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Analog Devices Inc. LTC2472CMS#PBF
- Part No.:
- LTC2472CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2472CMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:437
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Product details
Overview
LTC2472CMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, differential ±VREF input range, selectable 208sps/833sps output rate, and SPI interface - designed for high-accuracy sensor digitization in industrial monitoring systems.
For engineers reviewing the LTC2472CMS#PBF datasheet, LTC2472CMS#PBF pinout, LTC2472CMS#PBF application, or LTC2472CMS#PBF equivalent, key selection criteria include its 2ppm/°C reference drift, 1mV offset error, 0.01% gain error, single-cycle settling, and 2µA sleep current - all verified for the MSOP-12 package at 0°C to 70°C.
Technical Context
The LTC2472CMS#PBF implements a proprietary delta-sigma architecture with internal oscillator and no external timing components required. Its oversampling ratio is 8,192 at 208sps and 2,048 at 833sps, enabling relaxed anti-aliasing filter design while maintaining 16-bit resolution and <3µVRMS transition noise.
It operates from a single 2.7V–5.5V supply, supports SPI CPOL = 0 or 1 modes, and features automatic power-down after conversion. The reference startup time is 12ms (with 0.1µF COMP and REFOUT capacitors), and input sampling current is just 50nA - enabling direct RC filtering without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity analog measurement |
| Reference Output Voltage | 1.25V ±3mV - sets full-scale differential input range of ±1.25V with 2ppm/°C max drift (C-grade) |
| Offset Error | ±1mV - contributes ≤0.016% FS error at 1.25V full scale, critical for zero-point accuracy |
| Gain Error | ±0.01% of FS - ensures consistent scaling across temperature and supply voltage variations |
| Conversion Rate | Selectable 208sps or 833sps - enables trade-off between noise performance and update speed |
| Sleep Current | 2µA max - reduces system power during idle periods without losing configuration state |
| Supply Voltage Range | 2.7V to 5.5V - compatible with common industrial and battery-backed supply rails |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), exposed pad optional, rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (Pin 1) | Reference output | Nominally 1.25V precision voltage source; requires 0.1µF bypass to GND for stability and low noise |
| COMP (Pin 2) | Reference compensation | Connects to 0.1µF capacitor to GND to control reference startup time and transition noise |
| CS (Pin 3) | Chip select (active low) | Enables SDO output and initiates DATA INPUT/OUTPUT state; rising edge aborts transfer and starts new conversion |
| SDI (Pin 4) | Serial data input | Accepts 4-bit command (EN1/EN2/SPD/SLP) to configure output rate and sleep mode; can be tied to GND/VDD for fixed-rate operation |
| SCK (Pin 5) | Serial clock input | Drives SPI timing; supports CPOL = 0 or 1; falling edge clocks out data on SDO, rising edge latches SDI |
| SDO (Pin 6) | Serial data output | 3-state output delivering 16-bit MSB-first result; high-impedance when CS is high |
| GND (Pins 7, 11) | Ground | Primary analog/digital return path; multiple pins reduce ground impedance and improve PSRR |
| REF– (Pin 8) | Negative reference input | Sets zero-input level; must be connected to system ground or sensor ground sense point |
| IN+ (Pin 9) | Differential positive input | Accepts signal up to VREF; paired with IN– for true differential measurement rejecting common-mode noise |
| IN– (Pin 10) | Differential negative input | Accepts signal down to 0V; complements IN+ to enable ±1.25V input range with inherent CMRR |
| VCC (Pin 12) | Positive supply | 2.7V–5.5V input requiring local 10µF + 0.1µF bypassing for stable ADC and reference operation |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma conversion | Single-cycle settling with one-to-one correspondence between conversion and output - eliminates multiplexing delay compensation |
| Integrated 1.25V reference | 2ppm/°C max drift and 0.1% initial accuracy - removes need for external reference and associated layout complexity |
| Ultra-low input sampling current | 50nA average - allows direct connection of RC filters (e.g., 1kΩ + 0.1µF) with <1 LSB added error |
| Configurable power states | Auto NAP (ADC off, ref on) or user-triggered SLEEP (ADC + ref off → 2µA) - enables adaptive power management |
| Internal oscillator | No external crystal or clock required - simplifies BOM and PCB layout while ensuring consistent timing |
Applications
| Industrial Process Monitoring | Environmental Sensor Interface |
|---|---|
Use Scenario: Digitizing outputs from strain gauges, RTDs, and load cells in PLC analog input modules. IC Role / Device Role / Timing Role: Differential ADC with integrated reference provides ratiometric measurement against sensor excitation, eliminating reference drift impact. Use Value: 16-bit resolution and <3µVRMS noise support 0.1°C RTD accuracy; 2µA sleep current extends battery life in wireless node variants. |
Use Scenario: Reading thermistor, humidity, and gas sensor bridges in environmental monitoring nodes. IC Role / Device Role / Timing Role: High-PSRR (80dB DC) and low input current enable direct bridge interface without buffer amplifiers. Use Value: 50nA input sampling current avoids loading high-impedance sensors; 208sps mode achieves <100nV/√Hz effective noise density for sub-millivolt signals. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
Use Scenario: Cold-junction compensation and thermocouple voltage digitization in industrial temperature controllers. IC Role / Device Role / Timing Role: Differential input rejects EMI from heater switching; integrated reference ensures stable cold-junction reference. Use Value: ±1mV offset error and 0.01% gain error maintain ±0.5°C absolute accuracy over 0°C–70°C operating range. |
Use Scenario: Replacing legacy 12-bit SAR ADCs in existing designs to improve resolution without changing firmware or layout. IC Role / Device Role / Timing Role: Pin-compatible with LTC2470 (single-ended) and software-compatible SPI protocol simplify migration. Use Value: Same MSOP-12 footprint and identical register map allow drop-in upgrade to 16-bit resolution and integrated reference. |
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 2.048V ref), 860sps max, 150nA input bias | Requires external reference and level-shifting for 5V systems; lacks SPI compatibility and auto-shutdown | Choose for I²C-based microcontrollers where bus simplicity outweighs reference integration and power efficiency |
| LTC2471CMS#PBF | Same family, single-ended input (0V to VREF), identical reference, package, and timing - differs only in IN+/IN– vs IN/GND pin mapping | Used where unipolar sensor outputs (e.g., 4–20mA receivers) eliminate need for differential rejection | Choose when redesigning for single-ended sources; shares same layout, firmware, and supply chain with LTC2472CMS#PBF |
Compared with ADS1115IDGSR and LTC2471CMS#PBF, the LTC2472CMS#PBF uniquely combines differential input, integrated 2ppm/°C reference, SPI interface, and 2µA sleep current in an MSOP-12 package - making it optimal for space-constrained, low-power industrial sensing where common-mode noise rejection and reference stability are critical.
Availability
LTC2472CMS#PBF is available at Aetrix Electronics and suitable for industrial process monitoring, environmental sensor interface, direct temperature measurement, and embedded ADC upgrade applications requiring stable component supply across production lifecycles.
Supply support for LTC2472CMS#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 acquired Linear Technology in 2017 and maintains its high-precision analog IC portfolio, emphasizing metrology-grade performance, low power, and system-level integration.
The LTC2472CMS#PBF belongs to Linear's precision delta-sigma ADC product line, engineered specifically for high-accuracy, low-power sensor digitization in industrial, instrumentation, and environmental monitoring systems.
FAQ
What is the reference voltage specification for LTC2472CMS#PBF?
The LTC2472CMS#PBF features an integrated 1.25V reference with ±3mV initial tolerance (1.247V to 1.253V), 2ppm/°C maximum temperature coefficient (C-grade), and 30nV/√Hz output noise density at 1ksps. This reference sets the full-scale differential input range of ±1.25V and is internally compensated via the COMP pin.
Does LTC2472CMS#PBF support both 208sps and 833sps output rates?
Yes, the LTC2472CMS#PBF supports user-selectable output rates of 208sps (oversampling ratio 8,192) and 833sps (oversampling ratio 2,048) via the SPD bit in the SDI programming command. These rates are also configurable by tying SDI to GND (208sps) or VDD (833sps), though sleep mode is disabled in that configuration.
What is the power consumption of LTC2472CMS#PBF in sleep mode?
In sleep mode - where both the ADC and integrated reference are powered down - the LTC2472CMS#PBF draws a maximum of 2µA supply current. This is confirmed across the full 0°C to 70°C operating range and enables ultra-low-power operation in battery-powered sensing nodes.
Can LTC2472CMS#PBF interface directly with high-impedance sensors?
Yes, the LTC2472CMS#PBF draws only 50nA average input sampling current and exhibits negligible leakage between IN+ and IN–. This allows direct connection of RC filters (e.g., 1kΩ + 0.1µF) with <1 LSB added error, making it suitable for thermistors, bridge sensors, and other high-Z sources without buffer amplifiers.
Is LTC2472CMS#PBF pin-compatible with other devices in the LTC247x family?
The LTC2472CMS#PBF shares the same MSOP-12 pinout and SPI register map with LTC2470CMS#PBF (single-ended) and LTC2471CMS#PBF (single-ended variant), enabling layout reuse. However, IN+ and IN– pins differ from IN and GND pins in the single-ended versions - requiring minor trace routing changes for differential operation.
LTC2472CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2472CMS#PBF FAQ
1.How can I place an order for LTC2472CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2472CMS#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 LTC2472CMS#PBF reliable?
The price and inventory of LTC2472CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2472CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2472CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2472CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2472CMS#PBF?
LTC2472CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2472CMS#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 LTC2472CMS#PBF?
For technical support, including LTC2472CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2472CMS#PBF requirements.
6.How does Aetrix verify that LTC2472CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2472CMS#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 LTC2472CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2472CMS#PBF?
All LTC2472CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2472CMS#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 LTC2472CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2472CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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