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Analog Devices Inc. LTC2335HLX-18#PBF
- Part No.:
- LTC2335HLX-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2335HLX-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:163
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Product details
Overview
LTC2335HLX-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1 Msps, 8-channel differential successive approximation register (SAR) ADC with SoftSpan™ configurable input ranges (±10.24V, 0V–10.24V, ±5.12V, 0V–5.12V), 118 dB common-mode rejection ratio, and integrated 4.096 V reference buffer. It operates across –40°C to +125°C and targets high-voltage industrial data acquisition systems requiring wide dynamic range and rail-to-rail input overdrive tolerance.
For engineers reviewing the LTC2335HLX-18#PBF datasheet, LTC2335HLX-18#PBF pinout, LTC2335HLX-18#PBF application, or LTC2335HLX-18#PBF equivalent, key selection considerations include guaranteed no-missing-codes at 18 bits, ±3 LSB INL (max, ±10.24V range), 96.7 dB SNR (typ), dual CMOS/LVDS serial interface support, and programmable sequencer operation without latency.
Technical Context
The LTC2335HLX-18#PBF implements a true SAR architecture with no pipeline delay and no cycle latency, enabling deterministic timing for real-time control loops. Its analog front-end features differential inputs with a wide common-mode range (VEE to VCC – 4 V) and rail-to-rail overdrive tolerance, allowing direct digitization of high-voltage sensor outputs without external level-shifting circuitry.
SoftSpan™ configuration is performed per-conversion via SPI or LVDS commands, supporting eight distinct input ranges-including ±12.5 V and 0 V–12.5 V-while maintaining full 18-bit resolution and monotonicity. The integrated reference buffer delivers 4.096 V with 5 ppm/°C max temperature coefficient and supports external overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit, guaranteed no missing codes - ensures unambiguous digital representation across full scale in precision measurement. |
| Sampling Rate | 1 Msps maximum - supports real-time capture of signals up to ~400 kHz Nyquist bandwidth. |
| INL (Max) | ±3 LSB at ±10.24 V range - translates to <±0.0076% full-scale error, critical for calibration-sensitive instrumentation. |
| SNR (Typ) | 96.7 dB at fIN = 2 kHz - enables >16 ENOB for high-fidelity signal reconstruction in test & measurement. |
| CMRR (Typ) | 118 dB - rejects common-mode noise from long cables or noisy industrial environments without external filtering. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, power line monitoring, and harsh-environment industrial use. |
| Power Dissipation | 180 mW typical (acquisition mode) - balances performance and thermal management in compact enclosures. |
Pinout & Package
48-lead (7 mm × 7 mm) plastic LQFP package (LX), RoHS-compliant, with exposed pad for thermal enhancement. Pin assignments are validated per Linear Technology's official pin configuration diagram (LTC2335-18 datasheet Rev. F, p.2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ to IN7+, IN0− to IN7− | Differential analog inputs (8 channels) | Accepts true bipolar, unipolar, or arbitrary common-mode drive; supports ±10.24 V full-scale with VEE = –15 V, VCC = +15 V. |
| VCC / VEE | High-voltage analog supplies | Independent ±16.5 V capable rails (VCC ≥ 0 V, VEE ≤ 0 V); enable direct interfacing with ±12 V or ±15 V sensor outputs. |
| REFIN / REFBUF | Internal reference output / buffered reference output | REFIN = 2.048 V bandgap; REFBUF = 4.096 V (2×), externally overdrivable to 5 V for extended range flexibility. |
| CS / CNV / BUSY / SDO / SCKO / SCKI / SDI | Serial interface control and data I/O | Supports pin-selectable CMOS (1.8 V–5 V) or LVDS modes; no protocol translation required between interface types. |
| PD | Power-down control | Reduces current to <1 μA (H-grade); enables low-power sleep states in battery-backed or energy-conscious systems. |
Key Features
| Feature | Design Value |
|---|---|
| Per-conversion SoftSpan™ range selection | Enables mixed-range acquisition (e.g., ±10.24 V on CH0, 0–5.12 V on CH1) within one sequence-no hardware reconfiguration needed. |
| Programmable sequencer with no-latency control | Automatically cycles through preconfigured channel/range combinations; eliminates software overhead in high-throughput scanning. |
| Rail-to-rail input overdrive tolerance | Withstands input transients beyond VEE and VCC by ±0.3 V without latch-up-reduces need for external clamping diodes. |
| 125 dB active crosstalk (typ) | Minimizes inter-channel interference during simultaneous multi-channel sampling-critical for phase-coherent power monitoring. |
| Integrated reference and buffer (4.096 V) | Eliminates external reference IC and op-amp buffer; reduces BOM count, layout area, and drift-induced system errors. |
Applications
| Power Line Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Real-time acquisition of AC voltage/current waveforms (50/60 Hz ± harmonics) across multiple phases in switchgear or smart meters. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing isolated ±10.24 V sensor outputs with synchronized sampling across 8 channels. Use Value: 118 dB CMRR rejects common-mode noise from switching converters; ±3 LSB INL ensures accurate RMS and THD calculations. |
Use Scenario: Closed-loop feedback acquisition from pressure, temperature, and flow sensors in PLC I/O modules operating at 125°C ambient. IC Role / Device Role / Timing Role: High-accuracy, high-temperature ADC interfacing with 4–20 mA transmitters and RTD conditioners. Use Value: Guaranteed operation to +125°C and integrated 4.096 V reference eliminate external temp-compensated references and reduce calibration drift. |
| Test & Measurement Equipment | Programmable Logic Controllers |
|
Use Scenario: Digitizing fast transient signals (e.g., surge testing, motor startup) in portable oscilloscopes and data loggers. IC Role / Device Role / Timing Role: 1 Msps SAR ADC capturing single-shot events with deterministic 500 ns conversion time and zero pipeline delay. Use Value: 96.7 dB SNR and 101 dB SFDR preserve signal fidelity; LVDS interface suppresses EMI in dense PCB layouts. |
Use Scenario: Modular analog input cards for DIN-rail mounted PLCs requiring field-replaceable, high-reliability ADCs. IC Role / Device Role / Timing Role: Industrial-grade ADC with robust ESD protection, wide supply range (VCC/VEE), and AEC-Q100-aligned reliability. Use Value: 48-lead LQFP package supports automated assembly; H-grade qualification ensures longevity in continuous 24/7 operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 18-bit, 1 Msps, 8-channel, but uses internal oscillator and fixed ±10 V range; no SoftSpan™ configurability; requires external reference for full accuracy. | Best suited for cost-sensitive, fixed-range applications where per-conversion range flexibility is unnecessary. | Select AD7606C-18 when board space is constrained and only ±10 V inputs are used-avoids SoftSpan™ configuration overhead. |
| ADS8688IPWR | 18-bit, 1 Msps, 8-channel, with integrated PGA and ±12.288 V range; uses SPI-only CMOS interface; no LVDS option; lower CMRR (100 dB typ). | Preferred for systems needing on-chip gain scaling before digitization, especially with low-level sensor outputs (<1 V). | Choose ADS8688IPWR when input signal conditioning (gain/offset) must be integrated-reduces external op-amp count. |
Compared with AD7606C-18 and ADS8688IPWR, the LTC2335HLX-18#PBF uniquely combines per-conversion SoftSpan™ range selection, 118 dB CMRR, and dual CMOS/LVDS interface in a single H-grade device-enabling flexible, noise-immune, high-temperature acquisition without design compromises.
Availability
LTC2335HLX-18#PBF is available at Aetrix Electronics and suitable for power line monitoring, industrial process control, and test & measurement applications requiring stable component supply, extended temperature operation, and long-term obsolescence mitigation.
Supply support for LTC2335HLX-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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC2335HLX-18#PBF belongs to Linear's high-precision, high-voltage SAR ADC family, designed specifically for industrial and instrumentation applications demanding wide input range flexibility, exceptional noise immunity, and extended temperature reliability.
FAQ
What is the maximum sampling rate supported by the LTC2335HLX-18#PBF?
The LTC2335HLX-18#PBF supports a maximum sampling rate of 1 Msps, with a minimum conversion time of 450 ns and guaranteed timing across its full –40°C to +125°C operating range. This enables real-time capture of signals with up to ~400 kHz bandwidth while maintaining 18-bit resolution and no missing codes.
Does the LTC2335HLX-18#PBF require an external reference voltage?
No, the LTC2335HLX-18#PBF integrates a precision 2.048 V bandgap reference (REFIN) and a buffered 4.096 V output (REFBUF). REFBUF can be overdriven externally up to 5 V for extended SoftSpan™ ranges, eliminating the need for external reference ICs in most applications.
How does the SoftSpan™ feature work on the LTC2335HLX-18#PBF?
The SoftSpan™ feature on the LTC2335HLX-18#PBF allows per-conversion selection of eight input ranges-including ±10.24 V, 0–10.24 V, ±5.12 V, and 0–5.12 V-via SPI or LVDS command. This enables mixed-range acquisition across channels without hardware changes or recalibration delays.
What is the operating temperature range of the LTC2335HLX-18#PBF?
The LTC2335HLX-18#PBF is rated for operation from –40°C to +125°C (H-grade), with all key specifications-including INL, SNR, and CMRR-guaranteed across this full range. This makes it suitable for under-hood automotive, power converter monitoring, and industrial control environments.
Can the LTC2335HLX-18#PBF interface directly with LVDS logic?
Yes, the LTC2335HLX-18#PBF supports pin-selectable LVDS serial I/O (SCKI, SDO, SDI) with differential input voltage of 200–600 mV, 100 Ω termination, and common-mode range of 0.3–2.2 V. No level-shifting circuitry is required when interfacing with standard LVDS FPGA or ASIC receivers.
LTC2335HLX-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):
- 1M
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial, SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2335HLX-18#PBF FAQ
1.How can I place an order for LTC2335HLX-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2335HLX-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 LTC2335HLX-18#PBF reliable?
The price and inventory of LTC2335HLX-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 LTC2335HLX-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2335HLX-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2335HLX-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2335HLX-18#PBF?
LTC2335HLX-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2335HLX-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 LTC2335HLX-18#PBF?
For technical support, including LTC2335HLX-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2335HLX-18#PBF requirements.
6.How does Aetrix verify that LTC2335HLX-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2335HLX-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 LTC2335HLX-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2335HLX-18#PBF?
All LTC2335HLX-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2335HLX-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 LTC2335HLX-18#PBF part is unused and in its original packaging.
Return procedure for LTC2335HLX-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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