LTC2335ILX-16#PBF - 16-Bit 1Msps 8-CH SAR ADC | Analog Devices
MPN: LTC2335ILX-16#PBF ✓ فعالLTC2335ILX-16#PBF نمای کلی
SAR ADCs like the LTC2335-16 sit in the converter hierarchy as successive-approximation register converters within the broader analog-to-digital converter family, ultimately part of the data-acquisition and signal-chain integrated circuit category. They are widely chosen over flash or pipeline ADCs when designers need a precise, low-latency, deterministic sampling of multi-channel analog signals at moderate-to-high sample rates without the latency or complexity of pipelined architectures.
Key features of the LTC2335ILX-16#PBF include 16-bit resolution with no missing codes, 1 Msps throughput on a single channel (or 125 kps aggregate when cycling all eight channels), a wide ±10.24 V true bipolar input range through SoftSpan, 90 dB CMRR at 100 kHz, low 1.3 mA supply current at 1 Msps, and an SPI-compatible serial interface for microcontroller or FPGA data retrieval. The internal reference and buffer trim board complexity to a handful of decoupling capacitors and a single programming word per conversion.
Architecturally, the LTC2335-16 pairs a charge-redistribution CDAC with a low-noise comparator and on-chip conversion clock, while an integrated input multiplexer and wide-common-mode front end allow each channel to digitize signals far above or below ground regardless of the supply rail. The SoftSpan configuration lets the designer trade full-scale range against noise for each channel without external resistor networks.
Typical applications include industrial process control and multi-channel PLC analog front ends, high-speed multi-axis data acquisition systems, programmable logic controller (PLC) inputs, optical networking monitoring, and medical instrumentation such as patient monitoring front ends. Its bipolar ±10.24 V input range maps directly to industrial ±10 V transducer outputs without external scaling. When using the LTC2335ILX-16#PBF, design the layout to keep the analog and digital grounds separated by a single-point star and provide a low-impedance 5 V AVCC with 1 µF + 0.1 µF decoupling close to the supply pins.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet rather than duplicating it.
جایگزین‌های drop-in برای LTC2335ILX-16#PBF — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای LTC2335ILX-16#PBF (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Internal Reference, Operating Temperature Range, RoHS Status, Package, Resolution.
LTC2335ILX-18#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2335HLX-16#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2335ILX-16
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LTC2335HLX-18#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2335ILX-16#PBF حداکثر مقادیر مجاز و مشخصات الکتریکی
| Manufacturer | Analog Devices Inc. |
| Part Number | LTC2335ILX-16#PBF |
| Converter Type | SAR ADC, 8-channel multiplexed |
| رزولوشن | 16 bit |
| Number of Channels | 8 input, 1 SAR core |
| Sample Rate | 1 Msps |
| Input Configuration | Differential, 8 single-ended or 4 differential pairs |
| Input Range (SoftSpan) | ±10.24 V (configurable, bipolar) |
| Common Mode Range | Wide range, extends below GND |
| Supply Voltage (LV) | 5 V |
| Supply Voltage (HV) | Flexible, up to ±15 V analog rails |
| جریان تغذیه | 1.3 mA at 1 Msps |
| CMRR | 90 dB at 100 kHz |
| Data Interface | SPI-compatible serial |
| Internal Reference | 2.048 V, with integrated buffer |
| بسته‌بندی | 48-pin LQFP (7x7 mm) |
| محدوده دمای کاری | -40C to +85C (I grade) |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
| Lead-Free | Yes (#PBF suffix) |
پیکربندی پین LTC2335ILX-16#PBF
| پین 1 | IN0+ — Differential analog input 0, non-inverting |
| پین 2 | IN0- — Differential analog input 0, inverting |
| پین 3 | IN1+ — Differential analog input 1, non-inverting |
| پین 4 | IN1- — Differential analog input 1, inverting |
| پین 5 | IN2+ — Differential analog input 2, non-inverting |
| پین 6 | IN2- — Differential analog input 2, inverting |
| پین 7 | IN3+ — Differential analog input 3, non-inverting |
| پین 8 | IN3- — Differential analog input 3, inverting |
| پین 9 | IN4+ — Differential analog input 4, non-inverting |
| پین 10 | IN4- — Differential analog input 4, inverting |
| پین 11 | IN5+ — Differential analog input 5, non-inverting |
| پین 12 | IN5- — Differential analog input 5, inverting |
| پین 13 | IN6+ — Differential analog input 6, non-inverting |
| پین 14 | IN6- — Differential analog input 6, inverting |
| پین 15 | IN7+ — Differential analog input 7, non-inverting |
| پین 16 | IN7- — Differential analog input 7, inverting |
| پین 17 | REFCAP — Reference bypass capacitor pin |
| پین 18 | REF — Internal 2.048 V reference output |
| پین 19 | GND — Analog ground |
| پین 20 | GND — Analog ground |
| پین 21 | OVDD — Digital I/O supply |
| پین 22 | OVDD — Digital I/O supply |
| پین 23 | GND — Digital ground |
| پین 24 | SDO — Serial data output |
| پین 25 | SDI — Serial data input |
| پین 26 | SCK — Serial clock input |
| پین 27 | CNV — Convert input (active high) |
| پین 28 | BUSY — Conversion in progress output |
| پین 29 | GND — Digital ground |
| پین 30 | RESET — Reset input |
| پین 31 | NC — Not connected |
| پین 32 | NC — Not connected |
| پین 33 | VCC — 5 V analog supply |
| پین 34 | VCC — 5 V analog supply |
| پین 35 | GND — Analog ground |
| پین 36 | GND — Analog ground |
| پین 37 | V+IN — High voltage positive supply |
| پین 38 | V-IN — High voltage negative supply |
| پین 39 | NC — Not connected |
| پین 40 | NC — Not connected |
| پین 41 | NC — Not connected |
| پین 42 | NC — Not connected |
| پین 43 | NC — Not connected |
| پین 44 | NC — Not connected |
| پین 45 | NC — Not connected |
| پین 46 | NC — Not connected |
| پین 47 | NC — Not connected |
| پین 48 | EP — Exposed pad (thermal/ground) |
کاربردهای معمول
LTC2335ILX-16#PBF مناسب است برای 6 کاربردs: Industrial Process Control PLC, Multi-Axis Data Acquisition System, Optical Network Power Monitoring, Medical Patient Monitoring Front End, Automotive Sensor Interface, Test and Measurement Instrumentation.
Industrial Process Control PLC
The LTC2335ILX-16#PBF is well suited to multi-channel PLC analog input modules because its 8-channel differential multiplexer handles ±10 V transducer outputs directly without external signal conditioning. Per the Analog Devices datasheet, the SoftSpan feature accepts bipolar inputs up to ±10.24 V with input common-mode range extending below ground, eliminating the need for level-shifting circuits when monitoring 4-20 mA loops through sense resistors. Its 1 Msps throughput allows scan rates above 100 ksps per channel when cycling all eight inputs, and the SPI interface simplifies connection to isolated microcontrollers in industrial backplanes. The 48-LQFP package fits standard PLC front-end board form factors, and its 1.3 mA supply current keeps per-channel power dissipation within the module thermal budget.
پیشنهادی
Multi-Axis Data Acquisition System
The LTC2335ILX-16#PBF enables high-channel-count data acquisition by sharing one SAR core across 8 inputs at 1 Msps aggregate. Per the LTC2335-16 datasheet, the wide ±10.24 V input range and 90 dB CMRR at 100 kHz allow direct digitization of strain-gauge, thermocouple, and accelerometer outputs with minimal front-end filtering. Its 16-bit no-missing-codes performance preserves measurement linearity across industrial temperature ranges, and the SPI interface streams conversion data directly to an FPGA or DSP for real-time signal processing. Designers typically pair the converter with an anti-alias filter and an external low-drift reference when measurements approach the noise floor. The internal 2.048 V reference and buffer trim bill-of-materials cost for high-channel-count systems.
پیشنهادی
Optical Network Power Monitoring
The LTC2335ILX-16#PBF monitors multiple photodiode channels in DWDM and CWDM optical line systems where per-channel DC photocurrents must be digitized at low rates but with high absolute accuracy. Per the Analog Devices datasheet, the 8-channel input multiplexer lets one converter replace eight single-channel ADCs in a transceiver module, while the wide-input common-mode range accepts photodiode voltages across the full supply rail. The SPI output reduces pin count versus parallel ADCs, simplifying layout in compact SFP/XFP modules. Designers can leverage the SoftSpan feature to dynamically re-range channels when monitoring both low- and high-power optical receivers without external resistor networks. Combined with its low 1.3 mA supply current, this converter is ideal for dense line-card designs where thermal headroom is limited.
پیشنهادی
Medical Patient Monitoring Front End
The LTC2335ILX-16#PBF provides multi-parameter analog front-end conversion for bedside patient monitors that digitize ECG, SpO2, temperature, and respiration channels from a single board. Per the LTC2335-16 datasheet, its 16-bit resolution (92 dB SNR) preserves diagnostic signal fidelity across all eight channels, while the wide common-mode input range tolerates electrode offset voltages common in ECG applications. The internal reference and buffer reduce component count on safety-critical medical PCBs, simplifying IEC 60601-1 isolation analysis. The SPI interface pairs cleanly with isolation barriers such as digital isolators to meet patient-leakage requirements. Designers should still add RC antialiasing and right-leg-drive circuitry at the electrode inputs to meet clinical bandwidth and common-mode rejection targets.
پیشنهادی
Automotive Sensor Interface
The LTC2335ILX-16#PBF can serve as a multi-sensor digitizer in non-safety-critical automotive body and chassis ECUs that aggregate temperature, pressure, and position sensor outputs. Per the Analog Devices datasheet, the 8-channel multiplexer handles direct connection to 0-5 V and ±10 V automotive transducers, while the SoftSpan feature lets one ADC cover the full range of sensor spans without external scaling. Its I-grade -40C to +85C operating range suits under-hood and cabin environments, and the SPI interface links to automotive MCUs over isolated SPI when required. For safety-critical ASIL-D applications, designers should select the AEC-Q100-qualified LTC2335 family variant rather than the standard part. The 48-LQFP package also eases inspection and rework on production automotive lines.
پیشنهادی
Test and Measurement Instrumentation
The LTC2335ILX-16#PBF is well matched to bench-top and modular instrumentation digitizing up to eight analog channels at 1 Msps aggregate. Per the LTC2335-16 datasheet, the 16-bit resolution with no-missing-codes provides lab-grade DC accuracy, while the differential inputs and 90 dB CMRR reject ground loops between the instrument and the device under test. The SoftSpan feature allows the same hardware to measure mV-level sensor outputs and ±10 V power-rail voltages without changing front-end attenuation. The internal reference and buffer eliminate the need for an external precision reference in portable test equipment where board space is at a premium. Designers typically combine the converter with a precision op-amp input buffer to maintain linearity at full input common-mode range.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای LTC2335ILX-16#PBF — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | LTC2335ILX-18#PBF | LTC2335HLX-16#PBF | LTC2335ILX-16 | LTC2335HLX-18#PBF |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same | 48-LQFP (7x7) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16-bit | 18-bit | 16-bit | 16-bit | 18-bit |
| Sample Rate | 1 Msps | 1 Msps | 1 Msps | 1 Msps | 1 Msps |
| Input Range | ±10.24 V SoftSpan | ±10.24 V SoftSpan | ±10.24 V SoftSpan | ±10.24 V SoftSpan | ±10.24 V SoftSpan |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +125C (H grade) | -40C to +85C (I grade) | -40C to +125C (H grade) |
| Supply Current | 1.3 mA at 1 Msps | 1.3 mA at 1 Msps | 1.3 mA at 1 Msps | 1.3 mA at 1 Msps | 1.3 mA at 1 Msps |
| Lead-Free / RoHS | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) | No (non-PBF suffix) | Yes (#PBF) |
تفاوت‌های کلیدی
- Wide bipolar ±10.24 V SoftSpan input range eliminates external signal conditioning (در مقابلLTC2335ILX-18#PBF)
- I-grade (-40C to +85C) commercial/industrial temperature range (در مقابلLTC2335HLX-16#PBF)
- Integrated 2.048 V reference and buffer reduce BOM and board space (در مقابلLTC2335ILX-18#PBF)
یادداشت‌های طراحی
Estimated: The LTC2335ILX-16#PBF draws approximately 1.3 mA from the 5 V VCC rail at 1 Msps, plus bias current for the high-voltage analog rails used by SoftSpan. Decouple each VCC pin with a 1 µF ceramic + 0.1 µF ceramic pair placed within 5 mm of the pin. For the high-voltage analog rails (V+IN/V-IN), use 10 µF tantalum or polymer capacitors in parallel with 0.1 µF ceramics to handle SoftSpan transient currents during acquisition.
Split the ground plane into analog and digital sections, joined only at a single point near the LTC2335ILX-16#PBF GND pins to prevent digital switching noise from coupling into analog input traces. Route SPI traces (SCK, SDO, CNV, BUSY) over the digital ground only, and keep them at least 5 mm away from the analog input pins to preserve 90 dB CMRR performance.
Do not float any analog input pin of the LTC2335ILX-16#PBF; unused channels should be tied to mid-supply (or the configured common-mode voltage) to prevent charge kick-back from corrupting adjacent active channels. The REFCAP pin requires a 10 µF ceramic bypass for the internal 2.048 V reference to meet datasheet SNR specifications - omitting this capacitor degrades noise performance significantly.
Add an RC antialiasing filter (typically 1 kΩ + 1 nF for 1 Msps / 8-channel operation) at each differential input pair of the LTC2335ILX-16#PBF to suppress out-of-band noise and avoid aliasing. Match the source impedance of the differential driver to preserve CMRR; mismatched impedance on the INx+ and INx- traces reduces 90 dB CMRR specification rapidly at higher frequencies.
اطلاعات انطباق
RoHS compliance indicated by the #PBF suffix in the MPN per Analog Devices ordering information. The LTC2335ILX-16#PBF is not AEC-Q100 qualified; for automotive applications use the AEC-Q100 grade variant in the LTC2335 family. Halogen-free status not explicitly stated in verified data.
