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Analog Devices Inc. LTC2372CUH-18#TRPBF
- Part No.:
- LTC2372CUH-18#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2372CUH-18#TRPBF.pdf
- Description:
- IC ADC 18BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,613
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Product details
Overview
LTC2372CUH-18#TRPBF 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 SNR (typical), and onboard 2.048V temperature-compensated reference. It operates from a single 5V supply, supports SPI-compatible serial interface up to 100MHz, and targets high-precision data acquisition in industrial process control and ATE systems.
For engineers reviewing the LTC2372CUH-18#TRPBF datasheet, LTC2372CUH-18#TRPBF pinout, LTC2372CUH-18#TRPBF application, or LTC2372CUH-18#TRPBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, ±2.75LSB max INL across all input ranges, programmable 16-deep sequencer, low 27mW power at full throughput, and operation up to 70°C ambient in a 5mm × 5mm QFN package.
Technical Context
The LTC2372CUH-18#TRPBF integrates a low-crosstalk 8-channel multiplexer with selectable fully differential, pseudo-differential unipolar (0V–4.096V), and pseudo-differential bipolar (±2.048V) input configurations. Its internal reference buffer delivers 4.096V output with 20ppm/°C max drift and supports overdrive for extended range operation.
Conversion timing is governed by an internal oscillator (tCONV = 1–1.5µs), eliminating external clock dependencies. The SPI interface supports 1.8V–5V I/O logic levels, includes BUSY and RDL handshaking, and enables configuration of digital gain compression and channel sequencing without pipeline latency or cycle delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no missing codes - ensures full dynamic range utilization in precision measurement. |
| Sampling Rate | 500ksps maximum - supports real-time capture of signals up to ~22MHz bandwidth (–3dB input linear BW). |
| SNR | 100dB typical (fully differential) - enables >16.6 effective number of bits (ENOB) for high-fidelity signal digitization. |
| INL | ±2.75LSB maximum - maintains linearity critical for closed-loop control and calibration-sensitive instrumentation. |
| Power Dissipation | 27mW at 500ksps - scales with sample rate via nap mode; drops to 300µW in sleep mode for intermittent acquisition. |
| Reference | Onboard 2.048V temp-compensated ref + buffer (4.096V output) - eliminates external reference design, reduces BOM count and layout sensitivity. |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade industrial environments with guaranteed specs across range. |
Pinout & Package
Package: 32-lead 5mm × 5mm plastic QFN (UH package) with exposed thermal pad (Pin 33, GND). RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight single-ended inputs configurable as fully differential pairs or pseudo-differential; COM serves as common-mode reference. |
| MUXOUT+, MUXOUT– | Multiplexer output terminals | Provide buffered differential output of selected channel pair for external monitoring or signal conditioning. |
| ADCIN+, ADCIN– | Main ADC input terminals | Accept final differential input after internal mux; define conversion point with 4ps RMS aperture jitter. |
| REFBUF, REFIN | Reference buffer and reference input | REFBUF outputs 4.096V (when enabled); REFIN accepts 2.048V internal ref or external 1.25–2.4V source. |
| SDO, SDI, SCK, CNV, BUSY, RDL | SPI interface and control signals | Support 100MHz SCK, support daisy-chain and multi-drop; CNV initiates conversion, BUSY indicates active conversion. |
| VDD, OVDD, GND | Power supplies | VDD = 4.75–5.25V analog supply; OVDD = 1.71–5.25V digital I/O supply; multiple GND pins minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-deep sequencer | Enables automatic round-robin or custom channel scanning without host CPU intervention - reduces firmware overhead in multi-sensor systems. |
| Selectably configurable input ranges | Single device supports fully differential (±4.096V), pseudo-diff unipolar (0–4.096V), and pseudo-diff bipolar (±2.048V) - simplifies design reuse across sensor types. |
| No pipeline delay / zero cycle latency | First conversion result available within one tCONV (≤1.5µs) after CNV assertion - essential for time-critical trigger-and-capture applications. |
| Low crosstalk multiplexer (<–107dB) | Prevents signal bleed between active and inactive channels - preserves accuracy in simultaneous multi-channel sampling scenarios. |
| Internal oscillator-based timing | Removes need for external master clock and associated jitter sources - improves SNR consistency and eases PCB layout. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-accuracy analog input modules acquiring temperature, pressure, and flow sensor signals in factory automation cabinets. IC Role / Device Role / Timing Role: Primary SAR ADC performing synchronized 8-channel sampling at 500ksps with programmable sequencing per control loop cycle. Use Value: ±2.75LSB INL and 100dB SNR ensure sub-0.01% measurement fidelity required for PID feedback stability and regulatory compliance. | Use Scenario: Distributed I/O nodes in oil & gas refineries measuring valve position, tank level, and chemical concentration under harsh EMI conditions. IC Role / Device Role / Timing Role: Precision front-end ADC with integrated reference and robust CMRR (>71dB) rejecting common-mode noise on long sensor cables. Use Value: Onboard 2.048V reference buffer eliminates external ref IC and associated drift, reducing calibration burden and long-term drift uncertainty. |
| High Speed Data Acquisition | ATE Systems |
Use Scenario: Modular DAQ cards capturing transient waveforms from vibration sensors, acoustic emitters, or motor current signatures. IC Role / Device Role / Timing Role: 18-bit SAR ADC delivering 500ksps sustained throughput with no missing codes and <1µs aperture jitter for time-domain analysis. Use Value: 22MHz –3dB input bandwidth and 4ps RMS aperture jitter preserve signal integrity for FFT-based diagnostics up to Nyquist frequency. | Use Scenario: Pin electronics in semiconductor test handlers requiring precise DC parametric measurements and dynamic waveform capture. IC Role / Device Role / Timing Role: Multi-channel voltage/current digitizer supporting both static V/I sourcing verification and dynamic pattern capture via sequenced channel readout. Use Value: Programmable sequencer and SPI interface enable tight synchronization with pattern generator clocks, minimizing test time per device. |
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, internal ref (4.096V), but requires external 5V and ±15V supplies for analog front-end drivers; no integrated mux output buffers. | Targets higher-speed applications where 1MSPS is needed; less suitable for single-supply systems due to dual-supply driver requirement. | Select AD7606C-18 when throughput >500ksps is mandatory and dual-supply infrastructure exists. |
| ADS8688IPWR | 8-channel, 16-bit, 500ksps, integrated PGA (±10.24V range), single 5V supply, but SNR = 92dB (typ) and INL = ±3.5LSB (max) - lower resolution and accuracy. | Better suited for cost-sensitive industrial I/O where 16-bit resolution suffices and programmable gain adds flexibility for varying sensor outputs. | Choose ADS8688IPWR when system-level accuracy requirements allow 16-bit performance and on-chip PGA simplifies analog front-end design. |
Compared with AD7606C-18 and ADS8688IPWR, the LTC2372CUH-18#TRPBF uniquely balances 18-bit no-missing-codes fidelity, single 5V operation, integrated reference buffer, and low-latency sequenced acquisition - making it optimal for compact, high-accuracy, single-supply DAQ subsystems where board space and supply complexity are constrained.
Availability
LTC2372CUH-18#TRPBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2372CUH-18#TRPBF 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 LTC2372CUH-18#TRPBF belongs to ADI's precision SAR ADC product line, engineered for applications demanding high resolution, low noise, and deterministic timing - especially in space-constrained, single-supply industrial and test equipment.
FAQ
What is the maximum sampling rate of the LTC2372CUH-18#TRPBF?
The LTC2372CUH-18#TRPBF achieves a maximum sampling rate of 500ksps with guaranteed 18-bit no-missing-codes performance and ±2.75LSB maximum INL. At this rate, conversion time is 1–1.5µs, and total cycle time is 2µs - enabling real-time capture of signals with up to ~22MHz input bandwidth.
Does the LTC2372CUH-18#TRPBF require an external reference?
No, the LTC2372CUH-18#TRPBF includes an onboard 2.048V temperature-compensated reference and a dedicated reference buffer that outputs 4.096V. The internal reference is specified with 4–20ppm/°C drift and supports overdrive for extended-range operation - eliminating the need for external reference components in most designs.
What input configurations does the LTC2372CUH-18#TRPBF support?
The LTC2372CUH-18#TRPBF supports three user-selectable analog input configurations: fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V). These are configured via SPI registers and apply uniformly across all eight channels, enabling flexible sensor interface without hardware changes.
How does the programmable sequencer in the LTC2372CUH-18#TRPBF operate?
The LTC2372CUH-18#TRPBF features a 16-deep programmable sequencer that autonomously cycles through up to 16 channel configurations (including mux settings, input range, and gain) without host intervention. Each sequence entry defines CHx selection and mode; the sequencer advances on each CNV pulse, enabling deterministic multi-channel acquisition with minimal CPU load.
What is the operating temperature range for the LTC2372CUH-18#TRPBF?
The LTC2372CUH-18#TRPBF is rated for 0°C to 70°C ambient operation (C-grade). All key specifications - including 18-bit resolution, ±2.75LSB INL, 100dB SNR, and 500ksps throughput - are guaranteed across this full commercial temperature range, ensuring consistent performance in industrial control cabinets and laboratory instruments.
LTC2372CUH-18#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2372CUH-18#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2372CUH-18#TRPBF 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#TRPBF reliable?
The price and inventory of LTC2372CUH-18#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2372CUH-18#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2372CUH-18#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2372CUH-18#TRPBF?
LTC2372CUH-18#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2372CUH-18#TRPBF 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#TRPBF?
For technical support, including LTC2372CUH-18#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2372CUH-18#TRPBF requirements.
6.How does Aetrix verify that LTC2372CUH-18#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2372CUH-18#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2372CUH-18#TRPBF?
All LTC2372CUH-18#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2372CUH-18#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC2372CUH-18#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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