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Analog Devices Inc. LTC2333ILX-18#PBF
- Part No.:
- LTC2333ILX-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2333ILX-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,098
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Product details
Overview
LTC2333ILX-18#PBF from Analog Devices is an 18-bit, 8-channel buffered SAR ADC with ±10.24V differential input range, 800ksps throughput, and 96.4dB SNR. It features picoamp-input buffers, 128dB CMRR, and SoftSpan™ programmable input ranges (±10.24V/0–10.24V/±5.12V/0–5.12V) per channel - ideal for high-voltage industrial process control signal acquisition.
For engineers reviewing the LTC2333ILX-18#PBF datasheet, LTC2333ILX-18#PBF pinout, LTC2333ILX-18#PBF application, or LTC2333ILX-18#PBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in PLCs and test equipment, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LTC2333ILX-18#PBF implements a successive approximation register architecture with integrated analog input buffers enabling direct connection to high-impedance sensors and ±30VP-P common-mode signals. Its SoftSpan™ digital control allows per-conversion range selection across eight differential channels without external hardware reconfiguration.
It supports dual serial interfaces: SPI CMOS (1.8V–5V I/O) and LVDS, both with programmable timing and bus enable/disable control. Internal 4.096V reference and buffer eliminate need for external precision references while maintaining ±3LSB INL over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no missing codes - ensures full dynamic range utilization in precision measurement systems. |
| Sampling Rate | 800ksps maximum - supports real-time monitoring of fast transients in motor control and power quality analyzers. |
| INL (Max) | ±3LSB at ±10.24V range - enables accurate DC-coupled voltage measurement with <0.001% linearity error. |
| SNR (Typ) | 96.4dB at fIN = 2kHz - delivers >15.7 effective bits for low-noise sensor digitization. |
| Input Leakage | 500pA max at 85°C - preserves signal integrity from high-impedance sources like piezoelectric sensors. |
| CMRR | 128dB typical - rejects common-mode noise in noisy industrial environments with unshielded wiring. |
| Power Dissipation | 268mW typical at 800ksps - balances performance and thermal management in compact industrial modules. |
Pinout & Package
48-lead (7mm × 7mm) plastic LQFP package with exposed pad; RoHS-compliant, lead-free finish (#PBF). Pin functions validated per Linear Technology (Analog Devices) LTC2333-18 datasheet Rev. F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ to IN7+ | Differential analog input positive | Accepts ±10.24V signals with rail-to-rail overdrive tolerance; buffered picoamp input minimizes loading. |
| IN0– to IN7– | Differential analog input negative | Supports true bipolar (IN– = 0V), fully differential (IN– = –IN+), or arbitrary common-mode drive up to ±30VP-P. |
| VCC / VEE | Analog supply rails | Wide-range supplies: VCC = +7.5V to +38V, VEE = –16.5V to 0V - enables direct interface to ±15V industrial buses. |
| 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) - supports mixed-voltage system integration. |
| REFIN / REFBUF | Reference input/output | REFIN accepts 1.25–2.2V external reference; REFBUF provides 4.096V buffered output (2.5–5V range when overdriven). |
| CS / CNV / BUSY / SDO / SCKO / SCKI / SDI | Serial interface control & data | Configurable SPI CMOS or LVDS interface with independent clock outputs (SCKO) and quiet timing windows for deterministic sampling. |
| PD | Power-down control | Active-high signal reduces current to ≤1.9μA - enables low-power wake-up sequencing in battery-backed data loggers. |
Key Features
| Feature | Design Value |
|---|---|
| SoftSpan™ Input Ranges | Per-channel software-selectable ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V - eliminates external gain-switching circuitry in multi-sensor systems. |
| Programmable Sequencer | Hardware-accelerated channel/range sequence execution with no latency between conversions - enables synchronized multi-point acquisition. |
| Rail-to-Rail Input Overdrive Tolerance | Withstands ±(VCC–VEE) differential overvoltage without corruption - protects against transient surges in factory automation I/O modules. |
| Integrated Reference Buffer | 4.096V output with 20kΩ impedance and 1.2mA load capability - drives ADC input and external circuitry without external op-amps. |
| 128dB CMRR & –125dB Crosstalk | Rejects noise from shared power rails and adjacent channels - critical for simultaneous acquisition in dense analog backplanes. |
Applications
| Programmable Logic Controllers (PLCs) | Industrial Process Control |
|---|---|
|
Use Scenario: Digitizing 4–20mA current loop outputs and ±10V analog sensor signals from pressure, temperature, and flow transmitters in modular I/O racks. IC Role / Device Role / Timing Role: Primary 18-bit ADC for analog input modules; handles 8 channels with independent SoftSpan™ range selection per scan cycle. Use Value: Eliminates external signal conditioning per channel, reducing BOM count by ≥4 op-amps and 2 precision references per module. |
Use Scenario: High-fidelity acquisition of reactor temperature gradients, valve position feedback, and chemical concentration sensors in distributed control systems (DCS). IC Role / Device Role / Timing Role: Precision front-end ADC in safety-critical loop controllers; uses internal sequencer for deterministic multi-channel sampling at 800ksps. Use Value: 96.4dB SNR and ±3LSB INL ensure sub-0.01% measurement accuracy required for ASME B31.4 compliance in pipeline monitoring. |
| Test and Measurement Equipment | High-Voltage Data Acquisition Systems |
|
Use Scenario: Embedded digitizer in portable power quality analyzers capturing harmonics, transients, and flicker on 3-phase AC mains (up to 600VRMS). IC Role / Device Role / Timing Role: Core ADC in isolated front-end stage; leverages ±10.24V range and 6MHz –3dB bandwidth for Class A compliance per IEC 61000-4-30 Ed. 3. Use Value: 420ns step response and 128dB CMRR enable accurate capture of 50/60Hz fundamental + 50th harmonic (3kHz) with minimal phase distortion. |
Use Scenario: Signal conditioning for partial discharge detection in HV transformers and switchgear, requiring wide common-mode rejection of switching noise. IC Role / Device Role / Timing Role: Buffered differential ADC interfacing to HV resistive dividers; uses picoamp inputs to avoid loading 10MΩ+ divider networks. Use Value: 500pA input leakage at 85°C maintains <0.1% gain error in 1000:1 HV dividers, critical for PD magnitude calibration traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 18-bit, 8-channel, ±10V range, but fixed input range per group (not per channel); 200ksps max; integrated PGA not present. | Requires external multiplexing for mixed-range inputs; lower throughput limits real-time FFT analysis. | Select when cost sensitivity outweighs per-channel flexibility and speed requirements. |
| ADS8688 | 18-bit, 8-channel, ±10.24V range, but no internal reference/buffer; requires external 4.096V ref and op-amp drivers. | Higher board area and power due to external components; lacks SoftSpan™ dynamic range switching. | Select when existing design already includes precision reference and driver infrastructure. |
Compared with AD7606C-18 and ADS8688, the LTC2333ILX-18#PBF uniquely combines per-channel SoftSpan™ range selection, integrated reference buffer, and 800ksps throughput - enabling single-chip solutions for mixed-signal industrial I/O where layout space, component count, and acquisition speed are constrained.
Availability
LTC2333ILX-18#PBF is available at Aetrix Electronics and suitable for industrial process control, programmable logic controllers, and test and measurement equipment requiring stable component supply across extended temperature operation (–40°C to +85°C).
Supply support for LTC2333ILX-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2333-18 belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-voltage industrial data acquisition where wide common-mode range, low leakage, and flexible input scaling are essential.
FAQ
What is the operating temperature range for the LTC2333ILX-18#PBF?
The LTC2333ILX-18#PBF is rated for –40°C to +85°C ambient operation, matching the I-grade specification defined in the official datasheet. This range is validated across all electrical parameters including INL, SNR, and input leakage current, making it suitable for deployment in industrial enclosures without forced cooling.
Does the LTC2333ILX-18#PBF require an external reference voltage?
No - the LTC2333ILX-18#PBF includes an internal 4.096V reference and a dedicated reference buffer (REFBUF pin). It can operate fully autonomously using this internal reference, though REFIN accepts an external 1.25–2.2V source if higher accuracy or custom scaling is needed.
How does the SoftSpan™ feature work on the LTC2333ILX-18#PBF?
SoftSpan™ allows software configuration of each channel's input range on a per-conversion basis via SPI command. Supported ranges include ±10.24V, 0–10.24V, ±5.12V, and 0–5.12V - enabling mixed-signal acquisition (e.g., thermocouple + strain gauge) without external gain switches or relays.
What serial interface options does the LTC2333ILX-18#PBF support?
The LTC2333ILX-18#PBF supports both SPI CMOS (1.8V–5V logic levels) and LVDS differential serial interfaces, selected via hardware pin (LVDS/CMOS). LVDS mode provides noise immunity for long traces in electrically noisy environments, while CMOS simplifies integration with standard microcontrollers.
Can the LTC2333ILX-18#PBF directly interface with ±15V analog signals?
Yes - the LTC2333ILX-18#PBF accepts analog inputs with common-mode voltages from VEE + 4V to VCC – 4V. With VCC = +15V and VEE = –15V, it supports ±10.24V differential signals and up to ±30VP-P common-mode range, enabling direct connection to standard industrial ±15V op-amp outputs.
LTC2333ILX-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):
- 800k
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 7.5V ~ 38V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2333ILX-18#PBF FAQ
1.How can I place an order for LTC2333ILX-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2333ILX-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 LTC2333ILX-18#PBF reliable?
The price and inventory of LTC2333ILX-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 LTC2333ILX-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2333ILX-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2333ILX-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2333ILX-18#PBF?
LTC2333ILX-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2333ILX-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 LTC2333ILX-18#PBF?
For technical support, including LTC2333ILX-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2333ILX-18#PBF requirements.
6.How does Aetrix verify that LTC2333ILX-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2333ILX-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 LTC2333ILX-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2333ILX-18#PBF?
All LTC2333ILX-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2333ILX-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 LTC2333ILX-18#PBF part is unused and in its original packaging.
Return procedure for LTC2333ILX-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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