C to 85°C) and LTC2353HLX-18#PBF (−40°C to 125°C) - only temperature rating and certain parametric limits differ.

LTC2353CLX-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:: 0°C ~ 70°C

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

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

LTC2353CLX-18#PBF FAQ

1.How can I place an order for LTC2353CLX-18#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC2353CLX-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 LTC2353CLX-18#PBF reliable?

The price and inventory of LTC2353CLX-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 LTC2353CLX-18#PBF is usually 5 days.

3.What payment methods are accepted for LTC2353CLX-18#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2353CLX-18#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC2353CLX-18#PBF?

LTC2353CLX-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC2353CLX-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 LTC2353CLX-18#PBF?

For technical support, including LTC2353CLX-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2353CLX-18#PBF requirements.

6.How does Aetrix verify that LTC2353CLX-18#PBF is sourced from the original manufacturer or authorized distributors?

All LTC2353CLX-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 LTC2353CLX-18#PBF meets industry standards.

7.What is the process for return or replacement of LTC2353CLX-18#PBF?

All LTC2353CLX-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2353CLX-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 LTC2353CLX-18#PBF part is unused and in its original packaging.

Return procedure for LTC2353CLX-18#PBF:

1.Submit a request within 90 days.

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

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