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Analog Devices Inc. LTC2372IUH-18#PBF
- Part No.:
- LTC2372IUH-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2372IUH-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
LTC2372IUH-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 500ksps, 8-channel successive approximation register (SAR) analog-to-digital converter with fully differential ±4.096V input range, 100dB typical SNR, ±2.75LSB max INL, and integrated 2.048V temperature-compensated reference. It operates from a single 5V supply and supports 1.8V–5V I/O logic, enabling high-precision data acquisition in industrial process control systems.
For engineers reviewing the LTC2372IUH-18#PBF datasheet, LTC2372IUH-18#PBF pinout, LTC2372IUH-18#PBF application, or LTC2372IUH-18#PBF equivalent, key selection considerations include guaranteed operation to 85°C, programmable 16-deep sequencer, no pipeline delay, 27mW typical power dissipation at full rate, and support for pseudo-differential unipolar/bipolar ranges.
Technical Context
The LTC2372IUH-18#PBF implements a low-crosstalk 8-channel multiplexer with configurable input modes-fully differential, pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V)-all sharing a common 2.048V internal reference buffered to 4.096V. Its SAR architecture delivers true 18-bit resolution with no missing codes and zero cycle latency.
Timing is governed by an internal oscillator, eliminating external clock dependencies; conversion time is fixed at 1.5µs max, with 2µs minimum inter-conversion period. The SPI-compatible serial interface supports daisy-chaining and features BUSY, RDL, SDO, SDI, and SCK pins, with programmable digital gain compression and sleep mode reducing current to 300µW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes - ensures full dynamic range utilization without code gaps |
| Sampling Rate | 500ksps maximum - supports real-time capture of signals up to ~22MHz bandwidth |
| SNR | 100dB typical (fully differential) - enables >16.6 effective bits in precision measurement |
| INL | ±2.75LSB maximum - guarantees monotonicity and linearity critical for closed-loop control |
| Reference | Onboard 2.048V ±20ppm/°C ref with buffer - eliminates external reference design and calibration |
| Power Dissipation | 27mW at 500ksps, 300µW in sleep - scales with throughput for energy-efficient embedded DAQ |
| Temperature Range | –40°C to +85°C - qualified for industrial environments without derating |
Pinout & Package
32-lead 5mm × 5mm plastic QFN package (UH) with exposed pad soldered to PCB ground. Pin 33 is the exposed thermal pad, electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight single-ended inputs selectable via internal MUX; support fully differential or pseudo-differential configurations |
| COM | Common-mode reference | Return path for pseudo-differential inputs; sets VCM for bipolar/unipolar ranges |
| ADCIN+, ADCIN– | Dedicated differential input pair | Direct connection for highest-performance fully differential acquisition, bypassing MUX |
| MUXOUT+, MUXOUT– | Multiplexer output pair | Output of selected channel before ADC core; useful for signal monitoring or external conditioning |
| CNV | Conversion start trigger | Rising edge initiates sampling; timing-critical for synchronized multi-device systems |
| BUSY | Conversion status indicator | Active-high open-drain signal indicating ongoing conversion; used for handshaking |
| SDO, SDI, SCK, RDL | SPI serial interface | Supports 1.8V–5V logic; RDL enables tri-state control of SDO for daisy-chain configurations |
| REFBUF, REFIN | Reference buffer and input | REFBUF outputs 4.096V; REFIN accepts 1.25V–2.4V for external reference override |
| VDD, OVDD, GND | Power supplies | VDD = 5V analog supply; OVDD = 1.71V–5.25V I/O supply; multiple GND pins minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-deep sequencer | Enables automatic round-robin or custom channel scan without host CPU intervention |
| Selectable digital gain compression | Adjusts output scaling to maximize dynamic range usage for undersized input signals |
| No pipeline delay / zero latency | Delivers first valid sample immediately after CNV edge - essential for real-time feedback loops |
| Internal reference buffer | Drives external circuitry (e.g., driver amps) while maintaining ADC accuracy and stability |
| Auto-nap between conversions | Reduces average power proportionally to sampling rate - extends battery life in portable instruments |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensor outputs in PLC-based control cabinets with tight EMC constraints. IC Role / Device Role / Timing Role: Central 18-bit ADC capturing 8 analog sensor channels at 500ksps with synchronized sampling and low crosstalk. Use Value: ±2.75LSB INL and 100dB SNR ensure accurate PID loop inputs across –40°C to 85°C ambient. | Use Scenario: Digitizing wideband sensor outputs (e.g., vibration, acoustic emission) in portable test equipment. IC Role / Device Role / Timing Role: High-fidelity front-end ADC with no pipeline latency, supporting real-time FFT analysis on embedded processors. Use Value: 22MHz –3dB input bandwidth and aperture jitter of 4ps RMS preserve signal integrity at Nyquist. |
| ATE Test Systems | Portable Instrumentation |
Use Scenario: Precision DC parametric testing of ICs and passive components requiring traceable voltage/current measurements. IC Role / Device Role / Timing Role: Metrology-grade ADC with onboard 2.048V reference and <±2.75LSB INL for absolute accuracy. Use Value: Integrated reference eliminates external drift sources; 95–100dB SNR enables sub-100µV resolution at full scale. | Use Scenario: Battery-powered handheld multimeters and oscilloscope probes needing low power and high DC accuracy. IC Role / Device Role / Timing Role: Low-power 18-bit converter operating in nap/sleep modes between manual trigger events. Use Value: 300µW sleep current and 27mW active power allow >10-hour runtime on coin-cell batteries. |
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 | 8-channel, 18-bit, 1MSPS; uses external reference; requires ±5V analog supply | Better speed but higher power (65mW); less integrated (no internal ref/buffer) | Choose when >500ksps throughput is required and external reference is acceptable |
| ADS8688IPWR | 8-channel, 16-bit, 500ksps; integrated 4.096V ref; SPI interface; 1.8V–3.3V I/O only | Lower resolution (16-bit), smaller temp range (–40°C to 125°C), no pseudo-differential bipolar mode | Choose for cost-sensitive designs where 16-bit resolution suffices and lower voltage I/O is preferred |
Compared with AD7606C-18 and ADS8688IPWR, the LTC2372IUH-18#PBF uniquely combines 18-bit resolution, integrated 2.048V reference with buffer, fully differential ±4.096V input, and guaranteed 500ksps operation over –40°C to 85°C - making it optimal for compact, self-contained industrial DAQ modules requiring minimal external components.
Availability
LTC2372IUH-18#PBF is available at Aetrix Electronics and suitable for industrial process control, high-speed data acquisition, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed performance across extended temperature ranges.
Supply support for LTC2372IUH-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.
The LTC2372IUH-18#PBF belongs to ADI's precision SAR ADC product line, designed specifically for high-accuracy, multi-channel data acquisition in space-constrained, thermally demanding industrial and test equipment.
FAQ
What is the maximum sampling rate of the LTC2372IUH-18#PBF?
The LTC2372IUH-18#PBF achieves a maximum sampling rate of 500ksps across all input configurations and temperature ranges. This rate is supported continuously without derating, with a fixed 1.5µs conversion time and 2µs minimum inter-conversion period, enabling deterministic timing for real-time control applications.
Does the LTC2372IUH-18#PBF require an external reference?
No, the LTC2372IUH-18#PBF includes an onboard 2.048V temperature-compensated reference with ±20ppm/°C drift and a dedicated reference buffer that outputs 4.096V. An external reference may be applied via REFIN (1.25V–2.4V), but it is not required - the internal solution meets full 18-bit linearity and SNR specifications.
What input ranges does the LTC2372IUH-18#PBF support?
The LTC2372IUH-18#PBF supports three configurable input ranges: fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V). All ranges use the same internal reference and maintain ±2.75LSB max INL and ≥95dB typical SNR, with channel-to-channel crosstalk below –107dB.
How does the programmable sequencer in the LTC2372IUH-18#PBF operate?
The LTC2372IUH-18#PBF features a 16-deep programmable sequencer that autonomously cycles through up to 16 user-defined channel configurations (e.g., CH0→CH3→CH7→CH0) without host processor involvement. Sequencing is controlled via SPI writes to configuration registers and supports both continuous and one-shot modes, reducing firmware overhead in multi-channel systems.
What power-saving modes does the LTC2372IUH-18#PBF offer?
The LTC2372IUH-18#PBF offers two low-power states: Nap Mode (1.25mA, ~6.25mW) automatically engaged between conversions at full rate, and Sleep Mode (300µW total) activated via SPI command. Sleep Mode disables the reference buffer and internal oscillator, allowing rapid wake-up (<200ms REFBUF settling) when activity resumes.
LTC2372IUH-18#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 8
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2372IUH-18#PBF FAQ
1.How can I place an order for LTC2372IUH-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2372IUH-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 LTC2372IUH-18#PBF reliable?
The price and inventory of LTC2372IUH-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 LTC2372IUH-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2372IUH-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2372IUH-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2372IUH-18#PBF?
LTC2372IUH-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2372IUH-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 LTC2372IUH-18#PBF?
For technical support, including LTC2372IUH-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2372IUH-18#PBF requirements.
6.How does Aetrix verify that LTC2372IUH-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2372IUH-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 LTC2372IUH-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2372IUH-18#PBF?
All LTC2372IUH-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2372IUH-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 LTC2372IUH-18#PBF part is unused and in its original packaging.
Return procedure for LTC2372IUH-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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