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Analog Devices Inc. LTC2372IUH-18#TRPBF
- Part No.:
- LTC2372IUH-18#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2372IUH-18#TRPBF.pdf
- Description:
- IC ADC 18BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,635
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Product details
Overview
LTC2372IUH-18#TRPBF from Analog Devices (formerly Linear Technology) is an 18-bit, 500ksps, 8-channel successive approximation register (SAR) ADC with integrated 2.048V temperature-compensated reference and programmable sequencer. It supports fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) input ranges, achieves ±2.75LSB max INL and 100dB typical SNR (fully differential), and operates across –40°C to +85°C for industrial data acquisition systems.
For engineers reviewing the LTC2372IUH-18#TRPBF datasheet, LTC2372IUH-18#TRPBF pinout, LTC2372IUH-18#TRPBF application, or LTC2372IUH-18#TRPBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, on-chip reference buffer with 20ppm/°C drift, SPI-compatible serial interface supporting 1.8V–5V I/O, low 27mW power at full throughput, and 32-lead 5mm × 5mm QFN package with exposed thermal pad.
Technical Context
The LTC2372IUH-18#TRPBF implements a low-crosstalk 8-channel analog multiplexer with per-channel configuration via SPI, enabling flexible input range selection and channel sequencing without external control logic. Its internal oscillator eliminates external clock dependency, and the absence of pipeline delay ensures deterministic 1.5µs conversion time with zero cycle latency.
It integrates a precision 2.048V reference with onboard buffer capable of driving external circuitry, and supports REFBUF overdrive up to 5V for extended dynamic range. Power management includes nap mode (1.25mA) between conversions and sleep mode (300µW), scaling dissipation with sampling rate while maintaining guaranteed operation to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no missing codes - ensures full code coverage for high-fidelity measurement integrity |
| Sampling Rate | 500ksps maximum - enables real-time capture of signals up to 22MHz bandwidth (–3dB) |
| INL (max) | ±2.75LSB - supports accurate DC and low-frequency measurements in precision instrumentation |
| SNR (typ) | 100dB (fully diff) / 95dB (pseudo-diff) - delivers >16.6 effective bits for demanding signal analysis |
| Reference | Onboard 2.048V ±0.25% temp-compensated reference with 20ppm/°C drift - eliminates need for external reference IC |
| Power (500ksps) | 27mW typical - enables compact, thermally constrained designs without active cooling |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including PLC and process control cabinets |
Pinout & Package
32-lead 5mm × 5mm plastic QFN (UH package) with exposed GND pad (Pin 33) requiring PCB soldering for thermal and electrical integrity. Package meets JEDEC MO-220 standards and supports reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight single-ended or differential-capable inputs configurable via internal MUX |
| COM | Common-mode reference | Provides return path for pseudo-differential configurations; tied to GND or bias voltage |
| ADCIN+, ADCIN– | Differential analog input pair | Direct connection point for fully differential sensor outputs or transformer-coupled signals |
| MUXOUT+, MUXOUT– | Multiplexer output pair | Drives ADC core after channel selection; isolated from input pins to minimize crosstalk |
| CNV | Conversion start trigger | Edge-sensitive input initiating sample-and-hold and conversion sequence |
| BUSY | Conversion status indicator | Active-high open-drain output signaling ongoing conversion; used for timing synchronization |
| SDO, SDI, SCK, RDL | SPI serial interface | Supports 1.8V–5V logic levels; RDL enables 3-wire shared-bus operation |
| REFBUF, REFIN | Reference buffer control | REFIN accepts external 2.048V reference; REFBUF provides buffered 4.096V output when enabled |
| VDD, OVDD, GND | Power supplies | VDD = 5V analog supply; OVDD = 1.71–5.25V digital I/O supply; multiple GND pins reduce ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-deep sequencer | Enables automatic round-robin or custom channel scanning without host CPU intervention |
| Selectable digital gain compression | Adjusts output code scaling to maximize dynamic range utilization for undersized input signals |
| No pipeline delay / zero latency | Delivers first valid result within one conversion cycle - critical for closed-loop control timing |
| Channel-to-channel crosstalk ≤ –107dB | Preserves signal integrity during simultaneous multi-channel monitoring of high-isolation sensors |
| Aperture jitter = 4ps RMS | Minimizes sampling uncertainty for high-frequency signal fidelity up to Nyquist limit |
Applications
| Industrial Process Monitoring | High-Speed Data Acquisition |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow transducers in chemical plant DCS racks. IC Role / Device Role / Timing Role: 8-channel SAR ADC digitizing 4–20mA loop outputs and RTD bridges with synchronized sampling. Use Value: 100dB SNR and ±2.75LSB INL ensure <0.001% measurement accuracy across 40+ year calibration intervals. |
Use Scenario: Portable oscilloscope front-end capturing transient waveforms in field service tools. IC Role / Device Role / Timing Role: High-speed digitizer with internal reference and sequencer managing dual-sensor inputs (voltage + current). Use Value: 500ksps throughput and 22MHz linear bandwidth support 100kSPS effective sample rates with oversampling noise reduction. |
| Programmable Logic Controllers | Automated Test Equipment |
Use Scenario: Modular I/O card in DIN-rail mounted PLC handling mixed analog inputs from motors and valves. IC Role / Device Role / Timing Role: Precision ADC with programmable input ranges adapting to varying sensor types (0–10V, ±10V, 4–20mA). Use Value: Fully differential and pseudo-differential modes eliminate need for external level-shifting circuitry, reducing BOM count. |
Use Scenario: ATE system measuring parametric data (VGS(th), RDS(on)) on power semiconductors under pulsed bias. IC Role / Device Role / Timing Role: Multi-channel digitizer capturing fast transient responses with deterministic 1.5µs conversion time. Use Value: Nap/sleep modes cut standby power to 300µW, enabling energy-efficient test sequencing between device under test cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 18-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7986BCPZ-RL7 | 18-bit, 1MSPS, 8-channel SAR ADC; requires external reference; 40-lead LFCSP package | Higher speed but no integrated reference or sequencer; needs additional ref buffer and control logic | Choose when >500ksps throughput is required and board space allows external reference design |
| ADS8860IRGET | 16-bit, 1MSPS, single-channel SAR ADC; integrated reference; 20-lead VQFN | Lower resolution, no multiplexer, no sequencer; optimized for single-sensor high-speed streaming | Choose for cost-sensitive, single-input applications where 16-bit resolution suffices and layout simplicity is prioritized |
Compared with AD7986BCPZ-RL7 and ADS8860IRGET, the LTC2372IUH-18#TRPBF uniquely combines 18-bit precision, integrated 2.048V reference with buffer, 8-channel MUX, and programmable sequencer in a single 32-pin QFN - reducing system component count and simplifying timing-critical industrial DAQ designs.
Availability
LTC2372IUH-18#TRPBF is available at Aetrix Electronics and suitable for industrial process control, high-speed data acquisition, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2372IUH-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 LTC2372IUH-18#TRPBF belongs to ADI's precision SAR ADC product line, engineered for high-accuracy, low-power, multi-channel data acquisition in harsh industrial environments where reliability and long-term stability are critical.
FAQ
What is the operating temperature range for the LTC2372IUH-18#TRPBF?
The LTC2372IUH-18#TRPBF is rated for operation from –40°C to +85°C, making it suitable for industrial environments such as factory automation, motor drives, and outdoor instrumentation enclosures where ambient temperatures exceed commercial-grade limits. This grade ('I') is confirmed in the order information table and validated across all electrical specifications in the datasheet.
Does the LTC2372IUH-18#TRPBF require an external reference?
No, the LTC2372IUH-18#TRPBF includes an onboard 2.048V temperature-compensated reference with 20ppm/°C max drift and a dedicated reference buffer (REFBUF) that can be configured to output 4.096V. External reference use (via REFIN pin) is optional and only needed when higher initial accuracy or different voltage scaling is required.
How many channels does the LTC2372IUH-18#TRPBF support, and what input configurations are available?
The LTC2372IUH-18#TRPBF supports eight analog input channels (CH0–CH7) with a highly configurable multiplexer enabling fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) input ranges - all selectable per channel via SPI configuration registers.
What is the power consumption of the LTC2372IUH-18#TRPBF at full 500ksps throughput?
At 500ksps sampling rate, the LTC2372IUH-18#TRPBF consumes 27mW typical total power (7mA @ 5V VDD + 1.5mA @ 2.5V OVDD). In nap mode between conversions, current drops to 1.25mA; in sleep mode, total power falls to 300µW - enabling ultra-low-power operation during idle periods without sacrificing wake-up speed.
Is the LTC2372IUH-18#TRPBF pin-compatible with other members of the LTC2372 family?
Yes, all LTC2372 variants - including LTC2372CUH-18#TRPBF (0°C to 70°C), LTC2372IUH-18#TRPBF (–40°C to 85°C), and LTC2372HUH-18#TRPBF (–40°C to 125°C) - share identical 32-lead 5mm × 5mm QFN (UH) packaging and pinout. Only temperature grade and ordering suffix differ; no PCB redesign is needed when upgrading thermal rating.
LTC2372IUH-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:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2372IUH-18#TRPBF FAQ
1.How can I place an order for LTC2372IUH-18#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2372IUH-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 LTC2372IUH-18#TRPBF reliable?
The price and inventory of LTC2372IUH-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 LTC2372IUH-18#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2372IUH-18#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2372IUH-18#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2372IUH-18#TRPBF?
LTC2372IUH-18#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2372IUH-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 LTC2372IUH-18#TRPBF?
For technical support, including LTC2372IUH-18#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2372IUH-18#TRPBF requirements.
6.How does Aetrix verify that LTC2372IUH-18#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2372IUH-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 LTC2372IUH-18#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2372IUH-18#TRPBF?
All LTC2372IUH-18#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2372IUH-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 LTC2372IUH-18#TRPBF part is unused and in its original packaging.
Return procedure for LTC2372IUH-18#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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