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Analog Devices Inc. LTC2473IMS#TRPBF
- Part No.:
- LTC2473IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2473IMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,429
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Product details
Overview
LTC2473IMS#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, draws 3.5mA typical supply current during conversion, and achieves ±1mV offset error and ±0.01% gain error - enabling high-accuracy sensor digitization in industrial monitoring systems.
For engineers reviewing the LTC2473IMS#TRPBF datasheet, LTC2473IMS#TRPBF pinout, LTC2473IMS#TRPBF application, or LTC2473IMS#TRPBF equivalent, key selection criteria include its differential input range (±VREF), 2μA max sleep current, 2ppm/°C reference drift (I-grade), 12-lead MSOP package, and single-cycle settling for multiplexed sensor arrays.
Technical Context
The LTC2473IMS#TRPBF implements a delta-sigma architecture with a 2048× oversampling ratio at 833sps and 8192× at 208sps, relaxing anti-aliasing filter requirements. Its proprietary input sampling scheme limits average input current to 50nA, enabling direct RC filtering without significant error.
It features an internal oscillator, auto-shutdown after conversion, and configurable sleep mode that powers down both ADC and reference - reducing supply current to ≤2μA. The I²C interface supports standard/fast mode (≤400kHz), with address selection via A0 pin (0010100 or 1010100).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = 38.1μV step size with 1.25V reference |
| Input Type | Differential (±VREF) - rejects common-mode noise in bridge or thermocouple sensing |
| Output Rate | Selectable 208sps or 833sps - balances speed vs. noise performance for system-level timing control |
| Reference Drift | ±5ppm/°C (I-grade) - ensures <±0.5mV full-scale drift over –40°C to +85°C operating range |
| Offset Error | ±1mV - enables sub-100μV absolute accuracy after calibration in precision instrumentation |
| Supply Current | 3.5mA typ (conversion), 2μA max (sleep) - supports battery-powered or energy-constrained deployments |
| I²C Address | 0010100 or 1010100 - allows dual-device addressing on same bus without external logic |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), exposed pad not present (unlike DFN variant); rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V; sets ADC full-scale range; requires 0.1μF capacitor to GND for stability |
| COMP (2) | Reference compensation | Connects 0.1μF capacitor to GND; controls reference startup time and transition noise |
| A0 (3) | I²C address select | GND = 0010100, VCC = 1010100; enables two devices per I²C bus |
| GND (4, 7, 11) | Ground return | Three dedicated ground pins minimize ground bounce in mixed-signal layouts |
| SCL (5) | I²C clock input | Accepts up to 400kHz clock; only slave device - no master capability |
| SDA (6) | I²C bidirectional data | Open-drain output; requires external 1.7kΩ pull-up to VCC |
| REF– (8) | Negative reference input | Typically tied to system ground or sensor low-side reference point |
| IN+ (9) | Differential positive input | Accepts voltage up to VREF; used with IN– for true differential measurement |
| IN– (10) | Differential negative input | Accepts voltage down to 0V; forms ±VREF input range with IN+ |
| VCC (12) | Positive supply | 2.7V–5.5V operation; bypass with 10μF + 0.1μF capacitors near pin |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | One-to-one correspondence between conversion completion and I²C data availability - eliminates buffer management in multiplexed sensor systems |
| Ultra-low input current | 50nA average sampling current - permits direct connection of RC filters (e.g., 1kΩ + 0.1μF) with <1 LSB error |
| Auto power-down | ADC powers down automatically post-conversion; reference remains active unless SLP bit is set - simplifies power sequencing |
| Integrated oscillator | No external crystal or clock required - reduces BOM count and layout area in space-constrained designs |
| Single-cycle settling | Full 16-bit result available after one conversion period (1.2ms or 4.8ms) - avoids settling delays in time-critical acquisition |
Applications
| Industrial Process Monitoring | Environmental Sensor Hub |
|---|---|
Use Scenario: Continuous logging of pressure, flow, and level transducers in PLC-connected field instruments. IC Role / Device Role / Timing Role: Differential ADC digitizing 4–20mA loop outputs or Wheatstone bridge signals with rejection of cable-induced common-mode noise. Use Value: ±1mV offset error and 2ppm/°C reference drift enable <0.1% FS accuracy over temperature without recalibration. | Use Scenario: Multi-node air quality station measuring CO₂, humidity, and particulate matter using analog-output sensors. IC Role / Device Role / Timing Role: Low-power ADC acquiring from multiple sensors via analog multiplexer; sleep mode reduces quiescent current to 2μA between readings. Use Value: 50nA input current allows passive RC filtering without loading sensor outputs, preserving signal integrity across diverse sensor types. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
Use Scenario: Cold-junction compensation and thermocouple linearization in portable test equipment. IC Role / Device Role / Timing Role: High-resolution differential front-end converting thermocouple mV outputs referenced to local cold-junction sensor. Use Value: 16-bit resolution and ±VREF input range resolve <100μV changes - sufficient for 0.1°C RTD or thermocouple resolution. | Use Scenario: Retrofitting legacy 12-bit microcontroller-based systems with higher-accuracy analog sensing capability. IC Role / Device Role / Timing Role: Drop-in I²C-compatible ADC replacing discrete op-amp + SAR solutions; retains existing firmware I²C stack. Use Value: Pin/software compatibility with LTC2471 allows shared PCB layout and driver code - minimizing redesign effort and validation cost. |
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, 2V–5.5V, 150μA sleep current, no integrated reference | Requires external reference; lower sleep current but higher active current (200μA vs 3.5mA) | Choose ADS1115IDGSR when external reference already exists and ultra-low sleep power is critical. |
| MAX11613AUT+T | 16-bit, 100ksps SAR, 2.7V–3.6V, 1.5mA active, 1μA sleep, internal 2.048V reference (15ppm/°C) | Faster sampling but higher noise; reference drift 3× worse than LTC2473IMS#TRPBF's 5ppm/°C | Choose MAX11613AUT+T when system requires >1ksps sampling and can tolerate reduced DC accuracy over temperature. |
Compared with ADS1115IDGSR and MAX11613AUT+T, the LTC2473IMS#TRPBF provides superior DC precision (±1mV offset, ±5ppm/°C reference) and true no-latency output - making it optimal for high-stability, low-speed sensor monitoring where absolute accuracy matters more than raw throughput.
Availability
LTC2473IMS#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 guaranteed traceable sourcing.
Supply support for LTC2473IMS#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2473IMS#TRPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in harsh environments where reference stability, input simplicity, and I²C ease-of-use are critical.
FAQ
What is the operating temperature range of the LTC2473IMS#TRPBF?
The LTC2473IMS#TRPBF is rated for –40°C to +85°C operation (I-grade). This extended range supports deployment in industrial control cabinets, outdoor environmental enclosures, and automotive under-hood sensor modules where ambient temperatures exceed commercial-grade limits. The part maintains specified performance including ±5ppm/°C reference drift and ±1mV offset error across this full range.
Does the LTC2473IMS#TRPBF require an external clock source?
No, the LTC2473IMS#TRPBF does not require an external clock source. It integrates a precision internal oscillator, eliminating the need for crystals, oscillators, or clock distribution circuitry. This simplifies layout, reduces BOM cost, and improves reliability in space-constrained or high-vibration applications. All timing-including conversion, oversampling, and I²C synchronization-is derived from this on-chip oscillator.
How does the sleep mode function in the LTC2473IMS#TRPBF?
In sleep mode (enabled by setting the SLP bit), the LTC2473IMS#TRPBF powers down both the ADC and the integrated 1.25V reference after conversion completion, reducing supply current to ≤2μA. Upon receiving a valid I²C address acknowledge, the reference restarts (12ms startup time with 0.1μF capacitors), followed by ADC activation. The first conversion after wake-up must be discarded or delayed to ensure reference settling before use.
Can the LTC2473IMS#TRPBF interface directly with thermocouples?
Yes, the LTC2473IMS#TRPBF can interface directly with thermocouples in differential mode. Its ±VREF input range (±1.25V), 16-bit resolution, and low input current (50nA) allow accurate digitization of thermocouple outputs without active buffering. For cold-junction compensation, pair it with a local temperature sensor on REF– or use an external ratiometric reference to maintain accuracy across wide temperature spans.
What is the significance of the A0 pin on the LTC2473IMS#TRPBF?
The A0 pin on the LTC2473IMS#TRPBF selects the device's 7-bit I²C address: tied to GND yields address 0010100 (0x24), and tied to VCC yields 1010100 (0x54). This enables two LTC2473IMS#TRPBF devices to share the same I²C bus without address conflict - essential for multi-channel sensor nodes or redundant measurement systems where board space prohibits separate buses.
LTC2473IMS#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2473IMS#TRPBF FAQ
1.How can I place an order for LTC2473IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2473IMS#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 LTC2473IMS#TRPBF reliable?
The price and inventory of LTC2473IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2473IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2473IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2473IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2473IMS#TRPBF?
LTC2473IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2473IMS#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 LTC2473IMS#TRPBF?
For technical support, including LTC2473IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2473IMS#TRPBF requirements.
6.How does Aetrix verify that LTC2473IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2473IMS#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 LTC2473IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2473IMS#TRPBF?
All LTC2473IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2473IMS#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 LTC2473IMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2473IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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