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Analog Devices Inc. LTC2473CDD#TRPBF
- Part No.:
- LTC2473CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2473CDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,926
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Product details
Overview
LTC2473CDD#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 ±1mV offset error and ±0.01% gain error, and targets high-accuracy sensor digitization in industrial monitoring systems.
For engineers reviewing the LTC2473CDD#TRPBF datasheet, LTC2473CDD#TRPBF pinout, LTC2473CDD#TRPBF application, or LTC2473CDD#TRPBF equivalent, key selection criteria include its differential input range (±VREF), 2µA max sleep current, 12-pin 3mm × 3mm DFN package, and guaranteed C-grade temperature range (0°C to 70°C).
Technical Context
The LTC2473CDD#TRPBF implements a delta-sigma architecture with internal oscillator, no external clock required, and proprietary input sampling that limits average input current to 50nA-enabling direct RC filter interfacing without significant error. Its decimating sinc filter provides relaxed anti-aliasing requirements due to oversampling ratios of 8,192 (208sps) or 2,048 (833sps).
It supports two power states: NAP (ADC off, reference on, ~800µA typical supply current) and SLEEP (ADC + reference off, ≤2µA). Reference startup time is 12ms with 0.1µF COMP/REFOUT capacitors, and conversion settling is single-cycle with no latency-critical for multiplexed sensor systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit-provides 65,536 distinct digital codes for high-fidelity sensor signal capture. |
| Input Type | Differential (±VREF)-rejects common-mode noise and enables bipolar measurement of transducer outputs. |
| Reference Accuracy | 1.247V to 1.253V (±0.1% initial), 2ppm/°C drift-ensures stable full-scale scaling across temperature without external trimming. |
| Output Rate | Selectable 208sps or 833sps-balances resolution, noise, and update speed for varying system bandwidth needs. |
| Supply Current | 3.5mA typ (conversion), ≤2µA max (sleep)-enables battery-powered or energy-constrained monitoring nodes. |
| Integral Nonlinearity | ±2 LSB (208sps), ±8.5 LSB (833sps)-defines maximum code deviation from ideal transfer curve under specified conditions. |
| Offset Error | ±1 mV-directly impacts zero-point accuracy in pressure or load cell interfaces. |
Pinout & Package
Package: 12-lead plastic DFN (3mm × 3mm), exposed pad (Pin 13) must be connected to PCB ground for thermal and electrical performance.
| 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 and low noise. |
| COMP (2) | Reference compensation | Connects to same 0.1µF capacitor as REFOUT; critical for reference startup time and transition noise control. |
| A0 (3) | I²C address select | Configures slave address: 0010100 (A0 = GND) or 1010100 (A0 = VCC); enables dual-device bus sharing. |
| GND (4,7,11,13) | Ground return | Multiple ground pins minimize impedance; exposed pad (13) must be soldered to solid ground plane. |
| SCL (5) | I²C clock input | Accepts up to 400kHz clock; device acts only as slave-no master capability. |
| SDA (6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit result MSB-first on SCL falling edges. |
| REF– (8) | Negative reference input | Sets ADC zero-input point; typically tied to system ground or remote sensor ground sense. |
| IN+ (9) | Differential positive input | Accepts voltage up to VREF; used with IN– for true differential measurement of bridge sensors. |
| IN– (10) | Differential negative input | Accepts voltage down to 0V; paired with IN+ for rejection of common-mode interference. |
| VCC (12) | Power supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing for clean reference and conversion performance. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency single-cycle conversion | Delivers valid 16-bit result per conversion with zero filter delay-simplifies timing in multiplexed sensor arrays. |
| Ultra-low input sampling current (50nA) | Enables use of simple RC filters (e.g., 1kΩ + 0.1µF) without introducing >1LSB error at full scale. |
| Integrated 1.25V reference (2ppm/°C) | Eliminates need for external reference IC or trimming, reducing BOM count and layout area in space-constrained designs. |
| Configurable power modes (NAP/SLEEP) | Reduces current from 3.5mA to ≤2µA-extends battery life in portable environmental monitors by orders of magnitude. |
| Internal oscillator | Removes requirement for external crystal or clock source, lowering system cost and improving reliability. |
Applications
| Industrial Process Monitoring | Environmental Sensor Hub |
|---|---|
|
Use Scenario: Continuous digitization of 4–20mA loop outputs from pressure, flow, and level transmitters in factory automation cabinets. IC Role / Device Role / Timing Role: Differential ADC front-end converting ratiometric bridge signals with high CMRR and stable reference scaling. Use Value: ±1mV offset error and 2ppm/°C reference drift ensure <0.1% total measurement uncertainty over 0°C–70°C operating range. |
Use Scenario: Multi-sensor node collecting temperature, humidity, and air quality data in smart building HVAC systems. IC Role / Device Role / Timing Role: Low-power sensor hub ADC managing intermittent readings from thermistors, RTDs, and gas sensors via shared I²C bus. Use Value: 2µA sleep current and automatic reference shutdown enable >5-year battery life using standard coin cells. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
|
Use Scenario: Precision cold-junction compensation in thermocouple-based temperature controllers for semiconductor process tools. IC Role / Device Role / Timing Role: High-accuracy differential input measuring thermistor or RTD voltage drops with minimal self-heating. Use Value: 50nA input current prevents measurable self-heating in high-resistance RTD elements (<100µW dissipation). |
Use Scenario: Retrofitting legacy 12-bit microcontroller ADCs in medical diagnostic equipment to meet new IEC 60601 resolution requirements. IC Role / Device Role / Timing Role: Standalone I²C ADC augmenting MCU capabilities without firmware changes or GPIO overhead. Use Value: Pin-compatible upgrade path with identical DFN footprint and software-transparent I²C register interface. |
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, internal 2.048V ref (±5ppm/°C), no integrated oscillator-requires external clock or MCU timing. | Higher gain options (2/4/8/16x PGA) but larger offset error (±150µV) and no differential input range scaling to ±VREF. | Choose ADS1115IDGSR when programmable gain is needed for microvolt-level signals; avoid if reference stability or zero-latency conversion is critical. |
| MAX11613EEE+ | 16-bit, 1ksps, internal 2.048V ref (±15ppm/°C), SPI interface only, no sleep mode below 10µA. | Lower power in active mode (900µA) but lacks ultra-low sleep current; requires SPI host and external reference decoupling. | Choose MAX11613EEE+ for SPI-based systems where board space allows separate reference filtering; avoid for battery-powered I²C nodes. |
Compared with ADS1115IDGSR and MAX11613EEE+, the LTC2473CDD#TRPBF uniquely combines differential ±VREF input scaling, 2ppm/°C reference drift, and ≤2µA sleep current in an I²C package-making it optimal for high-stability, low-power industrial sensing where reference integrity and conversion latency are design-critical.
Availability
LTC2473CDD#TRPBF is available at Aetrix Electronics and suitable for industrial process monitoring, environmental sensor hubs, and embedded ADC upgrades requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2473CDD#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 LTC2473CDD#TRPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in space- and energy-constrained industrial instrumentation.
FAQ
What is the operating temperature range for the LTC2473CDD#TRPBF?
The LTC2473CDD#TRPBF is rated for 0°C to 70°C (C-grade). This specification is guaranteed across all electrical parameters in the datasheet, including reference drift (±2ppm/°C), offset error (±1mV), and supply current (≤2µA sleep). Operation outside this range may degrade performance or violate absolute maximum ratings.
Does the LTC2473CDD#TRPBF require an external clock source?
No, the LTC2473CDD#TRPBF includes a fully integrated oscillator and requires no external clock components. The I²C interface uses only SCL and SDA lines; all timing-including conversion, oversampling, and reference startup-is managed internally by the LTC2473CDD#TRPBF.
How does the sleep mode function in the LTC2473CDD#TRPBF?
In sleep mode (SLP = 1), both the ADC and internal reference power down after conversion completion, reducing supply current to ≤2µA. The reference restarts automatically upon next I²C address acknowledge, with 12ms startup time when using 0.1µF COMP/REFOUT capacitors. The first conversion post-wakeup must be discarded or delayed.
Can the LTC2473CDD#TRPBF interface directly with a Wheatstone bridge sensor?
Yes-the LTC2473CDD#TRPBF's differential input (IN+, IN–) and integrated 1.25V reference are optimized for ratiometric bridge measurements. With 50nA input current and ±1mV offset error, it minimizes loading and zero-point drift, enabling direct connection without external amplification or calibration in most strain-gauge and pressure-sensor applications.
What is the significance of the "DD" in LTC2473CDD#TRPBF?
The "DD" suffix denotes the 12-lead (3mm × 3mm) plastic DFN package with exposed thermal pad. This package offers superior thermal performance (θJA = 43°C/W) and smaller footprint than the MSOP variant, making it ideal for compact industrial modules where heat dissipation and board space are constrained.
LTC2473CDD#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:
- 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-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2473CDD#TRPBF FAQ
1.How can I place an order for LTC2473CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2473CDD#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 LTC2473CDD#TRPBF reliable?
The price and inventory of LTC2473CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2473CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2473CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2473CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2473CDD#TRPBF?
LTC2473CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2473CDD#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 LTC2473CDD#TRPBF?
For technical support, including LTC2473CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2473CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2473CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2473CDD#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 LTC2473CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2473CDD#TRPBF?
All LTC2473CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2473CDD#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 LTC2473CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2473CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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