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Analog Devices Inc. LTC2373CUH-18#TRPBF
- Part No.:
- LTC2373CUH-18#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2373CUH-18#TRPBF.pdf
- Description:
- IC ADC 18BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,484
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Product details
Overview
LTC2373CUH-18#TRPBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1 Msps, 8-channel successive approximation register (SAR) analog-to-digital converter with fully differential ±4.096V input range, 100 dB SNR (typical), and on-chip 2.048 V temperature-compensated reference. It operates from a single 5 V supply, supports SPI-compatible serial interface up to 100 MHz, and targets high-precision data acquisition in industrial process control systems.
For engineers reviewing the LTC2373CUH-18#TRPBF datasheet, LTC2373CUH-18#TRPBF pinout, LTC2373CUH-18#TRPBF application, or LTC2373CUH-18#TRPBF equivalent, key selection criteria include guaranteed no missing codes at 18 bits, ±2.75 LSB INL (max), 125°C operation capability, programmable sequencer depth of 16, and low 40 mW typical power dissipation at full throughput.
Technical Context
The LTC2373CUH-18#TRPBF integrates a low-crosstalk 8-channel multiplexer with configurable input modes-fully differential, pseudo-differential unipolar (0 V to 4.096 V), and pseudo-differential bipolar (±2.048 V)-enabling flexible signal routing without external front-end switching. Its internal oscillator eliminates external clock dependency for conversion timing.
It features a single-shot-capable reference buffer, digital gain compression, and nap/sleep modes that scale power with sampling rate: 40 mW at 1 Msps, 6.25 mW in nap mode, and 300 µW in sleep mode. The device guarantees operation from 0°C to 70°C and supports 1.8 V to 5 V I/O logic levels via OVDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes - ensures full dynamic range utilization and deterministic quantization behavior |
| Sampling Rate | 1 Msps maximum - enables real-time capture of signals up to 500 kHz (Nyquist-limited) |
| SNR | 100 dB (fully differential, fIN = 1 kHz) - supports >16.6 effective number of bits (ENOB) in precision measurement |
| INL | ±2.75 LSB (max) - guarantees monotonicity and linearity critical for closed-loop control accuracy |
| Reference | Onboard 2.048 V ±5 mV (20 ppm/°C max) - eliminates need for external precision reference and reduces BOM count |
| Power Dissipation | 40 mW at 1 Msps - enables high-speed acquisition in thermally constrained embedded systems |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade instrumentation and PLC modules |
Pinout & Package
32-lead 5 mm × 5 mm QFN package (UH) with exposed pad soldered to PCB ground. Pin 33 is the exposed thermal pad and must be connected to GND for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight single-ended inputs configurable as fully differential pairs or pseudo-differential combinations |
| COM | Common-mode reference | Provides return path for pseudo-differential bipolar/unipolar modes; tied to mid-scale reference |
| ADCIN+, ADCIN− | Dedicated differential input pair | Direct high-fidelity path bypassing multiplexer; used for highest-accuracy channel |
| MUXOUT+, MUXOUT− | Multiplexer output pair | Delivers selected channel's differential signal to ADC core; enables external monitoring |
| CNV | Conversion start trigger | Rising edge initiates sample-and-hold and conversion; supports precise timing synchronization |
| BUSY | Conversion status indicator | Active-high signal asserts during conversion; enables interrupt-driven firmware polling |
| SDO, SDI, SCK, RDL | SPI-compatible serial interface | Supports 1.8 V–5 V logic; RDL enables three-state output control for bus sharing |
| REFBUF, REFIN | Reference buffer and input | REFBUF outputs 4.096 V when enabled; REFIN accepts 2.048 V external reference or disables internal buffer |
| VDD, OVDD, GND | Power supplies | VDD = 5 V analog supply; OVDD = independent I/O supply (1.71 V–5.25 V); multiple GND pins reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-deep sequencer | Automates channel scanning order and configuration without host CPU intervention |
| Selectable digital gain compression | Prevents overflow in post-processing by scaling output codes before transmission |
| No pipeline delay or cycle latency | First conversion result available after one full cycle (1 µs), enabling deterministic real-time response |
| Channel-to-channel crosstalk ≤ –107 dB | Ensures accurate simultaneous multi-channel measurement without inter-channel interference |
| –3 dB input linear bandwidth = 22 MHz | Preserves fidelity of fast transients and high-frequency sensor outputs (e.g., piezoelectric accelerometers) |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring pressure, temperature, and flow sensors in distributed control systems (DCS) with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Precision digitization of conditioned analog sensor outputs with synchronized multi-channel sampling. Use Value: 18-bit resolution and ±2.75 LSB INL ensure <0.001% full-scale error in calibration-critical loop controllers. | Use Scenario: Capturing transient waveforms from vibration analysis equipment or partial discharge detectors. IC Role / Device Role / Timing Role: High-throughput SAR ADC with deterministic 1 µs conversion cycle and no latency for time-domain analysis. Use Value: 100 dB SNR and 22 MHz input bandwidth preserve signal integrity of fast-rising fault signatures. |
| Programmable Logic Controllers | Portable Instrumentation |
Use Scenario: Modular I/O cards in PLC backplanes requiring hot-swap capable, low-power analog inputs. IC Role / Device Role / Timing Role: Low-power 8-channel ADC with nap/sleep modes and 1.8 V–5 V I/O flexibility for mixed-voltage backplane designs. Use Value: 40 mW active power and 300 µW sleep current extend uptime in battery-backed control modules. | Use Scenario: Handheld multimeters and portable oscilloscopes needing compact, high-accuracy front ends. IC Role / Device Role / Timing Role: Integrated reference + multiplexer + ADC in 5 mm × 5 mm QFN reduces PCB area vs discrete solutions. Use Value: On-chip 2.048 V reference with 20 ppm/°C drift eliminates external reference IC and associated layout complexity. |
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, 1 MSPS, but uses parallel interface and requires external reference; higher 65 mW power | Best suited for FPGA-based systems with wide data buses and existing reference infrastructure | Choose AD7606C-18 if parallel interface simplifies host interface design and board space allows larger footprint |
| ADS8688IPWR | 8-channel, 16-bit, 1 MSPS, integrated PGA and reference; lower 92 dB SNR; SPI-only interface | Ideal for cost-sensitive applications where 16-bit resolution suffices and programmable gain adds value | Choose ADS8688IPWR when input signal conditioning (gain/attenuation) is required per channel and 16-bit ENOB is acceptable |
Compared with AD7606C-18 and ADS8688IPWR, the LTC2373CUH-18#TRPBF uniquely combines SPI interface, onboard reference, and 100 dB SNR in a compact QFN-making it optimal for space-constrained, high-fidelity, microcontroller-based data loggers requiring minimal external components.
Availability
LTC2373CUH-18#TRPBF is available at Aetrix Electronics and suitable for industrial process control, high-speed data acquisition, and portable instrumentation requiring stable component supply, long-term manufacturability, and guaranteed commercial-temperature performance.
Supply support for LTC2373CUH-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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2373CUH-18#TRPBF belongs to ADI's legacy Linear Technology precision SAR ADC product line, engineered for applications demanding ultra-low noise, high linearity, and integrated signal chain simplicity in harsh environments.
FAQ
What is the maximum sampling rate supported by the LTC2373CUH-18#TRPBF?
The LTC2373CUH-18#TRPBF supports a maximum sampling rate of 1 Msps, with a guaranteed conversion time of 527 ns and minimum inter-conversion period of 1 µs. This enables full 18-bit resolution sampling of signals up to 500 kHz while maintaining specified SNR and INL performance across all input ranges.
Does the LTC2373CUH-18#TRPBF require an external reference voltage?
No, the LTC2373CUH-18#TRPBF includes an onboard 2.048 V temperature-compensated reference with 20 ppm/°C max drift and a dedicated reference buffer. An external reference can be applied via REFIN only if overriding the internal reference is required; otherwise, the internal reference is fully functional and calibrated.
How does the programmable sequencer in the LTC2373CUH-18#TRPBF operate?
The LTC2373CUH-18#TRPBF features a 16-deep programmable sequencer that stores channel selection, input range, and gain settings. Once configured via SPI, it autonomously cycles through entries on each CNV pulse-reducing host processor overhead and enabling deterministic, jitter-free multi-channel acquisition without software intervention.
What power-saving modes does the LTC2373CUH-18#TRPBF offer?
The LTC2373CUH-18#TRPBF offers two low-power states: Nap mode (6.25 mW) automatically engages between conversions at reduced throughput, and Sleep mode (300 µW) disables the reference buffer and core circuitry entirely. Both modes retain register settings and resume operation within microseconds upon wake-up command.
Is the LTC2373CUH-18#TRPBF pin-compatible with other devices in the LTC2373 family?
Yes, all variants of the LTC2373-18-including LTC2373CUH-18#TRPBF, LTC2373IUH-18#TRPBF, and LTC2373HUH-18#TRPBF-share identical 32-lead 5 mm × 5 mm QFN (UH) packaging and pinout. Only the operating temperature grade differs: C-grade (0°C to 70°C) for LTC2373CUH-18#TRPBF.
LTC2373CUH-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):
- 1M
- 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:
- External, 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:
- -
LTC2373CUH-18#TRPBF FAQ
1.How can I place an order for LTC2373CUH-18#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2373CUH-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 LTC2373CUH-18#TRPBF reliable?
The price and inventory of LTC2373CUH-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 LTC2373CUH-18#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2373CUH-18#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2373CUH-18#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2373CUH-18#TRPBF?
LTC2373CUH-18#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2373CUH-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 LTC2373CUH-18#TRPBF?
For technical support, including LTC2373CUH-18#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2373CUH-18#TRPBF requirements.
6.How does Aetrix verify that LTC2373CUH-18#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2373CUH-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 LTC2373CUH-18#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2373CUH-18#TRPBF?
All LTC2373CUH-18#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2373CUH-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 LTC2373CUH-18#TRPBF part is unused and in its original packaging.
Return procedure for LTC2373CUH-18#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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