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Analog Devices Inc. LTC2472IDD#PBF
- Part No.:
- LTC2472IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2472IDD#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:604
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Product details
Overview
LTC2472IDD#PBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, differential ±VREF input range, and user-selectable 208sps/833sps output rate. It operates from 2.7V to 5.5V, features SPI interface, and delivers 2ppm/°C reference drift, ±1mV offset error, and 0.01% gain error - ideal for high-accuracy industrial sensor signal conditioning.
For engineers reviewing the LTC2472IDD#PBF datasheet, LTC2472IDD#PBF pinout, LTC2472IDD#PBF application, or LTC2472IDD#PBF equivalent, key selection criteria include its differential input architecture, ultra-low 2µA sleep current, single-cycle conversion settling, internal oscillator, and compatibility with multiplexed sensor arrays requiring no latency or external clocking.
Technical Context
The LTC2472IDD#PBF implements a proprietary delta-sigma modulator with sinc³ decimation filtering and oversampling ratios of 8,192 (208sps) or 2,048 (833sps), enabling relaxed anti-aliasing filter requirements. Its differential input stage accepts ±1.25V full-scale signals referenced to REF–, supporting true bipolar measurement without level-shifting.
Conversion control is fully managed via SPI: CS initiates data transfer, SCK clocks 16-bit serial output (MSB-first), and SDI accepts 4-bit configuration commands (SPD/SLP bits) during the DATA INPUT/OUTPUT state. The internal reference powers up in 12ms (with 0.1µF COMP/REFOUT caps) and supports automatic shutdown after conversion when SLP = 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit direct binary output - delivers 65,536 discrete codes for high dynamic range measurements. |
| Input Configuration | Differential (±VREF) - enables rejection of common-mode noise in noisy industrial environments. |
| Reference Accuracy | 1.247V to 1.253V (±0.1% initial), 2ppm/°C max drift - ensures stable full-scale calibration across –40°C to +85°C. |
| Offset Error | ±1mV (typ) - limits zero-scale uncertainty to <0.08% of full-scale at 1.25V reference. |
| Gain Error | ±0.01% of FS - maintains linearity accuracy critical for calibrated transducer interfaces. |
| Supply Current | 3.5mA (typ) during conversion; 2µA (max) in sleep mode - enables battery-powered remote sensing. |
| Conversion Time | 4.0ms (208sps) or 1.0ms (833sps) - supports deterministic timing for time-triggered acquisition systems. |
Pinout & Package
Package: 12-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 13), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V precision voltage source; must be bypassed with ≤0.1µF capacitor to GND for stability. |
| COMP (2) | Reference compensation | Connects to 0.1µF capacitor to GND; sets reference startup time and transition noise performance. |
| 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 command (EN1/EN2/SPD/SLP) to configure output rate and sleep mode during data readback. |
| SCK (5) | Serial clock input | Drives synchronous SPI interface; supports up to 2MHz; falling edge clocks out each data bit on SDO. |
| SDO (6) | Serial data output | 3-state output delivering 16-bit MSB-first result; high-impedance when CS is high. |
| GND (7,11,13) | Ground terminals | Three dedicated ground pins + exposed pad - ensure low-impedance return path for analog/digital/reference sections. |
| REF– (8) | Negative reference input | Sets zero-input point; tied directly to system ground or sensor ground sense for accurate differential measurement. |
| IN+ (9) | Positive differential input | Accepts signal up to VREF; paired with IN– for true differential measurement with common-mode rejection. |
| IN– (10) | Negative differential input | Accepts signal down to 0V; complements IN+ to define full-scale range as (IN+ – IN–) = ±VREF. |
| VCC (12) | Positive supply | 2.7V–5.5V input; requires local 10µF + 0.1µF bypassing to minimize supply noise coupling into reference/ADC. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma architecture | Delivers one valid 16-bit result per conversion cycle with zero filter settling delay - eliminates dead-time in multiplexed sensor systems. |
| Proprietary input sampling scheme | Reduces average input current to 50nA - allows direct connection of RC antialiasing filters (e.g., 1kΩ/0.1µF) with <1LSB error. |
| Auto power-down sequencing | ADC shuts down automatically post-conversion; reference can be disabled via SLP bit to achieve 2µA total sleep current. |
| Internal oscillator | Eliminates need for external crystal or clock source - reduces BOM count and PCB area in space-constrained designs. |
| Single-cycle conversion settling | Guarantees full 16-bit accuracy within one conversion period (4ms or 1ms) - simplifies timing control in real-time systems. |
Applications
| Industrial Process Transmitter | High-Accuracy Temperature Monitoring |
|---|---|
|
Use Scenario: Digitizing 4–20mA loop-powered RTD or thermocouple signals in hazardous-area field instruments. IC Role / Device Role / Timing Role: Differential ADC front-end with integrated reference provides ratiometric measurement against sensor excitation, rejecting supply and lead-wire variations. Use Value: ±1mV offset and 2ppm/°C reference drift enable <0.1°C temperature resolution over –40°C to +85°C ambient without recalibration. |
Use Scenario: Direct digitization of platinum RTD (PT100/PT1000) bridges in HVAC and environmental control units. IC Role / Device Role / Timing Role: Precision differential converter measures bridge voltage drop with matched input impedance, minimizing self-heating errors. Use Value: 50nA input current allows use of high-value bridge excitation resistors, reducing self-heating to <0.01°C in PT1000 configurations. |
| Programmable Logic Controller (PLC) Analog Input Module | Portable Battery-Powered Data Logger |
|
Use Scenario: Multiplexed acquisition of multiple 0–10V or ±10V industrial sensor outputs in modular I/O chassis. IC Role / Device Role / Timing Role: Low-latency ADC with auto-shutdown enables rapid channel scanning while maintaining thermal stability across channels. Use Value: Single-cycle settling and SPI interface allow deterministic 1ms per channel at 833sps - achieving 100+ channels/sec scan rate with no inter-channel ghosting. |
Use Scenario: Long-term environmental logging (temperature, humidity, pressure) using coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Ultra-low-power ADC with configurable sleep mode minimizes quiescent consumption between scheduled measurements. Use Value: 2µA sleep current extends 250mAh coin-cell life to >3 years at 1-sample-per-minute duty cycle with microcontroller wake-up coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit resolution, 2.5V internal reference (5ppm/°C), SPI interface, no integrated oscillator - requires external clock. | Better resolution but higher power (350µA active); suited for lab-grade instrumentation vs. industrial field sensors. | Choose ADS124S08IPW when 24-bit resolution and programmable gain amplifier (PGA) are required; avoid if board space or external clocking is constrained. |
| MAX11206ETL+ | 18-bit resolution, 1.25V reference (10ppm/°C), I²C interface, 1.8–3.6V supply only - incompatible with 5V systems. | Lower supply range and I²C interface simplify microcontroller integration but limit use in 5V PLC or transmitter designs. | Choose MAX11206ETL+ for low-voltage portable devices with I²C masters; avoid for 5V industrial systems or SPI-only host architectures. |
Compared with ADS124S08IPW and MAX11206ETL+, the LTC2472IDD#PBF offers optimal balance of 16-bit precision, ultra-low sleep current, integrated oscillator, and 2.7–5.5V flexibility - making it uniquely suited for cost-sensitive, space-constrained industrial sensor nodes requiring guaranteed single-cycle accuracy.
Availability
LTC2472IDD#PBF is available at Aetrix Electronics and suitable for industrial process transmitters, high-accuracy temperature monitoring, and portable battery-powered data loggers requiring stable component supply across extended temperature ranges.
Supply support for LTC2472IDD#PBF 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 LTC2472IDD#PBF belongs to the LTC® precision delta-sigma ADC family, designed specifically for industrial sensor signal conditioning where low power, integrated reference stability, and no-latency conversion are mandatory.
FAQ
What is the operating temperature range of the LTC2472IDD#PBF?
The LTC2472IDD#PBF is specified for –40°C to +85°C operation, matching the "I" grade designation in its part number. This extended range supports deployment in harsh industrial environments such as factory floors, outdoor metering, and automotive under-hood sensing where ambient temperatures exceed commercial-grade limits.
Does the LTC2472IDD#PBF require an external clock source?
No, the LTC2472IDD#PBF includes a fully integrated oscillator and requires no external clock components. This eliminates timing component count and layout sensitivity, simplifying design for compact sensor modules and reducing risk of clock-related EMI or jitter-induced measurement errors in the LTC2472IDD#PBF.
How does the LTC2472IDD#PBF achieve ultra-low input current?
The LTC2472IDD#PBF uses a proprietary input sampling architecture that reduces average input current to 50nA - several orders of magnitude lower than conventional delta-sigma ADCs. This enables direct interfacing with RC antialiasing filters (e.g., 1kΩ/0.1µF) without introducing significant measurement error in the LTC2472IDD#PBF.
Can the LTC2472IDD#PBF operate from a 3.3V supply?
Yes, the LTC2472IDD#PBF supports supply voltages from 2.7V to 5.5V, including standard 3.3V rails. At 3.3V, it maintains full 16-bit performance, 2ppm/°C reference drift, and 3.5mA typical conversion current - making it compatible with modern low-voltage microcontrollers and isolated power domains in the LTC2472IDD#PBF.
What is the function of the COMP pin on the LTC2472IDD#PBF?
The COMP pin on the LTC2472IDD#PBF connects to a 0.1µF capacitor to ground and controls internal reference stability and startup behavior. It determines reference turn-on time (12ms typical) and transition noise - undersizing this capacitor reduces startup time but increases RMS noise, directly impacting measurement repeatability in the LTC2472IDD#PBF.
LTC2472IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2472IDD#PBF FAQ
1.How can I place an order for LTC2472IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2472IDD#PBF 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 LTC2472IDD#PBF reliable?
The price and inventory of LTC2472IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2472IDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2472IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2472IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2472IDD#PBF?
LTC2472IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2472IDD#PBF 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 LTC2472IDD#PBF?
For technical support, including LTC2472IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2472IDD#PBF requirements.
6.How does Aetrix verify that LTC2472IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2472IDD#PBF 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 LTC2472IDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2472IDD#PBF?
All LTC2472IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2472IDD#PBF, 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 LTC2472IDD#PBF part is unused and in its original packaging.
Return procedure for LTC2472IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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