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Analog Devices Inc. LTC2333CLX-18#PBF
- Part No.:
- LTC2333CLX-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2333CLX-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:192
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Product details
Overview
LTC2333CLX-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 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. It serves as a high-precision front-end digitizer in industrial process control systems requiring wide common-mode range and low input leakage.
For engineers reviewing the LTC2333CLX-18#PBF datasheet, LTC2333CLX-18#PBF pinout, LTC2333CLX-18#PBF application, or LTC2333CLX-18#PBF equivalent, this page delivers verified specifications including ±3LSB INL at ±10.24V range, 128dB CMRR, 48-pin LQFP package mapping, SPI/LVDS interface options, and confirmed alternatives for high-voltage multiplexed data acquisition.
Technical Context
The LTC2333CLX-18#PBF implements a successive approximation register (SAR) architecture with picoamp-input analog buffers enabling direct connection to high-impedance sensors. Its SoftSpan™ configuration allows per-conversion selection of four bipolar/unipolar input ranges using internal reference and buffer, eliminating external gain/level-shifting circuitry.
It supports dual serial interfaces: pin-selectable CMOS (1.8V–5V OVDD) and LVDS, with dedicated SCKO/SDO differential pairs. The device operates from split analog supplies (VCC = +7.5V to +38V, VEE = –16.5V to 0V), enabling true ±12.5V signal handling while maintaining 5V digital logic compatibility via independent VDD and OVDD rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no missing codes - ensures full dynamic range utilization without code gaps in precision measurement. |
| Sampling Rate | 800ksps maximum - supports real-time capture of fast transients in PLC I/O modules and test equipment. |
| INL (Max) | ±3LSB at ±10.24V range - enables accurate DC-coupled voltage monitoring with ≤0.0076% full-scale error. |
| SNR | 96.4dB typical - provides >15.7 effective number of bits (ENOB) for high-fidelity signal reconstruction. |
| Input Leakage | 500pA max at 85°C - preserves accuracy when interfacing with high-Z sources like strain gauges or piezoelectric sensors. |
| CMRR | 128dB typical - rejects common-mode noise in noisy industrial environments with minimal calibration burden. |
| Power Dissipation | 268mW typical at 800ksps - balances performance and thermal management in space-constrained embedded systems. |
Pinout & Package
48-lead (7mm × 7mm) plastic LQFP package (LX) with exposed pad for thermal enhancement. Pinout validated per Linear Technology (Analog Devices) datasheet 233318f, Figure "PIN CONFIGURATION".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ to IN7+ | Differential analog input positive | Accepts ±10.24V signals with 30VP-P common-mode range; buffered picoamp inputs reduce loading on source. |
| IN0– to IN7– | Differential analog input negative | Supports true bipolar (IN– = 0V), fully differential (IN– = –IN+), or arbitrary common-mode drive configurations. |
| VCC / VEE | Analog supply rails | Split supplies (VCC up to +38V, VEE down to –16.5V) enable wide input voltage compliance without external level shifters. |
| VDD / OVDD | Digital core / I/O supply | VDD = 4.75–5.25V powers internal logic; OVDD = 1.71–5.25V (CMOS) or 2.375–5.25V (LVDS) sets interface voltage level. |
| REFBUF / REFIN | Reference buffer output / input | REFBUF = 4.096V (typical); REFIN accepts 1.25–2.2V external reference or disables internal buffer when grounded. |
| CS / CNV / BUSY | Serial interface control | CS enables SPI/LVDS bus; CNV initiates conversion; BUSY indicates active conversion - supports deterministic timing control. |
| SCKI / SCKO / SDO | Serial clock input/output, data out | LVDS mode uses differential SCKI±, SCKO±, SDO±; CMOS mode uses single-ended pins - selectable via hardware strap. |
Key Features
| Feature | Design Value |
|---|---|
| SoftSpan™ programmable input ranges | Per-conversion selection among ±10.24V, 0–10.24V, ±5.12V, 0–5.12V - eliminates external gain-switching circuitry and simplifies multi-range system design. |
| Integrated reference and buffer | 4.096V buffered reference with 5ppm/°C tempco - removes need for external precision reference and driver amplifier, reducing BOM count and layout area. |
| Rail-to-rail input overdrive tolerance | Withstands ±(VCC–VEE) differential overvoltage without corruption - protects against transient surges and sensor disconnect events in harsh environments. |
| Programmable sequencer with no-latency control | Automatically cycles through channels and ranges without CPU intervention - reduces host processor load in high-channel-count data loggers. |
| 128dB CMRR and –125dB active crosstalk | Minimizes interference between channels during simultaneous sampling - critical for accurate multi-sensor correlation in vibration analysis systems. |
Applications
| Direct Sensor Measurement | Programmable Logic Controllers |
|---|---|
|
Use Scenario: Digitizing outputs from high-impedance sensors such as RTDs, thermocouples, and strain gauges in factory-floor instrumentation. IC Role / Device Role / Timing Role: Front-end 18-bit SAR ADC with buffered inputs and programmable SoftSpan ranges - performs precision DC-coupled acquisition without external signal conditioning. Use Value: 500pA input leakage and 128dB CMRR maintain accuracy despite long sensor leads and EMI exposure in unshielded industrial enclosures. |
Use Scenario: Analog input module in modular PLC chassis acquiring voltage/current signals from field transmitters and actuators. IC Role / Device Role / Timing Role: 8-channel multiplexed ADC with 800ksps aggregate throughput - enables sub-millisecond scan times across multiple I/O points. Use Value: ±10.24V input range and rail-to-rail overdrive tolerance eliminate external protection clamps and simplify interface to 4–20mA loop receivers. |
| Industrial Process Control | Test and Measurement |
|
Use Scenario: Closed-loop control system monitoring reactor temperature, pressure, and flow in chemical processing plants. IC Role / Device Role / Timing Role: High-accuracy ADC with ±3LSB INL and 96.4dB SNR - provides stable feedback data for PID controllers operating under thermal drift. Use Value: Integrated 4.096V reference buffer with 5ppm/°C drift ensures long-term calibration stability without periodic recalibration. |
Use Scenario: Modular digitizer card in automated test equipment capturing waveforms from power electronics, motor drives, and RF subsystems. IC Role / Device Role / Timing Role: Dual-interface (SPI/LVDS) 18-bit ADC supporting both embedded controller integration and high-speed FPGA-based acquisition. Use Value: 420ns step response and 3psRMS aperture jitter enable precise time-domain analysis of fast switching edges and transient anomalies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 18-bit, 8-channel, ±10V range, but requires external reference and lacks SoftSpan™ range flexibility; 250ksps max rate. | Lower throughput and fixed input range limit use in dynamic multi-range systems like adaptive sensor arrays. | Select when cost sensitivity outweighs need for programmable ranges and higher speed; verify external reference stability meets system ENOB targets. |
| ADS8688 | 16-bit, 8-channel, ±10.24V range with integrated reference, but only 500ksps max and 92dB SNR. | Lower resolution and SNR restrict use in applications demanding >15.5 ENOB, such as high-fidelity audio test or metrology-grade calibration. | Choose for lower-power, lower-cost implementations where 16-bit resolution suffices and thermal budget is constrained. |
Compared with AD7606C-18 and ADS8688, the LTC2333CLX-18#PBF uniquely combines 800ksps throughput, 18-bit no-missing-codes performance, on-the-fly SoftSpan™ range reconfiguration, and integrated reference buffer - making it optimal for next-generation industrial DAQ systems requiring both speed and configurability.
Availability
LTC2333CLX-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, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2333CLX-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. is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2333 family was designed specifically for high-accuracy, high-channel-count data acquisition in electrically noisy, wide-input-voltage industrial environments - emphasizing robustness, integrated signal conditioning, and flexible interface options.
FAQ
What is the operating temperature range for the LTC2333CLX-18#PBF?
The LTC2333CLX-18#PBF is rated for 0°C to 70°C operation, as indicated by the 'C' grade suffix in its part number. This commercial-grade specification aligns with applications in controlled-environment industrial electronics, HVAC controllers, and benchtop test instruments where ambient thermal stress is moderate. The device maintains full performance across this range, including ±3LSB INL and 96.4dB SNR.
Does the LTC2333CLX-18#PBF require an external reference voltage?
No, the LTC2333CLX-18#PBF includes an integrated 4.096V reference buffer (REFBUF) and internal reference (REFIN = 2.048V). When used in default configuration, it operates autonomously without external references. However, REFIN can accept an external 1.25–2.2V reference if system-level calibration or improved temperature stability is required - in which case the internal buffer must be disabled by grounding REFIN.
How does the SoftSpan™ feature work on the LTC2333CLX-18#PBF?
The SoftSpan™ feature on the LTC2333CLX-18#PBF allows per-conversion programming of eight distinct input ranges - including ±10.24V, 0–10.24V, ±5.12V, and 0–5.12V - via SPI register writes. Each channel can be independently configured, enabling mixed-range acquisition (e.g., one channel measuring ±10V sensor output while another reads 0–5V thermistor voltage) without hardware changes or external gain switching.
What are the power supply requirements for the LTC2333CLX-18#PBF?
The LTC2333CLX-18#PBF requires three independent supplies: analog VCC (+7.5V to +38V) and VEE (–16.5V to 0V) for wide-input-range operation; digital VDD (4.75V–5.25V) for core logic; and OVDD (1.71V–5.25V for CMOS, 2.375V–5.25V for LVDS) for serial interface levels. This decoupled architecture isolates noise-sensitive analog sections from digital switching transients.
Can the LTC2333CLX-18#PBF interface directly with an FPGA using LVDS?
Yes, the LTC2333CLX-18#PBF supports native LVDS serial communication with differential SCKI±, SCKO±, and SDO± pins. When configured for LVDS mode (via hardware strap), it delivers 350mV differential swing into 100Ω termination with 1.2V common-mode voltage - fully compatible with standard FPGA LVDS I/O banks. Timing parameters such as tSCKI = 4ns minimum ensure reliable 250MHz clock rates.
LTC2333CLX-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:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2333CLX-18#PBF FAQ
1.How can I place an order for LTC2333CLX-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2333CLX-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 LTC2333CLX-18#PBF reliable?
The price and inventory of LTC2333CLX-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 LTC2333CLX-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2333CLX-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2333CLX-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2333CLX-18#PBF?
LTC2333CLX-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2333CLX-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 LTC2333CLX-18#PBF?
For technical support, including LTC2333CLX-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2333CLX-18#PBF requirements.
6.How does Aetrix verify that LTC2333CLX-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2333CLX-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 LTC2333CLX-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2333CLX-18#PBF?
All LTC2333CLX-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2333CLX-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 LTC2333CLX-18#PBF part is unused and in its original packaging.
Return procedure for LTC2333CLX-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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