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Analog Devices Inc. LTC2472CDD#TRPBF
- Part No.:
- LTC2472CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2472CDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,399
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Product details
Overview
LTC2472CDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit differential ΔΣ ADC with integrated 1.25V precision reference, SPI interface, and selectable 208sps/833sps output rate. It operates from 2.7V to 5.5V, delivers ±1 mV offset error and 0.01% gain error, and targets high-accuracy sensor digitization in industrial monitoring systems.
For engineers reviewing the LTC2472CDD#TRPBF datasheet, LTC2472CDD#TRPBF pinout, LTC2472CDD#TRPBF application, or LTC2472CDD#TRPBF equivalent, key selection criteria include differential input range (±VREF), 2μA max sleep current, 3.5mA typical conversion supply current, internal oscillator, and DFN-12 (3mm × 3mm) package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2472CDD#TRPBF uses a proprietary ΔΣ architecture with oversampling ratios of 8,192 (208sps) or 2,048 (833sps), enabling relaxed anti-aliasing filter requirements. Its input sampling scheme reduces average input current to 50nA, minimizing external RC filter error.
It implements a three-state operation cycle-CONVERT, SLEEP/NAP, and DATA INPUT/OUTPUT-with automatic power-down after conversion. Reference startup time is 12ms (with 0.1µF COMP/REFOUT capacitors), and the device supports CPOL = 0 or 1 SPI timing modes without latency between conversion completion and data availability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit direct binary output - delivers 65,536 distinct codes for high-fidelity signal capture |
| Input Type | Differential (±VREF range) - rejects common-mode noise and enables bipolar sensor interfacing |
| Reference Output | 1.25V ±3mV (1.247V–1.253V), 2ppm/°C max drift - eliminates need for external reference in precision systems |
| Output Rate | User-selectable 208sps or 833sps - balances speed vs. noise performance without firmware changes |
| Supply Current | 3.5mA typ during conversion; 2μA max in sleep mode - enables battery-powered or ultra-low-power monitoring |
| Integral Nonlinearity | ±2 LSB max at 208sps - ensures monotonicity and accuracy across full-scale range |
| Offset Error | ±1 mV max - minimizes zero-point calibration burden in sensor front-ends |
| SPI Interface | 4-wire, CPOL configurable, 2MHz max SCK - interoperates with standard microcontroller peripherals |
Pinout & Package
Package: 12-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 13), RoHS-compliant, operating temperature range 0°C to 70°C (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V reference voltage source; must be decoupled with ≤0.1µF capacitor to GND |
| COMP (2) | Reference compensation | Stabilizes internal reference; requires 0.1µF capacitor to GND for optimal noise and startup behavior |
| CS (3) | Chip select (active low) | Enables SDO output and initiates DATA INPUT/OUTPUT state; rising edge aborts transfer and starts new conversion |
| SDI (4) | Serial data input | Accepts 4-bit programming word (EN1/EN2/SPD/SLP) to configure output rate and sleep mode |
| SCK (5) | Serial clock input | Controls data timing; supports idle-high (CPOL=1) or idle-low (CPOL=0) modes up to 2MHz |
| SDO (6) | Serial data output | 3-state output delivering 16-bit MSB-first result; valid after CS low, synchronized to SCK falling edges |
| GND (7, 11, 13) | Ground terminals | Three dedicated ground pins + exposed thermal pad - ensure low-impedance return path and thermal dissipation |
| REF– (8) | Negative reference input | Sets zero-input point; tied directly to system ground or sensor ground sense point |
| IN+ (9) | Positive differential input | Accepts high-side sensor signal; input leakage <±1nA enables direct RC filtering |
| IN– (10) | Negative differential input | Accepts low-side sensor signal; negligible leakage between IN+/IN– preserves CMRR |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires 10µF + 0.1µF parallel bypassing at pin for stable conversion performance |
Key Features
| Feature | Design Value |
|---|---|
| No-latency data output | Conversion result available immediately after completion - no filter settling delay or redundant samples required for multiplexed inputs |
| Ultra-low input sampling current | 50nA average - allows direct connection of 1kΩ/0.1µF RC filters with <1 LSB added error |
| Auto shutdown architecture | ADC powers down automatically post-conversion; reference can be disabled via SLP bit to reach 2μA total sleep current |
| Integrated oscillator | No external crystal or clock source needed - simplifies BOM and layout while ensuring consistent timing |
| Relaxed anti-aliasing | Oversampling ratio of 8,192 (208sps) or 2,048 (833sps) - reduces analog filter complexity and component count |
| Single-cycle operation | Full conversion + data read completes in one deterministic cycle - predictable timing for real-time control loops |
Applications
| Industrial Process Monitoring | Environmental Sensor Nodes |
|---|---|
Use Scenario: Continuous measurement of pressure, flow, or level transducers in factory automation PLCs. IC Role / Device Role / Timing Role: Differential ADC digitizing ratiometric bridge outputs with rejection of supply and EMI-induced common-mode noise. Use Value: 16-bit resolution and ±1 mV offset enable sub-0.1% full-scale accuracy without per-unit calibration. |
Use Scenario: Battery-powered air quality sensors logging temperature, humidity, and gas concentration over weeks. IC Role / Device Role / Timing Role: Low-power ADC acquiring conditioned analog signals while maintaining µA-level sleep current between readings. Use Value: 2μA max sleep current extends coin-cell life beyond 12 months at 1-sample-per-minute duty cycle. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
Use Scenario: Precision thermistor or RTD interfaces in medical diagnostic equipment requiring traceable accuracy. IC Role / Device Role / Timing Role: High-stability 1.25V reference and low-drift ADC core eliminating external reference drift as a dominant error source. Use Value: 2ppm/°C reference drift contributes <0.005°C error over 0°C–70°C range for Class A PT100 measurements. |
Use Scenario: Retrofitting legacy 12-bit SAR ADCs in test instrumentation to improve dynamic range without board redesign. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement offering 16-bit resolution, integrated reference, and SPI compatibility. Use Value: Eliminates external reference, op-amp buffer, and anti-aliasing components - reduces BOM cost by $1.20/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 16-bit, I²C interface, no integrated reference (requires external VREF), 860sps max, 150µA active current | Lower integration; suited for I²C-based microcontrollers where SPI is unavailable or congested | Select when bus protocol compatibility outweighs reference stability and ultra-low sleep current needs |
| MCP3424-E/ST | 18-bit, I²C, internal 2.048V reference (15ppm/°C), 15sps/3.75sps/1.875sps, 145µA active current, no sleep mode | Higher resolution but slower speed and higher power; lacks programmable output rate and deep sleep capability | Prefer for static, high-precision DC measurements where throughput and power are secondary |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2472CDD#TRPBF uniquely combines SPI interface, integrated 2ppm/°C reference, selectable 208/833sps rates, and 2μA sleep current - making it optimal for battery-operated, noise-sensitive, and space-constrained industrial sensing nodes requiring guaranteed monotonicity and minimal external components.
Availability
LTC2472CDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded instrumentation requiring stable component supply, long-term lifecycle support, and C-grade temperature compliance.
Supply support for LTC2472CDD#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 LTC2472CDD#TRPBF belongs to the Linear Technology ΔΣ ADC family designed specifically for precision, low-power, and easy-to-integrate sensor signal conditioning in industrial and instrumentation applications.
FAQ
What is the maximum operating temperature range for the LTC2472CDD#TRPBF?
The LTC2472CDD#TRPBF is rated for 0°C to 70°C (C-grade). This is confirmed in the "Order Information" table and "Absolute Maximum Ratings" section of the datasheet. For extended temperature operation, the LTC2472IDD#TRPBF (–40°C to 85°C, I-grade) is the direct variant with identical functionality and pinout.
Does the LTC2472CDD#TRPBF require an external clock source?
No, the LTC2472CDD#TRPBF includes a fully integrated oscillator and requires no external clock components. This is explicitly stated in the "Features" list and "Block Diagram" - the internal oscillator enables standalone operation and eliminates timing component dependencies in the design.
How does the LTC2472CDD#TRPBF achieve its 2μA sleep current specification?
The LTC2472CDD#TRPBF reaches 2μA max sleep current by powering down both the ADC core and the internal 1.25V reference when the SLP bit is set high during the DATA INPUT/OUTPUT state. This dual-shutdown mode is detailed in the "Converter Operation" section and verified in the "Power Requirements" table under "Sleep" condition.
Can the LTC2472CDD#TRPBF interface directly with a thermocouple amplifier?
Yes - the LTC2472CDD#TRPBF's differential ±VREF input range, low input bias current (<1nA), and 16-bit resolution make it suitable for interfacing with thermocouple signal conditioners such as the AD8495. Its 2ppm/°C reference drift ensures cold-junction compensation accuracy remains uncompromised over temperature.
What is the conversion time for the LTC2472CDD#TRPBF at 833sps output rate?
At 833sps output rate (SPD = 1), the LTC2472CDD#TRPBF has a nominal conversion time of 1ms, with min/max values of 0.8ms/1.2ms across the full temperature range. This is specified in the "Timing Characteristics" table under parameter tCONV2 and applies to all operating conditions including VCC = 2.7V–5.5V.
LTC2472CDD#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:
- Differential
- Data Interface:
- SPI
- 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:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2472CDD#TRPBF FAQ
1.How can I place an order for LTC2472CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2472CDD#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 LTC2472CDD#TRPBF reliable?
The price and inventory of LTC2472CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2472CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2472CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2472CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2472CDD#TRPBF?
LTC2472CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2472CDD#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 LTC2472CDD#TRPBF?
For technical support, including LTC2472CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2472CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2472CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2472CDD#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 LTC2472CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2472CDD#TRPBF?
All LTC2472CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2472CDD#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 LTC2472CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2472CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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