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Analog Devices Inc. LTC2473CMS#TRPBF
- Part No.:
- LTC2473CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2473CMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,128
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Product details
Overview
LTC2473CMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit differential ΔΣ analog-to-digital converter with integrated 1.25V precision reference, I²C 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 LTC2473CMS#TRPBF datasheet, LTC2473CMS#TRPBF pinout, LTC2473CMS#TRPBF application, or LTC2473CMS#TRPBF equivalent, key selection criteria include its differential input range (±VREF), 2µA max sleep current, 12-lead MSOP package, and guaranteed 2ppm/°C reference drift over 0°C to 70°C.
Technical Context
The LTC2473CMS#TRPBF implements a delta-sigma architecture with oversampling ratios of 8,192 (208sps) or 2,048 (833sps), enabling relaxed anti-aliasing filter requirements. Its proprietary input sampling scheme limits average input current to 50nA, minimizing loading on external signal conditioning networks.
It features single-cycle conversion settling, auto-power-down after conversion, and configurable sleep mode that powers down both ADC and reference-reducing supply current to ≤2µA. The internal oscillator eliminates external timing components, and I²C communication supports standard/fast-mode up to 400kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct codes for high-fidelity sensor data capture |
| Input Type | Differential (±VREF) - rejects common-mode noise and enables bipolar signal measurement |
| Reference Accuracy | 1.247V to 1.253V (±0.1% initial) - sets full-scale input range without external reference |
| Reference Drift | ±2 ppm/°C (C-grade) - ensures stable scaling across 0°C to 70°C operating range |
| Supply Current | 3.5mA typical during conversion - enables low-power operation in battery-backed systems |
| Sleep Current | ≤2 µA maximum - supports ultra-low-power wake-on-event architectures |
| I²C Speed | Up to 400 kHz - compatible with fast-mode microcontrollers without timing margin concerns |
Pinout & Package
Package: 12-lead MSOP (3mm × 3mm), exposed pad not present (unlike DFN variant); RoHS-compliant, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (Pin 1) | Reference output | Nominally 1.25V precision voltage source; must be decoupled with ≤0.1µF capacitor to GND |
| COMP (Pin 2) | Reference compensation | Stabilizes internal reference; requires 0.1µF capacitor to GND matching REFOUT cap value |
| A0 (Pin 3) | I²C address select | Configures slave address: 0010100 (A0 = GND) or 1010100 (A0 = VCC) |
| GND (Pins 4, 7, 11) | Ground return | Three dedicated ground pins reduce ground bounce and improve PSRR |
| SCL (Pin 5) | I²C clock input | Slave-only interface; accepts external clock up to 400kHz; no internal clock generation |
| SDA (Pin 6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit result MSB-first on SCL falling edges |
| REF– (Pin 8) | Negative reference input | Sets zero-input point; tied directly to system ground or sensor ground sense node |
| IN+ (Pin 9) | Positive differential input | Accepts voltage up to VREF; used with IN– for true differential measurement |
| IN– (Pin 10) | Negative differential input | Accepts voltage down to 0V; complements IN+ for ±VREF input range |
| VCC (Pin 12) | Supply voltage | 2.7V–5.5V operation; requires 10µF + 0.1µF parallel bypassing at pin |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | One-to-one correspondence between conversion completion and I²C data availability - eliminates filter settling delays in multiplexed sensor systems |
| Ultra-low input current | Average 50nA sampling current - allows direct connection to RC filters (e.g., 1kΩ/0.1µF) with <1 LSB error |
| Auto power-down | ADC powers down automatically post-conversion; optional reference shutdown reduces sleep current to ≤2µA |
| Integrated oscillator | No external crystal or clock required - simplifies BOM and layout while ensuring consistent oversampling ratio |
| Relaxed anti-aliasing | Oversampling ratio of 8,192 (208sps) or 2,048 (833sps) - permits simple first-order RC filtering instead of complex active filters |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Measuring temperature, humidity, and gas concentration using bridge-based or ratiometric sensors in unattended field deployments. IC Role / Device Role / Timing Role: Differential ADC digitizing low-level sensor outputs with high CMRR and minimal self-heating error. Use Value: 16-bit resolution and ±2 ppm/°C reference stability ensure long-term calibration retention without periodic recalibration. |
Use Scenario: Closed-loop control of pressure, flow, or level in PLC-connected instrumentation with 4–20mA or voltage inputs. IC Role / Device Role / Timing Role: High-accuracy front-end ADC interfacing to isolated analog inputs via precision op-amps. Use Value: Differential input range (±1.25V) and 50nA input current enable direct connection to low-output-impedance signal chains. |
| Data Acquisition Systems | Embedded ADC Upgrades |
|
Use Scenario: Multi-channel, low-power DAQ modules for predictive maintenance in edge computing gateways. IC Role / Device Role / Timing Role: I²C-configurable ADC providing synchronized sampling across multiple sensors with minimal MCU overhead. Use Value: Selectable 208sps/833sps rates and auto-shutdown simplify firmware design while maintaining deterministic latency. |
Use Scenario: Replacing legacy 12-bit ADCs in existing designs to improve resolution without PCB redesign. IC Role / Device Role / Timing Role: Pin-compatible upgrade path (MSOP-12) delivering 4× higher resolution and integrated reference. Use Value: Eliminates need for external reference and reduces total component count by three (ref + buffer + filter). |
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, 860sps, single-ended/differential, but uses external reference and lacks integrated oscillator | Requires external 2.048V reference and clock source; higher system-level BOM cost and layout complexity | Choose when needing higher sample rate and external reference flexibility, accepting added design effort |
| MCP3424-E/SL | 18-bit, 15sps/3.75sps, differential, internal 2.048V reference (±15 ppm/°C), no I²C speed option above 3.4MHz | Slower conversion rate and higher reference drift limit use in wide-temperature industrial environments | Prefer for ultra-high-resolution static measurements where speed and thermal stability are secondary |
Compared with ADS1115IDGSR and MCP3424-E/SL, the LTC2473CMS#TRPBF uniquely combines integrated 1.25V reference (±2 ppm/°C), no-external-clock operation, and 2µA sleep current-making it optimal for compact, thermally stable, battery-conscious sensor nodes.
Availability
LTC2473CMS#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded data acquisition requiring stable component supply, long-lifecycle support, and guaranteed C-grade temperature performance (0°C to 70°C).
Supply support for LTC2473CMS#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 acquired Linear Technology in 2017 and maintains its high-precision analog IC portfolio, emphasizing metrology-grade performance, low-power innovation, and robust industrial reliability.
The LTC2473CMS#TRPBF belongs to Linear's precision delta-sigma ADC family, designed specifically for high-accuracy, low-power sensor interface applications where integrated reference stability and simplified system integration are critical.
FAQ
What is the operating temperature range for the LTC2473CMS#TRPBF?
The LTC2473CMS#TRPBF is rated for 0°C to 70°C (C-grade). This is confirmed in the "Order Information" table of the datasheet, where "CMS" denotes the MSOP package with commercial temperature range. It is not rated for extended industrial (–40°C to 85°C) operation-those variants use "IMS" suffix (e.g., LTC2473IMS#TRPBF).
Does the LTC2473CMS#TRPBF require an external clock source?
No, the LTC2473CMS#TRPBF does not require an external clock source. It includes an integrated oscillator, as explicitly stated in the "Features" list and "Block Diagram." This eliminates the need for crystals, oscillators, or clock distribution circuitry-reducing BOM count and layout area.
How does the LTC2473CMS#TRPBF achieve its 2µA sleep current specification?
The LTC2473CMS#TRPBF achieves ≤2µA sleep current by powering down both the ADC core and the integrated reference when the SLP bit is set high. This dual-shutdown mode is documented in the "Applications Information" section and verified in the Electrical Characteristics table under "Sleep" current (max 2µA).
Can the LTC2473CMS#TRPBF measure negative input voltages relative to ground?
Yes-the LTC2473CMS#TRPBF supports true differential input with ±VREF range (±1.25V). When VIN– is tied to a bias voltage (e.g., 1.25V), VIN+ can swing below that level, enabling measurement of bipolar signals. This is defined in the "Analog Inputs" table and "Input Voltage Range (LTC2473)" section.
What is the function of the COMP pin on the LTC2473CMS#TRPBF?
The COMP pin (Pin 2) provides internal compensation for the integrated reference. It must be connected to a 0.1µF capacitor to GND-matching the REFOUT capacitor-to ensure low-noise operation and stable reference startup. This requirement is specified in both the "Pin Functions" and "Typical Application" schematic.
LTC2473CMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- 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:
- 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2473CMS#TRPBF FAQ
1.How can I place an order for LTC2473CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2473CMS#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 LTC2473CMS#TRPBF reliable?
The price and inventory of LTC2473CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2473CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2473CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2473CMS#TRPBF transactions.
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4.How is shipping managed for LTC2473CMS#TRPBF?
LTC2473CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2473CMS#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 LTC2473CMS#TRPBF?
For technical support, including LTC2473CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2473CMS#TRPBF requirements.
6.How does Aetrix verify that LTC2473CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2473CMS#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 LTC2473CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2473CMS#TRPBF?
All LTC2473CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2473CMS#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 LTC2473CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2473CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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