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Analog Devices Inc. LTC2376CDE-18#TRPBF
- Part No.:
- LTC2376CDE-18#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2376CDE-18#TRPBF.pdf
- Description:
- IC ADC 18BIT SAR 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,838
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Product details
Overview
LTC2376CDE-18#TRPBF from Analog Devices (formerly Linear Technology) is an 18-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with ±1.75LSB INL max, 102dB SNR at 2kHz, fully differential ±VREF input (2.5V–5.1V), and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5V analog supply and supports 1.8V–5V I/O logic, targeting high-precision data acquisition in medical imaging and portable instrumentation.
For engineers reviewing the LTC2376CDE-18#TRPBF datasheet, LTC2376CDE-18#TRPBF pinout, LTC2376CDE-18#TRPBF application, or LTC2376CDE-18#TRPBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, daisy-chain SPI interface compatibility, internal conversion clock, auto power-down (3.4µW at 250sps), and DGC-enabled 0.5V–4.5V input range with 5V reference.
Technical Context
The LTC2376CDE-18#TRPBF implements a charge redistribution capacitor DAC (CDAC) architecture with differential comparator and 18-bit successive approximation logic. Conversion timing is governed by an internal oscillator (1.9–3µs), eliminating external clock dependency and ensuring zero pipeline delay or cycle latency.
Its dual-supply design separates analog (VDD = 2.5V) and digital I/O (OVDD = 1.71–5.25V) domains, enabling mixed-voltage system integration. The REF/DGC pin selects between full ±VREF range (REF tied high) or compressed 10%–90% range (REF/DGC tied low), directly enabling single-supply driver operation without sacrificing resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 discrete output levels with guaranteed no missing codes across temperature. |
| Sampling Rate | 250ksps - supports real-time acquisition of signals up to 125kHz Nyquist bandwidth. |
| SNR | 102dB (typ, fIN = 2kHz, VREF = 5V) - enables >16.9 effective bits (ENOB) in precision measurement systems. |
| INL | ±1.75LSB (max) - ensures monotonicity and accurate end-point linearity for calibration-critical applications. |
| Power Dissipation | 3.4mW at 250ksps - allows battery-powered operation with thermal budget headroom in compact enclosures. |
| Digital Gain Compression | Configurable via REF/DGC pin - maps 0V–VREF input to 0.1×VREF–0.9×VREF digital range, enabling LT6350 operation from +5.5V only. |
| Reference Range | 2.5V to 5.1V - supports flexible signal scaling while maintaining 38µV LSB size at 5V reference. |
Pinout & Package
Package: 16-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 17 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog inputs | Accept ±VREF fully differential signal; input capacitance 45pF in sample mode; require low-impedance drive for <3.46µs settling. |
| REF | Reference voltage input | Defines full-scale range (2.5V–5.1V); decoupled with 47µF X5R ceramic capacitor at pin. |
| REF/DGC | Reference/Digital Gain Compression control | Tied to REF → full ±VREF range; tied to GND → DGC enabled (0.1–0.9×VREF mapping). |
| CNV | Convert trigger input | Rising edge initiates conversion and powers up ADC; asynchronous, no setup/hold required relative to SCK. |
| BUSY | Conversion status indicator | Active-high open-drain output signaling conversion in progress; used for timing synchronization. |
| SDO, SCK, RDL/SDI, CHAIN | SPI-compatible serial interface | Supports 1.8V–5V logic; daisy-chain mode enabled when CHAIN = high; MSB-first 2's complement output. |
| VDD, OVDD, GND | Power supplies | VDD = 2.5V ±62.5mV analog supply; OVDD = 1.71–5.25V I/O supply; multiple GND pins (including exposed pad) for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes at 18 bits | Guaranteed over 0°C to 70°C operating range - eliminates code ambiguity in closed-loop control and metrology. |
| Digital Gain Compression (DGC) | Enables single-supply amplifier biasing (e.g., LT6350 from +5.5V) while preserving full 18-bit resolution and dynamic range. |
| Internal conversion clock | Removes need for external timing circuitry - simplifies layout and improves jitter immunity in noise-sensitive environments. |
| Auto power-down between conversions | Reduces current to 0.9µA typical during idle - scales linearly with sampling rate for ultra-low average power in burst-mode systems. |
| SPI daisy-chain mode | Allows synchronous readout of multiple LTC2376 devices using single SCK/SDO lines - reduces FPGA/GPIO count in multi-channel DAQ. |
Applications
| Medical Imaging Signal Digitization | Portable High-Speed Data Acquisition |
|---|---|
Use Scenario: Digitizing low-noise CT/MRI sensor outputs requiring >16 ENOB and minimal harmonic distortion. IC Role / Device Role / Timing Role: Primary SAR ADC capturing differential analog signals at 250ksps with internal clock synchronization and zero latency. Use Value: 102dB SNR and –126dB THD enable detection of weak tissue contrast signals without post-processing correction. |
Use Scenario: Battery-powered field instruments measuring vibration, acoustic emission, or partial discharge. IC Role / Device Role / Timing Role: Low-power 18-bit ADC with auto power-down, supporting burst sampling at 250ksps and µW-level sleep current. Use Value: 3.4mW active power and 3.4µW standby extend runtime in handheld analyzers without compromising resolution. |
| Industrial Process Control Monitoring | Automated Test Equipment (ATE) |
Use Scenario: High-accuracy monitoring of pressure, temperature, and flow transducers in factory automation PLCs. IC Role / Device Role / Timing Role: Precision ADC interfaced to isolated ±10V sensor outputs via LT6350 driver with DGC enabled. Use Value: DGC allows single +5.5V supply for both ADC and driver, reducing BOM cost and board space versus dual-rail solutions. |
Use Scenario: Multi-channel parametric testing of ICs requiring synchronized sampling and deterministic latency. IC Role / Device Role / Timing Role: SPI daisy-chained ADC node providing time-aligned 18-bit samples across 8+ channels. Use Value: No pipeline delay and daisy-chain mode ensure sub-microsecond inter-channel skew for stimulus-response validation. |
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 | 2MSPS, 18-bit SAR; higher speed but 4.5mW at full rate; no DGC; requires external reference buffer. | Better suited for high-throughput transient capture; less optimal for low-power, single-supply sensor interfaces. | Select when sampling rate >500ksps is required and system can accommodate higher power and external reference conditioning. |
| ADS8860IDRCT | 1MSPS, 16-bit SAR; lower resolution; 1.5mW at 1MSPS; SPI-only interface; no DGC or daisy-chain mode. | Targeted at cost-sensitive, medium-precision applications where 16-bit resolution suffices. | Select for simpler, lower-cost designs where 16-bit ENOB and absence of DGC are acceptable trade-offs. |
Compared with AD7986BCPZ-RL7 and ADS8860IDRCT, the LTC2376CDE-18#TRPBF uniquely balances 250ksps throughput, 102dB SNR, DGC-enabled single-supply operation, and daisy-chain capability-making it optimal for portable, precision, multi-channel systems constrained by power and supply architecture.
Availability
LTC2376CDE-18#TRPBF is available at Aetrix Electronics and suitable for medical imaging systems, portable instrumentation, industrial process controllers, and automated test equipment requiring stable component supply and long-term production continuity.
Supply support for LTC2376CDE-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2376-18 family was designed for high-accuracy, low-power data acquisition in space-, power-, and noise-constrained environments-including portable diagnostics, industrial sensors, and precision test systems.
FAQ
What is the operating temperature range for the LTC2376CDE-18#TRPBF?
The LTC2376CDE-18#TRPBF is specified for 0°C to 70°C ambient operation (C-grade). This matches its DFN package marking and orderable part suffix "CDE", distinguishing it from I-grade (–40°C to 85°C) and H-grade (–40°C to 125°C) variants. All electrical specifications in the datasheet labeled with "l" apply across this full range.
Does the LTC2376CDE-18#TRPBF require an external reference voltage source?
Yes, the LTC2376CDE-18#TRPBF requires an external reference voltage applied to the REF pin, adjustable from 2.5V to 5.1V. It does not include an internal reference. A 47µF X5R ceramic capacitor must be placed directly at the REF pin for stability, and the reference source must supply up to 0.2mA at 250ksps.
How does Digital Gain Compression (DGC) function in the LTC2376CDE-18#TRPBF?
In the LTC2376CDE-18#TRPBF, DGC is activated by grounding the REF/DGC pin. This remaps the ADC's full-scale input range from ±VREF to 0.1×VREF to 0.9×VREF (e.g., 0.5V–4.5V with 5V reference), allowing driver amplifiers like the LT6350 to operate from a single +5.5V supply while retaining full 18-bit resolution and linearity.
What package type and thermal characteristics does the LTC2376CDE-18#TRPBF use?
The LTC2376CDE-18#TRPBF uses a 16-lead, 4mm × 3mm plastic DFN package with exposed thermal pad (Pin 17 = GND). Its θJA is 40°C/W when the exposed pad is properly soldered to a PCB ground plane. This enables reliable operation at full 250ksps sampling rate without forced air cooling in compact enclosures.
Can the LTC2376CDE-18#TRPBF interface directly with a 1.8V microcontroller SPI bus?
Yes, the LTC2376CDE-18#TRPBF supports 1.8V logic levels via its OVDD supply pin. When OVDD = 1.8V, all digital inputs (CNV, SCK, CHAIN, RDL/SDI) recognize 0.2×OVDD (0.36V) as logic low and 0.8×OVDD (1.44V) as logic high, and digital outputs (SDO, BUSY) swing rail-to-rail - enabling direct, level-compatible connection to 1.8V host processors without translators.
LTC2376CDE-18#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.375V ~ 2.625V
- Voltage - Supply, Digital:
- 2.375V ~ 2.625V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2376CDE-18#TRPBF FAQ
1.How can I place an order for LTC2376CDE-18#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2376CDE-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 LTC2376CDE-18#TRPBF reliable?
The price and inventory of LTC2376CDE-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 LTC2376CDE-18#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2376CDE-18#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2376CDE-18#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2376CDE-18#TRPBF?
LTC2376CDE-18#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2376CDE-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 LTC2376CDE-18#TRPBF?
For technical support, including LTC2376CDE-18#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2376CDE-18#TRPBF requirements.
6.How does Aetrix verify that LTC2376CDE-18#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2376CDE-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 LTC2376CDE-18#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2376CDE-18#TRPBF?
All LTC2376CDE-18#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2376CDE-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 LTC2376CDE-18#TRPBF part is unused and in its original packaging.
Return procedure for LTC2376CDE-18#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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