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Analog Devices Inc. LTC2471CDD#TRPBF
- Part No.:
- LTC2471CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2471CDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,272
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Product details
Overview
LTC2471CDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, single-ended delta-sigma ADC with integrated 1.25V precision reference, I²C interface, and selectable 208sps/833sps output rate. It operates from 2.7V to 5.5V, draws 3.5mA typical supply current during conversion, and achieves ±1mV offset error and ±0.01% gain error - ideal for low-power sensor monitoring and embedded data acquisition.
For engineers reviewing the LTC2471CDD#TRPBF datasheet, LTC2471CDD#TRPBF pinout, LTC2471CDD#TRPBF application, or LTC2471CDD#TRPBF equivalent, key selection criteria include its 12-lead 3mm × 3mm DFN package, C-grade 0°C to 70°C temperature range, 2ppm/°C reference drift, single-cycle settling, and 200nA sleep current - all critical for battery-powered instrumentation and space-constrained industrial sensing.
Technical Context
The LTC2471CDD#TRPBF implements a proprietary delta-sigma architecture with internal oscillator and no external timing components required. Its input sampling scheme reduces average input current to 50nA, enabling direct RC filter interfacing without significant error.
It supports two conversion modes: 208sps (4.8ms conversion time, 8192× oversampling) and 833sps (1.2ms, 2048× oversampling), delivering relaxed anti-aliasing requirements and true single-cycle operation with auto shutdown after each conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity analog measurement |
| Reference Voltage | 1.25V ±3mV (1.247V–1.253V) - sets full-scale input range; stable over temperature and supply |
| Offset Error | ±1mV - ensures accurate zero-scale reading without calibration in most applications |
| Gain Error | ±0.01% of FS - enables precise scaling across full input range without per-unit trimming |
| Supply Current (Conv.) | 3.5mA typical - defines active power budget for continuous or burst-mode sensing |
| Sleep Current | 2µA max - enables multi-year battery life in wake-on-event sensor nodes |
| Reference Drift | ±2ppm/°C (C-grade) - guarantees <±0.15mV reference shift over 0°C–70°C operating range |
Pinout & Package
Package: 12-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 13), rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V; sets ADC full-scale range; requires 0.1µF bypass to GND for stability |
| COMP (2) | Reference compensation | Connects to same 0.1µF capacitor as REFOUT to control reference startup time and noise |
| A0 (3) | I²C address select | Configures slave address: 0010100 (GND) or 1010100 (VCC); enables dual-device bus sharing |
| GND (4,7,11,13) | Ground return | Multiple ground pins including exposed pad - mandatory low-impedance PCB ground plane connection |
| SCL (5) | I²C clock input | Accepts up to 400kHz clock; device acts only as I²C slave; no internal clock generation |
| SDA (6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit result MSB-first on SCL falling edges |
| REF– (8) | Reference negative input | Tied to system ground or sensor ground sense point; defines zero-input level for ADC |
| IN (9) | Analog input (single-ended) | 0V to VREF input range; accepts DC or slowly varying signals; no polarity inversion |
| GND (10) | Input ground reference | Dedicated ground return for IN pin; improves PSRR and reduces common-mode coupling |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing for clean reference and conversion performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.25V reference | Eliminates external reference IC and associated layout complexity while maintaining 2ppm/°C drift |
| Selectably programmable output rate | 208sps or 833sps via SPD bit - balances resolution, speed, and power without firmware changes |
| Single-cycle conversion with auto shutdown | Removes need for external timing control or polling; simplifies multiplexed multi-channel designs |
| Ultra-low input sampling current | 50nA average - allows direct use of simple RC filters (e.g., 1kΩ/0.1µF) with <1LSB error |
| 200nA deep sleep mode | Enables microamp-level system standby; reference and ADC both powered down until next I²C access |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Measuring temperature, humidity, or gas concentration using resistive or voltage-output sensors in unattended field deployments. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned sensor outputs; provides stable 1.25V reference and low-noise conversion at 208sps for high-resolution logging. Use Value: Eliminates external reference and calibration; 2µA sleep current extends battery life to >5 years in periodic-read configurations. | Use Scenario: Monitoring pressure, flow, or level transmitters in PLC-connected factory equipment with limited board space. IC Role / Device Role / Timing Role: Embedded ADC front-end for analog signal conditioning; interfaces directly to 4–20mA loop receivers or bridge sensors via simple RC filtering. Use Value: 50nA input current enables passive RC anti-aliasing without op-amp buffering; 3.5mA active current supports real-time control loop updates. |
| Embedded ADC Upgrades | Direct Temperature Measurements |
Use Scenario: Replacing legacy 12-bit or uncalibrated ADCs in existing designs to improve accuracy without PCB redesign. IC Role / Device Role / Timing Role: Pin-compatible upgrade path (DFN-12) offering 16-bit resolution, integrated reference, and I²C interface - no new routing needed. Use Value: Delivers ±1mV offset and ±0.01% gain error out-of-box, reducing or eliminating factory calibration steps. | Use Scenario: Digitizing thermistor or RTD voltage outputs in medical devices or HVAC controllers where self-heating must be minimized. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC capturing slow-varying thermal signals; uses internal reference to avoid drift-induced measurement error. Use Value: 2ppm/°C reference drift ensures <±0.05°C equivalent error over 0°C–70°C - critical for Class I clinical accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IRUGR | 4-channel differential input; no integrated reference; requires external 2.048V or 4.096V reference | Better suited for multi-sensor systems needing channel multiplexing; higher input leakage (±15nA) | Choose when measuring ≥2 differential signals and external reference is already present |
| MCP3424-E/SL | 18-bit resolution; fixed 15SPS/60SPS/240SPS/960SPS rates; ±2ppm/°C reference; 14-lead SOIC package | Higher resolution but slower max rate; larger footprint; lacks programmable sleep mode | Choose when absolute precision > speed, and board area permits SOIC packaging |
Compared with ADS1115IRUGR and MCP3424-E/SL, the LTC2471CDD#TRPBF uniquely combines integrated 1.25V reference, ultra-low 50nA input current, and 200nA sleep current in a 3mm × 3mm DFN - making it optimal for space- and power-constrained single-sensor nodes requiring minimal BOM count.
Availability
LTC2471CDD#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded ADC upgrades requiring stable component supply, long-term lifecycle support, and guaranteed C-grade temperature compliance.
Supply support for LTC2471CDD#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 LTC2471CDD#TRPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in space-constrained and battery-operated systems.
FAQ
What is the operating temperature range of the LTC2471CDD#TRPBF?
The LTC2471CDD#TRPBF is specified for the commercial temperature range of 0°C to 70°C. This C-grade rating is confirmed in the Absolute Maximum Ratings table and Order Information section of the official datasheet, and applies to both the LTC2471CDD#TRPBF and its counterpart LTC2471CDD#PBF in the 12-lead DFN package.
Does the LTC2471CDD#TRPBF require an external crystal or clock source?
No, the LTC2471CDD#TRPBF does not require an external crystal or clock source. It integrates a precision internal oscillator that supports both 208sps and 833sps output rates without any external timing components - a key feature explicitly stated in the Features and Applications Information sections of the datasheet.
How is the I²C address configured on the LTC2471CDD#TRPBF?
The LTC2471CDD#TRPBF I²C address is set via the A0 pin (Pin 3): tying A0 to GND selects address 0010100 (0x24), and tying A0 to VCC selects address 1010100 (0x54). This dual-address capability allows two LTC2471CDD#TRPBF devices to coexist on the same I²C bus, as documented in the Pin Functions and I²C Interface sections.
What is the maximum sleep current of the LTC2471CDD#TRPBF?
The maximum sleep current of the LTC2471CDD#TRPBF is 2µA, measured when both the ADC and integrated reference are powered down (SLP = 1). This value is specified in the Electrical Characteristics table under "ICC Sleep" and is guaranteed over the full 0°C to 70°C operating temperature range.
Can the LTC2471CDD#TRPBF measure negative input voltages?
No, the LTC2471CDD#TRPBF is a single-ended ADC with a 0V to VREF input range. It cannot measure negative voltages relative to GND. For differential or bipolar input capability, the pin-compatible LTC2473 variant (e.g., LTC2473CDD#TRPBF) must be used - a distinction clearly defined in the Description, Features, and Pin Configuration sections.
LTC2471CDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 833
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- I2C
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2471CDD#TRPBF FAQ
1.How can I place an order for LTC2471CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2471CDD#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 LTC2471CDD#TRPBF reliable?
The price and inventory of LTC2471CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2471CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2471CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2471CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2471CDD#TRPBF?
LTC2471CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2471CDD#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 LTC2471CDD#TRPBF?
For technical support, including LTC2471CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2471CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2471CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2471CDD#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 LTC2471CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2471CDD#TRPBF?
All LTC2471CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2471CDD#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 LTC2471CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2471CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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