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Analog Devices Inc. LTC2372CUH-18#PBF
- Part No.:
- LTC2372CUH-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2372CUH-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
LTC2372CUH-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 500ksps, 8-channel successive approximation register (SAR) analog-to-digital converter with integrated 2.048V temperature-compensated reference and SPI-compatible serial interface. It supports fully differential (±4.096V), pseudo-differential unipolar (0–4.096V), and pseudo-differential bipolar (±2.048V) input ranges, achieves ±2.75LSB max INL, 100dB typical SNR (fully differential), and operates from a single 5V supply with 1.8–5V I/O compatibility. It is used in high-precision industrial data acquisition systems requiring low crosstalk and guaranteed no missing codes.
For engineers reviewing the LTC2372CUH-18#PBF datasheet, LTC2372CUH-18#PBF pinout, LTC2372CUH-18#PBF application, or LTC2372CUH-18#PBF equivalent, key selection considerations include its 32-lead 5mm × 5mm QFN package, programmable 16-deep sequencer, on-chip reference buffer, sleep mode (300μW), and guaranteed operation from 0°C to 70°C.
Technical Context
The LTC2372CUH-18#PBF implements a true SAR architecture with no pipeline delay or cycle latency, enabling deterministic conversion timing critical for closed-loop control. Its highly configurable 8-channel multiplexer features low crosstalk (<–107dB) and supports three distinct analog input configurations via register programming - each with validated INL, SNR, and THD performance across temperature.
Internal timing is governed by an onboard oscillator, eliminating external clock dependency for conversion start; the CNV signal initiates sampling, and BUSY indicates conversion completion. The SPI interface operates at up to 100MHz SCK (10ns period), supports 1.8V/2.5V/3.3V/5V logic levels, and includes RDL-controlled tri-state output for bus sharing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no missing codes - ensures full dynamic range utilization in precision measurement. |
| Throughput Rate | 500ksps maximum - supports real-time monitoring of fast transients in PLC and ATE applications. |
| INL (Max) | ±2.75LSB - enables accurate end-point calibration and high-fidelity waveform capture. |
| SNR (Typ) | 100dB (fully diff), 95dB (pseudo-diff) - delivers >16.6 effective bits for low-noise sensor interfacing. |
| Power Dissipation | 27mW at 500ksps, 300μW in sleep - scales with sample rate for battery-aware portable instrumentation. |
| Reference | Onboard 2.048V ±5mV, 20ppm/°C max TC - eliminates external reference component and layout sensitivity. |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade industrial control environments. |
Pinout & Package
Package: 32-lead 5mm × 5mm plastic QFN (UH package); exposed pad (Pin 33) must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight single-ended inputs configurable as fully/pseudo-differential pairs; COM serves as common-mode reference. |
| MUXOUT+, MUXOUT– | Multiplexer output terminals | Differential output of selected channel pair; connects directly to ADCIN+ and ADCIN– for optimized signal routing. |
| ADCIN+, ADCIN– | ADC core analog inputs | High-impedance sampling nodes accepting fully differential signals up to ±4.096V range. |
| REFBUF, REFIN | Reference buffer and input | REFBUF outputs 4.096V when enabled; REFIN accepts 1.25–2.4V external reference or connects to internal 2.048V ref. |
| SDO, SDI, SCK, RDL, BUSY, CNV | SPI interface and control | Standard 4-wire SPI plus BUSY/CNV for precise timing; RDL enables multi-device bus sharing without external logic. |
| VDD, OVDD, GND | Power supplies | VDD = 4.75–5.25V analog supply; OVDD = 1.71–5.25V digital I/O supply - enables mixed-voltage system integration. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable sequencer | 16-deep channel sequence memory allows autonomous round-robin or custom scan patterns without host intervention. |
| Selectible digital gain compression | Configurable scaling preserves resolution when input range is reduced, optimizing dynamic range usage. |
| No pipeline delay | Deterministic 1.5µs conversion time and immediate data availability simplify real-time control loop timing. |
| Low crosstalk multiplexer | –107dB channel-to-channel isolation prevents signal leakage between active and inactive channels. |
| Single-shot reference buffer | Reference wakes in 200ms after enable; supports burst-mode acquisition with stable settling. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-density analog input modules in modular PLC racks acquiring voltage/current signals from field transmitters. IC Role / Device Role / Timing Role: Primary 18-bit ADC front-end with sequenced multi-channel sampling and SPI interface to ARM-based controller. Use Value: ±2.75LSB INL and 100dB SNR ensure accurate representation of 4–20mA loop signals over temperature, reducing calibration burden. | Use Scenario: Distributed I/O systems monitoring pressure, temperature, and flow in chemical plant DCS cabinets. IC Role / Device Role / Timing Role: Precision SAR ADC with integrated reference and low-power nap mode for energy-efficient continuous monitoring. Use Value: Onboard 2.048V reference eliminates external component count and improves long-term stability vs. discrete reference solutions. |
| High Speed Data Acquisition | Portable Instrumentation |
Use Scenario: Benchtop oscilloscopes and spectrum analyzers capturing transient waveforms at >100ksps rates. IC Role / Device Role / Timing Role: High-speed 8-channel digitizer with fully differential input support and deterministic 2µs cycle time. Use Value: 500ksps throughput with no missing codes enables faithful reconstruction of fast edges and harmonic content. | Use Scenario: Handheld multimeters and power quality analyzers requiring battery longevity and compact form factor. IC Role / Device Role / Timing Role: Low-power 18-bit ADC with sleep mode (300μW) and 5mm × 5mm QFN footprint for space-constrained designs. Use Value: 27mW active power and automatic nap mode reduce average current draw, extending battery life in portable test gear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 8-channel, 18-bit, 1MSPS, internal reference (4.096V), parallel + SPI interface, 4.5–5.5V supply | Higher speed, wider supply range, but larger 64-lead LQFP package and no programmable sequencer depth | Preferred when higher throughput or parallel interface is required; requires PCB redesign due to different pinout and package. |
| ADS8688IPWR | 8-channel, 16-bit, 500ksps, integrated reference (4.096V), SPI-only, 2.7–5.5V supply, smaller 32-pin TSSOP | 2-bit lower resolution, no fully differential mode, but lower supply voltage support and lower cost | Selected for cost-sensitive industrial sensors where 16-bit resolution suffices and 2.7V operation is needed. |
Compared with AD7606C-18 and ADS8688IPWR, the LTC2372CUH-18#PBF uniquely combines 18-bit no-missing-codes accuracy, fully differential input capability, and a 16-entry programmable sequencer in a compact QFN - making it optimal for space-constrained, high-fidelity multi-channel acquisition where deterministic timing and low crosstalk are critical.
Availability
LTC2372CUH-18#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition requiring stable component supply, guaranteed 0°C to 70°C operation, and long-term manufacturing continuity.
Supply support for LTC2372CUH-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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2372 family was designed specifically for high-accuracy, low-power, multi-channel data acquisition in industrial automation and test equipment - emphasizing integrated references, flexible input configurations, and robust SPI timing.
FAQ
What is the maximum sampling rate of the LTC2372CUH-18#PBF?
The LTC2372CUH-18#PBF achieves a maximum sampling rate of 500ksps with guaranteed timing specifications across its full operating temperature range (0°C to 70°C). This rate is supported by its internal oscillator and fixed 2µs conversion cycle time, enabling deterministic real-time acquisition without external clock management.
Does the LTC2372CUH-18#PBF require an external reference?
No, the LTC2372CUH-18#PBF integrates a precision 2.048V temperature-compensated reference with 20ppm/°C max drift and a dedicated reference buffer (REFBUF) that outputs 4.096V. An external reference may be applied via REFIN (1.25–2.4V), but it is not required for standard operation.
What input configurations does the LTC2372CUH-18#PBF support?
The LTC2372CUH-18#PBF supports three user-selectable analog input configurations: fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V). Each configuration is validated for INL, SNR, and THD performance per the datasheet, and selection is made via configuration register settings.
How does the programmable sequencer in the LTC2372CUH-18#PBF operate?
The LTC2372CUH-18#PBF includes a 16-deep programmable sequencer that autonomously cycles through up to 16 channel selections (CH0–CH7) in user-defined order. Once configured, it performs conversions without host intervention, reducing SPI traffic and enabling efficient multi-channel monitoring in embedded systems.
What is the power consumption of the LTC2372CUH-18#PBF in sleep mode?
In sleep mode, the LTC2372CUH-18#PBF consumes only 300μW (typical), achieved by disabling the reference buffer, ADC core, and digital interface while retaining register state. This ultra-low power state is ideal for battery-powered instrumentation during idle periods, with wake-up time under 200ms when re-enabling REFBUF.
LTC2372CUH-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:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2372CUH-18#PBF FAQ
1.How can I place an order for LTC2372CUH-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2372CUH-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 LTC2372CUH-18#PBF reliable?
The price and inventory of LTC2372CUH-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 LTC2372CUH-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2372CUH-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2372CUH-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2372CUH-18#PBF?
LTC2372CUH-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2372CUH-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 LTC2372CUH-18#PBF?
For technical support, including LTC2372CUH-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2372CUH-18#PBF requirements.
6.How does Aetrix verify that LTC2372CUH-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2372CUH-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 LTC2372CUH-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2372CUH-18#PBF?
All LTC2372CUH-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2372CUH-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 LTC2372CUH-18#PBF part is unused and in its original packaging.
Return procedure for LTC2372CUH-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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